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Client Server Limited

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80 jobs Posted Sort

Client Server Limited

Senior C# Backend Engineer – Real-Time Trading Systems

UKFull-timeSenior

Senior backend engineer joining a London-based trading engine team to design and build real-time trading systems and own Greenfield projects alongside the strategy team. Core stack is C#/.NET with ASP.NET and SQL/Oracle, plus some JavaScript/React; full-time onsite in the City office.

C# .NET JavaScript Oracle React +1 skills

Client Server Limited

Data Engineer Python Sql Spark

Data Engineer at a $17bn+ hedge fund in London (Soho), joining a small team that sources, combines, and transforms third-party market data for traders, quants, and the investment desk. Core stack is Python/C#, SQL, with Apache Spark and Azure Databricks preferred; salary to £160k plus bonus.

Azure C# Databricks Python Spark +2 skills

Client Server Limited

Backend Engineer - C# .NET Core | FinTech (Newcastle)

Backend engineer building high-performance C# .NET Core services and distributed systems that handle large data volumes for a FinTech client, onsite in brand-new Newcastle offices. The role covers the full SDLC with flexible hours and a focus on quality, robust software.

C# Distributed Systems .NET Fintech SDLC

Client Server Limited

Senior C#/.NET API Engineer — Full-Stack, Remote/WFH

Client Server Limited is seeking a senior C# Developer to own features end-to-end across API design, backend services and front-end delivery. You'll work on a global payments platform in the Corporate Payments…

API Api Design AWS C# SQL +1 skills

Client Server Limited

London Backend Engineer (C#/.NET) - Sports Trading, Onsite + Bonus

Backend Engineer (C#/.NET) joining a sports trading team onsite in London, building robust backend systems, APIs and data flows for high-availability trading. Core stack: C#/.NET, ASP.NET, and SQL or Oracle.

API C# .NET Oracle SQL

Client Server Limited

Hybrid C#/.NET Full-Stack Engineer | AWS Microservices

A C#/.NET full-stack engineer builds high-scale .NET Core backend services using AWS microservices and real-time data for sports analytics and trading platforms. This is a hybrid role near St Albans with two days per week working from home.

Analytics Cloud C# .NET

100K – 100K £

Client Server Limited

Senior C# .NET Full-Stack Engineer – Remote

Senior full-stack engineer owning features end-to-end (API, backend, frontend) with C# .NET and Vue.js for an international payments platform, including architecture ownership and collaboration with Product, Design and Compliance. Mostly work-from-home with twice-weekly presence in the Bracknell office (hybrid).

API C# .NET Vue

Client Server Limited

Senior C# .NET API Engineer – Full-Stack, Remote

Senior C# engineer owning features end-to-end: designing scalable .NET APIs and backend services, building Vue.js frontend components, and driving architectural decisions while mentoring others and modernising legacy systems. Remote-friendly, with office presence twice weekly in Bracknell.

API C# .NET Vue

Client Server Limited

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

Backend engineer building high-performance trading systems in C#/.NET with SQL for a hedge fund technology team in London, collaborating with quantitative researchers on valuation and pricing components and owning projects from design through delivery.

Client Server Limited

Backend Engineer (C#/.NET, SQL) – Hedge Fund Systems

Client Server Limited is seeking a Backend Software Engineer in London to design and implement high-performance trading systems using C# and SQL. The role emphasizes ownership from day one, collaboration with quant…

Lead C# Developer .Net - FinTech

Hands-on Lead C# Developer role building and leading development of complex, scalable C#/.NET desktop applications for a global fintech. Based in Reigate, Surrey with hybrid working (3 days a week from home), paying up to £100k plus a ~20% bonus.

C# .NET Fintech

Senior Software Engineer C# Python AI

Salary: £40,000 - 70,000 per year Requirements Strong backend software engineering skills with C# and/or Python Strong knowledge of Computer Science fundamentals, including OOP, multithreading, design patterns, and…

Agile AI Angular AWS Azure +14 skills

Client Server Limited

Senior C#/.NET API Engineer — Full-Stack, Remote/WFH

Senior C#/.NET engineer owning features end-to-end — API design, backend services, and Vue.js front-end delivery — on a global payments platform in the Corporate Payments division. Mostly work-from-home with occasional office days in Bracknell; AWS production experience is a plus.

API Api Design AWS C# SQL +1 skills

C# Software Engineer .Net WPF - Trading

Senior hands-on C# Software Engineer building sophisticated front-office trading UIs with .NET WPF at the investment management arm of a global bank in Central London, supporting real-time, high-performance equities and options trading.

Data Engineer Python SQL Spark

Join a small data team at a London hedge fund, transforming raw third-party market data into usable insights for traders and quants. Day to day you build and improve data pipelines, dictionaries and quality processes using Python (or C#), SQL, Apache Spark and Azure Databricks.

Accessibility Azure C# Data Quality Data Visualization +5 skills

Senior Data Engineer SQL Snowflake - Finance

Open 21d UKSenior

Overview In this Senior Data Engineer role you will design and optimize data pipelines and integrations using Python, SQL, Dagster, Snowflake, DBT and C#, while helping build a Snowflake-based data platform for a…

C# Dagster Data Engineering Data Modeling Data Pipelines +6 skills

Senior Full Stack Engineer C# Vue.js

Open 21d UKSenior

Overview In questa role you will own and deliver features end-to-end across the tech stack for an international payments platform within a global financial services group. You’ll design scalable backend services in C#…

API AWS CI/CD C# Distributed Systems +13 skills

Client Server Limited

Full Stack Engineer: .NET/JS in Sports Tech (Hybrid)

Open 21d HybridUK

Client Server Limited is recruiting a Full Stack Engineer in St Albans (hybrid, two days WFH per week) for a fast-paced sports tech business, paying up to £100k. Day to day you deliver backend and frontend features across a microservices ecosystem using C# .NET Core, JavaScript/TypeScript, Angular, AWS, Kubernetes and Kafka.

Angular AWS C# .NET JavaScript +4 skills

Client Server Limited

Mid-Level Full-Stack Engineer — Hybrid (£110k + Bonuses)

Open 21d HybridUKMiddle

A mid-level full-stack engineer builds Payments and client-facing features for a technology-driven trading company, working in a C# .NET Core microservices stack on AWS. The role is hybrid in St Albans with 2 days of home working per week, plus bonuses and benefits.

AWS C# .NET Microservices

110K – 110K £

Client Server Limited

Full Stack Engineer .Net JavaScript - Sports Betting

Open 21d HybridUK

Full stack engineer building platforms used to analyse and trade on global sports markets: designing features across a microservices ecosystem with C# .NET Core on the backend and JavaScript/TypeScript with Angular on the frontend, using AWS, Kubernetes and Kafka. Office-based in St Albans with 2 days WFH per week; salary up to £100k.

Angular AWS Cloud C# Design Patterns +9 skills