Senior Full Stack Engineer (.NET / React)

🏢 Summary: Hybrid Fullstack Engineer role in Warsaw focused on building scalable enterprise applications using Node.js, C#, .NET, React, AngularJS, and SQL Server. The position involves backend and frontend development, architecture contributions, and collaboration with cross-functional engineering teams. Experience with cloud-native and containerized technologies is considered a plus. 🗂️ Requirements: 7+ years of full-stack development experience, Expertise in React, Expertise in Node.js, Expertise in C#, Expertise in ASP.NET, Strong SQL Server experience, Experience building scalable enterprise applications, Experience developing APIs, Strong application design skills, Analytical and problem-solving skills, Attention to software quality, Communication skills, Collaboration skills 📃 Skills: Node.js, C#, .NET, React, AngularJS, SQL, T-SQL, ASP.NET, SQLServer, APIs, Cloud, Containers, Streaming 🏢 Description: Fullstack Engineer Warsaw, hybrid. Responsibilities Develop and maintain server-side applications using Node.js, C#, and .NET . Build responsive user interfaces with React and AngularJS . Design and optimize SQL Server solutions, including T-SQL and stored procedures. Contribute to application architecture, technical design, and technology decisions. Build scalable solutions leveraging modern cloud, container, and streaming technologies. Collaborate with cross-functional engineering teams to deliver high-quality software. Requirements 7+ years of full-stack development experience . Strong hands-on expertise in React, Node.js, C#, ASP.NET , and SQL Server . Experience developing scalable enterprise applications and APIs. Strong application design, analytical, and problem-solving skills. High attention to detail and commitment to software quality. Excellent communication and collaboration skills. Nice to Have Experience with cloud-native, containerized, or event-driven architectures. Financial services or large enterprise environment experience.

🏢 Summary: Senior Full-Stack Engineer role with a 50/50 backend and frontend focus, building scalable microservices-based applications using ASP.NET (C#) and React with TypeScript in a cloud-native environment. The position involves designing and maintaining REST APIs, developing responsive user interfaces, ensuring high test coverage, and contributing to architectural decisions with strong technical ownership. Poland-based employment (Umowa o Pracę) with remote flexibility and quarterly in-person collaboration. 🗂️ Requirements: MSc+ in Computer Science or equivalent, Minimum 5 years experience with ASP.NET and C#, Minimum 5 years experience building REST APIs, Minimum 5 years experience with React, Experience with TypeScript, Strong knowledge of microservices architecture, Knowledge of cloud design patterns, Experience with unit, integration, and end-to-end testing, High level of technical ownership, Fluent English (minimum B2), Poland residency 📃 Skills: ASP.NET, C#, REST, React, TypeScript, Microservices, AWS, Agile, DDD, UnitTesting, IntegrationTesting, E2ETesting, Cloud 🏢 Description: We’re looking for a Senior Full-Stack Engineer who brings deep technical expertise and a collaborative mindset to our product development team. You will work with a modern microservices architecture, building scalable backend services using the ASP.NET Web API with C#, and intuitive frontend interfaces using mainly React and TypeScript. This is a hands-on engineering role with a 50/50 front-/backend focus, ideal for someone who likes to take ownership, thrives in a dynamic product team, and enjoys mentoring others. This role could easily become a Tech Lead role in a foreseeable future. If you're passionate about designing high-impact software in a cloud-native environment, we’d love to hear from you. This Poland-based role offers remote flexibility, but we value in-person collaboration. Our team meets in Poland for at least one week each quarter, so we request all applicants to be located in Poland. This is not a globally remote role. Poland residency is required. The contract form is Umowa o Pracę (only, no B2B). What you will be responsible for Collaborate proactively in refinement sessions with product and tech teams to ensure clarity and feasibility of features. Design, implement, and maintain scalable web APIs using ASP.NET and microservices architecture principles. Develop responsive user interfaces with React and TypeScript that enhance usability and performance. Work closely with Product Owners to clarify feature requirements and ensure business context is well-understood. Define, design and align feature architecture with the Head of Engineering to ensure consistency and scalability. Ensure features meet Definition of Done, with state-of-the-art unit, integration, and end-to-end test coverage. Support incident response and production issue resolution as per team standards. Actively contribute to team knowledge sharing and coach colleagues in technical best practices. What makes you a match Essential Qualifications: MSc+ in Computer Science or equivalent 5 years of proven experience in building secure REST APIs using ASP.NET , as well as developing solid front-end applications with React are non-negotiable must haves. Comprehensive knowledge of contemporary web application architectures, with a focus on microservices and cloud design patterns. Demonstrated ability of high technical Ownership and Tech Leadership are a requirement for this role. Bonus Skills: Hands-on experience with AWS infrastructure. Experience working in cross-functional product teams using Agile practices and following Domain-Driven Design (DDD). Collaboration and Interpersonal Skills: Clear and adaptive communication with both technical and non-technical stakeholders. Strong sense of ownership, accountability, and proactive problem-solving. Languages: English: B2 - (No certificate required, but Fluency) German, Polish, Ukrainian: desired, not required What you can expect A dynamic, ambitious team where your voice is heard, and your contributions truly matter. You’ll have real ownership over your decisions in a trusted, cross-functional environment within a Swiss product company that puts people first. We offer fair compensation, flexible working hours, a hybrid work setup, and a culture that supports both personal and professional growth, fostering a healthy work-life balance. Employer of Record: For this role, we offer employment through our trusted Employer of Record provider Remote.com , ensuring full legal compliance and a seamless experience for our team members in Poland. ID Verification: To maintain a fair and secure hiring process, candidates may be asked to verify their identity their identity before speaking with our Recruiter. This step helps us prevent fraud and focus our resources on genuine applicants. About us Who we are esurance is a Swiss InsurTech offering a SaaS platform that connects SMEs, insurance providers, brokers, and business application providers. Founded in 2013, we're on a mission to make health insurance for small businesses truly hassle-free. What makes us unique You'll be part of a connected, forward-thinking team built on trust, openness, and mutual respect — working hybrid from Zürich or remotely across Europe. We invest in your growth through agile practices, real ownership, and a transparent Grading System that ensures fair pay and clear career paths. Our core values We are connected. We are ahead. We are clear. We are approachable. Do these resonate with you? → Come join us. Our Recruitment Process & Principles We keep our process transparent and respect your time: Application Review — You hear from us within 5 business days. Always. Recruiter Screen — A relaxed Get2Know call to explore mutual fit. Four Interviews — Two Role Knowledge interviews (peer + supervisor), one Culture Match, one Leadership conversation. Batched into two days wherever possible. Hiring Decision — Thoughtful, timely. You'll know within 1–2 weeks. Use of Artificial Intelligence (AI) We use AI to increase productivity and you're welcome to use it to polish your CV or Coverletter. Interviews and assessments should reflect your genuine self, though. Recruiting Agencies: We don't work with unsolicited agency submissions. Thanks for respecting this.

🏢 Summary: B2B contract for a Mid/Senior FullStack Engineer to modernize and migrate legacy .NET applications to a modular, cloud-native Azure architecture in the banking sector. The role combines backend development in .NET with frontend work in React, focusing on refactoring legacy systems, building scalable APIs, and implementing CI/CD and observability practices. Hybrid work model with strong influence on architectural decisions and cloud migration. 🗂️ Requirements: 5+ years of commercial experience with C# and .NET (Framework and .NET Core/6+), Strong proficiency in EF Core and MSSQL (query tuning, transactions, indexing), Commercial experience with React and TypeScript, Experience building and securing REST APIs (authentication, versioning, validation), Familiarity with Azure services (App Service, Functions, SQL, Service Bus, Storage), Experience with automated testing (unit, integration, contract, E2E), Experience with CI/CD pipelines (Azure DevOps or GitHub Actions), Ability to work with legacy .NET codebases (ASP.NET MVC, Razor, WPF, WinForms), English at B2+ level 📃 Skills: C#, .NET, .NETCore, .NET6, .NET8, EFCore, MSSQL, T-SQL, React, TypeScript, REST, Azure, AppService, AzureFunctions, AzureSQL, ServiceBus, AzureStorage, xUnit, Jest, Playwright, Cypress, Git, AzureDevOps, GitHubActions, ASP.NET, MVC, Razor, WPF, WinForms, DDD, CleanArchitecture 🏢 Description: We are looking for FullStack Engineer (.NET & React) Location: Kraków / Hybrid (7 days in the office per month) Contract Type: B2B Contract Seniority: Mid / Senior About the Project Join a high-impact modernization initiative for a leading player in the banking sector . We are transforming a portfolio of approximately a dozen .NET applications and MSSQL databases into a modular, cloud-native Azure architecture. As a FullStack Engineer, you will play a dual role: evolving existing production services (including legacy UI and desktop components) while systematically extracting business logic to re-implement it into a modern, scalable ecosystem. This is a unique opportunity to influence the transition from monolithic architectures to high-performance, distributed cloud services. Your Responsibilities Design & Development: Build backend services and APIs using .NET 6/8 following Clean Architecture and DDD patterns. Frontend Evolution: Develop and maintain React + TypeScript frontends, managing the incremental migration from legacy UI modules. Modernization: Read, refactor, and extract complex business logic from legacy .NET codebases and T-SQL stored procedures. Quality Assurance: Write and maintain comprehensive automated tests (Unit, Integration, Contract, and E2E). DevOps & Observability: Create CI/CD pipelines (Azure DevOps/GitHub Actions) and instrument services for deep observability (metrics, logs, distributed traces). Collaboration: Participate in domain modeling, architecture discussions, and Agile ceremonies with Architects and Product Owners. Skills & Experience We Require Experience: 5+ years of commercial experience with C# and the .NET ecosystem (both Framework and .NET Core/6+). Database Expertise: Strong proficiency in EF Core and MSSQL (including query tuning, transactions, and indexing). Frontend: Solid production experience with React and TypeScript. Web Services: Practical experience in building and securing REST APIs (Auth, Versioning, Validation). Cloud: Familiarity with Azure services (App Service, Functions, SQL, Service Bus, Storage). Testing & Tooling: Experience with xUnit, Jest, and Playwright/Cypress, as well as disciplined Git practices. Legacy Handling: The ability to read and reason about legacy codebases (ASP.NET MVC, Razor, WPF, or WinForms). Communication: English at a B2+ level for technical documentation and team collaboration. Nice to Have Experience with Infrastructure as Code (Terraform or Bicep). Knowledge of Docker and Kubernetes (AKS). Background in migrating monoliths to microservices. Azure Developer Associate certification. What We Offer Impact: Real influence on the architecture and the cloud migration roadmap. Autonomy: Direct collaboration with Tech Leads and Architects in a flat structure. Modern Stack: Opportunity to work with the latest .NET versions (6/8) and React. Efficiency: Fast technical onboarding with immediate access to repos, CI/CD pipelines, and monitoring tools. Flexible Hybrid Model: Remote-first approach with only 7 planned days in the Kraków office per month. Benefits : Luxmed and Multisport Card

🏢 Summary: Senior Fullstack .NET Developer role focused on modernizing a legacy business process management platform within a digital banking environment. The position involves rebuilding applications from .NET Framework to modern .NET, developing React frontend components, and deploying scalable solutions to Kubernetes. You will contribute to system design, automated testing, and AI-assisted development in an enterprise Agile setup. 🗂️ Requirements: 5+ years of experience with C# and .NET, Experience modernizing legacy applications from .NET Framework, Strong knowledge of React, Practical experience with LLM tools (Claude, Codex), Experience with automated testing, Hands-on experience with Docker and Kubernetes, Experience designing and implementing enterprise applications, Strong knowledge of MS SQL, Experience with Git, JIRA, and TeamCity 📃 Skills: CSharp, DotNet, DotNetFramework, React, Kubernetes, Docker, MSSQL, Git, JIRA, TeamCity, Claude, Codex, Agile 🏢 Description: Unleash innovative web solutions — shape the future of digital banking experiences! Łódź-based opportunity with hybrid work model (2 days in the office/month). As a Senior Fullstack .NET React Developer , you will be working for our client, a leading financial institution focused on delivering innovative digital banking solutions. You will join a strategic modernization initiative involving the redevelopment of a business process management platform. The project focuses on rebuilding legacy applications from .NET Framework to modern .NET technologies, migrating infrastructure from on-premises environments to Kubernetes, and implementing high-quality engineering practices. You will collaborate closely with AI-powered development tools, contribute to system design decisions, and help deliver scalable, secure, and maintainable solutions in a complex enterprise environment. Your main responsibilities: Develop and maintain backend services using .NET and C# Rebuild legacy applications from .NET Framework to modern .NET architecture Design and implement frontend components using React Create and maintain automated unit and regression tests Collaborate with business stakeholders to analyze and refine requirements Design scalable and maintainable software solutions Integrate applications with databases and external services Utilize LLM-based tools such as Claude and Codex to support software development activities Participate in code reviews and ensure adherence to development standards Deploy and support applications running in Kubernetes environments Work closely with cross-functional teams in an Agile delivery model You're ideal for this role if you have: At least 5 years of experience in software development using C# and .NET Experience with .NET Framework and modernizing legacy code Good knowledge of React Practical experience working with LLM tools such as Claude and Codex Strong experience with automated testing Hands on experience with Docker and Kubernetes Experience designing and implementing enterprise applications Strong knowledge of MS SQL Experience using Git, JIRA, and TeamCity Ability to work independently while collaborating effectively within a team English skills sufficient to write and understand technical documentation Nice to have: Knowledge of message brokers, especially RabbitMQ,

🏢 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: Long-term remote Full-Stack Developer role for a UK banking client within a global enterprise environment. The position involves building and maintaining .NET and React applications, integrating REST APIs, and working with SQL Server in a regulated financial services setting. Offers exposure to enterprise-scale banking solutions with a B2B contract and remote work from Poland. 🗂️ Requirements: 3+ years of full-stack development experience, Proficiency in C#, Experience with ASP.NET Core, Experience with .NET Web API, Experience with React, Knowledge of HTML5, Knowledge of CSS3, Knowledge of JavaScript, Knowledge of TypeScript, Experience with RESTful APIs, Experience with SQL Server, Knowledge of stored procedures, functions, and views, Experience with Entity Framework, Understanding of design patterns, Knowledge of database normalization, Experience with Azure DevOps, Knowledge of CI/CD, Understanding of application security, performance, and scalability, Bachelor's degree in Computer Science or related field 📃 Skills: C#, ASP.NET, .NET, React, HTML5, CSS3, JavaScript, TypeScript, REST, SQL, SQLServer, EntityFramework, AzureDevOps, CI/CD, Azure, SFTP 🏢 Description: We are looking for an experienced Full-Stack Developer to join a long-term project for one of the world's leading professional services organizations. You will work within a global technology team delivering solutions for a UK-based banking client in a regulated, enterprise-scale environment. Location: 100% Remote (Poland) with occasional visits to Warsaw office Client: Global professional services firm, banking & financial services sector, UK Requirements 3+ years of experience in full-stack development, with proficiency in most of the following: C#, ASP.NET Core, .NET Web API React — state management, component architecture HTML5, CSS3, JavaScript / TypeScript RESTful API design and integration SQL Server — queries, stored procedures, functions, views Entity Framework Design patterns and database normalization Azure DevOps for source control and CI/CD Application security, performance, and scalability best practices Bachelor's degree in Computer Science or related field Nice to Have Azure Cloud Services and cloud-native architecture SFTP and encryption/secure file transfer protocols Experience with vendor software integration and custom interfaces Responsibilities Design, develop, and maintain web applications using .NET (C#, ASP.NET Core) and React Build responsive user interfaces with HTML, CSS, JavaScript, and React Develop and consume RESTful APIs to connect client-side and server-side components Implement and optimize data storage using SQL Server (stored procedures, functions, views) Perform coding, debugging, testing, and troubleshooting throughout the development lifecycle Maintain and enhance existing systems, fixing complex bugs and escalating risks where needed Capture detailed requirements from stakeholders and translate them into technical specifications Ensure adherence to coding standards, design patterns, and security best practices Collaborate with vendor teams and third-party integrations Monitor emerging technologies and contribute ideas for continuous improvement We Offer 100% remote work from Poland Occasional team meetups in Warsaw Long-term project with a prestigious international client Exposure to enterprise-scale banking solutions B2B Contract Private medical care ( Luxmed ) MultiSport sports card

🏢 Summary: Full-Stack Developer role on a long-term, enterprise-scale banking project, delivering web solutions using .NET and React in a regulated environment. The position involves end-to-end development, API integration, and database optimization within a global technology team. Work is fully remote from Poland with collaboration on complex financial systems. 🗂️ Requirements: 3+ years of full-stack development experience, Proficiency in C# and ASP.NET Core, Experience with .NET Web API, Strong knowledge of React including state management and component architecture, Experience with HTML5, CSS3, JavaScript or TypeScript, Experience designing and integrating RESTful APIs, Strong SQL Server skills including queries and stored procedures, Experience with Entity Framework, Knowledge of design patterns and database normalization, Experience with Azure DevOps for source control and CI/CD, Understanding of application security, performance, and scalability best practices, Bachelor's degree in Computer Science or related field 📃 Skills: C#, .NET, ASP.NETCore, WebAPI, React, HTML5, CSS3, JavaScript, TypeScript, REST, SQL, SQLServer, EntityFramework, AzureDevOps 🏢 Description: We are looking for an experienced Full-Stack Developer to join a long-term project for one of the world's leading professional services organizations. You will work within a global technology team delivering solutions for a UK-based banking client in a regulated, enterprise-scale environment. Location: 100% Remote (Poland) with occasional visits to Warsaw office Client: Global professional services firm, banking & financial services sector, UK Requirements 3+ years of experience in full-stack development, with proficiency in most of the following: C#, ASP.NET Core, .NET Web API React — state management, component architecture HTML5, CSS3, JavaScript / TypeScript RESTful API design and integration SQL Server — queries, stored procedures, functions, views Entity Framework Design patterns and database normalization Azure DevOps for source control and CI/CD Application security, performance, and scalability best practices Bachelor's degree in Computer Science or related field Nice to Have Azure Cloud Services and cloud-native architecture SFTP and encryption/secure file transfer protocols Experience with vendor software integration and custom interfaces Responsibilities Design, develop, and maintain web applications using .NET (C#, ASP.NET Core) and React Build responsive user interfaces with HTML, CSS, JavaScript, and React Develop and consume RESTful APIs to connect client-side and server-side components Implement and optimize data storage using SQL Server (stored procedures, functions, views) Perform coding, debugging, testing, and troubleshooting throughout the development lifecycle Maintain and enhance existing systems, fixing complex bugs and escalating risks where needed Capture detailed requirements from stakeholders and translate them into technical specifications Ensure adherence to coding standards, design patterns, and security best practices Collaborate with vendor teams and third-party integrations Monitor emerging technologies and contribute ideas for continuous improvement We Offer 100% remote work from Poland Occasional team meetups in Warsaw Long-term project with a prestigious international client Exposure to enterprise-scale banking solutions B2B Contract Private medical care ( Luxmed ) MultiSport sports card

🏢 Summary: Hybrid Senior Fullstack Developer role focused on building and maintaining large-scale, event-driven microservices systems using modern Java and Spring Boot alongside Angular-based SPAs. The position involves end-to-end development, security implementation, and active participation in CI/CD and Agile processes. Requires strong hands-on experience across backend and frontend technologies in distributed environments. 🗂️ Requirements: Minimum 6 years professional software development experience, Senior-level hands-on experience with large-scale applications, Strong fullstack experience (backend and frontend), Java 17+ (Java 21 preferred), Spring Boot 3.x and microservices architecture, Experience with Kafka and event-driven systems, Experience with Node.js and TypeScript, Proven experience building SPAs with Angular, Strong SQL skills with Oracle, Experience with OAuth2 and OIDC, Understanding of OWASP web security principles, Experience with Git version control, Experience with GitLab CI, Ability to work in Agile (Scrum/Kanban) environments, Professional English proficiency 📃 Skills: Java, Spring, SpringBoot, Microservices, Kafka, Node.js, TypeScript, Angular, SQL, Oracle, OAuth2, OIDC, OWASP, Git, GitLab, CI/CD, DDD, Redis, Docker, Kubernetes, Jenkins, Maven, Webpack, Python, Jira, Confluence 🏢 Description: Senior Fullstack Developer . This is a hybrid position based in Warsaw , (50% on-site presence). Responsibilities Design, implement and maintain backend services using modern Java (versions 17–21) and Spring Boot 3.x within microservices architectures. Develop and maintain frontend components and Single Page Applications using Node.js, TypeScript and Angular, ensuring maintainability and sound frontend architecture. Architect and implement event-driven and messaging solutions using Kafka; integrate with relational databases (Oracle) and in-memory stores (Redis). Apply Domain-Driven Design principles to model complex business domains and deliver modular, testable solutions. Contribute to security design and implementation of web applications, including OAuth2/OIDC integration and adherence to OWASP principles. Participate in CI/CD pipelines (GitLab CI required), version control workflows (Git), and use developer tools such as IntelliJ and VS Code. Collaborate with distributed, international teams using Agile methodologies (Scrum/Kanban), Jira and Confluence; perform code reviews and provide practical technical guidance to peers. Qualifications Minimum 6 years of professional software development experience, with senior-level, hands-on delivery on large-scale applications. Strong fullstack background; backend-only candidates will not be considered. Excellent written and spoken English. Required technical skills: Java 17 or newer (Java 21 experience preferred) Spring Boot (3.x) and microservices Kafka (event-driven / messaging systems) Domain-Driven Design (DDD) Node.js and TypeScript Proven experience building SPAs with Angular Strong SQL skills, particularly with Oracle Security and tooling: Practical experience with OAuth2 and OIDC; strong understanding of web application security and OWASP principles Version control with Git and CI/CD with GitLab CI (required) Familiarity with Kafka in both backend and operational contexts Working knowledge of Jira and Confluence Desirable (nice to have): Experience with Redis Familiarity with Docker and Kubernetes Experience with Jenkins, Maven and Webpack Python and familiarity with AI-based code generation tools Experience working in distributed, international teams and a DevOps mindset. Benefits Hybrid working arrangement: Warsaw, Poland — approximately 50% on-site presence. Opportunity to work on large-scale systems using modern Java, microservices and event-driven architectures. Collaboration within distributed, international teams and exposure to established Agile and DevOps practices. Use of contemporary developer tooling and platforms (IntelliJ, VS Code, GitLab CI, Kafka, Spring Boot). Scope to apply and deepen expertise in security, DDD and end-to-end fullstack development. Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere. Agile approach and no bureaucracy. Outstanding integration trips to various places in Europe for all employees. Activities to support your well-being and health. Luxmed Gold Extended medical care and Multisport Plus benefit. If you meet the stated qualifications and are interested in this opportunity, we encourage you to apply via the application form.

🏢 Summary: 12-month full-time contract (with possible extension) for a Senior FullStack Developer to enhance and maintain a Corporate Netbank application in the banking sector. The role focuses on developing and modernizing backend and frontend components, implementing new features, fixing bugs, and supporting production in both microservice and monolithic architectures. Hybrid work model with 3 days per week in the Warsaw office. 🗂️ Requirements: Minimum 5 years experience with Java 7/8, Minimum 5 years experience with Spring Framework, Minimum 5 years experience with Spring Boot, Minimum 5 years experience with Maven, Minimum 5 years experience with JSP, Minimum 5 years experience with JavaScript, Minimum 5 years experience with SQL, Minimum 5 years experience with Git, Experience writing REST APIs, Backend service design and implementation, Experience with microservice architecture, Experience with monolithic architecture, Experience in unit testing, Minimum 2 years experience with Angular, Minimum 2 years experience with Jasmine, Experience working in Agile environments 📃 Skills: Java, Maven, JSP, JavaScript, SQL, Git, Spring, SpringBoot, REST, Angular, Jasmine, Microservices, Monolith, UnitTesting 🏢 Description: Location: hybrid - 3 days a week from the office in Warsaw Duration of assignment: 12 months first contract (prolongation expected). Language: English Industry: banking. Workload: Full time Overview The position of Senior FullStack Developer is a crucial role within our Corporate Netbank system team. You will contribute significantly to enhancing an application designed for large corporate clients to manage their accounts efficiently. The developer should possess strong experience in backend and frontend technologies, with a collaborative mindset and a commitment to excellence. Main Responsibilities Maintain and enhance the Corporate Netbank Application. Implement new features and bug fixes. Respond to production incidents and make compliance changes. Develop and improve services in both microservice and monolithic architectures. Participate in transitioning from legacy systems to modern solutions. Key Requirements Minimum 5 years of experience with Maven, JSP, JavaScript, Java 7/8, Git, Spring Framework, Spring Boot, SQL. Proven experience in writing REST APIs. Backend services design and implementation skills. Experience in unit testing. At least 2 years of experience with Angular and Jasmine. Proficient in agile working environments. Strong analytical skills for legacy code. Excellent communication skills. Fluency in English. Nice to Have Knowledge of SOLID principles and design patterns.

🏢 Summary: Senior Full-Stack Engineer (.NET & React) role focused on building scalable APIs and microservices powering music and content experiences across a global fitness platform. The position involves designing distributed backend systems, supporting real-time music playback, and collaborating cross-functionally to deliver high-quality features at scale. Hybrid work model in Warsaw with competitive salary and comprehensive benefits. 🗂️ Requirements: 5+ years of professional software development experience, Strong knowledge of C#, Strong knowledge of .NET ecosystem, Experience building and maintaining RESTful APIs, Understanding of asynchronous programming, Understanding of multithreading, Experience with NoSQL databases, Familiarity with microservices architecture, Working knowledge of React, Vue.js or similar frontend frameworks, Experience with CI/CD pipelines, Experience with automated testing, Understanding of DevOps principles, Understanding of Agile methodologies, English communication skills 📃 Skills: C#, .NET, REST, React, Vue, MongoDB, AWS, S3, SQS, Lambda, Microservices, CI/CD, Docker, Kubernetes, RabbitMQ, NServiceBus 🏢 Description: We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere. We are looking for a Senior Full-Stack Engineer (.NET & React) to join the Content Platform team, focused on building systems that power music-related experiences across the product ecosystem. In this role, you will design and develop APIs and backend services that support everything from instructor class planning to real-time music playback during workouts. This is a hands-on engineering role with strong ownership, where you will work on distributed systems, collaborate across teams, and directly impact user-facing features at scale. Key takeaways: Stack : C#, .NET, REST APIs, React/Vue, MongoDB, AWS (S3, SQS, Lambda), microservices Salary : 23 000 PLN - 28 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office Location : ul. Grzybowska 60, Warsaw Recruitment process : A call with MOTIFE Recruiter Panel interviews with the team (coding, architecture, and cross-collaboration interviews, Hiring Manager meeting) Responsibilities: Backend Development & Architecture Design, build, and maintain scalable APIs and microservices supporting content and music-related features Develop systems for managing music catalogs, class planning tools, and platform integrations Ensure high performance, reliability, and scalability of backend services Technical Excellence Write clean, maintainable, and well-tested code with a focus on long-term sustainability Drive best engineering practices, including CI/CD, automated testing, logging, and monitoring Continuously improve system architecture while avoiding unnecessary complexity Collaboration & Delivery Partner closely with Product, Design, and QA to deliver high-quality features Actively participate in architecture discussions, code reviews, and technical planning Translate UI/UX requirements into reliable backend solutions Engineering Culture Contribute to a culture of code quality, ownership, and continuous improvement Promote practices such as refactoring, pair programming, and iterative development Support knowledge sharing and help evolve engineering standards across the team Requirements: Technical Expertise 5+ years of professional software development experience Strong knowledge of C# and .NET ecosystem Experience building and maintaining RESTful APIs Solid understanding of asynchronous programming and multi-threading Experience with NoSQL databases (e.g., MongoDB) Familiarity with microservices architecture Frontend & Platform Awareness Working knowledge of React, Vue.js, or similar frontend frameworks Understanding of system integration and API-driven development Engineering Practices Experience with CI/CD pipelines, automated testing, and DevOps principles Understanding of Agile and Lean development methodologies Strong focus on code quality, maintainability, and scalability Collaboration & Mindset Strong communication skills in English Ability to work effectively in cross-functional teams Comfortable working in fast-paced, evolving environments Nice to Have Experience with Docker and Kubernetes Familiarity with AWS services (S3, SQS, Lambda) Experience with messaging systems (e.g., NServiceBus, RabbitMQ) What we offer: 100% paid medical care Multisport Creative tax (KUP) Home office allowance MacBook Pro