Backend Engineer (Golang

As we continue to grow, we are seeking a Backend Engineer in the Netherlands to join our team. The ideal candidate will be responsible for developing and implementing end-to-end solutions, ensuring the smooth functioning of our applications, and improving their performance., System Development

• Design, develop, and maintain high-performance Go microservices using FastHTTP, gRPC, and Protocol Buffers
• Build and optimize distributed client-server architectures that run across customer infrastructure
• Implement real-time ML inference integration with models in C
• Create robust data ingestion pipelines feeding into the Data Warehouse for analytics and ML training

Performance & Reliability

• Optimize systems for sub-millisecond response times under high load
• Implement graceful degradation, circuit breakers, and fallback mechanisms
• Conduct performance profiling, benchmarking, and optimization (CPU, memory, GC tuning)
• Design for fault tolerance and high availability in production environments
• Monitor production systems using Prometheus, structured logging, and custom metrics

Architecture & Best Practices

• Contribute to architectural decisions for scalability and maintainability
• Write clean, maintainable, well-tested code following Go best practices
• Implement comprehensive testing (unit, integration, E2E) with snapshot testing
• Participate in code reviews and mentor junior engineers
• Document system design, APIs, and operational runbooks

Collaboration

• Work closely with ML engineers to integrate models into production systems
• Collaborate with DevOps on containerization (Docker), orchestration (Kubernetes), and CI/CD. Partner with product managers to understand requirements and deliver features
• Participate in on-call rotation for production support

• 5+ years of professional backend engineering experience
• 3+ years of production Go development with a deep understanding of the language
• Strong experience building distributed systems and microservices architectures
• Proven track record of building high-performance, low-latency systems (< 100ms response times)
• Experience with gRPC, Protocol Buffers, and modern API design
• Production experience with containerization (Docker) and orchestration (Kubernetes)

Required Technical Skills

• Expert-level Go programming (concurrency patterns, memory management, performance optimization)
• Distributed systems concepts: service discovery, consensus, eventual consistency, CAP theorem
• High-performance networking: HTTP/2, connection pooling, load balancing
• Database experience: SQL, indexing, query optimization
• Testing: unit tests, integration tests, benchmarking, profiling
• Version control: Git workflows, code review pra

Nice-to-have Skills

• AdTech/RTB ecosystem: SSPs, DSPs, bidding protocols, OpenRTB
• Real-time bidding systems and auction dynamics
• ML model integration: serving, versioning, A/B testing