Senior Fullstack Engineer (Backend-Oriented)| HeadFound

About HeadFound:
HeadFound GmbH is a fast-growing AI-powered recruitment technology company with offices in Germany Poland Austria and Switzerland. We build modern SaaS products that combine machine learning automation and user-friendly interfaces to deliver faster and more accurate hiring. We are expanding our engineering team and looking for a Senior Backend Developer to help us scale our core platform ensure system performance and deliver clean reliable backend services.

Job Overview:
We are seeking an experienced Senior FullStack Developer to join our fully remote or hybrid team (based in Poland). In this role you will own the development and maintenance of critical backend services and APIs optimize performance across distributed systems and ensure seamless integration with third-party tools and internal services. Youll work closely with cross-functional teams including DevOps product frontend and architecture to deliver high-quality production-ready code that drives our core business.

Key Responsibilities:
Design implement and maintain scalable REST and GraphQL APIs using and NestJS
Build efficient well-structured database schemas and optimize SQL queries (PostgreSQL)
Integrate third-party services such as payment systems analytics tools and authentication providers
Configure and manage observability tools: OpenTelemetry (OTel) Grafana Azure Monitor
Deploy services using Azure cloud tools (Azure Functions Azure Container Apps)
Contribute to CI/CD pipelines (GitHub Actions) and containerization using Docker and Kubernetes
Conduct code reviews contribute to architecture decisions and uphold backend development best practices
Monitor production environments troubleshoot incidents and support performance tuning
Collaborate with team leads and mentor junior developers to ensure continuous growth and improvement

Key Requirements:

Must-Have:
5 years of backend development experience using NestJS and TypeScript
Strong knowledge of relational databases (especially PostgreSQL)
Hands-on experience integrating external APIs and third-party services
Proficiency with observability and monitoring tools (OTel Grafana Azure Monitor)
Solid experience with Azure cloud infrastructure (Functions Container Apps) CI/CD workflows (GitHub Actions) and container orchestration (Docker Kubernetes)

Nice-to-Have:
Experience with microservices architecture and event-driven systems
Understanding of durable functions and workflow orchestration
Broader experience with the Azure ecosystem
Working knowledge of frontend frameworks like React and state management libraries such as Redux or Zustand (to support full-stack collaboration)
Familiarity with type-safe backend-to-frontend communication using TypeScript

Are You ready
...and of course your benefits:
Fully remote work environment or hybrid model (Wrocław office)
Private healthcare package
Multisport card
Flexible contract types: B2B employment contract or contract of mandate
30 days of paid time off (depending on contract type)
Regular team events workshops and internal knowledge-sharing sessions