42 - Senior Backend Developer (Go)

Our client, an energy trading company, is looking for a Senior Backend Developer to make their backend systems more reliable and scalable. You will work in a test-driven, AI-assisted environment where agentic coding tools are part of daily development. The ideal candidate is a seasoned engineer with deep Go experience, strong system design skills and a track record of building high-throughput, low-latency systems.

Key Responsibilities

• Design scalable backend systems and services with a focus on performance, maintainability and security
• Use AI development tools such as Claude Code, Codex and Gemini CLI to speed up delivery and raise code quality
• Turn business requirements into clear technical specifications that AI agents can execute
• Review pull requests from developers and AI agents
• Work with product managers, frontend developers and other stakeholders on business-critical features
• Champion test-driven development and automated test coverage
• Build and maintain relational, key-value and time-series databases
• Apply security best practices and address vulnerabilities and compliance requirements
• Monitor and improve latency, throughput, scalability and resource efficiency
• Mentor other developers on the team

Required Skills and Experience

• 10+ years of backend development, including architecture and system design
• Strong Go skills; Rust is a plus
• Experience tuning performance in high-throughput, low-latency systems
• Database schema design and optimisation
• Solid knowledge of distributed systems and high data throughput
• Familiarity with AI-assisted development tools
• Experience with TDD and CI/CD pipelines
• Knowledge of security practices such as OWASP and secure coding
• Hands-on experience with cloud-native environments, including Kubernetes, containers and service meshes
• Excellent English