Client Server

Senior Full Stack Developer TypeScript React API

Open 21d On-siteUKSenior

AI API React Rust TypeScript

Overview As a Senior Full Stack Engineer in our new UK operation, you will own the architecture and build products from the ground up in a fast-growing sports tech environment. You’ll work hands-on across the stack,…

Senior DevOps Engineer C# Azure - FinTech

Open 22d UKSenior

Automation AWS Azure C# DevOps +5 skills

Overview Senior DevOps Engineer in a tech-startup backed by an investment-management firm. You will establish and lead the DevOps function, automate infrastructure and CI, and enhance monitoring to improve reliability.…

AI Analytics BigQuery CI/CD Data Engineering +4 skills

Senior Data Engineer - GCP, BigQuery & DBT | Hybrid

Open 22d EuropeSenior

Poland

Senior data engineer owning the GCP data platform (BigQuery, dbt) for analytics, compliance and AI at a regulated financial services firm in Kraków. Day to day: build batch and real-time ingestion/transformation pipelines, ensure data quality, and contribute to CI/CD and data governance within a squad.

Open 22d RemoteEuropeSenior

Senior Data Engineer GCP BigQuery DBT

Poland

Hands-on senior data engineer role in Kraków at a global fintech/CFD trading company: design, build and operate batch and real-time data pipelines on GCP using BigQuery, Kafka, Airflow and DBT as part of a Medallion architecture move, own data quality, observability and integrations, and support AI/data science initiatives. Office-based with 2 days a week work from home.

AI Airflow Analytics BigQuery CI/CD +15 skills

up to 27K PLN / mo

Client Server Ltd.

Senior C# Backend Engineer: API, Microservices, WFH

Open 25d UKSenior

AI API AWS Cloud C# +4 skills

Client Server Ltd. in Bracknell, Berkshire seeks a senior backend C# Developer to lead the rebuild of a payments platform. You’ll own backend services, build robust APIs with C# .Net Core, and influence architecture…

Likely evergreen UKFull-timeSenior

Senior Full Stack Developer TypeScript React API

AI API React Rust TypeScript

Senior Full Stack Developer TypeScript React API London, Greater London | £100k - £120k per year Senior Full Stack Engineer / Developer (TypeScript React API Rust) London onsite to £120k Opportunity for a Senior /…

Senior Python Developer FastAPI Azure

Open 26d HybridUKSenior

AWS Azure CI/CD Cybersecurity Design Patterns +4 skills

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.

up to 110K £

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.

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

AI C++ Prototyping Python Rust +1 skills

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…

Senior Python Developer Cyber Security

Open 28d UKSenior

AI AWS Azure C++ Cybersecurity +4 skills

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…

last month

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.

Open 30d UKFull-timeSenior

Senior Data Engineer Python AWS

Analytics AWS Aws Glue Cloud Cybersecurity +10 skills

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…

last month

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

Open 33d HybridUKSenior

Agile AI Cloud Cloud Native C# +1 skills

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…

Remote Senior Full Stack Engineer — React/TypeScript/Node.js

Open 69d RemoteUKSenior

A leading technology firm in the UK is seeking a Senior Full Stack Engineer skilled in React and TypeScript. This role is remote with occasional team meetups in London. Responsibilities include contributing to…

Fintech React TypeScript

Open 69d RemoteUKFull-timeSenior

Senior Full Stack Engineer React TypeScript

AI E-commerce Fintech Microservices Node.js +3 skills

Senior Full Stack Engineer React TypeScript Get AI-powered advice on this job and more exclusive features. This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk…

Senior Full-Stack Engineer: C#/.NET & React, Hybrid

Open 69d HybridUKSenior

Agile Azure C# .NET React +2 skills

A global tech company is seeking a Full Stack Software Engineer with strong C# .Net and React skills, offering a hybrid working arrangement in Cambridge. You will design and develop data-centric software, working…

C# .NET Core Full-Stack Engineer | AWS & Microservices

Open 69d UKSenior

Agile AWS C# .NET Microservices

Senior C# .NET Core engineer building and maintaining payment and client systems in a microservices architecture on AWS.

up to 100K £

Senior Full Stack Engineer - Technologist

Open 69d HybridUKSenior

AWS C++ C# Docker Elixir +5 skills

Senior Full Stack Engineer building scalable energy-trading market-data systems using TypeScript, Elixir, Elm, and AWS in a hybrid London office role.

up to 100K £