Full Stack Developer

🏢 Summary: B2B contract for an experienced Frontend Developer to work 100% remotely on a long-term strategic technology project involving modern IT solutions, including generative AI. The role focuses on building high-quality frontend applications that support key business processes in an international Agile environment. 🗂️ Requirements: Minimum 5 years of experience as Frontend Developer, Minimum 5 years of commercial experience with React, Minimum 5 years of commercial experience with JavaScript, Experience working in Linux environment, Practical experience with Jira, Practical experience with GitLab, Practical experience with OpenShift, Experience with CI/CD processes, Knowledge of DevOps practices, Experience with unit testing and system testing, Experience working in Agile (Scrum) methodology 📃 Skills: React, JavaScript, Linux, Jira, GitLab, OpenShift, CI/CD, DevOps, Scrum, Agile, Testing 🏢 Description: Hays IT Contracting to współpraca oparta na zasadach B2B. Nasza firma dopasowuje specjalistów IT do najciekawszych projektów technologicznych na rynku. Dołącz do grona 500 zadowolonych Kontaktorów i pracuj dla Klientów Hays! Obecnie dla naszego Klienta poszukujemy osoby na stanowisko: Frontend Developer Lokalizacja: Zdalnie 100% Godziny pracy: standardowe Rodzaj umowy: B2B Stawka: 140 - 165 PLN/h net + vat Czas trwania projektu: współpraca długofalowa Start: ASAP O projekcie Dołącz do zespołu rozwijającego strategiczny projekt technologiczny z obszaru nowoczesnych rozwiązań IT, w tym generatywnej AI. Będziesz pracować nad tworzeniem wysokiej jakości oprogramowania wspierającego kluczowe procesy biznesowe, w dynamicznym i międzynarodowym środowisku. Twoja rola Jako Software Engineer będziesz odpowiedzialny/a za rozwój i dostarczanie nowoczesnych rozwiązań frontendowych, współpracując bezpośrednio z zespołami biznesowymi, developerami oraz ekspertami DevOps i Data Science. Zakres obowiązków Rozwijanie oprogramowania w metodyce Agile (Scrum) Implementacja funkcjonalności w oparciu o React i JavaScript Przeprowadzanie testów jednostkowych i systemowych Współpraca z biznesem w zakresie analizy i doprecyzowania wymagań Udział w procesach CI/CD oraz wdrożeniach (DevOps) Dbanie o wysoką jakość doświadczenia użytkownika (UX) Rozwiązywanie problemów produkcyjnych i optymalizacja aplikacji Wymagania Min. 5 lat doświadczenia na stanowisku Frontend Developera Bardzo dobra znajomość React i JavaScript (min 5 lat doświadczenia) Doświadczenie w pracy w środowisku Linux Praktyczna znajomość narzędzi: Jira, GitLab, OpenShift Znajomość procesów CI/CD i praktyk DevOps Umiejętność przeprowadzania testów (unit/system testing) Bardzo dobra znajomość języka angielskiego (min. B2+/C1) Wykształcenie wyższe lub doświadczenie równoważne Mile widziane Doświadczenie z danymi finansowymi (Market Data, Reference Data) Znajomość full-stack development Doświadczenie w projektach związanych z AI Kompetencje miękkie Umiejętność analitycznego myślenia i rozwiązywania problemów Samodzielność i inicjatywa Umiejętność pracy zespołowej (Scrum) Dobra komunikacja z interesariuszami biznesowymi Jak będzie wyglądał proces rekrutacji: Twoje CV zostanie zweryfikowane przez rekrutera Hays Rekruter skontaktuje się z Tobą telefonicznie – 15-minutowa rozmowa o projekcie i Twoim doświadczeniu Rozmowa techniczna z klientem Oferta Witamy w projekcie! Hays Poland sp. z o.o. jest agencją zatrudnienia zarejestrowaną w rejestrze prowadzonym przez Marszałka Województwa Mazowieckiego pod numerem 361

🏢 Summary: Long-term B2B contract for a Senior Java Developer to build and operate cloud-native microservices on OpenShift. The role combines backend development with DevOps responsibilities, including CI/CD automation, containerization, observability, and DevSecOps practices in a fully remote environment. 🗂️ Requirements: Strong experience with Java and Spring Boot, Hands-on experience with OpenShift, Practical knowledge of containerization, Experience building CI/CD pipelines with Tekton, Knowledge of Maven or Gradle, Experience with GitOps and Argo CD, Familiarity with observability tools, Understanding of DevSecOps practices, Scripting skills for automation, Experience troubleshooting JVM in containerized environments 📃 Skills: Java, Spring, OpenShift, Docker, S2I, Kafka, AMQ, Tekton, Maven, Gradle, ArgoCD, Prometheus, Grafana, Loki, EFK, Bash, PowerShell, Python, Helm, Kustomize, Trivy, Clair, Snyk, RBAC, JVM, GitOps 🏢 Description: Hays IT Contracting is a cooperation based on B2B rules. We connect IT specialists with the most interesting, technological projects on the market. Join the group of 500 satisfied Contractors working for Hays’ clients! For our Client we are currently looking for Candidates for the position of: Senior Java Developer Job type: B2B (with Hays Poland) Location: 100% remote Length: long term project Start date: ASAP / 1 month notice period is ok Rate: 170-180zł/h We’re looking for a Java Developer with strong DevOps skills and hands on experience running workloads on Red Hat OpenShift. You will build Java microservices, automate delivery pipelines, and help maintain reliable, secure, and observable cloud native platforms Key Responsibilities: ·       Develop and maintain Java microservices (Spring Boot) integrating with databases, APIs, and Kafka/AMQ. ·       Containerize applications (Docker/S2I) and optimize images for performance and security. ·       Deploy and operate services on OpenShift (deployments, routes, services, config/secrets, operators). ·       Build CI/CD using Tekton and manage GitOps flows via Argo CD. ·       Implement observability: logs, metrics, alerts (Prometheus, Grafana, Loki/EFK). ·       Automate tasks using Bash, PowerShell, Python, oc CLI, Helm/Kustomize. ·       Apply DevSecOps practices: image & dependency scanning (Trivy, Clair, Snyk), RBAC, secure coding. ·       Tune JVM and troubleshoot performance issues in containerized workloads. Must Have Skills ·       Strong Java & Spring Boot experience. ·       Practical experience with OpenShift and containerization. ·       CI/CD knowledge (Tekton, Maven/Gradle, GitOps/Argo CD). ·       Familiarity with observability tools and cloud native troubleshooting. ·       Understanding of DevSecOps and automation scripting. Nice to Have Java Certifications: ·       Oracle Certified Professional (OCP) – Java SE 11 or 17 ·       Oracle Certified Associate (OCA) – Java SE Cloud Native & Container Certifications: ·       Red Hat OpenShift Developer (DO288) ·       Red Hat Certified Specialist in OpenShift Administration (EX280) ·       Kubernetes certifications: CKA / CKAD / CKS What will you get: ·       Long-term cooperation with the client implementing projects for the largest players in the banking, insurance, telco and more sectors ·       Fast recruitment process - one meeting ·       Standard benefits - preferential rates for LuxMed and Multisport packages ·       When you choose to work via Hays, you also get the opportunity to work for many of Hays' other leading clients in the future What will the recruitment process look like: 1.     Your CV will be verified by Hays Recruiter 2.     Recruiter will contact you by phone - a 15-minute conversation about the project and your experience 3.     2 stages of interview with Client, via Teams 4.     Offer 5.     Welcome to the project! Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361.

🏢 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: Senior React Developer role focused on building and maintaining modern, scalable web applications in a large international banking environment. The position involves developing high-quality, responsive frontend solutions, ensuring code quality, and supporting production systems within an Agile team. Long-term B2B contract with hybrid work model in Kraków. 🗂️ Requirements: Proven experience delivering web applications, Strong experience building rich frontend/UI layers, Excellent knowledge of React.js, Excellent knowledge of JavaScript, Excellent knowledge of TypeScript, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with CSS preprocessors (SASS or Less), Experience with Jest, Experience with React Testing Library, Experience creating pixel-perfect UI from detailed specifications, Experience designing responsive interfaces for desktop and mobile, Understanding of accessibility standards, Understanding of cross-browser compatibility, Knowledge of JSON, Knowledge of XML 📃 Skills: React, JavaScript, TypeScript, HTML5, CSS3, SASS, Less, Jest, ReactTestingLibrary, JSON, XML 🏢 Description: Location: Kraków, Poland Work model: Hybrid, 6 days per month in the Kraków office Recruitment process: Test + 1-hour live coding interview in React Contract : B2B, long-term About the role We are looking for a Senior React Developer to join the Business Services Digital team . The team delivers IT solutions and support for Business Services within a large-scale, international banking environment. This is a great opportunity for an experienced frontend engineer who enjoys building high-quality digital products, working in Agile teams, and contributing to modern, scalable web applications in a complex enterprise setting. Your responsibilities Design, develop, test, and implement modern web-based applications Build rich, responsive, and pixel-perfect user interfaces using React Maintain a delivery-oriented approach across application development and supporting software/data infrastructure Manage software releases and support existing systems in production Ensure code quality, maintainability, and full test coverage Contribute to and promote frontend best practices and engineering standards Mentor other team members through knowledge sharing and technical guidance Deliver solutions on time and within budget Follow internal development methodologies, security standards, and documentation requirements Drive productivity and quality improvement initiatives Coordinate releases through to Production Required experience Proven track record in delivering web applications Strong experience building rich frontend/UI layers Excellent knowledge of React.js Excellent knowledge of JavaScript and TypeScript Strong knowledge of HTML5 , CSS3 , and CSS preprocessors such as SASS or Less Experience with frontend testing frameworks such as Jest and React Testing Library Experience creating pixel-perfect UI based on detailed specifications Experience designing responsive interfaces for desktop and mobile applications Good understanding of accessibility and cross-browser compatibility Good knowledge of data marshalling/de-marshalling using JSON and XML Nice to have Experience working with Git Familiarity with IntelliJ and VS Code Good understanding of responsive web techniques Knowledge of Node.js / Express Experience designing digital products in the onboarding or banking domain What makes this opportunity interesting Work on impactful digital solutions in a global banking environment Join a mature engineering team focused on quality, delivery, and best practices Contribute to modern frontend development using React and TypeScript Competitive B2B rate

🏢 Summary: Full-time Senior Full Stack Developer role focused on building scalable, data-driven platforms for financial and enterprise sectors using Node.js and React. The position involves designing microservices, developing RESTful APIs, and creating responsive front-end applications in a hybrid work model (Warsaw). 🗂️ Requirements: 5+ years experience as Senior Full Stack Developer, Strong expertise in Node.js, Strong expertise in React, Experience with Express.js, Experience building RESTful or GraphQL APIs, Knowledge of OAuth and JWT authentication, Proficiency in Redux, HTML5, CSS3, ES6+, Experience with Vite, Webpack or Babel, Experience with MySQL or PostgreSQL, Experience with AWS, Azure or GCP, Experience with Docker and Kubernetes, Proficiency with Git 📃 Skills: Node.js, React, Express.js, GraphQL, REST, OAuth, JWT, Redux, HTML5, CSS3, JavaScript, ES6, Vite, Webpack, Babel, MySQL, PostgreSQL, AWS, Azure, GCP, Docker, Kubernetes, Git, SQL, MongoDB, CI/CD 🏢 Description: Senior Full Stack Developer (Node.js + React) 💰 Salary: 23,000-24,800 PLN/Month 💻 Warsaw, Poland (Hybrid - 3 days in office, 2 days remote) 🕦 Full-time ☑️ B2B or CoE We’re looking for a Senior Full-Stack Developer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors. Requirements: 5+ years of experience as a Senior Full Stack Developer with significant expertise in Node.js and React. Strong experience in building server-side applications using Node.js and Express.js. Hands-on experience with API development and integration, particularly with GraphQL or RESTful services. Strong knowledge of authentication and authorization mechanisms (OAuth, JWT, session-based). Front-end proficiency in React.js, Redux, HTML5, CSS3, and modern JavaScript (ES6+). Familiarity with front-end build tools such as Vite, Webpack, and Babel. Strong experience with databases such as MySQL and  PostgreSQL. Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes. Strong experience using Git and version control systems. Proficiency in English (both written and spoken). Key Responsibilities: Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js. Develop and maintain interactive, responsive user interfaces using React.js, Redux, and modern JavaScript (ES6+). Lead the design and implementation of scalable architectures and microservices. Work closely with database engineers to design efficient schemas and manage data interactions using SQL databases or MongoDB. Ensure reliable deployments and smooth release of updates using CI/CD pipelines and Docker. Write unit and integration tests and optimize performance to ensure high-quality code. Collaborate closely with cross-functional teams to define and implement technical solutions. Improve system performance, reliability, and long-term maintainability through optimization and best practices. Get to know DevsData: We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team, including people from Asia, London, or San Francisco. We employ people with experience in international corporations as well as students of the best technical and business universities. Find out more: https://devsdata.com/

🏢 Summary: B2B contract for a Java Developer in a long-term banking project focused on modernizing an online banking payments system from legacy technology to a modern microservices architecture, supported by AI/LLM tools. The role involves system refactoring, staged migrations, and ensuring quality and security of AI-assisted development outputs. Hybrid or remote work with an initial 12-month contract. 🗂️ Requirements: Experience in banking systems, especially payments, Very good knowledge of Java, Very good knowledge of Spring Framework and Spring Boot, Experience with microservices architecture (design, integrations, observability, resilience), Experience with Oracle and PostgreSQL databases, Strong SQL skills (modeling and optimization), Documented experience in legacy code refactoring and system modernization, Knowledge of migration patterns (e.g., strangler pattern, staged migration), Experience in payments domain (transfers, standing orders, settlements, integrations), Practical experience with LLM and AI Agents in software development, Ability to validate and verify AI-generated code for correctness, security, and quality 📃 Skills: Java, Spring, SpringBoot, Microservices, Oracle, PostgreSQL, SQL, LLM, AI, REST, API 🏢 Description: Hays IT Contracting to współpraca oparta na zasadach B2B. Nasza firma dopasowuje specjalistów IT do najciekawszych projektów technologicznych na rynku. Dołącz do grona 500 zadowolonych Kontraktorów i pracuj dla Klientów Hays! Obecnie dla naszego Klienta poszukujemy Kandydatów na stanowisko: Java Developer Rodzaj umowy: kontrakt (B2B przez Hays Poland) Tryb pracy: Praca hybrydowa, 1 dzień z biura w Warszawie lub Krakowie lub Łodzi lub Wrocławiu / możliwa praca zdalna Czas trwania: współpraca długofalowa, pierwszy kontrakt na 12 miesięcy Start: ASAP Stawka: 140 - 160zł/h Opis projektu: Zespół projektowy odpowiedzialny za realizację przepisania (modernizacji) systemu bankowości internetowej z technologii typu legacy do nowej, zmodernizowanej architektury. Zakres modernizacji obejmuje obszar płatności. Realizacja projektu będzie wspierana przez Agentów AI / modele LLM, w związku z czym oczekujemy doświadczenia w pracy z tego typu narzędziami oraz wysokiej dojrzałości inżynierskiej w zakresie weryfikacji i walidacji rezultatów generowanych przez AI. Wymagania: Doświadczenie w bankowości (systemy płatności) Bardzo dobra znajomość: Java, Spring Framework (w tym Spring Boot) Doświadczenie w architekturze mikroserwisowej (projektowanie, integracje, obserwowalność, odporność) Bazy danych: Oracle oraz PostgreSQL (modelowanie, optymalizacja, praca z SQL) Udokumentowane doświadczenie w pracy z kodem legacy oraz modernizacji/przepisywaniu systemów (refaktoryzacja, strangler pattern, migracje etapowe, testy regresji) Doświadczenie w domenie: płatności (np. przelewy, zlecenia stałe, paczki, statusy, potwierdzenia, rozrachunek, integracje z systemami zewnętrznymi) Wymagania związane z AI/LLM: Praktyczne doświadczenie w wykorzystaniu LLM oraz Agentów AI w wytwarzaniu oprogramowania (np. generowanie kodu, testów, analiz, dokumentacji, migracji) Umiejętność krytycznej oceny rezultatów AI: weryfikacja poprawności, bezpieczeństwa, jakości, zgodności z wymaganiami i standardami Kompetencje miękkie do pracy w „AI-assisted development”: myślenie systemowe, krytyczne, nastawienie na jakość i szybkie uczenie, umiejętność współpracy i dzielenia się wiedzą Znajomość wzorców migracyjnych i modernizacyjnych (np. stopniowe wydzielanie domen, kontrakty API) Co otrzymasz: Długofalową współpracę z Klientem realizującym projekty dla największych graczy z sektora bankowego, ubezpieczeniowego, telco i nie tylko Możliwość pracy w elastycznych godzinach Błyskawiczny proces rekrutacyjny – jedno spotkanie, decyzja nawet w ciągu 1 dnia Standardowe benefity – preferencyjne stawki pakietów LuxMed i Multisport Decydując się na współpracę via Hays, otrzymujesz również możliwość pracy w przyszłości dla wielu innych wiodących klientów Hays Jak będzie wyglądał proces rekrutacyjny: 1.     Twoje CV trafi do weryfikacji przez Rekrutera Hays 2.     Rekruter skontaktuje się z Tobą telefonicznie – 15-minutowa rozmowa o projekcie i Twoim doświadczeniu 3.     Rozmowa techniczna z Klientem – 2 spotkania online (1h) 4.     Oferta 5.     Witamy w projekcie! Hays Poland sp. z o.o. jest agencją zatrudnienia zarejestrowaną w rejestrze prowadzonym przez Marszałka Województwa Mazowieckiego pod numerem 361

🏢 Summary: Senior Full-Stack Engineer role focused on designing and building scalable APIs and microservices that power music-related experiences across a global fitness platform. The position combines backend development in .NET with frontend collaboration in React/Vue, working on distributed systems and real-time features. It involves strong ownership, architectural influence, and delivering high-impact user-facing solutions at scale. 🗂️ 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, Experience with multithreading, Experience with NoSQL databases, Experience with MongoDB, Familiarity with microservices architecture, Working knowledge of React or Vue.js, Experience with CI/CD pipelines, Experience with automated testing, Understanding of DevOps principles, Understanding of Agile methodologies, Strong focus on code quality and scalability, Professional 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

🏢 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

🏢 Summary: Senior Full-Stack Engineer (.NET & React) role focused on building scalable APIs and microservices powering music-related experiences across a global fitness platform. The position involves designing distributed systems, supporting real-time music playback, and delivering high-impact user-facing features at scale. It is a hands-on role with strong ownership and cross-functional collaboration. 🗂️ Requirements: 5+ years of professional software development experience, Strong knowledge of C#, Strong knowledge of .NET ecosystem, Experience building and maintaining RESTful APIs, Experience with asynchronous programming, Experience with multithreading, Experience with NoSQL databases, Experience with MongoDB, Familiarity with microservices architecture, Working knowledge of React or Vue.js, Experience with CI/CD pipelines, Experience with automated testing, Understanding of DevOps principles, Understanding of Agile methodologies, English proficiency for technical communication 📃 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

🏢 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