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Client Server

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305 jobs

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305 jobs Posted Sort

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.

Senior DevOps Engineer

Hands-on Senior DevOps Engineer building, deploying and operating production systems for a global financial services company rebuilding its international payments platform (Corporate Payments division). Core stack includes AWS, VMware and GitHub; based in Bracknell/Warfield with WFH flexibility, salary up to £95k.

AWS DevOps GitHub VMware

Release Engineering Lead Azure DevOps

Lead release engineering at a global InsurTech SaaS business, owning how software is packaged, released and presented to customers. Day-to-day combines DevOps practices with strong release management, using Azure DevOps. Based in Reigate with WFH/flexible working; salary up to £130k.

Azure Azure DevOps DevOps SaaS

Platform Engineer Azure IaC C# .Net

Platform Engineer (Azure IaC C# .Net SaaS) Reigate / WFH to £105k Are you a senior Platform Engineer with a strong knowledge of Azure who enjoys collaborating and getting things done? You could be progressing your…

Azure C# .NET Fintech Infrastructure as Code +1 skills

Release Engineering Lead Azure DevOps

Release Engineering Lead at a global InsurTech business, owning release engineering and release management for complex SaaS systems using Azure DevOps. Requires a DevOps background and strong SaaS release management experience; based in Reigate or WFH with a salary up to £130k and flexible working.

Azure Azure DevOps DevOps SaaS

Full Stack Developer .Net Core AWS React

HybridUKFull-time

Full-stack developer building scalable, secure backend systems in C# .NET Core and working with AWS cloud infrastructure (Docker, Terraform) within an Agile team. Hybrid role based in Sunderland with 2-3 office days per week, paying up to £55k plus quarterly bonus; React featured in the role title.

Agile AWS Cloud C# Docker +3 skills

Software Engineer IAM Python SaaS

A Software Engineer role building identity and access management (IAM) functionality in Python for a European car insurance tech company's SaaS platform, which lets consumers get insurance quotes in ~60 seconds. The stack also involves Rust and infrastructure-as-code; the role pays up to £90k and is based in East London.

IAM Infrastructure as Code Python Rust SaaS

C# Software Engineer - Finance

A senior hands-on C# engineer joins a small team at a global asset manager in Central London (with WFH options) to design and build new features for the client portal and KYC systems, earning up to £100k.

Client Server Limited

Software Engineer Python Django SQL - FinTech

HybridUKFull-time

Python developer at a scaling London FinTech whose core product is a private equities / alternative investment management platform. Day to day you build internal platforms and apps with Python, Django and SQL, work directly with business stakeholders, and own projects end to end. London-based role with salary to £80k plus bonus.

Agentic AI AI API Django Fintech +2 skills

Senior Front End Engineer React - PoS

Senior front-end engineer owning the React front end of a point-of-sale product described as a financial operating system for live events, cutting customer queue times and maximising vendor revenue. Role is based in Central London with some WFH, salary up to £90,000.

Platform Engineer AWS C# or Python - Trading

Platform Engineer joining a technology business that builds platforms for analysing and trading on global sports markets. Day to day you collaborate with a small engineering team to build and operate AWS-based infrastructure, using C# or Python, working hybrid between St Albans and home for up to £115k.

Client Server Limited

Senior Full-Stack Engineer – Remote UK, AI‑Driven Fintech

Staff-level full-stack engineer owning the architecture of a real-time energy trading platform, staying hands-on building scalable systems with TypeScript, Node.js, React and AWS, collaborating across teams and influencing product decisions while using AI-assisted development practices. UK-based role.

AI AWS Node.js React TypeScript

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++ Software Engineer Swift macOS - Cyber Security

A C++ Software Engineer role at a leading cyber security technology company in Cambridge, UK (with work-from-home option), developing next-generation software to protect organisations against AI-driven cyber threats. Core stack is C++ with Swift on macOS; salary up to £80,000.

AI C++ Cybersecurity macOS Swift

Client Server Limited

Senior Python Backend Engineer - AI Security (Hybrid UK)

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++.

C++ Python Rust TypeScript

Client Server Limited

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

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

Client Server Limited

Lead Backend Engineer: Architect APIs & Microservices

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.

API C# .NET Microservices Python +2 skills

Client Server Limited

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

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.

C# Distributed Systems .NET Fintech

Client Server Limited

Backend Software Engineer Python - Technologist

Backend Software Engineer joining the R&D team of a cybersecurity firm that uses AI to defend against AI-based attacks, building a new greenfield product. Mostly backend Python with some Rust/TypeScript/C++ and cloud (AWS/Azure/GCP); hybrid role based in the Cambridge office two days a week. Salary to £80k plus bonus.

AI AWS Azure C++ Cybersecurity +5 skills