10 of 10 Backend Developer Jobs in the City of London

Senior Backend Developer - Ruby/Elixir Location: London - Remote Outside IR35 Immediate starter. We're supporting a technology business undertaking a major modernization programme and are looking for a Senior Backend Developer to drive a large-scale refactoring initiative across a complex, multi-service platform. This … with pragmatic technical leadership to deliver safer, faster, and more scalable services. What you'll be doing: Lead end-to-end refactoring across multiple backend technology stacks Redesign and modernise the messaging and event architecture Improve database performance, reliability, and schema design Reduce technical debt while keeping business disruption ...

Senior Backend Developer - Node Crypto Payments Remote- (HQ: London) 50k-100k Plexus has a great opportunity with one of our long-term clients in the global payments space. They are an established next-generation payments company, allowing users to accept payment methods across 13 different blockchain networks. They … looking for senior backend developer to join the team to working with node to build out their platform further. Responsibilities: Design & build wallet backend services, a rchitect and implement scalable Node.js services for wallet operations Blockchain integration, w ork with full nodes, third-party RPC providers ...

Senior Backend Developer - Ruby/Elixir Location: London - Remote Outside IR35 Immediate starter. We're supporting a technology business undertaking a major modernization programme and are looking for a Senior Backend Developer to drive a large-scale refactoring initiative across a complex, multi-service platform click ...

Senior Backend Developer - Node Crypto Payments Remote- (HQ: London) 50k-100k Plexus has a great opportunity with one of our long-term clients in the global payments space. They are an established next-generation payments company, allowing users to accept payment methods across 13 different blockchain networks. They … looking for senior backend developer to join the team to working with node to build click apply for full job details ...

Role Name : Backend Developer Type : Contract – Inside IR35 Location : London, Canary Wharf 3x/week Hybrid/Remote : Hybrid – 3 days per week Duration: 1 year + option to extend Job Description: Top Must-Haves: Python Postgres SQL API Developent (REST) Good CS and OOP fundamentals. Experience with … SDLC and design of new greenfield solutions Responsibilities: • Design sophisticated backend components, services, platforms, and Restful APIs for seamless communication with the front end. • Continuously reviewing the services and components and seeking opportunities for improvements. • Identifying and addressing Tech Debt. • Influencing and delivering the product roadmap to improve ...

services millions of people love. And we do it all right here at Sky. What you'll do Design and implement scalable APIs and backend services, primarily in Scala, to integrate ML models into production systems and deliver personalised experiences. Real time data processing and gRPC microservices (Typelevel stack … cloud technology - even if you haven't worked extensively in ML before. Demonstrated experience designing, implementing, deploying, and maintaining production-grade APIs and backend services, including responsibility for reliability, performance, and on-call support. Hands-on experience working with data processing frameworks and distributed systems used to ingest, process ...

scientists and chemists. All positions at CheMastery come with an extraordinary level of freedom to showcase your skill . Description The position as a Backend Python Developer is a permanent full-time position. As a Python Developer you will have be part of a brilliant software ...

Python Developer | Python & FastAPI | Founding Engineer in High-Growth AI Venture Studio Contract | £400/day | Outside IR35 The Role You’ll step in as a Founding Engineer within an early-stage AI venture studio that builds and launches creator-led B2C software businesses at speed. This … backend-leaning role (circa 80% backend) where you will own core systems end to end, shaping APIs, designing data models, and shipping production code used by real users from day one. You won’t be handed Jira tickets and told what to build. Instead, you’ll work directly ...

Senior Backend Engineer – Product Team - £100 000 plus equity You'd thrive on building distributed systems that matter. Not the kind that serve AI cat photos and videos, we're talking about the kind that protect countries from escalating cyber warfare. You're about to optimise for national security … cybersecurity, building distributed systems that NATO countries depend on to defend against malicious threats. What You'll Build You'll design the core backend services powering large-scale binary analysis systems that process 200,000 binaries daily — and then scale that to millions and beyond. UK and US defence ...

Level Backend Engineer - Remote (2 days per month)/London - Up to £60,000 p/y ⚡ We're currently looking for a mid-level Backend Engineer to join our client, a tech-enabled security services company protecting some of the UK's most iconic properties (Harrods, luxury ...