Senior Backend Developer

Senior Backend / Platform Engineer (Golang & Node.js)Hourly Rate: 130 -- 140 PLN/h + VAT (B2B)Location: 100% Remote (Candidates based in Poland)Start Date: ASAPEngagement: Long-term contractLanguage: EnglishAbout the RoleOn behalf of our global partner, we are looking for a seasoned Backend / Platform Engineer to join an enterprise platform initiative.In this role, you will take ownership of building and scaling mission-critical backend services and core platform infrastructure. You will work closely with distributed teams to enhance API ecosystems, automate delivery pipelines, and ensure high system resilience across multi-stage environments.Key ResponsibilitiesService Development: Architect, build, and support robust, production-grade backend systems and platform components.API Design: Build, refine, and maintain scalable REST and GraphQL APIs powering core business applications and third-party integrations.Deployment & Delivery: Ensure reliable continuous integration and deployment workflows across full DTAP (Dev/Test/Acceptance/Prod) pipelines.Data & Platform Engineering: Contribute to the evolution of high-throughput data processing systems and platform stability.Quality & Collaboration: Conduct code reviews, establish engineering best practices, and collaborate with cross-functional technical teams.Core Stack & QualificationsStrong hands-on experience with Go (Golang) and TypeScript / Node.js.Proven expertise in designing and consuming GraphQL and REST APIs.Solid proficiency in relational databases, specifically PostgreSQL.Practical experience with Infrastructure as Code (IaC) and modern CI/CD practices.Background in building scalable, distributed cloud-native architecture.Nice to HaveExperience with workflow automation platforms (e.g., Apache Airflow).Hands-on knowledge of container orchestration (Kubernetes).Familiarity with major cloud providers (AWS / GCP / Azure).Exposure to CDN technologies and edge networking.