Top Software Engineer Jobs in Poland

Design, develop, and maintain scalable, secure backend systems. Work on greenfield projects and improve existing systems, building REST APIs and microservices powering payments, treasury, transaction booking, and crypto liquidity. Use Java 25, Spring Boot, and Postgres with TDD, DDD, and CI/CD practices to deliver maintainable, high-performing services.

Fullstack engineer (backend-focused) building synthetic testing, evaluation frameworks, and validation tools for AI agents. Develop APIs, event-driven systems, data workflows, and user-facing tools while collaborating with product, design, data, and ML teams to ensure reliability, performance, and product-quality delivery.

Design and implement scalable Python-based AI/ML software and services. Integrate models with existing systems, optimize performance, collaborate with Data Scientists and developers, and improve development processes and deployment pipelines.

Build and maintain AWS serverless backend services and scalable APIs (Node.js, TypeScript, GraphQL). Contribute across the full stack, support CI/CD, observability, event-driven architectures, integrations, and drive platform and engineering improvements from design to production.

Migrate the Billing system database from Sybase to PostgreSQL without functional changes, implement and maintain REST interfaces, perform technical analysis of systems and business logic, collaborate with cross-functional teams, and develop high-quality code following best practices.

Build and scale a blockchain data platform handling petabytes of on-chain data. Design and implement distributed systems, data ingestion/decoding pipelines, and performant SQL processing. Write production code (Kotlin, Go, Java, Rust), improve developer experience, automate operations (including AI-driven automation), and own platform components.

Lead and deliver Repayment UX mobile features using React Native; define technical plans, collaborate with product/design/analytics, support production availability and on-call, mentor engineers, improve code and design standards, and drive quality and ownership across the team.

Lead design, develop, and maintain the Device Automation/ServiceNow platform. Collaborate with cross-functional teams to translate requirements, build integrations, run system testing, monitor platform health, create scripts/workflows, troubleshoot issues, and provide end-user training and support.

Senior full‑stack engineer responsible for shipping production features across the stack with minimal oversight. Own complex UI/UX using TypeScript, React and Next.js; deliver backend services with Node.js, Fastify and Postgres. Collaborate directly with founders on product and architecture, contribute to Python-based ML/AI components, and operate in a high-autonomy hybrid/remote environment.

Build and maintain a production-grade iOS app using Swift and SwiftUI, integrating AI features via backend APIs. Design AI UX patterns, optimize performance, memory, and battery, capture user signals for evaluation, collaborate with backend and ML engineers, and ensure App Store quality, stability, and reliability.

Build and maintain a production Android app in Kotlin with AI-native features. Integrate chat, vision, and voice via backend APIs; design streaming UX patterns; optimize performance and memory for AI-heavy flows; implement analytics, logging, and feedback; collaborate with backend and ML teams to ensure stability, security, and scalability in production.

The Senior Software Engineer will design, develop, and maintain backend services for the Core Enrichments team, enhancing data pipelines and collaborating with cross-functional teams to improve performance and reliability.

Design and develop full-stack applications using Node.js, C#/.NET, and SQL. Collaborate with teams to deliver high-quality tech solutions. Requires 7+ years experience.

As a Backend Engineer, you will design, deliver, and own backend features for the merchant platform, focusing on reliability and performance while collaborating with your team.

As a Backend Engineer L3 for Primer's Orchestration team, you will design and deliver backend services, monitor production impact, and ensure reliability and performance of payment systems.

As a Backend Software Engineer, you'll design scalable backend systems, optimize database performance, and collaborate with front-end and DevOps teams.

Manage and lead Order Gateway Developers to implement business requirements, ensure high-quality standards, and improve team efficiency while enhancing software performance.

Contribute to Juju's development, collaborate with teams on distributed systems, debug issues, and enhance cloud automation features.

The OS Tools Software Engineer will design and implement tools for Vehicle OS, focusing on messaging systems and developer environments, contributing to autonomous driving technology.

Develop and optimize algorithms for battery and renewable energy projects, analyze market data trends, and ensure algorithm performance.

Develop and maintain high-performance microservices, engage in the full software development lifecycle, and collaborate within autonomous teams. Understand service architecture and optimize solutions for scalability and resilience.

Backend-focused Full Stack Engineer responsible for modernizing and maintaining event-driven .NET microservices (Kafka), developing features, improving reliability and performance, writing/testing/documenting code, supporting incident triage and customer cases, and collaborating with a distributed team. Occasional frontend work with TypeScript/JavaScript.

Develop scalable web-based solutions, implement new features, optimize performance, and collaborate with engineers and product managers in an agile environment.

As a Senior Software Engineer, you will build full-stack experiences for global payment systems, lead frontend development, and uphold company culture while delivering quality features for users.

Join an agile team as a C++ developer focused on Layer 2 development for a 6G UE Simulator. Responsibilities include analysis, design, and implementation of high-quality code for simulation solutions.