Top Software Engineer Jobs in Warsaw

Develop and maintain automated test frameworks for user interfaces, web services, APIs, and core platform capabilities. Own end-to-end testing for release changes, improve testing infrastructure, and perform integration and regression testing. Collaborate with engineering, product, QA, and global teams while applying Java, TypeScript, or Python alongside Playwright, Cypress, TestNG, and JUnit. Use knowledge of web technologies and internet protocols to support secure, reliable software delivery.

Designs and owns high-volume Python backend services, APIs, EDI document workflows, data pipelines, and event-driven processing for a fulfillment platform. Leads architecture and technical decisions, optimizes relational databases, contributes to React and TypeScript frontend development, and improves reliability through observability and incident response. Mentors engineers, collaborates cross-functionally, and promotes AI-first engineering practices using tools such as Claude and GitHub Copilot.

Senior software engineer responsible for designing, developing, and maintaining business-critical applications. Collaborate with product, QA, DevOps, and stakeholders to translate requirements, implement scalable Java/Python solutions on AWS, address technical debt, improve performance, participate in code reviews, support releases, and ensure application stability and continuous improvement.

Develop and maintain NedGraphics cloud collaboration platform and integrations. Build serverless AWS backends, secure REST APIs and event-driven workflows, ensure performance and security, implement automated testing, and produce developer-friendly documentation for third-party and ERP/PLM integrations.

Design and build production-grade mission, behavior, and motion planning systems for autonomous ground vehicles in airport airside environments. Drive architecture and algorithm selection, prototype optimization- and learning-based planners, collaborate with perception/localization/controls teams, promote safety and engineering best practices, and mentor engineers.

Own and build foundational backend services: identity, authorization, audit logging, data pipelines, and low-latency APIs. Architect, implement, monitor, and refactor distributed microservices ensuring high consistency, observability, and automation while partnering with Product and cross-functional teams.

Build core components of a diagnostic and personalization platform: backend data pipelines, frontends, services for genomic data ingestion, ML model integration, APIs, and cloud infrastructure. Collaborate with product and ML teams, iterate on prototypes and MVPs, and make architectural decisions supporting scalability and reliability.

Design and build the on-prem software stack for ModelVault appliances: containerized inference engines, model integration (LLMs/vision), deployment tooling, CLIs/GUI/APIs, OS and GPU setup, remote updates, telemetry, and collaborate with customers and founding team to iterate and scale the engineering org.

Validate telemetry, events, logs, crash reports and end-to-end data pipelines for Logitech devices. Design and run manual and automated tests, analyze field data and trends, investigate regressions, partner with engineering to root-cause issues, build automation and dashboards, and use AI/analytics to improve software quality and release readiness.

Define and evolve system architecture, translate business needs into scalable solutions, drive architectural decisions, contribute hands-on to implementations, modernize monoliths, and promote engineering best practices across teams.

Seeking a Senior Software Engineer to build AI inference systems. Responsibilities include optimizing GPU kernels, architecting inference stacks, and defining benchmarking methodologies. Requires strong programming skills and experience in ML systems.

Design, build, and maintain test automation frameworks (APL/C#), execute manual and exploratory testing, validate complex financial solutions, test APIs and data pipelines, report bugs, integrate tests into CI/CD, and learn/apply APL.

Design and maintain SimCorp One Standard solutions, translating business requirements, troubleshooting issues, and collaborating with multiple stakeholders to ensure client success in financial technology.

Lead the Technical Enablement efforts to build and manage end-to-end infrastructure, create automated E2E tests, support CI/CD and DevOps practices, provide first-level tech support, debug failing tests, and develop tooling to enable consistent, scalable delivery across value streams.

Design, implement, and maintain full-stack features for collateral and derivatives products. Own technical delivery, drive automation-first testing (E2E, API, integration), perform exploratory manual testing, define test strategies, contribute to architecture, mentor engineers, and improve CI/CD pipelines and engineering practices.

Design and build Python applications and AI agents, contribute to component design, deployment, and data storage solutions. Optimize performance, maintain version control, collaborate with clients and distributed teams, and support delivery of enterprise-grade AI-enabled platforms. Occasional onsite travel to London required.

Own end-to-end architecture and roadmap for a network monitoring product: API and UI, topology and dependency modeling, discovery/onboarding, alert history screens, data contracts with telemetry/classification services, performance-focused topology visualizations, cross-team technical leadership, and mentoring.

Design, build, scale, and operate internal CI/CD, testing, and observability tooling. Improve build system maintainability and feedback speed, troubleshoot systems, and implement infrastructure-as-code.

The Senior Software Developer at OneOcean will execute software projects, collaborate with stakeholders, and promote continuous improvement in Python development while using agile methodologies to enhance team collaboration and code quality.

The role involves developing software for networking devices using C/C++ and Python, along with testing and integration tasks.

Build and ship browser-based 3D interactive features using React, Three.js, and WebGL; integrate frontend with a C++ computational backend on AWS; use AI tools (Claude Code) to accelerate development; prototype AI-powered product features; and collaborate with clinical scientists, UX, ML engineers, and QA.

Build foundational agent infrastructure for an AI assistant: orchestration, tool execution, context management, evaluation, and trust/permissions. Ship reliable, observable, and secure backend systems, launch agentic features, own core infrastructure, participate in on-call, and mentor others.

Design, build, ship, and maintain end-to-end product features across frontend, backend, and data layers. Own projects from definition through production, improve reliability and scalability, collaborate with product and design, mentor engineers, and engage with customers to solve real user problems.

Lead optimization of concurrent systems, scale backend microservices, and collaborate with developers and engineers on deployment for retail solutions.

Design, build, and maintain backend services, REST APIs, databases, and near-real-time and batch data pipelines. Develop a query engine and scalable insights pipelines, collaborate with product and engineering, improve legacy code, and ensure production monitoring, alerting, and tooling for support.