1521 backend developer English-speaking jobs in Masovian Voivodeship

Developer to join Supono Holdings LTD and help us build fast, reliable, and scalable backend systems ... company growth Notes This job opportunity is open only to residents of Poland We’re looking for a Backend ... Express RESTful APIs MongoDB & MySQL Docker Firebase Firestore What We’re Looking For 4+ years of backend ... We Work Projects move fast— often from scratch to launch within 2–7 days You may be asked to start backend ... clarity, and accountability Nice to Have Experience integrating AI / ML APIs Familiarity with scalable backend

We are looking for an experienced Java developer to join our team and work on a mature high-load backend ... The project includes a large monolithic Java application with legacy web components and a set of backend ... The role also involves participation in new AI-driven initiatives, including backend integrations with ... Responsibilities Develop and maintain backend functionality for web and mobile applications Work with ... services interacting with LLM APIs and AI-based data processing pipelines Optimize performance of backend

Position overview In this role, you will improve and maintain existing backend services written in Go ... Responsibilities Maintain and improve existing backend services written in Go Design schemas, optimize ... queries, and manage safe database migrations in PostgreSQL Develop backend logic and agentic components ... , and infrastructure components Requirements Experience developing backend services using Go Experience ... This position provides opportunities to influence backend architecture and extend the platform with scalable

We’re currently seeking a passionate freelance Senior Backend Developer to join our team ASAP. ... We’re not hiring a senior developer who executes well. ... Be part of groundbreaking IoT projects, shaping the future of cloud and backend technology. ... If you’re a backend engineer who doesn’t just build what’s asked but shapes how it’s built, we’d love ... with intent, you'll have the opportunity to work on diverse IoT projects, leveraging your expertise in backend

Your Role As a Fullstack Developer, you’ll primarily work with Node.js on the backend, React on the frontend ... Responsibilities Develop backend services with *Node.js (NestJS/Express) Build frontend apps with *React ... in backend applications At least 2 years of experience in maintaining production applications Solid ... , and blockchain teams Requirements Strong backend skills in Node.js/NestJS At least 5 years of experience ... Technical Interview / Task – Backend (Node.js) and frontend (React) focus, with some discussion of smart

The Java Developer is responsible for working alongside Citi’s Financial Resource Management (FRM) team

Responsibilities Design and develop REST APIs Build and maintain backend applications using Java and

Proactive in improving code quality and developer experience. ... Role Overview We are looking for a Senior Back-End Developer to design, build, and improve the APIs, ... Essential Requirements Experience working as a Back-End or Full-Stack Developer in a SaaS environment ... Preferred Requirements Experience with infrastructure-as-code tools such as Terraform or Terragrunt and AWS developer

Java Backend Developer will design, develop, and maintain Java EE server-side components. Responsibilities include writing functional and integration tests, collaborating on technical documentation, and applying security best practices. Requires expertise in JAX-RS, JPA, JAXB, CDI, Maven, SQL, and NoSQL databases.

Talented Java developers sought for long-term contract. Requires English communication, basic knowledge of Java, Spring, React, Linux, and database engines. Must possess strong problem-solving skills and be willing to learn.

You will work primarily in Java on the backend, with growing involvement in TypeScript and React on the ... leveraging modern tooling (including AI) where it adds value Contribute across the stack — primarily backend ... MUST HAVES ~2 years of professional software engineering experience Solid foundation in Java for backend ... frontend, integrating AI coding assistants like Claude Code and Codex into developer workflows. ... The role focuses on improving test reliability, coverage, and developer experience alongside a collaborative

NumPy SciPy Spark pytest flake8 pylint about-project : We are looking for an experienced Python Developer ... responsibilities : Design, develop, and maintain scalable backend applications using Python Build and ... responsible for developing and maintaining backend applications and AI-powered solutions for our clients

developer frontend developer fullstack developer mobile developer technical leader automated test programmer ... Senior Backend Engineer (Kotlin) Miejsce pracy: Warszawa Technologies we use Expected Kotlin PostgreSQL ... In this role, you will design and build high-performance backend systems that power content delivery ... languages Experience with modern backend frameworks (e.g., Spring Boot or Python-based frameworks) Strong ... as Senior/4 years of experience as a Mid Engineer Strong proficiency in Kotlin, Python, or similar backend

Are you an experienced C# Developer ready to join a cutting-edge global financial project? ... We are partnering with a leading international financial institution seeking a Senior C# Developer to ... What you9ll do: Develop and maintain core backend systems using C# .NET, ASP.NET Web API, and event-driven ... committed to clean code and software craftsmanship Influence the migration to a modern event-driven backend

Your Role As a Senior Java Developer, you’ll take technical ownership of backend services, influence ... work from our office near the Plac Wilsona metro station 5 years of commercial experience as a Java Developer ... B2B / Freelance About Silk Software House Silk Software House builds and maintains mission-critical backend ... Responsibilities Design and implement backend architectures using Java 11 and Spring Lead development ... knowledge of Hibernate ORM , SQL databases, and JVM behavior Experience designing scalable, maintainable backend

We are seeking an experienced Full Stack Developer (Krypton UI & Platform Mesh) to join a cloud-native ... with key management or cryptography concepts Familiarity with KMIP protocol Experience with internal developer ... on a greenfield open-source platform, focusing on micro frontend architecture and Kubernetes-based backend ... integrated with a platform mesh system Develop Kubernetes controllers connecting UI layer with crypto backend ... architecture and build system components from scratch Collaborate closely with platform engineering and backend

The developer should possess strong experience in backend and frontend technologies, with a collaborative ... Backend services design and implementation skills. Experience in unit testing. ... Overview The position of Senior FullStack Developer is a crucial role within our Corporate Netbank system

creating a new user experience within a cloud-native platform, combining frontend development with backend ... Contributing to an open-source project hosted on public GitHub Collaborating closely with platform and backend ... Full Stack Developer (Go / Kubernetes / React) 100% REMOTE WORK B2B via Experis B2B rate: 150-160 PLN ... nettoVAT/h Full-time job About the Role We are looking for a Full Stack Developer to join a cutting-edge ... platforms or internal developer portals Understanding of OIDC and IAM integrations What We Offer Fully

Type of work : Full-time; Remote/Hybrid (Warsaw) As a Senior Java Developer, you will lead the design ... , development, and maintenance of high-performance backend systems. ... Ensure security, scalability, and performance in all backend solutions.

Developer (mid–senior level) Hands-on experience with Azure (App Services, Functions, AKS, Storage, ... number of recruitment projects we undertake for our partners, we are currently looking for: Python Developer ... with Azure Responsibilities: Design, develop, and maintain backend services using Python Build and optimize ... with Git and collaborative development workflows Awareness of security best practices in cloud and backend ... reviews, planning, and architecture discussions Requirements: Strong commercial experience as a Python Backend