Top Software Engineer Jobs in Warsaw

Develop and launch scalable backend systems powering Affirm Card checkout and in-app experiences. Break projects into deliverable phases, collaborate with product, design, and analytics, monitor system operations and availability, participate in on-call support, write tested and maintainable code, debug large codebases, conduct code reviews, and contribute to team development.

Lead quality engineering and test automation for Mastercard’s developer portal and related tools. Responsibilities include designing Java automation frameworks, defining testing and release strategies, improving CI/CD and development workflows, analyzing production issues, enhancing reliability and observability, and mentoring engineers. The role partners across teams to drive quality standards, automation adoption, and scalable software delivery.

Leads quality engineering and test automation for Mastercard’s developer portal and related services. Defines testing strategies, develops Java automation frameworks, improves CI/CD and release quality, analyzes production issues, and drives reliability, observability, and shift-left testing. Partners with engineering and product teams, influences architecture and engineering standards, and mentors engineers across multiple teams.

Lead quality engineering and test automation for Mastercard’s developer portal and related tools. Responsibilities include defining quality strategy, building Java automation frameworks, testing APIs, UIs, distributed systems, and cloud-native services, improving CI/CD and release quality, analyzing production issues, influencing architecture, and mentoring engineers across teams.

Lead quality engineering and test automation for Mastercard’s developer portal and related tools. Define testing strategies, build Java automation frameworks, improve CI/CD and release quality, identify risks, lead root-cause analysis, and promote shift-left testing. Collaborate with engineering and product teams, influence architecture and standards, and mentor engineers across teams while ensuring reliable, scalable, production-ready software.

Lead quality engineering and test automation for Mastercard’s developer portal and related tools. Design Java-based automation frameworks, define testing and release strategies, identify risks, improve CI/CD and deployment confidence, analyze production issues, and promote shift-left quality practices. Partner with engineering and product teams, contribute to architecture decisions, mentor engineers, and establish scalable quality standards across teams.

Leads quality engineering and test automation for Mastercard developer platforms. Defines testing strategies, builds Java automation frameworks, improves CI/CD and release quality, analyzes production issues, and drives reliability, observability, and shift-left testing. Partners with engineering and product teams, influences architecture and standards, and mentors engineers across multiple teams.

Lead end-to-end development and operation of secure, scalable API connectivity services for financial institutions across Europe. Design backend systems, solve complex technical problems, make architecture decisions, ensure reliability and testing, support production systems, automate engineering workflows, collaborate with product and security teams, and mentor engineers. The role uses C#, .NET, Azure, AWS, PostgreSQL, and related cloud technologies in banking and open-banking environments.

Lead end-to-end development and production operation of secure, scalable API connectivity services for financial institutions. Design backend systems, make technical decisions, improve reliability and automation, implement comprehensive testing, uphold engineering standards, collaborate with Product, Security, Architecture, and SRE teams, and mentor engineers. The role requires strong cloud, backend, API, production support, and open banking expertise across Azure and AWS environments.

Lead end-to-end development and operation of secure, scalable API connectivity services for financial institutions across Europe. Design backend systems, solve complex technical problems, make architecture decisions, implement testing and automation, improve reliability and observability, support production systems, collaborate with stakeholders, review code, and mentor engineers. The role requires strong cloud, backend, payments, and open banking expertise across Azure and AWS environments.

Lead end-to-end development and production operation of secure, scalable API connectivity services for financial institutions. Design backend systems, solve complex technical problems, make architecture decisions, ensure reliability and quality, implement comprehensive testing and observability, automate engineering workflows, collaborate with product and security teams, and mentor engineers.

Lead end-to-end development and operation of secure, scalable API connectivity services for financial institutions across Europe. Design backend systems, make technical decisions, implement testing and automation, support production reliability, collaborate with Product, Security, Architecture, and SRE teams, and mentor engineers. The role focuses on cloud-based systems using C#, .NET, Azure, AWS, PostgreSQL, and related technologies in open banking and payments environments.

Lead end-to-end development and production support for secure, scalable API connectivity services across European financial institutions. Design backend systems, drive technical decisions, implement testing and observability, improve automation and reliability, collaborate with Product, Architecture, Security, and SRE teams, and mentor engineers. The role requires strong cloud, backend, payments, and open banking expertise across Azure and AWS environments.

Develop and extend measurement and reporting systems for creator marketing data. Responsibilities include building AI-enabled functionality and MCP servers, translating analytical requirements into SQL and application logic, managing production schema migrations, implementing test-driven development, solving complex data problems, and using AI-assisted coding tools. The role requires TypeScript and Node.js expertise, SQL proficiency, analytical system experience, production deployment experience, Docker, CI, and strong communication skills.

Build resilient backend services and streaming pipelines that integrate social platform APIs and process large-scale creator data. Develop with Python and Go, using Kafka and AWS, modernize legacy systems, support production incidents, and improve performance. Build LLM-based agents and MCP tools for engineering automation. Collaborate across Product, Data, and Engineering while applying strong testing, observability, CI/CD, API integration, and database practices.

Leads AI platform experience and enterprise adoption by creating reusable blueprints, starter kits, reference architectures, and developer interfaces. Provides technical consulting, evaluates use cases, mentors engineering communities, and translates developer feedback into platform roadmaps. Establishes software delivery standards incorporating responsible AI, security, compliance, and GxP validation. Partners with product, security, quality, and business stakeholders to promote AI offerings and improve platform adoption.

Build and scale Corsearch’s AI-driven brand protection SaaS platform. Responsibilities include developing end-to-end product features, optimizing Python code and PostgreSQL queries, integrating AI and automation workflows, maintaining unit tests and CI/CD pipelines, and collaborating with product, UX, QA, data science, and brand protection teams. The role requires strong Python backend development, relational database expertise, cloud and DevOps experience, troubleshooting ability, and professional English communication skills.

Lead the architecture, development, deployment, and support of distributed Java backend systems for Prime Finance risk and business intelligence. Build high-throughput, low-latency services using Spring, SQL Server, Redis, Kafka, and Apache Pinot. Drive technical decisions, mentor engineers, improve CI/CD and OpenShift deployments, integrate data sources, and troubleshoot production issues while applying financial risk domain knowledge.

Develop and modernize full-stack .NET solutions for shipment booking systems. Responsibilities include designing interfaces, building scalable services, optimizing code and databases, troubleshooting distributed systems, improving application security, conducting code reviews and testing, and delivering projects collaboratively across global engineering teams.

Design and deploy AI-driven features, autonomous agents, and scalable workflows for Cisco Webex Partner Hub. Build production systems using LLMs, vector databases, and agentic frameworks; establish standards for evaluation, prompt engineering, reliability, security, latency, and cost efficiency. Collaborate with product and data science teams, evaluate emerging AI technologies, architect cloud-based platforms, and mentor junior engineers while guiding technical initiatives.

Design, implement and maintain high-performance, highly available Java microservices in a Scrum team. Work on scalable systems processing large data volumes with low latency, ensure code quality and testability, and collaborate across the team to deliver features and improvements.

Build and scale Flix’s customer service platform, including AI chatbots, voice agents, help center tools, and knowledge bases. Develop Python backend services and TypeScript/React frontends, create Twilio voice and webchat functions, manage AWS infrastructure with Terraform, integrate AI and third-party platforms, and monitor production systems. The role requires independent architectural decision-making, iterative delivery, and comfort with ambiguous requirements in a B2B freelance engagement.

Build and support batch and streaming data pipelines, curated datasets, and Lakehouse platform capabilities. Responsibilities include data modeling, transformation, optimization, quality validation, reconciliation, testing, monitoring, and production support. The role partners with engineers and data consumers to deliver reliable data products for analytics, operational decision-making, and AI use cases.

Develops custom software and data platform solutions under team guidance. Completes assigned development tasks, troubleshoots straightforward technical issues, works with data integrations and pipelines, applies software engineering and Agile practices, and follows validation, quality, and regulatory requirements. The role emphasizes learning, collaboration, transparent communication, and growth across programming, databases, cloud services, DevOps, and data engineering.

Develop software for autonomous UAVs operating without GPS or communications. Build embedded Linux systems on Raspberry Pi, integrate autopilots, cameras, and onboard devices, and create computer vision pipelines for detection, tracking, and image processing. Develop internal visualization and test-data analysis tools while applying software engineering practices including Git, CI, testing, and deployment.