Top Software Engineer Jobs in Warsaw

Lead design and develop scalable, cloud-native API platform services. Drive architecture and implementation, deliver and iterate features, ensure automation (build/deploy/config/monitor), contribute to open-source client libraries, mentor engineers, support customer integrations, and enforce API security and engineering excellence in an Agile global team.

Develop and optimize backend systems for a trading platform, ensuring scalability, security, and high performance while collaborating with cross-functional teams.

Build and maintain full-stack treasury applications: design React/TypeScript single-page UIs and ASP.NET Core backend services, optimize performance for large datasets, implement REST APIs and server-side pagination, ensure reliability via testing and CI/CD, collaborate with stakeholders, resolve incidents, and mentor the Warsaw engineering team.

You will work in an agile team focused on the SimCorp Data Connectivity product, implementing solutions, improving processes, and supporting the team while collaborating with international colleagues.

The Software Engineer will design and develop internal systems for payment operations, ensuring accurate transaction processing and improving operational efficiency. Responsibilities include building reconciliation infrastructure and monitoring systems in collaboration with various teams.

Develop and maintain production applications and data pipelines to support early drug discovery. Build APIs, backend services, and UIs; implement ETL workflows, data validation, and database integrations; collaborate with scientists and senior engineers; participate in code reviews, CI/CD, monitoring, and incident response to ensure reliable data-driven research systems.

Contribute across front-end and back-end (SOA) in a Scrum team: design, implement, test (automation and manual), own feature delivery, improve CI/CD and pipelines, participate in architecture decisions, and mentor junior engineers.

Develop and maintain the Engage healthcare solution across backend, web, mobile, and desktop. Design REST APIs, event-driven integrations, and data access. Diagnose production issues, modernize architecture and tests, maintain Windows desktop app, and use AI assistants in daily development while collaborating in a remote scrum team.

Build and own backend and frontend customer-facing journeys for signup, authentication, account management, billing, and cloud marketplace integrations. Develop and operate reliable services and third-party integrations across AWS, GCP, and Azure. Maintain security, privacy, observability, and documentation while adopting existing systems. Collaborate with product, design, finance, and customer-facing teams in a distributed environment, using AI-assisted development tools and participating in on-call after ramp-up.

Develop JavaScript foundations and developer-experience tooling across Netflix. The role focuses on TypeScript, dependency management, supply-chain security, Node.js packaging and publishing, reusable libraries, workflow improvements, architectural solutions, and technology adoption. It requires collaboration across internal teams and the broader JavaScript community, aligning stakeholders and evolving Netflix’s JavaScript strategy across browser and server ecosystems.

Develop and serve AI platforms, improve AI functionality, solve ambiguous technical problems, and collaborate with research, engineering, business, and product teams. The role involves production-quality backend development, API and SDK construction, software engineering best practices, mentoring, leadership, and potentially deploying machine learning models through MLOps.

The Senior Software Engineer will design and implement scalable data streaming solutions, develop DevOps tools, and improve system usability and observability.

Own end-to-end delivery of major projects for strategic customers, designing architectures, building integrations, and solving complex technical challenges. Collaborate closely with customer engineers and executives to apply ElevenLabs technologies effectively. The role requires strong Python development, software architecture, API integration, communication, and problem-solving skills, with a customer-facing technical focus.

Develop and architect full-stack .NET applications, define interfaces, optimize and refactor code, analyze complex requirements, and improve quality through reviews and testing. Troubleshoot production issues, implement secure programming patterns, estimate project dependencies, and mentor engineers. Collaborate with product managers, stakeholders, and global teams to deliver scalable customer solutions.

Develop and maintain 5G RAN software across L1/L2/L3 protocol layers, port and optimize systems for ARM and x86 platforms, integrate licensing, support synchronization technologies, troubleshoot deployments, document interfaces, and collaborate with hardware and QA teams on testing and real-time telecom solutions.

Design, implement, and operate backend features and data-indexing pipelines for a large-scale Search-as-a-Service platform. Optimize distributed search cluster architecture, sharding, throughput, and low-latency real-time data movement. Collaborate on design, code reviews, testing, automation, and operational improvements, and contribute to intelligent natural-language search interfaces.

Build and scale developer productivity tools and platforms (backend, data, APIs, UX). Collaborate with customers and PMs, write design docs, ensure reliability, model data, and operate services at scale.

Design and execute fleet-wide code and infrastructure migration campaigns. Build automation and tooling (including AI-assisted code modification and orchestration), author technical designs, partner with platform teams, instrument telemetry and dashboards, and drive Paved Path adoption to reduce toil and technical debt.

Build and maintain scalable data pipelines and software to ingest, process, aggregate, visualize, and analyze system insights and productivity metrics. Collaborate with cross-functional teams to deliver distributed processing solutions, reporting, and experimentation infrastructure, prioritizing data quality and engineering excellence.

Design, build, test, deploy, and operate end-to-end full‑stack solutions including backend services, APIs, and modern web UIs. Revamp and enhance partner-facing tools for Smart TV and partner payment experiences, collaborate with product and design, troubleshoot microservices, improve legacy systems, and uphold high engineering standards through testing and scalable practices.

Design, build, and operate resilient, high-scale, low-latency distributed microservices for production planning or media workflows. Implement gRPC/GraphQL/REST APIs, drive architectural decisions, ensure observability, performance, and fault tolerance, collaborate with cross-functional partners, participate in on-call rotation, and lead incident reviews. Knowledge of media encoding pipelines and AI-assisted tools is a plus.

Build scalable growth-focused software, including onboarding flows, personalization engines, viral loops, experimentation systems, and analytics instrumentation. Collaborate with Product, Design, Marketing, Data Science, and Engineering to improve growth metrics. Develop high-quality frontend or full-stack applications, optimize performance and accessibility, maintain automation and continuous delivery, and apply AI and machine learning to improve engagement, retention, and personalization.

Design, build, and operate scalable test platforms for synthetic identities, test data seeding, mocking, deterministic validation, and load testing. Improve test signal quality, reliability, observability, and operational maturity. Lead medium-to-large projects end-to-end, write maintainable code, produce async technical artifacts, review designs, and mentor engineers to increase developer productivity and scale testing infrastructure.

Design, build, and optimize backend services for data gathering, processing, and delivery. Define and maintain service contracts, ensure high test coverage, observability, and documentation. Make architectural decisions for distributed systems, collaborate with product teams, and maintain/ improve an existing Kotlin/Java codebase.

Join Engineering Foundations to build and maintain core platform services. Work on high-load systems, implement cloud-native infrastructure (AWS, Kubernetes, Terraform), improve observability and reliability, and support SRE practices, capacity planning, SLIs/SLOs, and CI/CD.