Senior Backend Developer (C# or Node.js)

🏢 Summary: Senior Quality Engineer role focused on automated testing and quality assurance for backend and IoT solutions in cloud-based, microservices environments. The position involves backend validation, API and integration testing, and ensuring data consistency across distributed systems. Work includes collaboration within Agile teams and support of CI/CD-driven, containerized platforms. 🗂️ Requirements: Strong programming skills in C# or Node.js/JavaScript, Experience in backend testing and automated test development, Knowledge of microservices architecture, Practical experience testing REST APIs and backend integrations, Hands-on experience with Azure cloud environments, Experience with MSSQL and MongoDB databases, Familiarity with Docker, RabbitMQ, and Redis, Understanding of CI/CD pipelines and tools, Experience working in Agile/Scrum teams 📃 Skills: C#, .NET, Node.js, JavaScript, REST, Azure, Docker, RabbitMQ, Redis, MSSQL, MongoDB, CICD, AzureDevOps, Jenkins, Microservices, MQTT, xUnit, NUnit, Mocha, Jest 🏢 Description: Senior Quality Engineer | Backend & IoT Platforms We are looking for a Senior Quality Engineer to support testing and quality assurance activities for modern backend and IoT-based solutions running in cloud environments. This role combines automated testing, backend validation, and close cooperation with development teams working on distributed microservices architecture. Additional information Work mode: Fully remote or hybrid (Wrocław) Rate: 100–120 PLN/h Responsibilities Develop and maintain automated test solutions using C#/.NET or Node.js technologies. Verify and test REST APIs, backend integrations, and asynchronous communication flows. Analyze and validate data consistency across relational and NoSQL databases. Support testing processes within containerized and CI/CD-based environments. Collaborate with developers, analysts, and stakeholders to ensure software quality and delivery standards. Maintain technical documentation and track progress using Jira and Confluence. Requirements Strong programming skills in C# or Node.js/JavaScript combined with backend testing experience. Practical knowledge of microservices architecture, REST APIs, and cloud-based solutions. Hands-on experience with Azure environments and backend integration testing. Familiarity with Docker, RabbitMQ, and Redis. Experience working with MSSQL and MongoDB databases. Understanding of CI/CD pipelines and tools such as Azure DevOps or Jenkins. Experience working in Agile/Scrum teams. Nice to have ISTQB Advanced Technical Test Analyst certification. Familiarity with IoT communication protocols such as MQTT. Experience with testing frameworks including xUnit, NUnit, Mocha, or Jest. Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Senior Full Stack Engineer focused primarily on backend development in Node.js to build and maintain a scalable API layer. The role involves developing RESTful services, supporting React frontend integration, and contributing to IoT system architecture. Work includes ensuring high code quality, testing, and collaboration on modern distributed solutions. 🗂️ Requirements: Very good knowledge of Node.js, Very good knowledge of TypeScript, Commercial experience with React, Very good knowledge of JavaScript (ES6+), Experience designing and working with RESTful APIs 📃 Skills: Node.js, TypeScript, JavaScript, React, REST, NestJS, ExpressJS, PostgreSQL, MongoDB, Docker, Git, Redis, RabbitMQ, WebSockets, Jest, Mocha, Pactum, AWS, GCP, Azure, Linux 🏢 Description: We are looking for a Senior Full Stack Engineer – Backend (Node.js) Oriented to join a project focused on building an API layer. You will join a team developing modern, scalable services. Full Stack Engineer – Backend (Node.js) Oriented Type of cooperation: contracting via Antal Work mode: remote work Rate: PLN 150–160/h Responsibilities: Developing and maintaining backend applications using Node.js and TypeScript Co-developing and integrating frontend applications in React Designing and developing RESTful APIs used by web and mobile applications Collaborating on the design of IoT system architecture Maintaining high code quality and writing tests Key requirements: Very good knowledge of Node.js and TypeScript (must-have) Commercial experience working with React Very good knowledge of JavaScript (ES6+) Experience in designing and working with RESTful APIs Very good command of English (must-have) Additional requirements: Knowledge of backend frameworks (NestJS, ExpressJS, or similar) Experience with PostgreSQL and MongoDB databases Practical knowledge of Docker Advanced knowledge of Git Experience with Redis and RabbitMQ Knowledge of WebSockets Experience with testing tools (Jest, Mocha, Pactum, or similar) Knowledge of cloud platforms (AWS, GCP, or Azure) Knowledge of Linux systems Co zyskasz dzięki aplikacji na ofertę Antal? Gdy Twoja aplikacja zostanie rozpatrzona pozytywnie (zostaniesz zaproszony/a do procesu), otrzymasz wsparcie Konsultanta/Konsultantki, który/a utrzyma z Tobą stały kontakt (mailowo lub telefonicznie), pomoże Ci przygotować się do rozmowy rekrutacyjnej z przyszłym pracodawcą oraz zatroszczy się o jakość procesu rekrutacyjnego, w którym aktualnie bierzesz udział. Kim jesteśmy? Jesteśmy liderem rekrutacji specjalistów i menedżerów oraz doradztwa w obszarze HR. Marka obecna jest w 35 krajach, w Polsce działa od 1996 roku. Przez ten czas zbudowaliśmy wiele karier kandydatów, dzięki elastycznemu i kompleksowemu podejściu do wszystkich rekrutacji. Antal tworzy ponad 130 profesjonalnych konsultantów ds. rekrutacji, którzy są oni nie tylko skutecznymi rekruterami, ale także wykwalifikowanymi doradcami, specjalizującymi się zarówno w zakresie wybranego sektora, jak i stanowiska. Sprawdź inne aktualne oferty pracy na: https://antal.pl/dla-kandydata Zaobserwuj nasz profil na LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Hybrid Backend Engineer role focused on designing and building scalable, fault-tolerant backend systems within a microservices and event-driven architecture. The position involves developing secure, production-ready APIs, contributing to modern cloud-native infrastructure, and ensuring high code quality and best practices. You will also support architectural evolution and deliver end-to-end business solutions in a DevOps-driven environment. 🗂️ Requirements: Strong experience with Java 8+, Proficiency in Spring Framework, Spring Boot, Spring Cloud, Hands-on experience with Kubernetes and Docker, Experience with public cloud platforms, Knowledge of Microservices Architecture, Knowledge of Event-Driven Architecture, Experience designing REST and GraphQL APIs, Experience with SQL and NoSQL databases, Experience with messaging systems, Understanding of security mechanisms (JWT, OAuth, TLS), Experience with CI/CD pipelines and DevOps tools, Knowledge of design patterns and scalable system design, Ability to deliver end-to-end backend applications 📃 Skills: Java, Spring, SpringBoot, SpringCloud, Kubernetes, Docker, REST, GraphQL, SQL, NoSQL, Oracle, PostgreSQL, MySQL, MongoDB, Cassandra, Kafka, RabbitMQ, IBMMQ, JWT, OAuth, TLS, Jenkins, GitLab, Microservices, CI/CD, Cloud 🏢 Description: Backend Engineer (Hybrid – 2 days/week in the office) We are looking for an experienced Backend Engineer to join a high-performing engineering team. In this role, you will be responsible for building scalable, high-quality backend systems and contributing to modern architecture initiatives. Responsibilities Design and develop highly scalable, performant, and fault-tolerant applications Contribute to the evolution of Microservices and Event-Driven Architecture Collaborate with Solution Architects and Tech Leads to translate technical designs into production-ready solutions Design systems with a strong focus on security, infrastructure, and data governance standards Contribute to system and API design, ensuring modularity and maintainability Ensure coding standards and promote best practices in development, testing, and documentation Mentor junior engineers, conduct code reviews, and provide technical leadership Ensure compliance with relevant controls, standards, and service management practices Deliver high-quality solutions on time, aligned with business expectations Support team engagement, ownership, and a sustainable, high-quality delivery pace Requirements Strong experience with Java 8+ , Spring Framework , Spring Boot , Spring Cloud Hands-on experience with Kubernetes , Docker , databases, and public cloud platforms Deep understanding of Microservices Architecture and Event-Driven Architecture Strong knowledge of design patterns and principles (focus on scalability and maintainability) Expertise in designing and developing APIs ( REST , GraphQL ) Experience with both SQL and NoSQL databases (e.g. Oracle, PostgreSQL, MySQL, MongoDB, Cassandra) Experience with messaging/middleware technologies (e.g. Kafka, IBM MQ, RabbitMQ) Understanding of security mechanisms (JWT, OAuth, TLS, authentication & authorization) Experience with DevOps tools and CI/CD pipelines (e.g. Jenkins, GitLab, Kubernetes, Docker) Proven experience in technical leadership and working with cross-functional teams Ability to deliver end-to-end business applications with high quality and low maintenance overhead Basic understanding of frontend-backend integration Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Senior Full Stack Engineer role focused on building and scaling a global cloud-based platform using Node.js and TypeScript. The position involves designing scalable microservices, event-driven systems, and modern React/Next.js applications handling large volumes of real-time data. The engineer will contribute to architecture, API design, and system reliability across distributed systems. 🗂️ Requirements: 5+ years of software engineering experience, Strong expertise in Node.js, Strong expertise in TypeScript, Experience with event-driven architectures, Advanced knowledge of asynchronous programming, Experience designing and maintaining complex APIs, Strong experience with React and Next.js, Hands-on experience with automated testing frameworks, Experience with SQL and/or NoSQL databases, Familiarity with Elasticsearch or OpenSearch 📃 Skills: Node.js, TypeScript, React, Next.js, Kafka, RabbitMQ, SQL, NoSQL, Elasticsearch, OpenSearch, Jest, Vitest, Playwright, Microservices, APIs, EventDriven, Asynchronous, Testing, Architecture 🏢 Description: Senior Full Stack Engineer (Node.js & TypeScript) About the Role We are looking for a Senior Full Stack Engineer to join a team building and scaling a global cloud-based platform. In this role, you will work on both backend services and modern web applications, helping to design highly scalable systems that process large volumes of real-time data while delivering seamless user experiences. Responsibilities System Architecture Design and develop scalable microservices using Node.js and TypeScript. Ensure high availability, reliability, and low latency across distributed systems. Contribute to architectural decisions and long-term platform scalability. Backend Development & Event-Driven Systems Build and optimize event-driven and asynchronous workflows. Work with messaging technologies such as Kafka or RabbitMQ. Design solutions capable of handling large-scale real-time data processing. API Design Own the design and evolution of APIs. Create high-performance, type-safe interfaces connecting multiple services and applications. Promote best practices around API versioning and contract-driven development. Frontend Development Develop modern web applications using React and Next.js. Focus on performance, maintainability, and excellent user experience. Implement efficient state management solutions and responsive interfaces. Quality & Reliability Design and maintain comprehensive testing strategies, including Unit, Integration, and End-to-End testing. Work with tools such as Jest, Vitest, and Playwright. Contribute to a culture focused on code quality and system reliability. Requirements 5+ years of experience in software engineering. Strong expertise in Node.js and TypeScript. Experience designing and implementing event-driven architectures. Advanced knowledge of asynchronous programming patterns. Proven experience designing and maintaining complex APIs. Strong frontend development skills with React and Next.js. Hands-on experience with automated testing frameworks. Experience with SQL and/or NoSQL databases. Familiarity with search technologies such as Elasticsearch or OpenSearch. Professional-level English communication skills. Ability to collaborate across teams and support technical decision-making. Nice to Have Interest or experience in AI-related projects. Knowledge of vector databases. Experience building services in Python. What’s Offered Opportunity to work on large-scale, modern cloud solutions. Influence on architecture and technical direction. Collaborative engineering culture with knowledge-sharing initiatives. Stable employment in an international environment. Flexible working hours and hybrid work model. Comprehensive benefits package, including private healthcare, sports card, insurance options, and additional employee perks. Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Hybrid Front-End / Fullstack Engineer role focused on building and maintaining modern web applications using Angular and Node.js for large-scale, business-critical projects in the financial services domain. The position involves working in an international team within a disciplined, quality-driven engineering environment. Responsibilities include development, code quality assurance, and contribution to CI/CD processes. 🗂️ Requirements: Strong experience with JavaScript, Strong experience with TypeScript, Hands-on experience with Angular, Experience with Node.js, Experience with NestJS, Very good knowledge of HTML5, Very good knowledge of CSS3, Very good knowledge of SCSS, Familiarity with CI/CD processes, Solid understanding of front-end best practices 📃 Skills: JavaScript, TypeScript, Angular, Node.js, NestJS, HTML5, CSS3, SCSS, CI/CD 🏢 Description: Front-End / Fullstack Engineer (JavaScript / TypeScript) Hybrid work model – 2 days per week from the office in Kraków We are looking for a Front-End / Fullstack Engineer with strong experience in JavaScript and TypeScript , who is comfortable working across both front-end and back-end technologies. The ideal candidate has hands-on experience with Angular and Node.js and enjoys collaborating with a strong, international team of engineers to build applications for a large-scale, business-critical initiative within the financial services domain. While solid technical foundations are essential, we are primarily looking for passionate engineers who are eager to continuously improve, challenge themselves, and work in a highly disciplined, verifiable, and quality-driven engineering environment . Your Responsibilities Design, develop, and maintain modern web applications using Angular and Node.js Collaborate closely with engineers, product owners, and stakeholders in an international environment Apply best practices in front-end development, ensuring high code quality and maintainability Contribute to CI/CD pipelines and development automation Actively participate in code reviews, technical discussions, and continuous improvement initiatives Core Skills & Requirements Strong experience with JavaScript and TypeScript Solid understanding of front-end best practices Hands-on experience with Angular Experience with Node.js and NestJS Very good knowledge of HTML5, CSS3, SCSS Familiarity with CI/CD processes Ability to work in a structured, disciplined engineering environment Strong communication skills and ability to work in an international team Nice to Have Experience with the ELK stack Experience using Ag-Grid Exposure to Google Cloud Platform or Alibaba Cloud Basic knowledge of or interest in Machine Learning What We Value Passion for clean, maintainable, and verifiable code Willingness to learn and continuously improve technical skills Ownership, accountability, and a proactive engineering mindset Team-oriented attitude and openness to feedback Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Contract role for a Fullstack Developer to build and scale backend APIs and frontend applications for a Carrier IoT solution. The position focuses on developing RESTful services in Node.js and TypeScript and contributing to React-based web applications. You will help design system architecture and ensure high code quality in a modern, cloud-enabled environment. 🗂️ Requirements: Strong knowledge of Node.js, Strong knowledge of TypeScript, Commercial experience with React, Strong knowledge of JavaScript ES6, Experience designing REST APIs, Experience with PostgreSQL, Experience with MongoDB, Practical knowledge of Docker, Advanced knowledge of Git, Experience with Redis, Experience with RabbitMQ, Knowledge of WebSockets, Experience with automated testing, Knowledge of cloud platforms, Knowledge of Linux systems 📃 Skills: Node.js, TypeScript, React, JavaScript, ES6, REST, NestJS, ExpressJS, PostgreSQL, MongoDB, Docker, Git, Redis, RabbitMQ, WebSockets, Jest, Mocha, Pactum, AWS, GCP, Azure, Linux, IoT, API 🏢 Description: Fullstack Developer (Node.js / TypeScript / React) – Projekt IoT Szukamy doświadczonej osoby do pracy przy projekcie związanym z budową warstwy API dla rozwiązania Carrier IoT. Dołączysz do zespołu tworzącego nowoczesne, skalowalne usługi. Kluczowe znaczenie w tej roli ma bardzo dobra znajomość Node.js, TypeScript oraz React. Forma współpracy: contracting via Antal Tryb pracy: praca zdalna Stawka: 140 - 160 zł/h Zakres obowiązków: Tworzenie i rozwój aplikacji backendowych w oparciu o Node.js i TypeScript Współtworzenie oraz integracja aplikacji frontendowych w React Projektowanie i rozwój RESTful API wykorzystywanych przez aplikacje webowe i mobilne Współpraca przy projektowaniu architektury systemu IoT Utrzymanie wysokiej jakości kodu oraz tworzenie testów Wymagania (kluczowe): Bardzo dobra znajomość Node.js oraz TypeScript (warunek konieczny) Komercyjne doświadczenie w pracy z React Bardzo dobra znajomość JavaScript (ES6+) Doświadczenie w projektowaniu i korzystaniu z RESTful API Dodatkowe wymagania: Znajomość frameworków backendowych (NestJS, ExpressJS lub podobne) Doświadczenie z bazami danych PostgreSQL oraz MongoDB Praktyczna znajomość Dockera Zaawansowana znajomość Git Doświadczenie z Redis oraz RabbitMQ Znajomość WebSockets Doświadczenie z testami (Jest, Mocha, Pactum lub podobne) Znajomość chmury (AWS, GCP lub Azure) Znajomość systemów Linux Bardzo dobra znajomość języka angielskiego Co zyskasz dzięki aplikacji na ofertę Antal? Gdy Twoja aplikacja zostanie rozpatrzona pozytywnie (zostaniesz zaproszony/a do procesu), otrzymasz wsparcie Konsultanta/Konsultantki, który/a utrzyma z Tobą stały kontakt (mailowo lub telefonicznie), pomoże Ci przygotować się do rozmowy rekrutacyjnej z przyszłym pracodawcą oraz zatroszczy się o jakość procesu rekrutacyjnego, w którym aktualnie bierzesz udział. Kim jesteśmy? Jesteśmy liderem rekrutacji specjalistów i menedżerów oraz doradztwa w obszarze HR. Marka obecna jest w 35 krajach, w Polsce działa od 1996 roku. Przez ten czas zbudowaliśmy wiele karier kandydatów, dzięki elastycznemu i kompleksowemu podejściu do wszystkich rekrutacji. Antal tworzy ponad 130 profesjonalnych konsultantów ds. rekrutacji, którzy są oni nie tylko skutecznymi rekruterami, ale także wykwalifikowanymi doradcami, specjalizującymi się zarówno w zakresie wybranego sektora, jak i stanowiska. Sprawdź inne aktualne oferty pracy na: https://antal.pl/dla-kandydata Zaobserwuj nasz profil na LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Opportunity for a Senior Full Stack Engineer to design and develop scalable .NET and React-based applications supporting DevOps analytics products. The role involves leading UI enhancements, contributing to architecture decisions, and building secure backend services within a CI/CD-driven environment. Position requires hybrid work with regular presence in the Kraków office. 🗂️ Requirements: Minimum 7 years experience in .NET development, Strong experience with C# and Web API, Hands-on experience with React, Experience building scalable and secure backend services, Strong SQL Server and advanced T-SQL skills, Experience with CI/CD and DevOps practices, Understanding of SDLC, Knowledge of HTML5 and CSS, Experience in responsive UI development 📃 Skills: .NET, C#, WebAPI, React, SQL, T-SQL, SQLServer, CI/CD, DevOps, HTML5, CSS, SDLC 🏢 Description: Senior Full Stack Engineer (.NET + React) B2B | 6 days per month from Kraków office We have a unique opportunity for you to join  team, which delivers metrics and analytical products that drive DevOps transformation across the bank. We provide key performance measures for engineering teams worldwide, along with critical insights that leadership relies on to shape and execute strategic initiatives. As we continue to evolve, we are looking for a Senior Full Stack Engineer (.NET + React) to join us in the next stage of our journey. 🚀 Responsibilities Participate in software architecture design Lead UI changes and improvements to enhance UX and application stability Implement solutions following best design patterns Analyze requirements to fully understand solutions and recommend improvements Create clear and comprehensive technical documentation Develop prototypes to validate concepts and designs Manage changes across the Service Management lifecycle Actively contribute to automation and continuous improvement of Service Management processes Provide high-quality customer support by resolving issues promptly Communicate effectively with stakeholders to understand needs and deliver solutions 🛠 Requirements Minimum 7 years of professional experience in .NET application development, including frontend (preferably React) Strong expertise in C# and Web API development Proven ability to build scalable, secure, and efficient backend services Hands-on experience with React , building dynamic and high-performance web applications Strong database design skills and experience with SQL Server (advanced T-SQL, optimization, performance tuning) Experience with DevOps practices (CI/CD) Solid understanding of the Software Development Life Cycle (SDLC) Good knowledge of HTML5, CSS , and responsive UI development Excellent problem-solving skills and attention to detail 🌍 What we offer Opportunity to influence DevOps transformation in a global organization Work with large-scale data and analytics solutions Collaboration with international teams Ability to shape architecture and engineering standards Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams.

🏢 Summary: Senior Full Stack Engineer role focused on building and evolving analytics and metrics platforms supporting DevOps transformation. The position involves designing architecture, developing scalable backend services in .NET, and delivering high-performance React-based UIs. The engineer will contribute to CI/CD practices, service management improvements, and technical documentation in a global environment. 🗂️ Requirements: Minimum 7 years of experience in .NET development, Strong expertise in C#, Experience with Web API development, Hands-on experience with React, Ability to build scalable and secure backend services, Strong SQL Server and database design skills, Advanced T-SQL knowledge, Experience with CI/CD practices, Understanding of SDLC, Knowledge of HTML5 and CSS, Experience with responsive UI development 📃 Skills: .NET, C#, WebAPI, React, SQL, SQLServer, T-SQL, CI/CD, HTML5, CSS, SDLC, DevOps 🏢 Description: Senior Full Stack Engineer (.NET + React) B2B | 6 days per month from Kraków office We have a unique opportunity for you to join  team, which delivers metrics and analytical products that drive DevOps transformation across the bank. We provide key performance measures for engineering teams worldwide, along with critical insights that leadership relies on to shape and execute strategic initiatives. As we continue to evolve, we are looking for a Senior Full Stack Engineer (.NET + React) to join us in the next stage of our journey. 🚀 Responsibilities Participate in software architecture design Lead UI changes and improvements to enhance UX and application stability Implement solutions following best design patterns Analyze requirements to fully understand solutions and recommend improvements Create clear and comprehensive technical documentation Develop prototypes to validate concepts and designs Manage changes across the Service Management lifecycle Actively contribute to automation and continuous improvement of Service Management processes Provide high-quality customer support by resolving issues promptly Communicate effectively with stakeholders to understand needs and deliver solutions 🛠 Requirements Minimum 7 years of professional experience in .NET application development, including frontend (preferably React) Strong expertise in C# and Web API development Proven ability to build scalable, secure, and efficient backend services Hands-on experience with React , building dynamic and high-performance web applications Strong database design skills and experience with SQL Server (advanced T-SQL, optimization, performance tuning) Experience with DevOps practices (CI/CD) Solid understanding of the Software Development Life Cycle (SDLC) Good knowledge of HTML5, CSS , and responsive UI development Excellent problem-solving skills and attention to detail 🌍 What we offer Opportunity to influence DevOps transformation in a global organization Work with large-scale data and analytics solutions Collaboration with international teams Ability to shape architecture and engineering standards Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams.

🏢 Summary: Senior Full Stack Developer role in an international agile team delivering digital solutions for used assets remarketing. The position involves designing, developing, and maintaining scalable and secure backend and frontend applications while contributing to technical decisions and code quality. The role also includes collaboration in a cross-functional environment and mentoring junior developers. 🗂️ Requirements: 5+ years of full stack development experience, Proficiency in Java, JavaScript, and Python, Experience with Spring Boot and Angular, Hands-on experience with REST and SOAP APIs, Experience with Oracle and MongoDB databases, Knowledge of messaging systems such as Kafka or ActiveMQ, Experience with CI/CD tools and build automation, Proficiency with Docker and Kubernetes, Experience working in Agile environments, Fluent English 📃 Skills: Java, JavaScript, Python, SpringBoot, Angular, Oracle, MongoDB, Elasticsearch, SOLR, REST, SOAP, Kafka, ActiveMQ, Maven, Jenkins, GitLabCI, Git, Docker, Kubernetes, Tomcat, Nginx, IntelliJ, Eclipse, VSCode, Jira, Confluence 🏢 Description: Senior Full Stack Developer Location: Warsaw (hybrid 50/50) Experience: 5+ years Language: English (required) Role Overview We are looking for a Senior Full Stack Developer to join an international agile team delivering digital solutions supporting used assets remarketing. The role involves designing, developing, and maintaining scalable and secure applications, working closely with product owners, designers, and other engineers in a cross-functional setup. You will contribute to both backend and frontend development, participate in technical decision-making, review code, and support continuous improvement of existing systems. Responsibilities Design and develop backend services and APIs Build and maintain frontend applications Improve and refactor existing solutions Participate in code reviews and agile ceremonies Collaborate with cross-functional teams Support technical documentation and application maintenance Mentor junior developers when needed Required Tech Stack Languages: Java, JavaScript, Python Frameworks: Spring Boot, Angular Databases: Oracle, MongoDB, Elasticsearch / SOLR APIs: REST, SOAP Messaging: Kafka, ActiveMQ CI/CD & Build: Maven, Jenkins, GitLab CI Version Control: Git Containers & Cloud: Docker, Kubernetes Servers & Tools: Tomcat, Nginx IDEs: IntelliJ IDEA, Eclipse, VS Code Agile & DevOps tools: Jira, Confluence Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams.

🏢 Summary: Hybrid Web Development Engineer role focused on building and maintaining large-scale, business-critical web platforms in an international Agile/DevOps environment. The position covers full development lifecycle, from translating business requirements into scalable technical solutions to supporting production deployments. It involves backend-heavy development with modern .NET technologies and collaboration across cross-functional teams. 🗂️ Requirements: Minimum 5 years backend web development experience, .NET / C# / ASP.NET proficiency, Strong object-oriented programming knowledge, Experience with .NET Core, Experience with MS SQL Server, Experience with IIS, Frontend knowledge (HTML, CSS/SCSS, JavaScript, TypeScript), Experience with React, Experience in Agile teams, Experience in DevOps environments, Understanding of secure coding practices, Familiarity with build tools (npm), English proficiency (written and spoken) 📃 Skills: .NET, C#, ASP.NET, .NETCore, MSSQL, IIS, HTML, CSS, SCSS, JavaScript, TypeScript, React, Next.js, Agile, DevOps, CI/CD, npm, Azure, VSTS, Sitecore 🏢 Description: About the role Hybrid working model ( 2 days per week from the office in Cracow ) We are looking for an experienced Web Development Engineer to join an international technology team working on large-scale, business-critical web platforms. This role offers the opportunity to contribute to the development and maintenance of modern web applications used globally, while collaborating with cross-functional teams in a dynamic environment. You will be involved in the full development lifecycle — from understanding business requirements to delivering high-quality, scalable solutions and supporting production environments. Key responsibilities Develop new features and enhance existing functionalities in web applications Identify and fix bugs, ensuring high-quality and stable code Participate in code reviews and promote best development practices Translate business requirements into technical solutions Collaborate with stakeholders to define and refine user stories Contribute to technical design, documentation, and implementation Support production deployments and ongoing maintenance Work in an Agile, DevOps-oriented environment following CI/CD practices Requirements Minimum 5 years of experience in backend web development (preferably .NET / C# / ASP.NET ) Strong understanding of object-oriented programming and clean code principles Hands-on experience with: .NET Core MS SQL Server IIS Frontend knowledge: HTML, CSS (SCSS), JavaScript, TypeScript Experience with React (Next.js is a plus) Experience working in Agile teams and DevOps environments Understanding of secure coding practices and secure-by-design approach Familiarity with modern build tools (npm, etc.) Strong problem-solving skills and ability to work independently Good command of English (written and spoken) Nice to have Experience with Sitecore CMS or other enterprise CMS platforms Familiarity with Microsoft Azure Experience with CI/CD tools (e.g. VSTS / Azure DevOps) Knowledge of cross-browser and cross-platform development practices What we offer Opportunity to work on large-scale, high-impact web platforms International, collaborative working environment Exposure to modern technologies and development practices Continuous learning and professional development Hybrid working model ( 2 days per week from the office in Cracow ) Friendly and supportive team culture Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland