🚀 Senior Fullstack Engineer (Java / Kotlin + React)

🏢 Summary: Długofalowa, zdalna współpraca dla Fullstack Engineera (Mid/Senior) z naciskiem na frontend, przy rozwoju ekosystemu narzędzi dla reklamodawców e-commerce. Rola obejmuje tworzenie mikrofrontendów i API dla dashboardów analitycznych oraz usług backendowych wspierających rekomendacje i automatyzację kampanii. Praca dotyczy skalowalnej, zdarzeniowej architektury chmurowej i obejmuje rotacyjne dyżury on-call. 🗂️ Requirements: TypeScript, React, HTML/CSS, Testy Jest, Vitest lub Playwright, Kotlin lub Java, Spring Boot, Relacyjne i nierelacyjne bazy danych, SQL, MongoDB, Mikrousługi, Ekosystem chmurowy, Praktyczne doświadczenie z narzędziami agentowymi do programowania, Język polski, Język angielski B2+ 📃 Skills: TypeScript, React, HTML, CSS, Jest, Vitest, Playwright, Kotlin, Java, SpringBoot, SQL, MongoDB, GCP, Copilot, OpenCode, OpenAI, Anthropic, Scala 🏢 Description: Model pracy: praca zdalna, z okazjonalnymi spotkaniami 1–2 razy na kwartał w Warszawie lub Krakowie. Czas trwania: współpraca długofalowa. Zakres obowiązków • Rozwój i budowa skalowalnych mikrofrontendów opartych na React dla dashboardów analitycznych, z uwzględnieniem SSR i dostępności (a11y). • Tworzenie wysokowydajnych interfejsów API zasilających dashboardy i benchmarki rynkowe. • Rozwój serwisów backendowych w Java/Kotlin i Spring Boot, generujących oraz serwujących spersonalizowane podpowiedzi dla użytkowników, we współpracy z zespołem Data Science. • Współpraca przy rozwoju rozproszonej architektury sterowanej zdarzeniami (event-driven), przetwarzającej duże wolumeny danych w chmurze. • Wykorzystanie nowoczesnych narzędzi AI, m.in. GitHub Copilot oraz rozwiązań OpenAI/Anthropic, w codziennym procesie tworzenia oprogramowania. • Udział w dyżurach technicznych i reagowaniu na incydenty — rotacyjny dyżur raz na około 1,5–2 miesiące. Oczekiwania • Bardzo dobra, praktyczna znajomość TypeScript, React, HTML/CSS oraz testów: Jest, Vitest lub Playwright. • Solidne podstawy i swoboda programowania w Kotlinie lub Javie oraz znajomość Spring Boot. • Dobra znajomość relacyjnych i nierelacyjnych baz danych, w tym SQL i MongoDB, a także zagadnień mikrousług oraz ekosystemu chmurowego; preferowane GCP. • Praktyczne doświadczenie i świadome używanie agentowych narzędzi wspierających pisanie kodu, takich jak Copilot i OpenCode. • Znajomość języka polskiego oraz języka angielskiego na poziomie minimum B2+. Mile widziane • Doświadczenie z mikrofrontendami, Server-Side Rendering (SSR) i dbałością o dostępność (a11y). • Znajomość Scali. Benefity • Dofinansowanie do opieki medycznej. • Ubezpieczenie na życie. • Karta sportowa dla pracownika i jego bliskich. • Zniżki do sklepów w Polsce i za granicą.

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

🏢 Summary: Senior Full-Stack Engineer role focused on building scalable ASP.NET/C# microservices and React/TypeScript interfaces, with a 60/40 frontend-to-backend split. The position offers technical ownership, mentoring opportunities, and a potential path to Tech Lead while working hybrid from Poland under an employment contract. 🗂️ Requirements: Poland residency, MSc in Computer Science or equivalent, 5+ years building secure REST APIs with ASP.NET, 5+ years developing frontend applications with React, Microservices architecture expertise, Cloud design-pattern knowledge, Technical ownership, Technical leadership, English B2 fluency 📃 Skills: ASP.NET, C#, React, TypeScript, REST, Microservices, Cloud, AWS, Agile, DDD 🏢 Description: We’re looking for a Senior Full-Stack Engineer who brings deep technical expertise and a collaborative mindset to the product development team. You will work with a modern microservices architecture, building scalable backend services using ASP.NET Web API with C#, and intuitive frontend interfaces mainly with React and TypeScript. This is a hands-on engineering role with a 60/40 frontend-to-backend focus, ideal for someone who likes to take ownership, thrives in a dynamic product team, and enjoys mentoring others. The role could develop into a Tech Lead position in the foreseeable future. Applicants must be located in Poland; the team meets in Poland for at least one week each quarter. The contract form is Umowa o Pracę only; B2B is not available. Quick Facts • Hands-on full-stack role with a 60/40 frontend-to-backend focus • Cloud-native, microservices-based product environment • Remote flexibility with quarterly in-person collaboration in Poland • Potential progression to Tech Lead • Employment through an Employer of Record provider, ensuring legal compliance in Poland Responsibilities • Collaborate proactively in refinement sessions with product and technical teams to ensure feature clarity and feasibility. • Design, implement, and maintain scalable web APIs using ASP.NET and microservices architecture principles. • Develop responsive user interfaces with React and TypeScript to improve usability and performance. • Work closely with Product Owners to clarify feature requirements and understand business context. • Define, design, and align feature architecture with the Head of Engineering to ensure consistency and scalability. • Ensure features meet the Definition of Done with unit, integration, and end-to-end test coverage. • Support incident response and production issue resolution according to team standards. • Share knowledge actively and coach colleagues in technical best practices. Essential Qualifications • MSc or higher in Computer Science, or equivalent. • At least 5 years of proven experience building secure REST APIs using ASP.NET. • At least 5 years of experience developing solid frontend applications with React. • Comprehensive knowledge of contemporary web application architectures, particularly microservices and cloud design patterns. • Demonstrated technical ownership and technical leadership. • English at B2 level or higher, with fluent communication; no certificate required. Preferred Qualifications • Hands-on experience with AWS infrastructure. • Experience in cross-functional product teams using Agile practices and Domain-Driven Design (DDD). • Polish and German language skills. What You Can Expect • A dynamic, ambitious team where contributions and ideas matter. • Ownership over decisions in a trusted, cross-functional environment. • Fair compensation, flexible working hours, and a hybrid work setup. • Support for personal and professional growth and a healthy work-life balance. Candidates may be asked to verify their identity before speaking with a recruiter to support a fair and secure hiring process.

🏢 Summary: Senior Full Stack Software Engineer role focused on building and maintaining large-scale, cloud-based data processing and web applications in AWS, with emphasis on serverless architectures. The position involves designing scalable microservices, developing modern frontend applications, and enhancing cloud infrastructure in a distributed international team. 100% remote work with strong focus on scientific and data-intensive systems. 🗂️ Requirements: Minimum 5 years enterprise software development experience, Expert knowledge of Java with Spring and Hibernate/JPA or other JVM languages, Strong expertise in JavaScript and TypeScript with Angular 5+ or React, Understanding of microservices architecture and design patterns, Experience building REST APIs, Experience with SQL, NoSQL and graph databases, Strong knowledge of AWS cloud services, Experience with Docker and containerization, Ability to deploy code to production environments, Experience with Git and GitOps workflows, Experience working with Scrum methodology 📃 Skills: Java, Spring, Hibernate, JPA, JVM, JavaScript, TypeScript, Angular, React, HTML5, AWS, S3, IAM, EC2, ECR, ECS, Lambda, Serverless, Docker, SQL, NoSQL, GraphQL, REST, Git, GitOps, Scrum 🏢 Description: Full Stack Software Engineer Our team, specializing in Data Engineering and Bioinformatics systems development, is actively seeking experienced and motivated senior Fullstack software engineer with hands-on AWS experience , as this position touches the development of data processing in the cloud (mainly AWS) on a very large scale. We invite individuals who are self-motivated and proactive to join us in the development of large-scale scalable computations utilizing AWS services particularly focusing on serverless paradigms. This role involves leveraging AWS services and enhancing our current infrastructure to streamline and future-proof existing solutions. 100% remote work Job Responsibilities Work together in a collaborative and practical manner to address scientific software engineering challenges. Design, build and maintain the web application providing visibility to our data management platform Collaboratively and pragmatically solve scientific software engineering challenges. Collaborate with local - Polish, the US and Canada engineering teams to support software development efforts. Contribute to the broader scientific community through open-source software development. Expectations Minimum 5 years of work experience related to software development in enterprise projects/products and expert knowledge regarding one of the following backend technologies: JAVA  (very good  knowledge of frameworks like Spring, Hibernate / JPA,   knowledge of other JVM based programming languages is a plus); Understanding of microservice architectures, principles and patterns Expert knowledge of Javascript and TypeScript programming (Angular 5+ or React, with good knowledge of HTML5. Experience building reusable web components. Knowledge of git and standard GitOps workflow (MRs, protected branch), conventional commits, semantic versioning, pre-commit hooks, Experience building APIs , good understanding of REST principles Knowledge of database techniques like SQL, NoSQL and graph databases Fluent in the usage of cloud computing models (IaaS, PaaS, SaaS) and good knowledge of containers connected with this DevOps mindset and excellent knowledge of cloud platforms like AWS. Ability to deploy yourself code to production Docker (must have) AWS cloud (including S3, IAM, EC2, ECR, ECS, AWS Lambda, Serverless) Experienced in product development with Scrum methodologies Experienced in designing software components based on limited and evolving requirements Attention to details, focus on user/developer experience Ability to coordinate work and direct collaboration with the customer Good communication skills, team player, work under tight deadlines. We Offer Ongoing support from a dedicated agent , ensuring project continuity, client contact, formalities, work comfort, and development Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT Access to 7N Learning & Development – webinars, articles, industry reports, and invitations to technical, business, and lifestyle events Spectacular integration events for you and your loved ones (Kick-Off trips, Christmas parties, family picnics, etc.) Professional development opportunities beyond the project, including knowledge-sharing initiatives Relationships and access to the most experienced IT experts – average tenure of consultants in Poland is over 10 years Complete benefits package , including medical care, life insurance, sports cards, and store discounts About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sound familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our goal is to provide you with stable and comfortable cooperation, contributing to your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience in creating IT solutions for over 200 organizations.

🏢 Summary: Fullstack Engineer role focused on building and scaling a data and analytics platform for investment decision-making, leveraging machine learning and strategic data. The position involves end-to-end development of production-grade applications, API integration, and ensuring platform scalability and performance in a hybrid work model. 🗂️ Requirements: 4+ years of experience with TypeScript and Node.js in production environments, Strong knowledge of HTML and CSS, Experience with SQL and PostgreSQL databases, Ability to design and integrate REST and GraphQL APIs, Experience with automated testing, pair programming, and peer review practices 📃 Skills: TypeScript, Node.js, HTML, CSS, SQL, PostgreSQL, GraphQL, REST, GCP, DevOps 🏢 Description: About the Project: Our client is a Swedish fintech company expanding in Poland. This project focuses on developing a data and analytics platform designed to revolutionize investment decision-making by leveraging machine learning and strategic data. As a Fullstack Engineer, you will design, develop, and maintain scalable solutions, collaborating with cross-functional teams to ensure the delivery of high-quality features. Work Mode : Hybrid – 2/3 days in the Warsaw office Job Responsibilities: Collaborate with cross-functional teams to ensure the delivery of high-quality features. Contribute to all stages of the development lifecycle. Design, develop, and maintain scalable solutions that support investment operations. Leverage machine learning and strategic data to deliver exceptional insights. Work closely with passionate professionals who believe in collaboration, innovation, and making a meaningful impact. Ensure the platform's scalability and performance through continuous improvement and optimization. Expectations: Must have: 4+ years of experience developing production-grade applications using TypeScript and Node.js Strong understanding of HTML, CSS, and design principles Knowledge of database management with SQL and PostgreSQL Experience with software craftsmanship practices, including automated testing, pair programming, and peer review Ability to write and integrate APIs in various formats such as GraphQL and Rest Nice to have: Experience with Google Cloud Platform (GCP) and DevOps practices. Familiarity with cloud-native development and scalable system architectures. We offer: Ongoing support from a dedicated agent who is caring about your project continuity, contact with clients, necessary formalities, work comfort, and development. Career Development Program – advice on career planning based on the latest trends and market needs in IT, including consultations with career agents and mentors. Access to 7N Learning & Development – a development and educational platform offering webinars, a library of articles and industry reports, and frequent invitations to both one-time and recurring events focused on technical, business, and lifestyle topics. Spectacular events, both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g. family picnics), Professional growth Professional growth beyond your current project. You can actively engage in knowledge sharing through the 7N Services offering, designed for 7N clients. Connections and access to the expertise of top IT professionals in the market – the average professional tenure of our consultants in Poland is over 10 years, A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad.

🏢 Summary: Senior Fullstack Developer (Java) role focused mainly on backend development for a logistics platform providing operational monitoring, schedule transparency, and analytical insights. The position involves designing, developing, and maintaining Java EE applications, including modernization and cloud migration initiatives. Work is primarily remote with occasional on-site visits. 🗂️ Requirements: Minimum 5 years of experience as Fullstack Developer, Strong proficiency in Java, Experience with JSF, JPA, EJB, CDI, JAXRS, Hands-on experience in JEE web application development, Basic knowledge of SQL, Basic knowledge of UNIX, Experience with Maven, Experience with Git, Ability to manage and maintain Payara Server, Experience with requirements analysis and UML modeling, Fluent English (written and spoken) 📃 Skills: Java, JEE, JSF, JPA, EJB, CDI, JAXRS, SQL, UNIX, Maven, Git, Payara, OpenAPI, DB2, Neptune, OpenSearch, PrimeFaces, GitLab, Jenkins, JFrog, AWS, UML 🏢 Description: About the Project For our Client - a global logistics company we are looking for a Senior Fullstack Developer (Java) who will be working with a platform that integrates several sources for giving transparent view for coastals schedule to internal operational stakeholders. Team also provides the tools for the operational monitoring, past performance analysis and recovery measures. Additional insights provided by the platform are based on statistical & analytical approaches (e.g. move prediction, avg. port time, etc.) The role is approx. 75% BE tasks and 25% FE tasks. Tech: Java EE, JDK 8, Payara Server 5, OpenAPI, IBM DB2, Neptune graph DB from AWS, OpenSearch, UI: JSF + Primefaces, GitLab, Jenkins, JFrog Work Mode: remote (with occasional trips to Gdańsk) Job Responsibilities Design and implement full-stack applications (front- and backend) using Java (JEE) Write, test, debug, and document code, solutions, and applications Collaborate with your team to handle the entire software development life cycle: from analysis and design to testing, deployment, maintenance, operations, and 3rd-level support Work closely with internal stakeholders and external partners to analyze existing applications, solutions, business processes, and requirements Modernize and expand current applications by migrating from on-premises infrastructure to a cutting-edge cloud platform Manage and maintain existing on-premises infrastructure, including Payara Application Servers and standalone Java applications Expectations Min. 5 years of experience as Fullstack Developer Strong proficiency in Java, with knowledge of JSF, JPA, EJB, CDI, and JAX-RS Hands-on experience in JEE full-stack web application development Basic knowledge of SQL, UNIX, Maven, and Git Familiarity with requirements gathering, documentation, and the use of software design/modeling tools (e.g., UML) Solid understanding of software development processes, with flexibility and strong customer orientation Excellent command of English , both written and spoken, combined with strong communication skills Nice to have: Experience with agile development methodologies (e.g., Scrum); Knowledge of AWS cloud services (OpenSearch, EC2, Neptune, ECS); Work experience or familiarity with the international logistics industry; DevOps experience We offer Ongoing support from a dedicated agent , taking care of your project continuity, client contact, necessary formalities, work comfort and development Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle Spectacular integration events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres) Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: Remote C# Fullstack Software Engineer role focused on developing and maintaining a scientific platform for pharmaceutical research using high-performance computing and biomolecular analysis. The position involves building enterprise-grade applications, APIs, and microservices while supporting both modern and legacy .NET systems. Candidates will collaborate across teams, contribute to DevOps initiatives, and support Angular-based frontend development. 🗂️ Requirements: 10+ years of software development experience, Strong expertise in C#, Experience with .NET Framework and .NET Core, Knowledge of ASP.NET Framework, Experience with Web API, MVC, Windows Services, WinForms, and WCF Services, Understanding of Object-Oriented Design and design patterns, Experience with Entity Framework Core, LINQ, and ORM tools, Experience building RESTful APIs and microservices, Strong SQL Server and database optimization skills, Experience with multithreading and asynchronous programming, Proficiency with Git, Experience with Angular and AngularJS, Experience managing on-premises SQL Server environments, Ability to work independently in complex technical environments 📃 Skills: C#, .NET, ASP.NET, WebAPI, MVC, WinForms, WCF, EntityFramework, LINQ, REST, Microservices, SQL, SQLServer, Git, Angular, AngularJS, Multithreading, DevOps, CI/CD 🏢 Description: We are looking for an experienced C# Fullstack Software Engineer to join a team responsible for the further development and maintenance of a specialized scientific platform used in the pharmaceutical research domain. The solution leverages high-performance computing capabilities to support advanced biomolecular modeling and analysis, enabling scientists to gain insights into antibody structures and developability characteristics. This role offers the opportunity to work on modern and legacy systems while contributing to the evolution of a business-critical platform. This is a 1 FTE position. Work model: 100% remote Responsibilities Design, develop, and maintain enterprise-grade applications using C# , .NET Framework , and .NET Core Define system architecture, technical solutions, and development best practice Build and optimize scalable, secure, and high-performance APIs and microservices Collaborate with product managers, architects, and cross-functional teams Drive code quality through code reviews and engineering standards Mentor and support junior and mid-level developers Identify and resolve performance bottlenecks and system issues Contribute to DevOps practices, CI/CD pipelines, and automation initiatives Maintain and enhance legacy .NET applications and services Support frontend development activities using Angular and AngularJS Requirements 10+ years of experience in software development with strong expertise in C# and .NET technologies Deep understanding of ASP.NET Framework , Web API , MVC , Windows Services , WinForms , and WCF Services Strong knowledge of Object-Oriented Design (OOD) and design patterns Expertise in Entity Framework Core , LINQ , and ORM tools Extensive experience with RESTful APIs and microservices architecture Strong experience with SQL Server , database design, and performance optimization Experience with multithreading , asynchronous programming , and application performance tuning Proficiency with Git and modern version control practices Experience with Angular and legacy AngularJS applications Experience managing SQL Server Databases and On-Premises SQL Server environments Strong problem-solving skills and ability to work independently in a complex technical environment We offer Ongoing support from a dedicated agent , taking care of your project continuity, client contact, necessary formalities, work comfort and development, Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors, Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle, Spectacular integration events , both for you (e.g., annual Kick-Off trip , Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres), Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients, Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years, A complete benefits package , including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad. About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sound familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our goal is to provide you with stable and comfortable cooperation, contributing to your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience in creating IT solutions for over 200 organizations.

🏢 Summary: Fullstack Software Engineer (Kotlin + React) role in a data-driven advertising project within e-commerce, focused on building scalable microservices and modern web tools for campaign management. The position involves developing backend systems, APIs, and React-based dashboards, working with large data volumes and ML-powered recommendation systems. Remote full-time engagement with impact on solutions used by thousands of users. 🗂️ Requirements: Several years of experience as Fullstack Developer with strong backend focus, Strong knowledge of Kotlin, Strong knowledge of Spring Boot, Experience with microservices architecture, Experience with Google Cloud Platform, Experience with relational and non-relational databases, Strong knowledge of TypeScript, Strong knowledge of React, Experience with testing frameworks (Jest, Vitest or Playwright), Experience with large-scale data processing, Knowledge of Server-Side Rendering, Experience with AI-assisted development tools 📃 Skills: Kotlin, SpringBoot, Microservices, GCP, MongoDB, SQL, TypeScript, React, Jest, Vitest, Playwright, SSR, Scala, Copilot, AI, EventDriven, MachineLearning, REST, API 🏢 Description: Dla naszego klienta z branży e-commerce poszukujemy osoby na stanowisko Fullstack Software Engineer (Kotlin + React) do projektu z obszaru reklamy i danych. Dołączysz do zespołu rozwijającego nowoczesne narzędzia wspierające sprzedawców w zarządzaniu kampaniami reklamowymi i rozwijaniu ich biznesu. Projekt ma silny komponent data-driven i opiera się na przetwarzaniu dużych wolumenów danych oraz wykorzystaniu rozwiązań Machine Learning do budowy systemów rekomendacyjnych. To rola dla osoby, która dobrze odnajduje się w środowisku produktowym, lubi pracę przy skalowalnych systemach i chce mieć realny wpływ na rozwiązania wykorzystywane przez tysiące użytkowników. Lokalizacja: praca zdalna (1-2 razy na kwartał spotkanie w Warszawie lub Krakowie) Forma współpracy: full-time Start: 01.06.2026 Zaangażowanie: do końca 2026 (z możliwością przedłużenia) Zakres obowiązków Rozwój i utrzymanie systemów backendowych opartych o architekturę mikroserwisową Budowa i integracja rozwiązań wspierających systemy rekomendacyjne we współpracy z zespołami Data Science Projektowanie i rozwój wydajnych API zasilających narzędzia analityczne i dashboardy Praca z dużymi wolumenami danych w architekturze event-driven Rozwój warstwy frontendowej (React) - dashboardy i narzędzia dla użytkowników biznesowych Dbanie o jakość, wydajność i skalowalność tworzonych rozwiązań Oczekiwania Kilkuletnie doświadczenie w pracy na stanowisku Fullstack Developera , z wyraźnym naciskiem na rozwój backendu Bardzo dobra znajomość języka Kotlin oraz frameworka Spring Boot Doświadczenie w projektowaniu i rozwijaniu architektury mikroserwisowej Praktyczna znajomość środowisk chmurowych, w szczególności Google Cloud Platform (GCP) Doświadczenie w pracy z bazami danych - zarówno nierelacyjnymi (MongoDB), jak i relacyjnymi (SQL). Dobra znajomość TypeScript oraz biblioteki React w kontekście budowy nowoczesnych aplikacji webowych Znajomość narzędzi i frameworków testowych, takich jak Jest, Vitest lub Playwright Doświadczenie w pracy z narzędziami wspierającymi development, w tym rozwiązaniami typu Copilot lub innymi narzędziami opartymi o AI Znajomość języka angielskiego na poziomie minimum B2 , umożliwiająca swobodną pracę w środowisku technicznym. Znajomość podejścia Server-Side Rendering (SSR) Doświadczenie w projektach opartych o przetwarzanie dużych wolumenów danych Mile widziane: znajomość języka Scala Oferujemy Stałe wsparcie osobistego agenta , dbającego o Twoją ciągłość projektową, kontakt z klientem, niezbędne formalności, komfort pracy oraz rozwój, Consultant Development Program – doradztwo w planowaniu kariery w oparciu o najnowsze trendy i potrzeby rynku IT, obejmujące m.in . konsultacje z agentami i mentorami kariery , Dostęp do 7N Learning & Development – platformy rozwojowo-edukacyjnej z webinarami, biblioteką artykułów i raportów branżowych oraz regularnymi zaproszeniami na jednorazowe i cykliczne wydarzenia rozwojowe – techniczne, biznesowe oraz life-stylowe, Spektakularne eventy integracyjne , zarówno dla Ciebie (np. coroczny wyjazd Kick-Off , imprezy świąteczne czy sportowe Letnie Igrzyska), jak i dla Twoich bliskich (np. pikniki rodzinne, premiery filmowe), Rozwój zawodowy nie tylko podczas projektu – możesz zaangażować się w przekazywanie wiedzy innym w ramach oferty 7N Services kierowanej do klientów 7N, Relacje i dostęp do wiedzy najbardziej doświadczonych ekspertów IT na rynku – średni staż zawodowy naszego Konsultanta w Polsce to ponad 10 lat. Pakiet benefitów zaplanowany od A do Z , czyli dofinansowanie do opieki medycznej, ubezpieczenia na życie, karty sportowej dla Ciebie i Twoich bliskich, a także zniżki do sklepów w Polsce i za granicą O 7N Ciągłe poszukiwanie projektów, trudne negocjacje stawek, brak wsparcia w rozwoju – brzmi znajomo? W 7N zyskujesz nie tylko stabilność kontraktów, ale też zaangażowanie osobistego opiekuna dbającego o Twój komfort zawodowy i stały dostęp do inicjatyw rozwojowych. Naszym celem jest zapewnienie Ci stabilnej i komfortowej współpracy, która przyczyni się do sukcesu Twojego jako eksperta IT oraz naszych klientów. Budujemy trwałe relacje, bazując na skandynawskich wartościach i 30-letnim doświadczeniu w tworzeniu rozwiązań IT dla ponad 200 organizacji.

🏢 Summary: Senior Full-Stack Engineer role focused on enterprise-scale application security and cloud-native architecture, leveraging AI to scan and remediate vulnerabilities across 50,000+ GitHub repositories. The position involves designing scalable cloud platforms, automating CI/CD processes, and leading large-scale repository migrations. Offers exposure to distributed systems, serverless solutions, and advanced AI tools in a hybrid work model. 🗂️ Requirements: 3+ years of full-stack development experience, Strong expertise in TypeScript or Java or Python, Proficiency with SVN, Proficiency with Jenkins and Jenkins infrastructure, Experience with GitHub and GitHub Actions/Workflows, Experience with CI/CD best practices, Experience with AI tools (Claude, Copilot), Hands-on experience with AWS services, Experience with CloudFormation, Experience with Docker, Experience with cloud-based databases, Experience with cloud-native application development, Experience with automated testing, Strong troubleshooting skills in cloud infrastructure and networking, Knowledge of security best practices, B2 level English 📃 Skills: TypeScript, Java, Python, SVN, Jenkins, GitHub, GitHubActions, CI/CD, Claude, Copilot, AWS, CloudFormation, Docker, Databases, Networking, Security, Testing 🏢 Description: We are looking for a skilled Senior Full-Stack Engineer with expertise in AI to join our team. Join a high-impact initiative focused on enterprise-scale application security and cloud-native architecture. The project involves scanning, remediating, and deploying fixes for security vulnerabilities across a vast estate of 50,000+ GitHub repositories. This role offers exposure to large-scale distributed systems, serverless cloud solutions, and the opportunity to leverage AI technologies at the enterprise level. Please note, the position requires hybrid (3 days office ) work in Gdansk or Krakow. Responsibilities Lead the design, implementation, and deployment of scalable, reliable cloud platforms aligned with business and enterprise needs, driving continuous technical and operational improvements Maintain and enhance automation processes and scripts to support scalable, repeatable workflows Develop automation for migrating repositories from SVN/Jenkins to GitHub, ensuring proper setup and supporting build/deployment troubleshooting Optimize build and deployment speed, improve developer experience with CI/CD, and enhance end-to-end integrations Provide hands-on support to development teams in resolving build and deployment failures Establish and maintain technical standards, best practices, and documentation for efficient, well-governed development and operational workflows Collaborate with business stakeholders to translate requirements into technical designs and recommend appropriate tools and solutions Drive cross-team collaboration on complex initiatives, proactively identifying risks, dependencies, and mitigation strategies Serve as a technical point of accountability, balancing hands-on contribution with leadership responsibilities to ensure successful delivery Requirements 3+ years of professional experience in full-stack development Strong expertise in at least one programming language, preferably TypeScript Java or Python experience Proficiency with SVN/Jenkins, Jenkins infrastructure, Jenkins runners, GitHub, GitHub Actions/Workflows, and CI/CD best practices Experience using AI tools such as Claude Skills and Copilot Hands-on experience with AWS services (including CloudFormation and Docker), cloud-based databases, cloud platform engineering, cloud-native application development, and automated testing Strong troubleshooting skills in cloud infrastructure, networking, security best practices, and performance optimization Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Excellent verbal and written communication skills; B2 level of English We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Full-Stack Engineer role focused on enterprise-scale application security, cloud-native architecture, and AI-driven automation across 50,000+ GitHub repositories. The position involves designing scalable cloud platforms, automating repository migrations, optimizing CI/CD pipelines, and resolving complex build and deployment issues. It offers hands-on technical leadership in distributed systems and serverless environments within a hybrid work model. 🗂️ Requirements: 3+ years of professional experience in full-stack development, Strong expertise in at least one programming language (TypeScript, Java or Python), Proficiency with SVN, Jenkins, Jenkins infrastructure and runners, Experience with GitHub and GitHub Actions/Workflows, Strong knowledge of CI/CD best practices, Experience with AI tools such as Claude Skills and Copilot, Hands-on experience with AWS services including CloudFormation and Docker, Experience with cloud-based databases and cloud-native application development, Experience with automated testing, Strong troubleshooting skills in cloud infrastructure, networking and security, B2 level of English 📃 Skills: TypeScript, Java, Python, SVN, Jenkins, GitHub, GitHubActions, CI/CD, Claude, Copilot, AWS, CloudFormation, Docker, Databases, Automation, Networking, Security, Testing 🏢 Description: We are looking for a skilled Senior Full-Stack Engineer with expertise in AI to join our team. Join a high-impact initiative focused on enterprise-scale application security and cloud-native architecture. The project involves scanning, remediating, and deploying fixes for security vulnerabilities across a vast estate of 50,000+ GitHub repositories. This role offers exposure to large-scale distributed systems, serverless cloud solutions, and the opportunity to leverage AI technologies at the enterprise level. Please note, the position requires hybrid (3 days office ) work in Gdansk or Krakow. Responsibilities Lead the design, implementation, and deployment of scalable, reliable cloud platforms aligned with business and enterprise needs, driving continuous technical and operational improvements Maintain and enhance automation processes and scripts to support scalable, repeatable workflows Develop automation for migrating repositories from SVN/Jenkins to GitHub, ensuring proper setup and supporting build/deployment troubleshooting Optimize build and deployment speed, improve developer experience with CI/CD, and enhance end-to-end integrations Provide hands-on support to development teams in resolving build and deployment failures Establish and maintain technical standards, best practices, and documentation for efficient, well-governed development and operational workflows Collaborate with business stakeholders to translate requirements into technical designs and recommend appropriate tools and solutions Drive cross-team collaboration on complex initiatives, proactively identifying risks, dependencies, and mitigation strategies Serve as a technical point of accountability, balancing hands-on contribution with leadership responsibilities to ensure successful delivery Requirements 3+ years of professional experience in full-stack development Strong expertise in at least one programming language, preferably TypeScript Java or Python experience Proficiency with SVN/Jenkins, Jenkins infrastructure, Jenkins runners, GitHub, GitHub Actions/Workflows, and CI/CD best practices Experience using AI tools such as Claude Skills and Copilot Hands-on experience with AWS services (including CloudFormation and Docker), cloud-based databases, cloud platform engineering, cloud-native application development, and automated testing Strong troubleshooting skills in cloud infrastructure, networking, security best practices, and performance optimization Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Excellent verbal and written communication skills; B2 level of English We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.