/

Point your AI agent at freehire and let it find you a job. A CLI and an MCP server over the whole job API — no browser.

Get the CLI →

Client Server

Jobs Hiring Closed Discussion

88 jobs

Posted Sort

88 jobs Posted Sort

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

Front Office C++ Backend Engineer - London Hybrid to £125k

Senior C++ backend engineer building a core equity trading system for front-office desks in London. Day-to-day is C++17/20 on Linux tackling low-latency, high-volume data challenges alongside traders. Hybrid role (one day a week from home), paying up to £125k plus bonus.

C++ Design Patterns Linux

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

Senior Java Developer – Spring Boot TDD

Salary: £40,000 - 70,000 per year Requirements: Strong backend software engineering skills and experience Strong Java and Spring Boot development experience Technical or team leadership experience, including mentoring…

Agentic AI AI AWS Cloud Design Patterns +9 skills

Senior Software Engineer Python AWS - Front Office

Overview In this role you will design and build high-performance trading systems and cloud infrastructure to support front, middle and back-office operations. You will collaborate with stakeholders to translate complex…

Automation AWS CI/CD Cloud Containerization +2 skills

Senior Java Developer Spring Boot TDD

Senior Java Developer / Backend Engineer (Spring Boot TDD) Manchester / WFH to £78k Are you a Senior Java Developer with hands-on leadership skills? You could be progressing your career at a global games software…

Java Spring TDD

Client Server Limited

Senior Java Backend Engineer — AI-Assisted RealTime Trading

Senior Java backend engineer modernising a high-performance real-time trading system onsite in Newcastle upon Tyne. Day to day: hands-on backend Java development, architectural input on latency-sensitive design, and collaboration with Front Office and engineering teams, using AI tools like Claude to speed up delivery.

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

Senior Systems Engineer SRE Golang - FinTech

Senior Systems Engineer (SRE Golang) to £130k Are you an experienced Systems Engineer with a strong knowledge of modern software infrastructure and robust APIs? You could be progressing your career in a hands-on Senior…

API Fintech Go SRE

Senior Java Developer Spring Boot TDD

A Senior Java Developer / Backend Engineer at a global games software house, guiding a small, high-performing team building real-time sports betting applications. The role blends hands-on Java, Spring Boot and TDD development with team leadership, based in Manchester with WFH options, up to £78k.

Java Spring TDD

Senior Python Developer / Consultant SaaS

Hands-on senior Python consultant building cloud-based SaaS for law firms at a profitable scale-up, leading bespoke client projects end-to-end from design to deployment on AWS using Python, FastAPI and CDK. Hybrid role based in Manchester (3 days on-site), salary up to £80k.

AWS CDK Cloud DevOps FastAPI +2 skills

Senior QA Test Engineer

Senior QA Test Engineer (Manual / Automation Playwright Web Mobile) Bracknell to £70k Opportunity for a skilled QA Test Engineer to join a major rebuild of a leading international payments platform, working within the…

Automation Playwright Test Automation

Senior Java Developer Spring Boot TDD

Open 16d UKSenior

A senior hands-on lead building real-time sports betting backend services with Java and Spring Boot, guiding a small team (~80/20 coding vs leadership), championing TDD and CS fundamentals, and driving delivery with Product Owners.

Agentic AI AI Design Patterns Java Multithreading +4 skills

Client Server Limited

Senior Data Engineer: Snowflake Platform & ELT (Hybrid)

Open 17d HybridUKSenior

Client Server Limited is hiring a Senior Data Engineer in London (hybrid, 3 days in office) to build and optimise ELT data pipelines using Python, SQL, Dagster, dbt and Snowflake, support a Snowflake-based platform including legacy migrations, and champion data-quality best practices with stakeholders.

Dagster Data Pipelines Data Quality dbt Python +2 skills

Client Server Limited

Senior Backend Engineer: Python, ML & AWS (Remote UK)

Open 17d RemoteUKSenior

Senior Backend Engineer building Python backend services to help produce and deploy machine learning models into production on AWS, working day to day with data scientists and ML engineers across the full ML lifecycle. Fully remote within England/UK, up to £90k, with flexible hours and mentoring opportunities.

AWS Machine Learning Python

Client Server Limited

Senior Data Engineer SQL Snowflake - Finance

Open 18d HybridUKSenior

Senior hands-on Data Engineer at a global asset manager in London, building and optimising data pipelines and shaping a new Snowflake-based data platform using Python, SQL, Dagster, dbt and C#, while modernising legacy systems and mentoring junior engineers.

Agentic AI AI C# Dagster Data Engineering +8 skills

Client Server Limited

C++ Backend Engineer - Low-Latency Trading Systems

Open 19d UKSenior

HireHi is seeking a senior C++ backend engineer to redevelop a core equity trading system for the EMEA market. You will design, build, and optimise large data‑intensive backends running on Linux, collaborating directly…

Senior Data Engineer SQL Snowflake - Finance

Open 20d 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

Senior Python Developer FastAPI Azure

Open 21d UKSenior

Overview As a Senior Python Developer you combine hands-on coding with technical leadership to design and deliver a scalable SaaS calculation platform for cyber security insurance. You will shape architecture, set…

AWS Azure CI/CD Cybersecurity Design Patterns +4 skills