Senior Platform Engineer: Developer Acceleration & AI

Selby Jennings; Greater London; On-site; GBP 140,000 - 200,000; Full time

Job summary

Selby Jennings is seeking a Senior Software Engineer to shape the future of the internal developer platform and accelerate engineering across teams. You will design scalable platform services, build AI-powered tooling, and deliver distributed REST and gRPC services at scale.

The role requires deep software engineering expertise with Go and Python, hands-on Kubernetes and cloud-native work, and a strong ownership mindset.

Qualifications

• 10+ years of hands-on software engineering experience delivering large-scale, production-ready systems.
• Strong commercial development experience with Go and Python.
• Experience building and integrating AI agents, agentic workflows, and related SDKs.

Responsibilities

• Design and build developer acceleration solutions that enable engineers to move from idea to production faster.
• Develop AI-powered tooling and agent-based workflows that streamline software development, testing, deployment, and operations.
• Architect, build, and maintain scalable platform services used across engineering, research, and investment teams.
• Create and enhance platform capabilities that improve developer experience, reliability, and operational efficiency.
• Build and maintain distributed REST and gRPC services supporting business-critical applications and workflows.
• Drive automation across deployment pipelines, infrastructure provisioning, and operational processes.
• Champion DevOps and Site Reliability Engineering best practices across cloud and on-premise environments.
• Contribute to engineering standards, frameworks, and reusable platform components used across the wider technology organisation.
• Improve observability, resilience, and reliability across the platform ecosystem.
• Participate in production support and incident response, helping maintain highly available systems.

Skills

Go

Python

Kubernetes

REST

gRPC

CI/CD

Terraform

Platform engineering

Tools

Docker

Terraform (IaC)

API design

Job description

Selby Jennings is seeking a Senior Software Engineer to shape the future of the internal developer platform and accelerate engineering across teams. You will design scalable platform services, build AI-powered tooling, and deliver distributed REST and gRPC services at scale.

The role requires deep software engineering expertise with Go and Python, hands-on Kubernetes and cloud-native work, and a strong ownership mindset.