Backend Software Engineer – AWS CDK & Edge Platforms

Simon James IT Ltd; Greater London; On-site; GBP 70,000 - 95,000; Full time

Job summary

Simon James IT Ltd in London is seeking a Contract L5 Software Development Engineer to join a globally distributed Edge Platform team. You will design, build, and operate high-scale, mission-critical infrastructure backend services powering the entry point for massive global media streaming requests.

You will work within the Gateway team to deliver scalable, low-latency systems with robust security and operability, including on-call rotations and runbooks.

Responsibilities

• Design, deploy, and scale backend services powering network edge traffic.
• Support high-throughput, low-latency architectures with a focus on availability, security, and operational excellence.
• Participate in on-call rotations and operational practices (dashboards, alarm tuning, runbooks).

Tools

Java

TypeScript

Rust

AWS CDK

EC2

NLB

ElastiCache

Lambda

DynamoDB

DNS

HTTP/TLS

Load balancing

Linux/UNIX

MCP

Job description

Location: London - 5 Days On-site

Duration: 12 Months (Maternity Cover)

The Role

We are recruiting a Contract L5 Software Development Engineer to join a globally distributed Edge Platform team in London. You will work within the Gateway team to design, build, and operate high-scale, mission-critical infrastructure backend services powering the entry point for massive global media streaming requests.

Key Responsibilities

• Design, deploy, and scale backend services powering network edge traffic.
• Support high-throughput, low-latency architectures with a focus on availability, security, and operational excellence.
• Participate in on-call rotations and operational practices (dashboards, alarm tuning, runbooks).

Core Technical Requirements

• Languages: High proficiency in Java and TypeScript.
• Cloud Infrastructure: Strong AWS experience (EC2, NLB, ElastiCache, Lambda, DynamoDB).
• Infrastructure as Code: Hands‑on experience with AWS CDK.
• Networking Fundamentals: Deep understanding of DNS, HTTP/TLS, load balancing, and request routing.
• Systems: Solid experience with distributed systems and Linux/UNIX environments.
• Model Context Protocol (MCP): Hands‑on experience with MCP is ideal; otherwise, a solid conceptual understanding is required.
• Languages: Exposure to Rust.
• Edge & End-User Client Ecosystems: Familiarity with request routing and content delivery architectures servicing end-user devices (smartphones, tablets, smart TVs, streaming media boxes).
• AI-Assisted Workflows: Effective, practical use of AI tools and coding agents to write clean, high-quality code efficiently.