Top Software Engineer Jobs in Warsaw

Own quarterly engineering goals for the Recoveries team, delivering scalable backend systems that maximize charged-off loan recovery and reconcile partner discrepancies. Lead engineers through ambiguous problems, collaborate with product, design, analytics, and risk stakeholders, and ensure operational reliability through metrics, monitoring, on-call support, and failure handling. Establish quality standards, guide technical design and implementation, contribute to large codebases, and mentor engineers through feedback and technical leadership.

As a Senior Software Engineer, you will integrate DPU hardware, execute validation plans, handle automation scripts, and collaborate with teams on networking features and testing.

Build, deploy, and maintain reliable backend systems supporting social network integrations at scale. Responsibilities include writing tested code, collaborating with product and engineering teams, reviewing code and designs, monitoring production services, troubleshooting outages, improving performance, and managing technical debt. The role also involves working with APIs, databases, messaging queues, Agile processes, architecture discussions, and cross-functional feature delivery.

Senior Angular Software Engineer responsible for architecting, developing, deploying, and supporting enterprise-scale business intelligence applications for Prime Services. The role involves Angular development, SQL and relational databases, CI/CD automation, Git, Docker, Kubernetes, and OpenShift. Responsibilities include technical leadership, mentoring, architectural decision-making, upstream and downstream system integration, production support, and collaboration with business stakeholders. Preferred experience includes financial analytics, PnL attribution, post-trade processing, Apache Pinot, Unix/Linux, shell scripting, and Agile/Scrum.

Develop and refine machine learning and LLM-based solutions, including agent architectures, embeddings, clustering, summarization, and automated workflows. Design experiments and metrics to evaluate model quality, build Java and Python services hosted on Snowflake and Kubernetes, troubleshoot systems, and collaborate with product, design, and partner teams to deliver features and shape product direction.

Build and guide scalable full-stack systems, developer-facing web applications, desktop tools, backend services, APIs, UI component libraries, and integrations supporting Netflix’s game lifecycle. Own features from ideation through deployment, improve existing developer tools, collaborate cross-functionally, operate services, participate in on-call support, and lead incident reviews. The role emphasizes developer experience, reusable design, strategic technical decisions, and practical use of AI coding tools and agents.

Develop mission-critical onboard software for autonomous vehicles, collaborating with systems, hardware, and product teams. Solve challenges involving hardware-failure resilience, CPU and heat reduction, and data selection and offload. The role requires backend or infrastructure experience with distributed, large-scale systems and involves debugging and close collaboration with hardware engineers.

Design and develop robust full-stack applications using Java and Spring Boot. Improve architecture, scalability, infrastructure, CI/CD pipelines, performance, reliability, and resilience. Apply automated testing and high-quality engineering practices, while proactively troubleshooting production issues and ensuring long-term system stability.

Design, build, and operate low-latency, strongly consistent distributed database systems. Implement replication, consensus, caching, and performance improvements. Run and maintain production services including on-call rotation, collaborate on roadmaps and system designs, and write performance-critical code in systems languages.

Develop and maintain a large-scale AdTech platform through backend and frontend development. Responsibilities include using Java and Spring Boot, working with relational and non-relational databases, integrating APIs and third-party services, researching core technologies, deploying with AWS, Docker, and Kubernetes, and resolving technical challenges in distributed enterprise systems.

Build and maintain backend Collections platform to manage delinquent loans, develop recovery strategies, ensure high availability and reliability, implement monitoring and metrics, support operations and on-call, collaborate with product, risk, design and analytics, write well-tested extensible code, perform code reviews and debugging, and participate in team growth activities.

Develop and modernize full-stack applications using C#, .NET, React, and related technologies. Design REST APIs and microservices, build data-access layers with Entity Framework Core and SQL Server, and contribute to architecture, testing, code reviews, and Agile delivery. Maintain legacy systems while incrementally modernizing functionality, optimize application performance, and collaborate with UX, product, QA, research, data, and operations teams. Integrate AI technologies into applications and support clean, maintainable, scalable software development.

The Infrastructure Software Engineer will build and optimize systems managing vast data, collaborate with teams for reliability, and handle operational issues.

Join the Collections backend team to design, build, and maintain scalable, highly available systems that manage delinquent loans and recovery strategies. Collaborate with product, risk, and engineering teams to implement reliable, well-tested backend solutions, debug large codebases, and contribute to team growth and operational excellence.

Own and scale a live production backend supporting real-time communication between apps, animation models, and LLM providers. Design APIs, WebSockets, data storage for companion memory and conversation state, and Cloudflare Workers infrastructure. Improve latency, throughput, cost, observability, alerting, incident response, and documentation while collaborating with the team to ship features end to end.

Design, standardize, and implement secure development frameworks and automation for network security. Build modular automation, APIs, and CI/CD pipelines to scale network controls; collaborate with cloud, infrastructure, and incident response teams to maintain reliability, testing, and operational excellence across on-prem and cloud network protections.

The Senior Infrastructure Software Engineer will build scalable systems, manage large data, and innovate solutions for performance and reliability, impacting millions of users.

The Software Developer will design and develop web applications, improve system reliability, and collaborate on architecture and deployment strategies.

Build and operate developer platforms, tooling, AI agents, internal services, CI/CD pipelines, and AWS infrastructure. Develop production-quality automation using TypeScript, JavaScript, or Python; manage Infrastructure-as-Code; improve platform reliability, observability, security, and developer experience; and partner with application teams to standardize delivery workflows and reusable engineering practices.

Develop platform software for high-performance networking hardware. Responsibilities include Linux kernel and user-space code, IOMMU and ASIC integration, hardware register access, configuration management services, routing protocol agents in C/C++, and automated Python-based testing. Interns receive mentorship, technical training, hackathon opportunities, and may receive a full-time offer after graduation.

Build and evolve Rerun’s open-source viewer, cross-language SDKs, and integrations with Rerun Hub. Develop high-performance interfaces for large-scale multimodal data, optimize workflows across desktop and web, make full-stack architecture decisions, and collaborate with backend, Hub, design, customers, and the open-source community. The role involves UI development, rendering, data handling, infrastructure, real-time applications, visualization, and performance optimization.

Develop and optimize software solutions for industrial additive manufacturing in an agile team. Responsibilities include designing algorithms, data structures, and software subsystems; debugging complex issues; benchmarking and improving performance, stability, efficiency, and scalability; and contributing to software quality and documentation. The role uses Vue.js, TypeScript, Python, C++, MongoDB, Docker, and automated development tools.

Develop and maintain automated tests for Veeam products, enhance testing frameworks, design and implement test cases, analyze source code and results, manage defects, support automated testing systems, and build testing infrastructure. Collaborate with software development teams while working primarily with C#, .NET, PowerShell, and CI/CD tools.

Design, implement, test, review, and deploy Scala software features end to end. Contribute to distributed ledger technology and critical financial market infrastructure while maintaining strong code quality, test coverage, and documentation. Collaborate with globally distributed Agile teams, participate in architecture and technical decisions, and communicate effectively across technical and non-technical audiences.

Build and maintain production systems for AI music products, including backend services, APIs, workers, media pipelines, model inference infrastructure, queues, scheduling, storage, and observability. The role requires debugging across software and infrastructure boundaries, optimizing distributed systems, and owning technical projects end-to-end. Relevant experience includes media processing, ML infrastructure, cloud platforms, Kubernetes, Docker, Terraform, and large-scale data pipelines.