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Client Server Limited

Jobs Hiring Closed Discussion

309 jobs

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309 jobs Posted Sort

Client Server Limited

Quantitative Developer Python C++ - MFT

Open 25d RemoteUK

A quantitative developer at a global trading firm in London joins a new team building a greenfield mid-frequency trading (MFT) platform for equities, designing and implementing trade execution algorithms (TWAP/VWAP) in Python and C++. Hybrid role (3 days in the London office) with base salary up to £175k plus discretionary bonuses.

C++ Java NumPy pandas Python +1 skills

Senior Python Developer FastAPI Azure

Open 26d HybridUKSenior

Senior hands-on backend Python engineer at a fast-growing insurance underwriting SaaS provider, hybrid based in London (3 days/week in office). Day to day: design and build FastAPI services on Azure, work with data at scale, and provide technical leadership — code reviews, mentoring, and driving CI/CD and quality practices.

AWS Azure CI/CD Cybersecurity Design Patterns +4 skills

Client Server Limited

Senior C# / .NET Core Backend Engineer – FinTech (Newcastle)

Open 26d UKSenior

Senior C# / .NET Core backend engineer at Client Server Limited, working on-site in Newcastle upon Tyne to build complex FinTech-grade systems. You own technical projects and contribute across the full development lifecycle, with a salary of up to £110k+ plus bonus, healthcare, and pension.

C# .NET Fintech

Lead Python Backend Engineer (APIs, FastAPI) – Hybrid

Open 26d UKLead

Lead a small London tech team building and refactoring a core banking platform, splitting time 50/50 between architecture/design and people management. Day-to-day work spans API development with Python/FastAPI, GCP cloud services, and CI/CD in a hybrid fintech setting.

API CI/CD Cloud FastAPI Fintech +1 skills

Senior C# Full-Stack Engineer | Payments Platform, Remote

Open 27d HybridUKSenior

Senior full-stack engineer owning features end-to-end for a payments platform in a regulated financial environment — building scalable C#/.NET backend services and Vue.js frontend components, with input on architecture and technical decisions. Hybrid role based in Bracknell (mostly WFH, two office days per week), paying up to £85k.

Senior Python Backend Engineer - AI Cybersecurity R&D

Open 28d UKSenior

Client Server is seeking a Senior Python Developer in Cambridge to join a Greenfield platform addressing AI-driven cyber threats. You will design and build high-performance Python backends, with opportunities to work…

AI C++ Prototyping Python Rust +1 skills

Hybrid Backend Engineer (TypeScript) - Cybersecurity

Open 28d RemoteUK

Client Server is seeking a Backend Software Engineer / Developer (TypeScript) in Cambridge with work-from-home flexibility up to £70k. The role focuses on backend TypeScript services for the customer portal, within a…

Cybersecurity TypeScript

Senior Python Developer Cyber Security

Open 28d UKSenior

Senior Python Developer / Software Engineer Cambridge to £80k Are you a senior backend focussed Python Developer looking to work on technology at the forefront of AI and cyber security? You could be progressing your…

AI AWS Azure C++ Cybersecurity +4 skills

Azure DevOps Engineer - Platform & AI Tooling Madrid Onsite

Open 28d Europe

Client Server in Madrid is seeking a DevOps Engineer to design and deliver scalable internal platforms that empower developers and business users with self-service tooling and cloud-native infrastructure. You will…

AI CI/CD Cloud Cloud Native DevOps

DevOps Engineer Azure - FinTech

Open 29d EuropeFull-time

DevOps Engineer (Azure) Madrid onsite to €120,000 Are you a DevOps Engineer who enjoys building developer platforms that enable engineering teams to move faster while maintaining security, governance and reliability?…

Agentic AI AI Azure CI/CD Cloud +8 skills

Senior C# Backend Engineer • .NET Core (Onsite, Newcastle)

Open 30d UKSenior

Senior C# developer leading backend work on the company's core platform using .NET Core, owning technical projects and delivering high-quality code across the full SDLC with a small onsite team in Newcastle. Onsite hours 09:00-18:00, salary up to £110k plus bonus.

Backend Engineer - Go/Node, Distributed Systems + Equity

A backend engineer builds scalable, low-latency distributed systems in Go and Node.js for a real-time messaging platform used by developers and businesses worldwide. The role offers hybrid/remote working with North London office meetups, plus equity.

AI Distributed Systems Node.js

Senior Data Engineer Python AWS

Open 30d UKFull-timeSenior

Consultant at Client Server - Data and QA Senior Data Engineer (Python AWS SQL DBT) Cheshire to £90k Are you a data technologist looking for an opportunity to progress your career in a hands-on, impactful role with…

Analytics AWS Aws Glue Cloud Cybersecurity +10 skills

Cybersecurity Backend Engineer (TypeScript) – WFH Cambridge

Client Server is seeking a Backend Software Engineer / Developer (TypeScript) to join their team in Cambridge, offering a competitive salary of up to £70k plus bonuses. You will develop backend services for a customer…

Senior Backend Engineer (C# / Python) with AI - Hybrid

Open 33d HybridUKSenior

Client Server in London is seeking a backend software engineer with strong C# and/or Python to join a small, agile team building cloud-native systems for an insurance product portfolio used across international…

Agile AI Cloud Cloud Native C# +1 skills

Frontend Engineer (TypeScript/React) — Up to £120k + Bonus

A frontend engineer at Client Server in Newcastle upon Tyne leads development of data-rich interfaces and dashboards using TypeScript and React, working with trading systems technology in a fast-growing startup with a flexible, collaborative environment.

React TypeScript

Data Engineer Quant Finance

Open 39d HybridUK

Data engineer at a scaling London-based investment research tech company: build and maintain data pipelines, work with large financial datasets, and develop data models and tooling for Quant and Data Science teams using Python and SQL. Hybrid role (3 days/week in office) with a path toward more quantitative and data science work over time.

Data Engineering Data Modeling Data Pipelines Data Quality Data Science +2 skills

Hybrid Data Engineer – Quant Finance, London

Open 39d HybridUK

A hybrid (3 days in office, 2 WFH) Data Engineer/Analyst role in London building data pipelines, modeling data, and contributing to scalable data products in a market data environment, using Python and SQL, with growth toward data science tasks.

Data Pipelines Data Science Python SQL

Front End Developer (TypeScript, React) - FinTech

Front End Developer at a start-up investment management firm in Central Newcastle, building data-rich user interfaces and client dashboards for cutting-edge trading systems. Core stack is TypeScript, React and JavaScript, working in a small, collaborative team.

Design Patterns JavaScript OOP React TypeScript

100K – 120K £

Python Developer - Problem Solver

A backend Python developer role in Cambridge (up to £65k) at an AI-driven cybersecurity company, working on complex systems that protect clients worldwide from advanced cyber threats. Day to day involves Python/backend engineering and heavy problem solving.

AI Cybersecurity Python