April 11, 2026
Senior Backend / Platform Engineer
Senior • Remote
4,400 - 6,200 USD
Krakow, Poland
Our client is a leading European tech company building scalable, high-performance backend services and platforms for enterprise and AI-driven applications.
Our mission is to combine cutting-edge backend technologies with reliable, automated DevOps practices, ensuring secure, maintainable, and high-quality systems for our clients.
As a Senior Backend Engineer (Python / FastAPI), you will play a key role in designing, developing, and deploying backend services, internal tools, and platform infrastructure. You will collaborate closely with product teams, frontend engineers, and DevOps to deliver robust, scalable, and production-ready solutions.
Responsibilities:
Develop and maintain backend services using Python (FastAPI)
Work with PostgreSQL to design schemas, optimize queries, and ensure data integrity
Build and maintain internal CLI tools using TypeScript
Manage a monorepo using Nx
Manage deployment workflows and infrastructure using Kubernetes (K8s) and Helm
Implement CI/CD pipelines using GitHub Actions for automated testing and deployment
Collaborate with cross-functional teams to improve system architecture, reliability, and scalability
Troubleshoot and optimize performance across backend services and infrastructure
Requirements:
5+ years of experience in backend development in a production setting with real users
Strong proficiency in Python, especially building APIs with FastAPI
Solid experience with relational databases, preferably PostgreSQL
Experience with TypeScript / Nx for tooling or automation tasks
Hands-on experience with Kubernetes (K8s) and Helm
Familiarity with containerization best practices (Docker)
Experience designing and maintaining CI/CD pipelines (GitHub Actions or similar)
Strong problem-solving skills, system design thinking, and attention to detail
Exposure to observability, logging, and monitoring tools
Nice to Have:
Experience with cloud platforms (AWS, GCP, Azure)
Exposure to observability, logging, and monitoring tools
Experience integrating backend systems with frontend or AI/ML pipelines
Technology Stack:
Backend: Python (FastAPI), PostgreSQL
DevOps / Platform: Kubernetes (K8s), Helm, CI/CD (GitHub Actions)
Internal tooling: TypeScript / Nx for CLI and automation tools
Other: Docker, cloud infrastructure (AWS/GCP/Azure), monitoring and observability
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Krakow, Poland
21,000 - 24,500 PLN
🏢 Summary: Senior Backend Engineer role focused on building and scaling a cloud-based SaaS platform using modern .NET services and REST APIs. The position involves designing distributed systems, improving reliability and observability, and working with cloud and container environments. You will contribute to technical decisions and engineering best practices within a collaborative team. 🗂️ Requirements: 5+ years backend development experience, Experience with SaaS and web applications, Strong knowledge of C#, Strong knowledge of modern .NET/.NET Core, Solid computer science fundamentals, Experience with distributed systems design, Experience with cloud platforms, Experience with containers and orchestration, Understanding of concurrency and performance, Knowledge of authentication and authorization mechanisms 📃 Skills: C#, .NET, .NETCore, REST, Azure, AWS, GCP, Kubernetes, Kafka, RabbitMQ, SQS, Docker, SQL, HTML, CSS, JavaScript 🏢 Description: We’re hiring a Senior Backend Engineer to help build and scale a cloud-based SaaS platform. You’ll work on modern .NET services and APIs, improve reliability and observability, and contribute to technical decisions as part of a collaborative engineering team. Responsibilities: Build and maintain backend services and REST APIs in C# / .NET (.NET Core). Design scalable solutions for distributed systems (async workflows, messaging, integrations). Work with cloud services (Azure/AWS/GCP) and container environments (e.g. Kubernetes). Strengthen system reliability with logging, metrics, tracing, and monitoring. Support secure access patterns: authentication/authorization, API gateway concepts. Contribute through code reviews, good engineering practices, and automation. Requirements: 5+ years of backend development experience, including SaaS and web applications. Strong knowledge of C# and modern .NET + solid CS fundamentals. Familiarity with containers/orchestration and cloud-native approaches. Experience with some of: Kafka/RabbitMQ/SQS, workflow orchestration, job scheduling, search. Good understanding of concurrency and performance. Strong communication skills; Agile/Scrum is a plus. Bonus: basic front-end knowledge (HTML/CSS/JS).