Full-Stack Architect (.NET + React)

🏢 Summary: Full-time Senior Full Stack Engineer role focused on building and enhancing a SaaS marketplace platform hosted on AWS, using React and JavaScript technologies. The position involves developing complex back-end logic and contributing to a global engineering team. The role requires overlap with CET working hours and emphasizes high-quality, test-driven development. 🗂️ Requirements: 6+ years of full-stack development experience, 4+ years of experience with Node.js and/or Python, 4+ years of experience with React, Strong knowledge of JavaScript and TypeScript, Experience with ES6, Ability to write standards-compliant HTML and CSS, Experience with Test Driven Development, Familiarity with Git, Knowledge of Linux or Unix-based systems, Experience with RESTful web services 📃 Skills: React, JavaScript, TypeScript, Node.js, Python, HTML, CSS, TDD, Git, Linux, Unix, REST, AWS, ES6 🏢 Description: Svitla Systems Inc. is looking for a Senior Full Stack Engineer with React and JavaScript for a full-time position (40 hours per week) in Europe. Our client is a leading on-site work marketplace seeking creative and skilled developers to join the global engineering team. The mission is to design and develop technology that improves users' lives while providing an exceptionally high level of service. The cutting-edge technology SaaS solution hosted on AWS that enables today's and tomorrow’s Gig economy. Overlap till 7 pm CET. Requirements: 6+ years of experience in full-stack development. 4+ years of experience with Node.js and/or Python, React. Strong knowledge of JavaScript/TypeScript, ES6, and React. Understanding of writing clean, standards-compliant HTML and CSS. Strong focus and experience in Test Driven Development. Familiarity with the Git version control system. Knowledge of Linux or other Unix-based systems (Ubuntu/Debian is a plus). Understanding of web services-based solutions (REST specifically). Strong written and verbal communication skills. Ability to work well with others as part of a team and across teams. Ability to break down more significant initiatives into manageable pieces. Upper-intermediate level of English. Nice to have: Experience with Preprocessor (LESS/Sass). Experience working with offshore teams. Experience with React-native. Responsibilities: Participate in developing a feature connected with complex back-end logic for the client-worker part. Take part in team meetings, including daily stand-ups and backlog refinement sessions. Provide code refactoring when needed. We offer: US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!

🏢 Summary: Full-time Senior Full-Stack Engineer role focused on designing and building scalable, high-performance data-driven applications using C# and modern web technologies. The position involves end-to-end development in an Agile environment, including architecture, coding, testing, and optimization of web and API solutions. The role requires strong experience with secure coding practices, CI/CD, and AI tools within the SDLC. 🗂️ Requirements: BSc in Computer Science, STEM, or equivalent experience, 7+ years of experience building scalable, high-performance data-driven applications, Experience designing service-based or tiered web and mobile applications, Strong experience with C#, Experience with WCF or Web API, Experience with SQL Server, Experience using AI tools within the SDLC, Experience working in a CI/CD environment, Knowledge of secure coding practices aligned with OWASP, Experience working in Scrum or Kanban environments 📃 Skills: C#, WCF, WebAPI, SQLServer, AI, OWASP, Scrum, Kanban, CI/CD, REST 🏢 Description: Svitla Systems Inc. is looking for a Senior Full-Stack Engineer (C#/React) for a full-time position (40 hours per week) in Europe. Our client is a leading global provider that gathers information and reports to enhance the environmental and social impacts on the business. Responsibilities: Participate in the Agile software development (Scrum/Kanban) from concept design, to full-stack code and testing. Write concise code, clear, well-tested, well-documented and with quality that adhere to industry best practices. Optimize code for quality, performance, scalability, efficiencies and security; through testing, code scanning, refactoring and monitoring. Collaborate with product owners to define/refine requirements, break down into development tasks, estimate effort, and plan milestones & deliverables. Develop and maintain UI applications (web, mobile, etc.) and/or web APIs (RESTful & messaging-based). Identify opportunities for innovation, improvement of software architecture and cloud infrastructure; and/or offer new ideas. Advocate for simplicity, reliability, manageability, scalability, extensibility, reusability and performance. Be a proactive team member who contributes, collaborates and demonstrates positive behaviour. Provide development expertise to team members through education and review. Always open to new ideas and encourages innovative practices amongst peers. Makes sure to constantly address technical debt - escalating when it becomes a risk to quality or timely delivery of our software. Carries out root cause analysis on defects to ensure fixes are happening in the right way. Requirements: BSC in Computer Science, STEM (Science, Technology, Engineering, and Math), or equivalent work experience. 7+ years of experience designing and building scalable, high-performance data-driven software applications. Experience designing service-based and/or tiered web and mobile applications. Excellent experience with C#. Web Services (WCF/Web API), SQL Server. Experience with JavaScript, React, TypeScript, jQuery, HTML, CSS, and SASS is desired. Experience with cloud deployment models (Azure), pipelines, and CI/CD is desired. Experience utilizing AI tools within projects and to support aspects of the SDLC is essential. Understanding and adhering to secure coding practices that meet OWASP standards. Experience working in a continuous integration and deployment environment. Experience practicing Scrum/Kanban and the ability to adapt to Scrum values. Strong analytical and problem-solving skills. Works effectively and independently in a dynamic team environment. Proven time management, organizational, and follow-up skills to meet deadlines. Quality-oriented with a passion for customer satisfaction. Excellent interpersonal and communication skills. Demonstrated initiative to learn and experiment with new technologies and processes. Strong work ethic and professionalism. Nice to have: Experience with C++ What we offer: US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community

🏢 Summary: Full-time Senior/Staff Full-Stack Engineer role focused on building an AI-enabled operational monitoring and decision-support platform for cold-chain logistics. The position involves hands-on architecture design, backend and frontend development, and leadership in creating scalable, event-driven AWS cloud systems. The engineer will shape technical standards, integrate IoT and analytics data, and deliver secure, high-availability applications in an evolving, early-stage environment. 🗂️ Requirements: Bachelor's degree in Computer Science, Computer Engineering, or similar, 8+ years of software engineering experience, Strong proficiency in Python for backend and serverless development, Commercial experience with Angular and/or React, Experience with high-load and scalable systems, Hands-on experience with AWS Amplify, Experience designing and consuming GraphQL and RESTful APIs, Deep knowledge of AWS services (Lambda, API Gateway, DynamoDB, S3, Step Functions, CloudWatch, Secrets Manager), Experience with relational and NoSQL databases, Experience with event-driven architectures and messaging systems, Experience with caching technologies, Understanding of application security (OAuth2, JWT, API security best practices), Experience with backend and frontend testing frameworks, Experience with Infrastructure as Code and Docker, Experience designing and maintaining CI/CD pipelines, Knowledge of HIPAA or HITRUST compliance requirements 📃 Skills: Python, Angular, React, TypeScript, AWS, Lambda, FastAPI, API Gateway, DynamoDB, S3, StepFunctions, CloudWatch, SecretsManager, AppSync, GraphQL, REST, PostgreSQL, SQS, SNS, EventBridge, Kafka, Redis, ElastiCache, OAuth2, JWT, Cognito, pytest, Jasmine, Karma, Cypress, Playwright, Terraform, CloudFormation, CDK, Docker, GitHubActions, CodePipeline, Amplify 🏢 Description: Svitla Systems Inc. is looking for a Senior/Staff Full-Stack Engineer(Python/Angular/React) for a full-time position (40 hours per week) in Europe. Our client is a global developer of technology platforms that develop temperature control products. You'll serve as the anchor engineer for a new AI-enabled operational monitoring and decision-support platform in the cold-chain shipping space. It is a senior, hands-on leadership role for a builder who can help shape the initial architecture, define engineering standards, and lead the technical implementation of a platform that integrates IoT telemetry, shipment workflow data, operational analytics, and future AI-driven capabilities. It's not a maintenance role, nor is it a narrowly defined feature factory position. This individual must be comfortable operating in an early-stage environment where requirements are evolving, business priorities are closely tied to real-world operational outcomes, and the engineering team must help translate business and logistics workflows into scalable software systems. The right candidate will be equally comfortable discussing architecture with technical stakeholders, refining platform direction with business leadership, building backend APIs, and guiding the structure of internal operational dashboards and exception-management tools. Requirements: Bachelor's degree in Computer Science, Computer Engineering, or similar 8+ years of software engineering experience with meaningful depth in both backend and frontend development. You should be strong in at least one side and comfortable contributing to the other. Strong proficiency in Python for backend and serverless development (Lambda, FastAPI, or similar). Experience with front end technologies (Angular and/or React) Commercial experience with high-load systems and scaling systems Hands-on experience with AWS Amplify for hosting, authentication, and connecting frontend applications to cloud services. Strong experience designing, building, and consuming both GraphQL APIs (AWS AppSync preferred) and RESTful APIs. Understanding of query optimization, subscriptions, versioning, and documentation (OpenAPI/Swagger). Deep knowledge of AWS services, including Lambda, API Gateway, DynamoDB, S3,Step Functions, CloudWatch, and Secrets Manager. Experience with relational and NoSQL databases (e.g., PostgreSQL, DynamoDB). Experience building event-driven systems using message queues and streaming services (SQS, SNS, EventBridge, Kafka). Familiarity with caching layers like Redis or ElastiCache. Solid understanding of security across the stack, including OAuth 2.0, JWT, API rat limiting, input validation, XSS prevention, CSRF protection, and secure token storage on the client side. Experience building test suites on both sides of the stack. Backend testing with pytest or similar, frontend testing with Jasmine, Karma, Cypress, Playwright, or similar. Experience with frontend performance profiling, Core Web Vitals optimization, and bundle analysis is a plus. Experience collaborating with stakeholders to build data pipelines, or integrate AI-driven features into production systems. Working knowledge of HIPAA or HITRUST compliance requirements for healthcare applications, including audit logging, PHI handling, data encryption, and secure session management. Comfortable with Infrastructure as Code (Terraform, CloudFormation, or CDK) and containerization (Docker). Experience with CI/CD pipeline design and implementation (GitHub Actions, AWS CodePipeline, Amplify CI/CD, or similar). Strong analytical and problem-solving skills with a focus on delivering polished user experiences backed by reliable infrastructure. Excellent communication skills and experience working in Agile environments. Responsibilities: Design, develop, and maintain fullstack applications with Python on the backend and Angular with TypeScript on the frontend, all deployed on AWS. Build and optimize serverless backend services using AWS Lambda, API Gateway, DynamoDB, S3, and Step Functions. Develop responsive, accessible frontend interfaces using Angular, with AWS Amplify for hosting, authentication (Cognito), and API integration. Design and integrate both GraphQL (AppSync) and RESTful APIs, handling everythin from backend implementation to frontend consumption, ensuring efficient data fetching, error handling, and state management. Architect data models, database schemas, and service-to-service communication patterns for complex business domains. Build and maintain event-driven architectures using SQS, SNS, EventBridge, o similar messaging services to support reliable, decoupled system communication. Implement caching strategies on both the backend (Redis, ElastiCache) and frontend (query caching, local state) to improve performance across the stack. Design and implement secure authentication and authorization flows using OAuth 2.0, JWT, and AWS Cognito, covering both server-side validation and client-side token management. Own features end-to-end, from database schema and API design through to the Angular components and user interactions that bring them to life. Collaborate closely with product managers, backend engineers, frontend engineers, and data science/ML teams to define system architecture, UI/UX requirements, and technical approach. Develop scalable, multi-tier cloud architectures with a focus on high availability and disaster recovery. Implement and maintain CI/CD pipelines for both frontend and backend deployments using tools like GitHub Actions, AWS CodePipeline, Amplify CI/CD, or similar. Build and maintain comprehensive test suites across the stack, including backend unit and integration tests (pytest) and frontend testing (Jasmine, Karma, Cypress, or Playwright). Establish and maintain structured logging, monitoring dashboards, error tracking, and alerting to support production reliability and fast incident response across both backend services and frontend applications. Participate in on-call rotations and lead incident response when production issues arise, including root cause analysis and follow-up improvements. Conduct code reviews and mentor junior engineers, fostering a culture of continuous learning and quality. Design and integrate AI-driven solutions within cloud infrastructure, working closely with stakeholders, build data pipelines, and create intuitive interfaces for AI-powered features. Implement cost optimization strategies and FinOps practices to manage cloud spending effectively. Stay current with emerging AWS services, Angular ecosystem updates, frontend tooling, and industry trends to continuously improve the technology stack. Document development processes, system architecture, component libraries, and key decisions for knowledge sharing. We offer: US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!

🏢 Summary: Full-time Senior Full Stack Developer role focused on building scalable frontend applications and BFF services using TypeScript, React, Node.js, and NestJS. The position involves API and LLM integrations, frontend architecture design, performance optimization, and collaboration with product and engineering teams. Hybrid work from Kraków is expected 2–3 days per week. 🗂️ Requirements: Strong experience with TypeScript, Several years of software engineering experience, Strong React and modern frontend development expertise, Experience with frontend unit and integration testing, API design and development experience with NestJS, Experience with Node.js, Understanding of server-side rendering and Server Components, Knowledge of CDN strategies and caching, Understanding of software architecture and system design, Experience with Docker, Experience with Git, Experience with CI/CD, Experience with Azure, Ability to work in uncertain environments and solve problems pragmatically 📃 Skills: TypeScript, React, NestJS, Node.js, Docker, Git, CI/CD, Azure, GraphQL, Zustand, ReactQuery, Python 🏢 Description: Role overview Svitla Systems Inc. is looking for a Senior Full Stack Developer for a full-time position (40 hours per week) in Kraków, Poland. Our client is a British wholesale distributor. You will be responsible for building user interfaces with TypeScript and React, developing and maintaining BFF services, integrating APIs and LLM services, designing scalable frontend architecture, optimizing application performance and user experience, implementing error handling and resilience patterns, and collaborating with product and engineering teams to deliver features from prototype to production. Office work is expected 2-3 days per week. Responsibilities Building user interfaces using TypeScript and React. Building and maintaining Backend for Frontend (BFF) services to orchestrate API calls and shape data for user interface needs. Integrating APIs, LLM services, and streaming endpoints to deliver product features. Designing and implementing scalable and maintainable frontend architecture. Ensuring performance, responsiveness, and optimal user experience across the application. Implementing error handling, loading states, and resilience patterns for distributed systems. Collaborating with product and engineering teams to bring concepts from prototype to production. Requirements Strong hands-on experience with TypeScript development. Several years of experience in software engineering, ideally with a strong focus on React and modern frontend development tools. Experience with frontend testing, including unit and integration testing. API design and development experience using NestJS and Node.js. Understanding of server-side rendering, Server Components, CDN strategies, and caching. Solid understanding of software architecture, clean code, and system design. Ability to work effectively in environments with a high degree of uncertainty and take a pragmatic, solution-oriented approach to problem-solving. Experience with Docker, Git, CI/CD, and Azure. Nice to Have Knowledge of GraphQL APIs. Experience with state management libraries (e.g. Zustand, React Query). Familiarity with Python, particularly in the context of working with backend services or AI-powered systems. Experience building data-intensive or real-time user interfaces. Familiarity with designing user experiences for AI-powered features or non-deterministic outputs. We offer US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in the workspace, either remote or in our welcoming office. Comprehensive medical insurance after one month. MultiSport card with access to 2500 sports facilities all over Poland Bonuses for recommendations of new employees. Bonuses for article writing, public talks, and other activities. 15 vacation days, 10 national holidays, 10 sick leaves, and family days off. Personalized learning program tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Welcome and anniversary presents, gifts for children, and more. Regular corporate events and meetups. Awesome team, friendly and supportive community!

🏢 Summary: Full-time Senior Full Stack Engineer role building and scaling a high-throughput cloud platform for call tracking, marketing attribution, real-time analysis, and AI-driven workflows. The position involves hands-on development across backend and frontend systems, contributing to architecture, integrations, and production stability in a fast-moving startup environment. The engineer will work closely with founders to deliver scalable, reliable features with strong ownership and minimal oversight. 🗂️ Requirements: Senior-level full stack engineering experience in production environments, Strong backend development experience with Node.js, Strong frontend development experience with React or similar frameworks, Experience designing and maintaining complex web applications and APIs, Experience with relational databases and production data models, Knowledge of PostgreSQL or similar relational databases, Understanding of REST APIs and distributed system design, Experience integrating third-party APIs and external systems, Ability to debug and troubleshoot production systems, Experience balancing scalability, performance, and maintainability 📃 Skills: Node.js, React, JavaScript, PostgreSQL, SQL, REST, APIs, Redis, Python, HTML, CSS, Git, Cloud, AI 🏢 Description: Svitla Systems Inc. is looking for a Senior Full Stack Engineer for a full-time position (40 hours per week) in Europe. Our client is building an advanced cloud platform for call tracking, marketing attribution, real-time call analysis, and intelligent workflow automation in the pay-per-call and lead generation space. The company is in a hypergrowth phase and is actively scaling both its product platform and engineering capability. The platform combines high-throughput infrastructure, deterministic backend systems, real-time integrations, and AI-driven functionality to support transcription, summarization, extraction, scoring, and increasingly sophisticated agent-enabled workflows. You'll operate with a high degree of independence and make meaningful contributions across both backend and frontend systems. It is a hands-on senior engineering role for someone comfortable working directly with founders, shipping quickly, solving difficult production problems, and contributing to architectural and implementation decisions in a fast-moving startup environment. This role is best suited to an engineer with strong technical depth, sound judgment, product awareness, and the ability to move quickly without creating unnecessary technical debt. The right candidate will not need a heavy process, extensive oversight, or narrow task-by-task direction. This person should be able to step into an evolving system, understand the broader technical and business context, and deliver high-quality work in a practical, efficient way. The engineer will work closely with the founders and the rest of the engineering team, contributing directly to core product and platform development. The client has made it clear that they value engineers based on their performance in a real working environment, not on artificial interview exercises or theoretical problem-solving detached from production realities. Requirements: Strong experience as a Senior Full Stack Engineer, with clear ownership of both backend and frontend production systems. Solid experience in backend engineering with Node.js in real-world production environments. Expertise in frontend engineering with React or similar modern JavaScript frontend frameworks. Understanding of design, build, and maintain complex web applications and APIs that support meaningful business workflows. Strong experience working with relational databases, application data models, and production data access patterns. Knowledge of PostgreSQL or similar relational database technologies in production systems. In-depth understanding of REST APIs, asynchronous workflows, distributed integration patterns, and service-based application design. Experience integrating with third-party APIs and external systems in production environments. Ability to work effectively in evolving codebases and make good engineering decisions without requiring excessive structure or hand-holding. Expertise in debugging and troubleshooting across application logic, integrations, and production issues. Ability to balance delivery speed with long-term maintainability in a startup or high-growth environment. Nice to have: Experience working in startup or hypergrowth environments where engineers are expected to take ownership and move quickly. Familiarity with Redis, caching strategies, job processing, or event-driven application behavior. Exposure to Python and collaboration with AI or data-oriented systems. Experience building or supporting systems with high throughput, near-real-time workflows, or operationally sensitive business logic. Background in AdTech, MarTech, call tracking, attribution platforms, lead generation systems, or analytics-heavy products. Experience building internal operational tooling and admin workflows for technical or business users. Exposure to cloud-native environments and scalable distributed systems. Experience collaborating closely with technical founders, product leadership, or senior engineering stakeholders. Responsibilities: Design, build, and maintain production-grade application features across both backend and frontend systems, with strong attention to scalability, performance, reliability, and maintainability. Develop backend services and APIs using Node.js to support platform capabilities such as workflow orchestration, system integrations, feature logic, internal tooling, and real-time operational processing. Build and enhance frontend applications using React or similar modern frontend technologies to support dashboards, management interfaces, internal tools, and user-facing platform capabilities. Take ownership of significant technical areas and deliver solutions with minimal day-to-day oversight, while collaborating closely with founders and other senior engineers. Work on systems that support high-volume workflows, external integrations, and operationally important product capabilities where responsiveness and reliability matter. Implement and maintain integrations with external partner platforms, APIs, and data-driven systems, including CRM platforms, call-tracking systems, and other third-party services that are central to the product ecosystem. Contribute to architectural discussions and technical decisions related to application structure, data flow, performance optimization, maintainability, and production stability. Investigate and resolve production bottlenecks, system issues, and integration challenges in a practical, efficient manner. Collaborate with AI and data engineering team members where needed to connect backend and frontend product capabilities with intelligent workflows such as transcription, data extraction, scoring, or analytics-driven features. Help establish sound engineering patterns and raise the quality bar as the team scales, including code quality, implementation discipline, and pragmatic technical decision-making. Participate in a fast-moving engineering culture where new features, experiments, and improvements are shipped continuously. We offer: US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!

🏢 Summary: Full-time Senior Full Stack Engineer role focused on building and maintaining scalable backend services with .NET and Java/Kotlin, and contributing to frontend development with Angular. The position involves designing secure APIs, driving UI architecture, and working within Agile teams to deliver commercial software products. Approximately 20–30% of the role is dedicated to frontend development. 🗂️ Requirements: 5+ years of commercial software development experience, Strong experience with .NET (C#) backend development, Strong experience with Java or Kotlin backend development, Hands-on experience with Kotlin in backend environments, Knowledge of Angular and TypeScript, Experience designing and working with RESTful APIs and SOAP APIs, Understanding of backend architecture, performance, security, scalability, Knowledge of Azure Cloud and application deployment, Familiarity with Azure DevOps and CI/CD processes, Experience with modern web development practices, Experience working in Agile/Scrum environments, Bachelor’s degree in Computer Science or equivalent experience, Strong English communication skills 📃 Skills: .NET, C#, Java, Kotlin, Angular, TypeScript, REST, SOAP, Azure, AzureDevOps, CI/CD 🏢 Description: Svitla Systems Inc. is looking for a Senior Full Stack Engineer with .NET, Java, and Angular for a full-time position (40 hours per week) in Europe. Our client is a leading global provider that gathers information and reports to enhance the environmental and social impacts on the business. A Senior Engineer must have strong backend expertise in .NET and Java/Kotlin, as well as frontend experience in Angular. Requirements: 5+ years of commercial experience in software development. Strong experience with .NET (C#) and Java/Kotlin backend development. Hands-on experience with Kotlin in backend environments. Knowledge of Angular and TypeScript. Understanding of designing and working with RESTful APIs and SOAP APIs. Solid understanding of backend architecture, including performance, security, and scalability. Knowledge of Azure Cloud, including deployment and scaling of applications. Familiarity with Azure DevOps and CI/CD processes. Strong understanding of modern web development practices. Experience working in Agile/Scrum environments. Strong communication skills in English. Bachelor’s degree in Computer Science or equivalent experience. Responsibilities: Work within an Agile team to design, estimate, develop, test, and deliver commercial software products. Develop and maintain backend services using .NET and Java/Kotlin. Design and implement secure, scalable RESTful APIs and services. Contribute to frontend development using Angular and TypeScript (~20–30%). Drive UI architecture and develop reusable UI components. Ensure best practices and design guidelines for UI and backend development. Write clean, maintainable, and efficient code for both client-side and server-side applications. Develop unit and integration tests; collaborate with QA to resolve issues. Collaborate with Product Owners and stakeholders to refine requirements and user stories. Contribute to project estimation, planning, timelines, and status updates. Provide technical guidance and mentorship where needed. We offer: US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!

🏢 Summary: Full-time Senior/Staff Full-Stack Engineer role focused on building and leading the architecture of an AI-enabled operational monitoring platform in the cold-chain logistics domain. The position involves hands-on development with Python and Angular on AWS, designing scalable, event-driven, and serverless systems. The engineer will define technical standards, implement cloud-native solutions, and integrate IoT, analytics, and AI-driven capabilities. 🗂️ Requirements: Bachelor’s degree in Computer Science, Computer Engineering, or similar, 8+ years of full-stack software engineering experience, Strong proficiency in Python for backend and serverless development, Solid proficiency in Angular (v14+) and TypeScript, Experience with AWS Amplify for hosting and authentication, Experience designing and consuming GraphQL and REST APIs, Deep knowledge of AWS services (Lambda, API Gateway, DynamoDB, S3, Step Functions, CloudWatch, Secrets Manager), Experience with relational and NoSQL databases, Experience building event-driven systems with messaging/streaming services, Familiarity with caching systems, Knowledge of OAuth 2.0 and JWT-based authentication, Experience building backend and frontend test suites, Experience with Infrastructure as Code and containerization, Experience designing and implementing CI/CD pipelines, Working knowledge of HIPAA or HITRUST compliance 📃 Skills: Python, Angular, TypeScript, RxJS, AWS, Lambda, FastAPI, Amplify, AppSync, GraphQL, REST, API Gateway, DynamoDB, S3, StepFunctions, CloudWatch, SecretsManager, PostgreSQL, SQS, SNS, EventBridge, Kafka, Redis, ElastiCache, OAuth2, JWT, Cognito, pytest, Jasmine, Karma, Cypress, Playwright, Terraform, CloudFormation, CDK, Docker, GitHubActions, CodePipeline 🏢 Description: Svitla Systems Inc. is looking for a Senior/Staff Full-Stack Engineer(Python/Angular) for a full-time position (40 hours per week) in Europe . Our client is a global developer of technology platforms that develop temperature control products. You'll serve as the anchor engineer for a new AI-enabled operational monitoring and decision-support platform in the cold-chain shipping space. It is a senior, hands-on leadership role for a builder who can help shape the initial architecture, define engineering standards, and lead the technical implementation of a platform that integrates IoT telemetry, shipment workflow data, operational analytics, and future AI-driven capabilities. It's not a maintenance role, nor is it a narrowly defined feature factory position. This individual must be comfortable operating in an early-stage environment where requirements are evolving, business priorities are closely tied to real-world operational outcomes, and the engineering team must help translate business and logistics workflows into scalable software systems. The right candidate will be equally comfortable discussing architecture with technical stakeholders, refining platform direction with business leadership, building backend APIs, and guiding the structure of internal operational dashboards and exception-management tools. This role requires working hours with overlap till 7:00 PM-8:00 PM CET Requirements : Bachelor's degree in Computer Science, Computer Engineering, or similar 8+ years of software engineering experience with meaningful depth in both backend and frontend development. You should be strong in at least one side and comfortable contributing to the other. Strong proficiency in Python for backend and serverless development (Lambda, FastAPI, or similar). Experience with front end technologies (Angular and/or React) Commercial experience with high-load systems and scaling systems Hands-on experience with AWS Amplify for hosting, authentication, and connecting frontend applications to cloud services. Strong experience designing, building, and consuming both GraphQL APIs (AWS AppSync preferred) and RESTful APIs. Understanding of query optimization, subscriptions, versioning, and documentation (OpenAPI/Swagger). Deep knowledge of AWS services, including Lambda, API Gateway, DynamoDB, S3,Step Functions, CloudWatch, and Secrets Manager. Experience with relational and NoSQL databases (e.g., PostgreSQL, DynamoDB). Experience building event-driven systems using message queues and streaming services (SQS, SNS, EventBridge, Kafka). Familiarity with caching layers like Redis or ElastiCache. Solid understanding of security across the stack, including OAuth 2.0, JWT, API rat limiting, input validation, XSS prevention, CSRF protection, and secure token storage on the client side. Experience building test suites on both sides of the stack. Backend testing with pytest or similar, frontend testing with Jasmine, Karma, Cypress, Playwright, or similar. Experience with frontend performance profiling, Core Web Vitals optimization, and bundle analysis is a plus. Experience collaborating with stakeholders to build data pipelines, or integrate AI-driven features into production systems. Working knowledge of HIPAA or HITRUST compliance requirements for healthcare applications, including audit logging, PHI handling, data encryption, and secure session management. Comfortable with Infrastructure as Code (Terraform, CloudFormation, or CDK) and containerization (Docker). Experience with CI/CD pipeline design and implementation (GitHub Actions, AWS CodePipeline, Amplify CI/CD, or similar). Strong analytical and problem-solving skills with a focus on delivering polished user experiences backed by reliable infrastructure. Excellent communication skills and experience working in Agile environments. Responsibilities: Design, develop, and maintain fullstack applications, all deployed on AWS. Build and optimize serverless backend services using AWS Lambda, API Gateway, DynamoDB, S3, and Step Functions. Develop responsive, accessible frontend interfaces using Angular, with AWS Amplify for hosting, authentication (Cognito), and API integration. Design and integrate both GraphQL (AppSync) and RESTful APIs, handling everythin from backend implementation to frontend consumption, ensuring efficient data fetching, error handling, and state management. Architect data models, database schemas, and service-to-service communication patterns for complex business domains. Build and maintain event-driven architectures using SQS, SNS, EventBridge, o similar messaging services to support reliable, decoupled system communication. Implement caching strategies on both the backend (Redis, ElastiCache) and frontend (query caching, local state) to improve performance across the stack. Design and implement secure authentication and authorization flows using OAuth 2.0, JWT, and AWS Cognito, covering both server-side validation and client-side token management. Own features end-to-end, from database schema and API design through to the Angular components and user interactions that bring them to life. Collaborate closely with product managers, backend engineers, frontend engineers, and data science/ML teams to define system architecture, UI/UX requirements, and technical approach. Develop scalable, multi-tier cloud architectures with a focus on high availability and disaster recovery. Implement and maintain CI/CD pipelines for both frontend and backend deployments using tools like GitHub Actions, AWS CodePipeline, Amplify CI/CD, or similar. Build and maintain comprehensive test suites across the stack, including backend unit and integration tests (pytest) and frontend testing (Jasmine, Karma, Cypress, or Playwright). Establish and maintain structured logging, monitoring dashboards, error tracking, and alerting to support production reliability and fast incident response across both backend services and frontend applications. Participate in on-call rotations and lead incident response when production issues arise, including root cause analysis and follow-up improvements. Conduct code reviews and mentor junior engineers, fostering a culture of continuous learning and quality. Design and integrate AI-driven solutions within cloud infrastructure, working closely with stakeholders, build data pipelines, and create intuitive interfaces for AI-powered features. Implement cost optimization strategies and FinOps practices to manage cloud spending effectively. Stay current with emerging AWS services, Angular ecosystem updates, frontend tooling, and industry trends to continuously improve the technology stack. Document development processes, system architecture, component libraries, and key decisions for knowledge sharing. We offer US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, other activities Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!

🏢 Summary: Senior Full Stack Developer role focused on architecting and delivering high-performance web applications using React and Node.js. The position involves leading system design, building scalable front-end and back-end solutions, and overseeing cloud-based deployments and DevOps processes. The role includes technical ownership of microservices, APIs, databases, and application performance in a hybrid Warsaw-based setup. 🗂️ Requirements: 7+ years full stack development experience, 2+ years in senior or technical lead role, Expert-level React.js with Hooks and Redux, Advanced JavaScript ES6+ proficiency, Strong Node.js and Express.js experience, Experience designing REST or GraphQL APIs, Experience with OAuth, JWT, sessions, RBAC, Database design and optimization with PostgreSQL, MySQL, or MongoDB, Hands-on Docker experience, Experience with AWS, Azure, or GCP, CI/CD pipeline management experience, Proficiency with Git workflows, Bachelor’s or Master’s in Computer Science or related field 📃 Skills: React, Redux, JavaScript, HTML5, CSS3, Node.js, Express, GraphQL, REST, OAuth, JWT, RBAC, PostgreSQL, MySQL, MongoDB, Docker, Kubernetes, AWS, Azure, GCP, Git, CI/CD, Webpack, Babel, Vite 🏢 Description: 🧩 About the Company Our client is a rapidly growing US-based technology firm with global operations. With a strong commitment to innovation and quality engineering, the company is building a new engineering hub in Warsaw. This is your opportunity to join a high-performing team and play a pivotal role in developing next-generation digital solutions for the private capital markets. 📍 Location & Setup Start remotely and transition to a hybrid model based in Warsaw (3 days/week in the office in the coming months). 🧠 The Role: Senior Full Stack Developer (React & Node.js) We’re looking for an expert-level Senior Full Stack Developer with at least 7 years of professional experience in designing, architecting, and delivering high-performance web applications. You will take ownership of complex technical challenges across both the front-end and back-end, drive architectural decisions, and provide technical leadership and mentorship within the software development lifecycle. 🔧 Key Responsibilities Technical Leadership: Architect and develop scalable, responsive UIs with React.js, Redux, and modern JavaScript (ES6+). System Design: Design, build, and scale advanced server-side applications, microservices architecture, and RESTful/GraphQL APIs with Node.js and Express. Data Architecture: Lead database design, optimization, and integration strategies (PostgreSQL, MySQL, or MongoDB). Quality Assurance: Define testing strategies, write robust unit/integration tests, and establish efficient debugging protocols for the team. DevOps & Deployment: Oversee and optimize CI/CD pipelines, containerization using Docker, and cloud deployments. Agile Mentorship: Lead agile collaboration with product managers, designers, and engineers, while mentoring mid-level and junior developers. Performance: Proactively monitor system performance, identify bottlenecks, and maintain high-availability production-grade applications. Standards: Establish and maintain comprehensive technical documentation and coding standards. 📌 What We’re Looking For Front-End: Expert-level experience with React.js, Hooks, Redux, and complex component-based architecture. Deep mastery of HTML5, CSS3, and ES6+. Advanced configuration and optimization experience with build tools like Webpack, Babel, or Vite. Back-End: Senior-level proficiency in Node.js & Express.js for enterprise applications. Extensive API design and architecture experience (GraphQL highly preferred, alongside REST). Deep understanding and implementation experience with advanced security and authentication protocols: OAuth, JWT, sessions, and RBAC. Databases & DevOps: Proven experience in scaling and optimizing relational and non-relational databases (PostgreSQL, MySQL, or MongoDB). Solid hands-on experience with Docker; Kubernetes experience is highly advantageous. Demonstrated experience designing and deploying applications on cloud platforms (AWS, Azure, or GCP). Advanced proficiency with Git workflows and driving Agile/Scrum methodologies. 🎓 Qualifications Bachelor’s or Master’s in Computer Science or a related field. 7+ years of hands-on experience in full stack development. 2+ years of experience in a senior or technical lead capacity. Proven track record of architecting, deploying, and maintaining high-traffic production applications. 💡 Soft Skills Strategic, analytical thinker and highly effective problem-solver. Strong technical leadership, team collaboration, and cross-functional communication skills. Self-motivated with excellent time management and the ability to drive projects autonomously. Passion for continuous learning, adopting new technologies, and sharing knowledge with the team. 🎁 What’s Offered Competitive salary up to $6,200 USD/month. Hybrid remote role with 3 days form office in the heart of Warsaw Generous Paid Time Off (PTO). Comprehensive full benefits package. The unique chance to shape the technical foundation of a new engineering hub and lead high-impact projects. A supportive, innovation-driven work environment that values technical excellence.

🏢 Summary: Mid-level Full-stack Developer role focused on building and maintaining web and mobile applications using React and .NET technologies. The position involves developing scalable backend services, microservices, and SEO-friendly frontends integrated with CMS, within a multinational Agile environment. The role combines frontend, backend, cloud, and DevOps responsibilities with regular team collaboration. 🗂️ Requirements: 2–4 years experience as FullStack Developer, .NET 8/10 proficiency, C# proficiency, Strong React knowledge, JavaScript proficiency, TypeScript proficiency, HTML5 knowledge, CSS3 knowledge, Experience with RESTful APIs, Experience with Git, Experience with Microsoft Azure (Functions, Durable Functions, CosmosDB, ServiceBus, Application Insights), Experience with CI/CD pipelines, Experience with Agile methodologies, Communicative English (B2+) 📃 Skills: .NET, C#, React, JavaScript, TypeScript, HTML5, CSS3, REST, Git, Azure, Functions, CosmosDB, ServiceBus, ApplicationInsights, CI/CD, ReactNative, Expo, Sanity, GROQ, Redux, RxJS, Tanstack, Sentry, Firebase, Analytics 🏢 Description: Join Our Team as a Full-stack Developer (React, C#)! We are seeking a talented Mid FullStack Developer proficient in .NET and React to join our team. As part of our company culture, we value collaboration and regular in-person interactions. Our team meets every two months in our Poznań office for informal gatherings to connect, share ideas, and strengthen teamwork in a relaxed setting. You will work in multinational environment and will be responsible for designing and implementing software solutions, utilizing both front-end and back-end technologies. This role requires strong problem-solving skills, excellent communication abilities, and a passion for delivering high-quality code. Ready to take the next step in your career? Apply now and join us! Key Responsibilities: • Design and develop SEO-friendly web application, based on React and TypeScript and integrated with Sanity CMS. • Contributing to a mobile application using React Native, TypeScript and Expo . • Build and maintain microservices to enhance the web experience, including features like roadside assistance, car repair bookings, and membership management. • Develop robust and scalable backend systems using .NET 8/10, Azure ServiceBus, Functions, CosmosDB and more. • Utilize Sentry for error monitoring and Google Analytics/Firebase to track user behaviour and optimize performance. Requirements : Proven experience (2-4 years) as a FullStack Developer Proficiency in .NET (preferably .NET 8/10), C# Strong understanding of front-end technologies, including React, JavaScript, TypeScript, HTML5, and CSS3 Practical knowledge of clean-code principles and patterns, drive to write clean, testable and maintainable code Experience with RESTful APIs and Web Services Knowledge of version control systems, such as Git Excellent problem-solving and analytical skills Familiarity with Microsoft Azure platform (Functions and Durable Functions, CosmosDb, ServiceBus, Application Insights) Experience with DevOps approach and CI/CD pipelines Strong communication and interpersonal skills, communicative English (B2+) Experience with Agile development methodologies Nice to have: Experience in working with Sanity CMS and GROQ query language (or any other headless CMS) Familiarity with Figma or similar tools At least basic knowledge about Server Side Rendering and libraries like: Redux, RxJS, Tanstack Experience in working with mobile apps and practical knowledge of React Native, Expo, Expo Application Services Knowledge of microservices architecture and software integration patterns We offer: Conference/workshop budget of approximately 10000 PLN!- the budget renews every year and can be used for conferences, workshops, training programs, certifications, studies, or other development initiatives. "Fabresikowe": one-time 1000 PLN bonus to create your work space more comfortable and more tailored to your needs! Relaxing office massages In-house trainings Team events Frequent company events Free breakfast every day Free beverages, fresh fruit, snacks Chill out room English and Norwegian classes

🏢 Summary: Senior Full Stack Developer role focused on building scalable, cloud-native applications using React and C# .NET Core within capital markets risk domains. The position involves developing microservices, REST APIs, data pipelines with Python (pyspark), and enterprise Power BI solutions. Strong emphasis on event-driven architectures, CI/CD automation, and Azure-based cloud environments. 🗂️ Requirements: 10+ years software development experience, Strong proficiency in React.js and JavaScript/TypeScript, Expertise in C# and .NET Core, Experience building REST APIs and microservices, Hands-on experience with Python and pyspark, Extensive Power BI development experience, Strong knowledge of microservices and event-driven architectures, Experience with CI/CD pipelines, Experience with Azure or AWS, Proficiency in SQL databases, Experience with Docker and Kubernetes, Understanding of credit risk and market risk domains 📃 Skills: React, JavaScript, TypeScript, Redux, C#, .NET, Python, pyspark, PowerBI, DAX, SQL, SQLServer, PostgreSQL, Docker, Kubernetes, Azure, AWS, Kafka, EventHub, Jenkins, GitHub, AzureDevOps, REST, Microservices 🏢 Description: About the Role We are seeking a highly experienced Senior Full Stack Developer with deep expertise in React on the frontend and C# .NET Core on the backend. The ideal candidate will have substantial hands-on experience developing scalable applications, strong exposure to cloud-native architectures, and a solid understanding of capital markets—particularly in credit risk and market risk domains. Experience with Python (pyspark) for data-driven workflows and a strong command of CI/CD, microservices, and event-driven architectures is essential. ________________________________________ Key Responsibilities Design, develop, and maintain full stack applications using React, C#.NET Core, and supporting technologies. Build high-performance backend services, RESTful APIs, and microservices with focus on scalability, maintainability, and resilience. Develop responsive, modular, and accessible UI components using React and modern JS/TS patterns. Collaborate closely with business stakeholders and risk domain experts to deliver solutions in credit risk, market risk, and related capital markets functions. Work with Python (pyspark) for data transformation, data pipelines, and analytics workflows. Develop, optimize, and maintain Power BI dashboards, data models, and analytical reports for business users. Implement and optimize CI/CD pipelines, ensuring robust automated testing, deployment, and monitoring. Architect and contribute to event-driven and distributed system designs using technologies such as Kafka, Event Hub, or similar. Drive engineering best practices: code reviews, unit/integration testing, performance tuning, documentation. Contribute to cloud migration and modernization initiatives, especially in Azure or AWS environments. Mentor junior developers and collaborate within a cross-functional agile team. ________________________________________ Required Skills & Experience Technical Skills 10+ years of professional software development experience. Front-end: Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, hooks, and modern UI patterns. Back-end: Expertise in C# .NET Core, C#, REST APIs, Web APIs, and microservices-based development. Python (pyspark): Hands-on experience with distributed data processing, data pipelines, and analytic transformations. Power BI: Extensive experience developing dashboards, data models, DAX calculations, and enterprise-grade BI solutions. Strong understanding of data modeling, performance tuning, and governance in Power BI. Architecture: Strong knowledge of microservices, API design, event-driven architectures, and distributed systems. DevOps / CI/CD: Experience with Azure DevOps, GitHub Actions, Jenkins, or similar. Strong understanding of automated builds, testing, deployment, and monitoring. Cloud Platforms: Experience with Azure or AWS (Azure preferred). Databases: Proficiency with SQL Server, PostgreSQL, or other relational databases; NoSQL knowledge a plus. Containerization: Experience with Docker, Kubernetes, container orchestration. Domain Knowledge Understanding of capital markets, specifically: Credit risk (PD, LGD, EAD, credit exposure modeling, counterparty risk). Market risk (VaR, sensitivities, stress testing, pricing concepts). Familiarity with regulatory frameworks (e.g., Basel, FRTB, IFRS9) is a strong advantage. ________________________________________ Soft Skills Strong analytical and problem solving abilities. Excellent communication skills and ability to interact with technical and non-technical stakeholders. Collaborative, agile mindset with experience in Scrum/Agile environments. Ability to work independently and lead technical solutions end to end.