Top Software Engineer Jobs in Krakow

Design, implement, and maintain backend microservices for large-scale data platforms. Partner with product and engineering teams to build customer-facing reports and alerts, troubleshoot complex issues, and ensure quality and availability through automation and monitoring.

Build and maintain hardened Ubuntu-based container images and the automated CI/CD pipelines to build, test, scan, sign, publish, and retire them. Integrate upstream open-source projects, ensure security and cloud-native compatibility, collaborate with cross-functional teams, document and share knowledge, mentor colleagues, and contribute to hiring. Work in a distributed agile environment with occasional travel.

Work as a hands-on full-stack Software Engineer in a cross-functional squad building cloud-native features and services. Write TypeScript for frontend and backend, build/consume REST and GraphQL APIs, write tests, use CI/CD and Terraform to deploy to AWS, participate in code reviews and improve workflows including AI tooling.

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.

Design and build production systems that let AI agents author and verify code changes within deterministic gates. Own features end-to-end, define trust boundaries and least-privilege models, implement observability and auditing, collaborate with security and platform teams, and apply engineering best practices to keep agentic systems secure and auditable.

Join a cross-functional product team as a Senior Backend Engineer to design and implement resilient, secure .NET microservices. Responsibilities include building and maintaining APIs, diagnosing performance issues, writing comprehensive tests, addressing security vulnerabilities, interpreting code metrics to improve maintainability, and collaborating directly with clients while staying current with technical trends.

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.

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

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.

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

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

Join a Scrum team to develop and maintain C++ software for radio base station equipment across the full SDLC. Work on features, integration, testing, CI (Jenkins), and automation using Linux, Docker, Git, and occasional Python. Learn from experienced engineers and contribute to quality-critical public-safety communications products. Must commit minimum 24 hours/week, one-year cooperation, and be onsite two days/week in Krakow.

The Staff Software Engineer will lead technical strategy, mentor engineers, and drive development for full stack systems impacting customer experience.

As a Senior iOS Engineer, design and maintain scalable iOS applications using Swift, focusing on performance, user experience, and modern architectures. Engage in code reviews, collaborate with teams, and utilize AI tools for efficiency.

Design, build, and operate high-volume Python back-end services, APIs, EDI workflows, data pipelines, and event-driven systems. Optimize relational databases, contribute to React and TypeScript development, improve reliability and observability, participate in incident response, and mentor engineers. Lead architectural decisions, collaborate cross-functionally, and promote AI-first engineering practices using tools such as Claude, GitHub Copilot, and Cursor.

Work as a Java software engineering intern writing Java code, creating unit/integration tests, participating in team planning, supporting releases, collaborating with QA, and providing responsive business support while learning tech and tooling.

Software Engineers at QuantCo will design and develop scalable solutions, integrate models into client businesses, and improve products based on client feedback.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

Join a global tech company as a Senior Full-Stack Software Engineer, focusing on core product evolution, architectural decisions, and delivering high-quality software solutions using Python and React.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

Design and lead Java/Spring and Kafka Streams services processing high-volume BLE and IoT telemetry. Own third-party device integrations, real-time data ingress and egress, external APIs, architecture, documentation, testing, observability, and production reliability. Collaborate with product, data platform, and SRE teams; resolve dependencies, establish engineering standards, use AI development tools, and mentor engineers across a distributed, multi-tenant SaaS platform.

Own the end-to-end architecture and implementation of a scalable data platform processing real-time IoT telemetry and predictive analytics. Build Kafka-based streaming and batch pipelines, Kubernetes workloads, AWS infrastructure, relational data models, integrations, and CI/CD systems. Lead performance, reliability, observability, privacy, and compliance efforts in regulated healthcare environments, while applying AI-assisted engineering practices and participating in 24/7 on-call support.

Build and ship growth-focused changes across mobile, web, and backend. Design experiments to improve onboarding, activation, monetization, and retention. Own implementation, testing, release, instrumentation, and production monitoring; improve experimentation systems and subscription/payment journeys.