We are looking for a Senior Backend Engineer (GoLang) with deep Go expertise to join the Gateways team. This is a hands-on individual contributor role with expectations to own subsystems end-to-end and drive technical direction in your area of ownership.
The Gateways team owns Workato's API management, gateway, and routing infrastructure - the layer that sits between external consumers and the platform's core services. Our scope includes the classic API Management (APIM) product, an AI Gateway for LLM traffic management, and an MCP Gateway for Model Context Protocol integration. We operate at high scale, low latency, and with strict availability requirements.
Responsibilities
- Design, build, and operate high-performance gateway and routing components in Go
- Own technical direction for your area: author design documents, lead architectural reviews, evaluate trade-offs, and drive decisions to conclusion
- Build and evolve infrastructure for authentication, caching, rate limiting, request queuing, and traffic shaping
- Collaborate with SRE, Infrastructure,



and Platform teams to meet availability, scalability, and observability requirements
- Stay current with relevant technologies, protocols, and industry patterns; present findings and proposals for architectural review
- Deliver features end-to-end: from design through production rollout and ongoing maintenance

Requirements
Must Have
- 10+ years of professional software engineering experience
- 5+ years of hands-on backend development in Go, with strong command of concurrency patterns, performance profiling, and idiomatic design
- Deep understanding of Go internals: scheduler, garbage collector, memory model, and runtime behavior under load
- Strong systems programming foundation: understanding of how things work below the application layer
- Deep network knowledge: TCP connection lifecycle, TLS/mTLS handshake and termination, HTTP/1.1, HTTP/2, HTTP/3 (QUIC), WebSocket, SSE
- Applied cryptography: symmetric/asymmet

📌 Senior Backend Engineer (Barcelona)
🏢 Workato
📍 Barcelona