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# Senior Backend Engineer (Go

- **Company:** Workato
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Proxy Servers, Server Applications, Application Layers, Microsoft Azure, Batch Processing, Cloud Computing, Profiling, Code Review, Computer Networks, Databases, Software Design Documents, Hypertext Transfer Protocols (HTTP), Key Management, Message Broker, Redis, Ruby, Software Engineering, System Programming, Transmission Control Protocol (TCP), WebSocket, Load Balancing, Large Language Models, Caching, Backend, Rate Limiting, Kubernetes, Information Technology, Low Latency, Live Streaming, Api Gateway, Api Management, Docker, Golang
- **Published:** August 14, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-go-en-barcelona-ID-367072626

## About the Role

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/asymmetric encryption, certificate chains of trust, key management, signing and verification Proven track record of designing and scaling distributed, highly available systems Solid understanding of large-scale web infrastructure: load balancers, reverse proxies, application servers, databases, message brokers, caching layers, and observability stacks Experience authoring system/architecture design documents and leading technical reviews Ability to identify bottlenecks at both the code level and the system level, and propose pragmatic solutions Working knowledge of Kubernetes concepts and deployment patterns BS/MS in Computer Science, Engineering, or equivalent demonstrated experience Nice to Have
Reading-level familiarity with Ruby (on Rails) Familiarity with AI/LLM serving infrastructure: model proxying, token metering, streaming protocols Experience with Docker, container orchestration, and cloud infrastructure (AWS, Azure, or GCP) Experience with Redis-based caching and pub/sub patterns Exposure to API gateway or service mesh internals (e.G., Envoy, Kong, custom proxies) Integration with third-party REST/gRPC APIs at scale (throttling, retries, circuit breaking, batch processing) Contributions to open-source projects Soft Skills Comfortable working in a globally distributed team across multiple timezones (the team spans Singapore, Europe, and the US) Strong written and spoken English - sufficient for design discussions, code reviews, and cross-team collaboration Full-cycle product delivery mindset: from problem framing through production and maintenance Open to experimentation; pragmatic about adopting new technologies 10+ years of professional software engineering experience,
5+ years of hands-on backend development in Go, Deep understanding of Go internals (scheduler, garbage collector, memory model), Strong systems programming foundation, Deep network knowledge (TCP, TLS/mTLS, HTTP/1.1, HTTP/2, HTTP/3, WebSocket, SSE), Applied cryptography knowledge (symmetric/asymmetric encryption, key management), Proven track record of designing and scaling distributed, highly available systems, Solid understanding of large-scale web infrastructure (load balancers, reverse proxies, message brokers), Experience authoring system/architecture design documents and leading technical reviews, Ability to identify bottlenecks at code and system levels, Working knowledge of Kubernetes concepts and deployment patterns, BS/MS in Computer Science, Engineering, or equivalent experience 10+ years of professional software engineering experience, 5+ years of hands-on backend development in Go, Deep understanding of Go internals (scheduler, garbage collector, memory model), Strong systems
programming foundation, Deep network knowledge (TCP, TLS/mTLS, HTTP/1.1, HTTP/2, HTTP/3, WebSocket, SSE), Applied cryptography knowledge (symmetric/asymmetric encryption, key management), Proven track record of designing and scaling distributed, highly available systems, Solid understanding of large-scale web infrastructure (load balancers, reverse proxies, message brokers), Experience authoring system/architecture design documents and leading technical reviews, Ability to identify bottlenecks at code and system levels, Working knowledge of Kubernetes concepts and deployment patterns, BS/MS in Computer Science, Engineering, or equivalent experience #J-*****-Ljbffr

## Description

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/asymmetric encryption, certificate chains of trust, key management, signing and verification Proven track record of designing and scaling distributed, highly available systems Solid understanding of large-scale web infrastructure: load balancers, reverse proxies, application servers, databases, message brokers, caching layers, and observability stacks Experience authoring system/architecture design documents and leading technical reviews Ability to identify bottlenecks at both the code level and the system level, and propose pragmatic solutions Working knowledge of Kubernetes concepts and deployment patterns BS/MS in Computer Science, Engineering, or equivalent demonstrated experience Nice to Have Reading-level familiarity with Ruby (on Rails) Familiarity with AI/LLM serving infrastructure: model proxying, token metering, streaming protocols Experience with Docker, container orchestration, and cloud infrastructure (AWS, Azure, or GCP) Experience with Redis-based caching and pub/sub patterns Exposure to API gateway or service mesh internals (e.G., Envoy, Kong, custom proxies) Integration with third-party REST/gRPC APIs at scale (throttling, retries, circuit breaking, batch processing) Contributions to open-source projects Soft Skills Comfortable working in a globally distributed team across multiple timezones (the team spans Singapore, Europe, and the US) Strong written and spoken English - sufficient for design discussions, code reviews, and cross-team collaboration Full-cycle product delivery mindset: from problem framing through production and maintenance Open to experimentation; pragmatic about adopting new technologies 10+ years of professional software engineering experience, 5+ years of hands-on backend development in Go, Deep understanding of Go internals (scheduler, garbage collector, memory model), Strong systems programming foundation, Deep network knowledge (TCP, TLS/mTLS, HTTP/1.1, HTTP/2, HTTP/3, WebSocket, SSE), Applied cryptography knowledge (symmetric/asymmetric encryption, key management), Proven track record of designing and scaling distributed, highly available systems, Solid understanding of large-scale web infrastructure (load balancers, reverse proxies, message brokers), Experience authoring system/architecture design documents and leading technical reviews, Ability to identify bottlenecks at code and system levels, Working knowledge of Kubernetes concepts and deployment patterns, BS/MS in Computer Science, Engineering, or equivalent experience 10+ years of professional software engineering experience, 5+ years of hands-on backend development in Go, Deep understanding of Go internals (scheduler, garbage collector, memory model), Strong systems programming foundation, Deep network knowledge (TCP, TLS/mTLS, HTTP/1.1, HTTP/2, HTTP/3, WebSocket, SSE), Applied cryptography knowledge (symmetric/asymmetric encryption, key management), Proven track record of designing and scaling distributed, highly available systems, Solid understanding of large-scale web infrastructure (load balancers, reverse proxies, message brokers), Experience authoring system/architecture design documents and leading technical reviews, Ability to identify bottlenecks at code and system levels, Working knowledge of Kubernetes concepts and deployment patterns, BS/MS in Computer Science, Engineering, or equivalent experience #J-*****-Ljbffr


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