Client Server

NewBe an early applicant HybridUK

17 hours ago

Remote Backend Engineer (Go/Node) - Real-Time Pub/Sub, Equity

AI Distributed Systems Node.js

Backend engineer building and optimizing a real-time pub/sub messaging platform using Go and Node.js — designing scalable distributed systems, tuning performance, and owning critical components in an AI-driven environment. Remote with occasional meetups at the North London office; equity included.

NewBe an early applicant UK

17 hours ago

Backend Developer Golang Node Pub / Sub

AI Cloud Distributed Systems Event Driven Architecture Kafka +4 skills

Backend engineer working on the core of a real-time messaging platform, building scalable distributed systems for low-latency Pub/Sub messaging, state sync and AI communication infrastructure in Go or Node.js. Mostly remote with monthly meetups at a North London office; salary up to £120k plus equity.

up to 120K £

NewBe an early applicant UKLead

2 days ago

Lead Backend Engineer - Technologist

API AWS Azure CI/CD Cloud +16 skills

Lead Backend Engineer at a scaling FinTech consultancy in central Newcastle (onsite, Mon-Fri): designing APIs and microservices, overseeing secure server environments, gathering client requirements, and mentoring the team. Broad tech stack including Python, TypeScript, C#/.NET, REST APIs, PostgreSQL, CI/CD and AWS/Azure/GCP; salary to £130k plus bonus.

up to 130K £

4 days ago

Backend Software Engineer TypeScript

New UK

AI Cybersecurity TypeScript

Backend Software Engineer / Developer (TypeScript) Cambridge / WFH to £70k Are you a backend focussed TypeScript Engineer? You could be progressing your career at one of the world's leading cyber security technology…

5 days ago

Senior Backend Engineer - C++/Windows (Finance) – 12m FTC

New UKContractSenior

12-month fixed-term contract in London building real-time, low-latency backend systems for finance/exchange connectivity, handling large data feeds over TCP/IP on Windows. Core stack is C/C++ with some C#, working in an Agile team across the full software development lifecycle.

Agile C++ C# TCP/IP

6 days ago

Senior Backend Engineer - C#/.NET (Sports Trading, London)

New On-siteUKSenior

Senior, hands-on backend engineer building and improving systems in C#/.NET (ASP.NET) for a global sports trading business, based onsite in Shoreditch, London. Strong SQL/Oracle database knowledge and solid computer science fundamentals are expected.

C# .NET Oracle SQL

6 days ago

C# .NET Backend Engineer — Sports Trading (London)

New UKFull-time

Build and maintain C#/.NET backend services for a sports trading company in London, writing robust, scalable code and working with SQL or Oracle databases. Full-time onsite in the City/Shoreditch office, collaborating closely with stakeholders.

C# .NET Oracle SQL

Lead C# & .NET Core Backend Engineer (Hands-on Leader)

New UKLead

API C++ C# .NET Java +2 skills

A hands-on lead backend engineer role in Newcastle upon Tyne: you own C#/.NET Core backend systems, architect APIs and microservices, and mentor a growing team while guiding technical decisions and roadmaps. Onsite position with competitive package and bonus potential.

Backend Software Engineer C++ Windows - Finance

Backend Software Engineer / Developer (Windows C / C++, C#) London to £80k FTC Are you a skilled Backend Software Engineer with strong C++ skills? You could be progressing your career in a senior, hands-on role at a…

Agile C++ C#

Senior C#/.NET Backend Engineer – SQL, London Onsite

UKFull-timeSenior

Senior backend C#/.NET engineer at Client Server Limited, building backend services full-time onsite in the company's London City office. Day-to-day work centers on C#/.NET services with strong SQL/Oracle database work, solid CS fundamentals, and stakeholder communication.

C# .NET Oracle SQL

Real-Time Backend Engineer (C#/.NET) – Trading, London Onsite

On-siteUK

API C# .NET JavaScript React

Design and build real-time trading systems for Client Server Limited in London, focusing on C#/.NET backend and API development with occasional JavaScript/React frontend work. An onsite role collaborating with the strategy team on greenfield projects you own end-to-end, paying up to £90k plus bonus.

up to 90K £

Backend Engineer (C#/.Net Core) – Growth, Perks & Newcastle

C# Distributed Systems .NET Fintech

Builds robust backend services in distributed systems handling large data volumes using C#/.NET Core, contributing across the full software development lifecycle. Onsite role in Newcastle upon Tyne within a FinTech environment, Monday-Friday 09:00-18:00, with salary to £130k plus discretionary bonus.

up to 130K £

Backend Software Engineer C++ Python - Trading

A backend software engineer at a technology-driven systematic trading firm, developing sophisticated, data-driven software that powers systematic trading strategies. The role centers on C++ and Python, requires a solid understanding of the trade lifecycle, and pays up to £125,000 with some work-from-home.

Backend Software Engineer C++ Python - Trading

Backend Software Engineer at a technology-driven systematic trading firm, developing data-driven backend software in C++ and Python to power systematic trading strategies. Based in London with work-from-home option, salary up to £125,000.

Backend Software Engineer C++ Python - Trading

Backend Software Engineer at a technology-driven systematic trading firm in London, designing, building and optimising proprietary C++ and Python software components that power data-driven systematic trading strategies. Pays up to £125,000 with some work-from-home flexibility.

C++ Python

up to 125K £

Senior Python Backend Engineer - AI Security (Hybrid UK)

HybridUKSenior

C++ Python Rust TypeScript

Senior Python backend engineer joining an R&D team in London to build a greenfield project in AI security, working hybrid with two office days per week. The role is primarily Python backend, with occasional work in Rust, TypeScript, or C++.

75K – 85K £

Senior Java Backend Engineer — AI Claude, Real-Time FinTech

UKSenior

Senior Java backend engineer, onsite in Newcastle upon Tyne, to modernise a trading system for a scaling FinTech: designing robust, high-performance, low-latency Java solutions with Front Office teams, using AI tools like Claude. Salary up to £120k.

AI Fintech Java

up to 120K £

Lead Backend Engineer: Architect APIs & Microservices

UKLead

API C# .NET Microservices Python +2 skills

Lead Backend Engineer at Client Server Limited in Newcastle upon Tyne, designing and implementing APIs and microservices, managing secure server environments, and providing architectural leadership while liaising with clients. Core stack: C#, .NET, Python, TypeScript, and REST APIs in a consultancy setting.

Senior C# .NET Backend Engineer – Fintech (Newcastle)

UKSenior

C# Distributed Systems .NET Fintech

A senior backend engineer role designing and building C#/.NET services for fintech platforms, with a focus on high-performance, reliable distributed systems. The engineer owns technical initiatives, influences system design, and works across the full lifecycle from architecture to production delivery, based in Newcastle.