Full Stack Engineer (React / Node.js)

🏢 Summary: Senior Frontend Engineer role focused on designing and developing scalable, high-performance applications using React and TypeScript. The position involves leading frontend architecture decisions, building reusable components, integrating RESTful APIs, and ensuring code quality through testing and CI/CD. The role operates within an Agile environment with close collaboration across teams. 🗂️ Requirements: 8+ years software engineering experience, Strong commercial experience with React.js, Expertise in JavaScript, Expertise in TypeScript, Experience with Redux, Experience with Redux-Saga, Experience with modern React hooks, Experience with state management, Experience integrating RESTful APIs, Understanding of component-driven architecture, Experience with responsive UI development, Proficiency with Git, Experience with CI/CD practices, Experience working in Agile/Scrum 📃 Skills: React, TypeScript, JavaScript, Redux, Redux-Saga, Hooks, REST, Microservices, Git, CI/CD, Agile, Scrum 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Scope: Design and develop scalable and high-performance frontend applications using React and TypeScript Lead the development of modern, user-facing features with a strong focus on usability and performance Build reusable components and implement state management solutions (Redux, Redux Saga) Collaborate closely with backend engineers to integrate RESTful APIs and microservices Contribute to frontend architecture decisions, including component structure, routing, and performance optimization Ensure high code quality through code reviews, automated testing, and CI/CD practices Participate actively in Agile (Scrum) ceremonies and cross-functional collaboration Skills: 8+ years of software engineering experience, including strong commercial experience with React.js Strong expertise in JavaScript and TypeScript Proven experience with React ecosystem (Redux, Redux Saga, modern hooks, state management) Solid understanding of component-driven architecture and responsive UI development Experience integrating frontend applications with RESTful APIs Strong knowledge of Git and version control workflows Experience working in Agile/Scrum environments Nice to Have: Experience with cloud platforms (GCP, AWS, Azure) Familiarity with containerization (Docker, Kubernetes) DevOps knowledge (CI/CD, monitoring, automation) Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: Full-stack developer role focused on building and maintaining web applications using TypeScript, Node.js, and React, with strong emphasis on serverless solutions in AWS. The position involves developing cloud-based applications, managing infrastructure with AWS CDK, and implementing CI/CD pipelines. The role requires collaboration in an agile team to deliver high-quality, tested software solutions. 🗂️ Requirements: 3+ years full-stack development experience, Proficiency in TypeScript, Proficiency in Node.js, Proficiency in React, Experience with AWS Lambda, Experience with AWS CDK, Experience with relational databases, Experience with CI/CD pipelines, Knowledge of modern web architecture 📃 Skills: TypeScript, Node.js, React, AWS, Lambda, CDK, PostgreSQL, CI/CD, CodePipeline, Jest, SQL 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Responsibilities: Design, develop, and maintain full-stack web applications using TypeScript, Node.js, and React. Build and deploy serverless applications using AWS Lambda and manage infrastructure with AWS CDK. Work with relational databases such as PostgreSQL and optimize database interactions. Implement CI/CD pipelines using AWS CodePipeline or similar tools. Write automated tests using Jest or similar frameworks to ensure high-quality code. Collaborate closely with cross-functional teams in an agile environment. Skills: 3+ years of professional full-stack development experience. Strong proficiency in TypeScript, Node.js, React. Experience with serverless applications on AWS (Lambda). Experience with AWS CDK for infrastructure management. Solid understanding of relational databases (PostgreSQL or similar). Experience with CI/CD pipelines. Knowledge of modern web application architecture. Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: The role involves designing, developing, testing, and maintaining native Android applications within Agile teams, ensuring high-quality, secure, and maintainable code. The position includes release management, performance optimization, and mentoring team members while following best development practices. It requires collaboration on CI/CD processes and continuous improvement of mobile applications. 🗂️ Requirements: Proven experience in native Android development, Strong knowledge of Kotlin and Android SDK, Experience with Jetpack Compose, Hands-on experience with unit testing and test automation, Experience with CI/CD pipelines for mobile applications, Experience with REST APIs integration, Knowledge of Google Play Store publishing and certificate management, Experience with Git, Understanding of mobile security best practices 📃 Skills: Kotlin, Android, AndroidSDK, JetpackCompose, AndroidStudio, ADB, Emulator, TDD, CICD, REST, JSON, XML, Git, IntelliJ, VSCode 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Scope: Design, develop, test, and maintain native Android applications Collaborate within Agile teams and contribute to best practices and technical standards Ensure delivery of high-quality, maintainable, and well-tested code Mentor team members and support knowledge sharing Manage and coordinate application releases to production Apply secure coding practices and follow corporate development standards Contribute to performance, quality, and process improvements Troubleshoot, debug and optimize application performance Skills: Proven experience in native Android development Strong knowledge of Kotlin, Android SDK, and Jetpack Compose Experience with Android Studio, ADB, and Emulator tools Hands-on experience with unit testing and test automation (TDD is a plus) Experience with CI/CD pipelines for mobile applications Knowledge of Google Play Store publishing and certificate management Strong debugging and problem-solving skills Experience with REST APIs, JSON, and XML Understanding of mobile security and accessibility best practices Experience with Git and modern IDEs (IntelliJ, VS Code) Familiarity with Agile methodologies and collaborative environments Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: The offer is for an Automation Engineer role focused on designing, developing, and maintaining automation solutions and dynamic web applications. The position involves building end-to-end automation workflows, supporting containerized and server environments, and contributing to CI/CD and DevOps initiatives. The role also includes system integrations, operational support, and continuous improvement across multiple environments. 🗂️ Requirements: Strong experience in automation engineering, Experience in process orchestration, Hands-on experience with PHP, Hands-on experience with Symfony, Hands-on experience with MariaDB, Hands-on experience with Docker, Hands-on experience with Ansible, Experience with CI/CD pipelines, Experience with DevOps practices, Experience with system integrations, Experience with configuration automation, Experience with server and infrastructure management, Understanding of incident and operations management 📃 Skills: PHP, Symfony, MariaDB, Docker, Ansible, CI/CD, DevOps, Automation, Orchestration, Linux 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Scope: Design, develop, deploy, and maintain automation solutions and dynamic web applications Build and optimize end-to-end automation workflows and process orchestration solutions Develop reusable automation components and system integrations Support containerized and server-based environments through configuration automation Maintain and enhance web applications and backend services Participate in CI/CD implementation and DevOps initiatives Provide operational and incident support, including coordination with Level 2 teams Collaborate with business, operations, and technical stakeholders across multiple environments Ensure high-quality, stable, and compliant solution delivery Promote best practices and contribute to continuous improvement initiatives Skills: Strong experience in automation engineering and process orchestration Hands-on experience with: PHP, Symfony, MariaDB, Docker, Ansible Experience with CI/CD pipelines and DevOps practices Knowledge of system integrations, reusable components, and configuration automation Experience with server and infrastructure management Understanding of incident and operations management processes Strong communication, collaboration, and organizational skills Ability to work independently and manage multiple activities simultaneously Nice to Have French language proficiency Experience working in international and multi-vendor environments Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: Mid–Senior QA Engineer role focused on delivering manual and automated testing for web applications, backend/microservices, and APIs, with strong emphasis on test automation and quality strategy. The position involves frontend and API automation, end-to-end testing, and contributing to mobile and AI-based testing initiatives. The role requires independent work, troubleshooting across systems, and ensuring high product quality. 🗂️ Requirements: 5+ years experience in software testing or development, Strong experience in web application testing, Strong experience in backend/microservices testing, Hands-on API testing and automation experience, Experience with test automation tools, Experience with frontend test automation, Experience with end-to-end testing, Experience with mobile testing, Ability to work independently and define test strategy, Fluent English 📃 Skills: Cypress, TypeScript, REST-assured, Postman, Kotlin, Appium, API, Microservices, AI, Automation, Web 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Scope: Deliver manual and automated testing for web applications and backend/microservices Perform API testing and automation (e.g., REST-assured, Postman) Develop frontend test automation ( Cypress, TypeScript preferred ) Support end-to-end testing and troubleshooting across UI, backend, and integrations Contribute to mobile testing (manual/automated; Appium is a plus) Improve testing efficiency through automation and AI-based tools Work independently, drive test strategy, and ensure high product quality Skills: 5+ years in software testing or development (mid–senior level) Strong experience in web and backend/microservices testing Hands-on API testing and automation experience Experience with test automation tools (e.g., Cypress; TypeScript is a plus) Familiarity with REST-assured, Postman ; Kotlin is an advantage Experience with mobile testing (Appium is a plus) Strong analytical and troubleshooting skills Experience or interest in AI-based testing tools is a plus Fluent English and willingness to travel quarterly (Vienna/Bratislava/Prague) Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: The offer is for a technical role focused on building, automating, and maintaining cloud-based infrastructure and backend systems in Azure. It involves developing deployment pipelines, supporting test and development environments, and implementing scalable backend services and REST APIs. The position also includes managing live releases and ensuring reliability of cloud infrastructure and applications. 🗂️ Requirements: Experience with Python programming, Hands-on experience with Azure cloud services, Experience in building and managing REST APIs, Experience with web frameworks (FastAPI, Flask, or Django), Experience with CI/CD pipelines using Azure DevOps, Experience in infrastructure design and deployment, Experience in build and deployment automation, Experience in backend system development, Ability to manage and support test environments 📃 Skills: Python, Azure, REST, FastAPI, Flask, Django, CI/CD, AzureDevOps, APIs, Infrastructure, Automation 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Scope: Assist in building and maintaining test environments , including support and issue resolution. Provide technical design for infrastructure and deployment solutions. Develop and maintain build and code deployment automation pipelines . Support and enhance development tools and environments . Plan, coordinate, and execute live implementation releases . Develop and maintain backend systems ensuring scalability and reliability. Implement and manage Azure services and associated infrastructure . Build and manage REST APIs to expose business logic and services. Skills: Python programming Azure cloud services and infrastructure management REST API development and Web frameworks (e.g., FastAPI, Flask, Django) CI/CD pipelines using Azure DevOps Nice-to-Have: Knowledge of the banking domain Understanding of behavior/motivation-driven development or design Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: Development role focused on building and maintaining AI-enabled Java applications and scalable microservices in cloud environments. The position involves integrating AI tools into enterprise systems and delivering cloud-native solutions on GCP. It requires collaboration with engineering teams to implement robust backend and API integrations. 🗂️ Requirements: Strong hands-on Java development experience, Experience building microservices architectures, Experience with distributed systems, Practical experience with AI projects or AI integrations, Experience with Google Cloud Platform, Knowledge of REST APIs, Experience with backend integrations, Familiarity with containerization technologies, Familiarity with CI/CD pipelines, Experience working in Agile environments 📃 Skills: Java, Microservices, DistributedSystems, AI, GCP, REST, APIs, Docker, Kubernetes, CICD, Cloud, Agile 🏢 Description: SNI is serving as a trusted IT Outsourcing partner in line with the needs of World's most prestigious firms and carried out successful projects worldwide. Scope: • Design, develop, and maintain AI-enabled applications and backend services using Java • Build and support scalable microservices-based architectures in cloud environments • Integrate AI tools, services, and models into enterprise applications and business workflows • Collaborate with engineering and product teams to deliver AI-driven solutions • Develop APIs and backend integrations for AI and cloud-based services • Participate in the design and implementation of cloud-native applications on GCP Skills: • Strong hands-on experience with Java development • Experience building microservices architectures and distributed systems • Practical experience working on AI-related projects or integrating AI tools/services • Interest and strong motivation to work with AI technologies and modern AI solutions • Experience with Google Cloud Platform (GCP) • Knowledge of REST APIs and backend integration patterns • Experience with containerization technologies such as Docker and Kubernetes is a plus • Familiarity with CI/CD pipelines and DevOps practices • Experience working in Agile environments Follow us on Linkedin! http://linkedin.com/company/snisourcing/

🏢 Summary: Senior Fullstack Engineer role focused on building modern, scalable web applications using React and Node.js, with strong emphasis on frontend development. The position covers the full application stack, including backend services, API design, and data management. You will collaborate with cross-functional teams to deliver high-quality, accessible, and high-performance digital products. 🗂️ Requirements: Strong commercial experience with React, Strong commercial experience with Node.js, Experience with React Router, Experience with TanStack Query, Experience integrating Headless CMS (preferably Contentful), Understanding of API design principles, Experience with PostgreSQL, Experience with Redis, Experience with Vitest, Experience with Playwright, Knowledge of WCAG accessibility standards, Experience with performance optimisation, Ability to work across full software development lifecycle 📃 Skills: React, Node.js, TypeScript, Fastify, PostgreSQL, Redis, React Router, TanStack Query, Contentful, Vitest, Playwright, WCAG, SAP Gigya, Salesforce 🏢 Description: Senior Fullstack Engineer (React & Node.js) About the Role We are looking for a Senior Fullstack Engineer to join a product team building modern, scalable web applications and digital experiences. You will work across the entire application stack, from user-facing interfaces to backend services and integrations. The role has a strong focus on frontend engineering while also involving backend development, API design, and data management. You will collaborate closely with product, design, and engineering teams to deliver high-quality, accessible, and performant applications. Responsibilities Develop and maintain modern web applications using React, Node.js, and TypeScript. Build scalable and reusable UI components integrated with a design system. Develop and maintain backend services and APIs using Node.js and Fastify. Integrate applications with CMS platforms and third-party services. Work with PostgreSQL and Redis to support application functionality and performance. Write and maintain automated tests, including unit and end-to-end tests. Ensure high standards of accessibility, performance, and code quality. Participate in architectural discussions and contribute to engineering best practices. Requirements Strong commercial experience in fullstack development using React and Node.js. Solid experience with modern frontend technologies, including React Router and TanStack Query. Experience integrating with Headless CMS platforms, preferably Contentful. Good understanding of API design and backend development principles. Experience with PostgreSQL and Redis. Experience with automated testing frameworks such as Vitest and Playwright. Strong understanding of accessibility standards (WCAG) and performance optimisation. Ability to work across the entire software development lifecycle in a product-oriented environment. Nice to Have Experience with authentication and identity platforms such as SAP Gigya. Experience integrating Salesforce products or loyalty platforms. Experience in highly scalable, customer-facing digital products. Experience working in agile, cross-functional product teams.

🏢 Summary: Senior-level role focused on building and maintaining scalable, data-driven web applications using React, TypeScript, Node.js, NestJS, and MSSQL. The position involves full-stack development, database design, data aggregation, and ensuring high performance and code quality. It also includes technical leadership, code reviews, and collaboration within cross-functional teams. 🗂️ Requirements: Bachelor’s degree in Computer Science or related field or equivalent experience, 5+ years of software development experience, Strong experience with React and TypeScript, Strong experience with Node.js and NestJS, Experience with MSSQL database design and optimization, Experience building data-driven applications and data aggregations, Knowledge of RESTful APIs, Understanding of microservices architecture, Experience with Git version control, Experience writing unit tests 📃 Skills: React, TypeScript, Node.js, NestJS, MSSQL, REST, Microservices, Git, Azure, Terraform, Databricks, Jenkins 🏢 Description: As a Senior React and Node.js Developer, you will leverage your expertise in React , TypeScript , NestJS , Node.js , and MSSQL to build scalable and efficient applications. You will play a pivotal role in the design, development, and maintenance of our web applications, ensuring they are robust, user-friendly, and data-driven. Main Responsibilities: Develop user interfaces using React and TypeScript with a focus on performance and scalability. Build and maintain back-end services using Node.js and NestJS. Design and manage MSSQL databases, ensuring data integrity and performance optimization. Implement data aggregations to drive meaningful insights and analytics. Collaborate with cross-functional teams to define and implement application features and functionalities. Write unit tests to ensure code quality and maintainability. Conduct code reviews and provide leadership and mentorship to junior developers. Troubleshoot and resolve application issues to ensure optimal performance. Stay current with industry trends and technologies to continuously improve development processes. Key Requirements: Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience). 5+ years of experience in software development with a strong focus on React, TypeScript, NestJS, Node.js, and MSSQL. Proven experience in developing and managing data-driven applications, including data aggregations. Strong understanding of RESTful APIs and microservices architecture. Familiarity with version control systems (e.g., Git). Excellent problem-solving skills and attention to detail. Strong communication skills and ability to work collaboratively in a team-oriented environment. Demonstrated leadership experience in guiding and mentoring team members. Nice to Have: Experience with cloud platforms such as Azure. Familiarity with Infrastructure as Code tools like Terraform. Knowledge of Databricks for data analytics and processing. Experience with CI/CD tools, such as Jenkins. Other Details: This position offers flexibility in working arrangements, providing opportunities to work remotely. You will be part of an innovative team striving to enhance development processes and deliver high-quality software solutions.

🏢 Summary: Senior Fullstack TypeScript Engineer role in a fintech environment focused on building and maintaining scalable, secure full-stack applications with a backend emphasis (Node.js) and React frontend. The position involves system and API design, real-time components, testing, and production support, using modern engineering practices including AI-assisted development. It is a hands-on role centered on architecture quality, performance, and reliable delivery. 🗂️ Requirements: Strong experience with Node.js, TypeScript, JavaScript (ES6+), React, Experience building full-stack web applications, Solid understanding of REST APIs and authentication, Knowledge of scalable system design (stateless services, caching, queues, performance), Experience with relational databases (PostgreSQL or MySQL), Experience with unit, integration, and E2E testing, Understanding of performance optimisation and debugging, Ability to evaluate technical trade-offs and system design decisions, Experience using AI tools in development workflows with critical validation of outputs, Professional English proficiency 📃 Skills: TypeScript, Node.js, JavaScript, React, REST, PostgreSQL, MySQL, SQL, Testing, CI/CD, Authentication, Caching, Queues, AI, Git, HTML, CSS 🏢 Description: Senior Fullstack TypeScript Engineer – Fintech London / Remote | B2B | Competitive package Our client is a UK-based fintech company with 25+ years of experience delivering innovative solutions for repo and securities financing markets. Their platform connects major market participants and provides real-time services that enable efficient and accurate trading. We are looking for a Senior Fullstack TypeScript Engineer to join our client’s engineering team. This role has a strong backend focus (approximately 60% backend / 40% frontend) and involves working across both frontend and backend systems, contributing to scalable architecture, feature delivery, and engineering best practices. This is a hands-on, delivery-focused role with a strong emphasis on system design, quality, and modern engineering practices, including AI-assisted development workflows. Responsibilities Build and maintain Fullstack applications using TypeScript (Node.js + React) Design and implement features across frontend and backend systems Participate in API and system design discussions Contribute to decisions around REST APIs, authentication, and architecture patterns Build secure, scalable, and maintainable systems Work with real-time and event-driven components where applicable Write and maintain unit, integration, and end-to-end tests Support production systems and assist in incident resolution when needed Participate in code reviews and contribute to engineering standards Use AI-assisted tools (e.g., Cursor, GitHub Copilot) to improve productivity, debugging, testing, and refactoring, while critically validating outputs Requirements Strong experience with Node.js, TypeScript, JavaScript (ES6+), React Experience in building full-stack web applications Solid understanding of REST APIs, authentication, and API design Knowledge of scalable system design (stateless services, caching, queues, performance) Experience with relational databases (PostgreSQL / MySQL) Experience with testing (unit, integration, E2E) Understanding of performance optimisation and debugging Ability to evaluate technical trade-offs and system design decisions Experience working in agile, collaborative teams Strong communication and ownership mindset English – professional working proficiency AI & Engineering Mindset Comfortable using AI tools in daily development work Able to: validate AI-generated code for security, maintainability, and performance use AI for debugging, refactoring, and test generation critically assess outputs instead of blindly accepting suggestions Awareness of secure usage of AI tools and data handling practices Nice to have AWS / cloud experience Docker / Terraform Event-driven architecture GraphQL experience State management (Redux / Zustand) Tailwind / Styled Components Observability (logging, metrics) Load / performance testing Data visualization (D3.js)