backend engineer nodejs

Talanto poszukuje developers backendu z doświadczeniem w Pythonie, FastAPI i projektowaniu REST API. Doświadczenie w AWS i kontenerach Docker będzie dodatkowym atutem. Praca w modelu hybrydowym, 2 dni w biurze we Wrocławiu, Poznaniu lub Gdańsku, zdalne wsparcie i rozwój w projektach AI/ML.Wymagane B2/C1 z języka angielskiego, dobra współpraca...

Box Poland seeks an experienced Backend Software Engineer III to join the Automate team. You will design and develop backend services in Java, focusing on scalable workflow automation and graph-based execution.You will collaborate with product and infrastructure, review code, mentor juniors, and participate in on-call rotations. The role requires 3+ years of...

Sii Poland is seeking an experienced backend developer to design and implement IT systems for a major Polish bank in Łódź. You will work with Microsoft technologies, collaborate with business users, and participate in Scrum ceremonies to deliver robust features.The role requires 4+ years of C# and MS SQL experience, proficiency with .NET, EF, Web API, and...

Allegro, Warsaw-based tech company, seeks skilled backend engineers to design, build, and optimize large-scale systems powering a real-time marketplace.You will own microservices from design to deployment, work with a modern cloud-native stack, and collaborate with ML/DS teams to translate data into impactful product features. Hybrid work in Poland and a...

Ox Security in Warsaw, Poland, is seeking a Backend Team Lead to guide engineering execution, shape architecture, and deliver scalable, high‑quality software.This hands‑on leadership role partners with Engineering, Product, Customer Success and customers, owning execution across multiple workstreams and steering technical decisions.You’ll drive...

UST is seeking a Lead I - Software Engineering to design and develop Python-based backend services and APIs. The role emphasizes Flask-based solutions, Linux environments, Docker images, and robust testing alongside CI/CD automation.You will contribute to validation programs, manage databases, and drive software quality through comprehensive test suites and...

Expert knowledge of Java 21+ (including JVM internals, memory management, Project Loom) and modern Spring ecosystem Solid experience with secure coding practices and building authentication/authorization flows using OAuth2/OpenID Connect Proven experience with Google Cloud Platform components (particularly GKE, Cloud Spanner, Cloud SQL) Strong practical...

Luxoft Poland seeks an experienced backend developer to work on a monitoring and diagnostics system for investment insights. You will design and deliver production-grade APIs using Python and FastAPI, with strong emphasis on security, versioning, and observability.The role requires 8+ years in software development, AWS familiarity, and experience with CI/CD...

SumUp is hiring a backend engineer to join the Sell Online Tribe in Warsaw, focusing on the Bookings product. You will design, build, and maintain scalable backend services, collaborating with frontend and mobile teams to deliver robust APIs across web, iOS, and Android.The role requires 5+ years in backend development, strong Kotlin/Java and Spring Boot,...

We are looking for a strong backend engineer who wants to design and scale core systems powering product and assortment management across a large retail ecosystem. You will take ownership of backend architecture and system evolution within the assortment management domain, building scalable services and integrations across a complex, event-driven enterprise...

LiveChat is searching for an experienced backend developer to work on AI-driven features. This role requires at least 6 years of experience with Node.js and TypeScript, alongside strong knowledge in database ecosystems, real-time communication, and backend architecture. As part of the AI Engines team, you will build scalable systems and collaborate on...

Sensor Tower, a leading digital intelligence platform, is seeking curious early-career engineers to help build fast, reliable systems that power market insights for SMBs.You’ll work with experienced engineers on features from day one, participate in the full development life cycle, and learn how large-scale systems are designed and deployed.If you enjoy...

Luxoft Poland is seeking a skilled backend engineer to join the CASP division. You will migrate on-prem systems to a modern Microsoft Azure cloud environment, transforming legacy architecture into scalable, cloud-native microservices for securitization and credit workflows.You will design and implement REST APIs, containerized services, and data interactions...

IT Performance poszukuje doświadczonego .NET Developera (Mid/Senior) do zespołu zajmującego się systemami Security, Video-CCTV i Data Processing. Praca w środowisku on-premise, z planowaną migracją do .NET 10, z możliwością obsługi starszych komponentów .NET Framework. Zakres obejmuje rozwój i utrzymanie backendu C#/.NET, integracje z innymi...

DXC Luxoft is seeking a Senior Cloud Engineer to design, build, and scale cloud services for remote device management, OTA updates, and observability across multi-region deployments. You will own CI/CD pipelines, set engineering standards, and collaborate with hardware, product, and software teams to deliver robust solutions.The role emphasizes secure,...

Sigma Software is seeking a Senior Golang Backend Engineer to join a cross-functional team delivering cutting-edge AdTech and cybersecurity solutions. You will design, develop, and maintain high-performance backend services in Golang, and contribute to building scalable, low-latency systems used by major internet platforms.You will collaborate with data...

Clurgo to firma stworzona przez developerów dla developerów. Dołączasz do zespołu specjalizującego się w budowie i utrzymaniu aplikacji AI opartych na backendach, pracujących w modelach LLM i architekturach RAG.Pracuj w Krakowie na kontrakcie B2B, z pracą hybrydową i realnym wpływem na produkcję. Twoje zadania to rozwój usług AI, integracja...

Teltonika in Warsaw, Poland, is seeking a Mid Backend Software Engineer to join our developers' team. You will design, implement, and maintain embedded Linux software for IoT devices, and build and maintain our API framework used by other R&D teams.You should have 2+ years in C, APIs, and Shell/Python scripting, plus Git and Linux knowledge, and good English...

Jas Gujral client in Kraków is seeking a senior C# .NET Software Engineer with 5+ years of hands-on experience developing robust applications in an Agile environment.You will work on back-end services using C#, .NET Core, ASP.NET Web API, and ensure code quality with TDD, SOLID principles, and clean coding practices. Polish language is a plus; daily rate is...

VM.pl sp. z o.o is seeking aSenior Java Developer (Backend) for a remote or Wrocław-based role on a B2B contract. You will work on a multi-tenant, cloud-native compliance SaaS with Flowable BPMN embedded in Spring Boot, securing data localization, integrity, and GDPR compliance.Ideal candidates bring Java 21, Spring Boot 3, Flowable experience, and strong...