Client Server Limited

last week

C# Developer SQL ASP.Net - Tech Start-up

C# Developer joining a five-person London start-up building an online platform that connects customers with certified tradespeople. Day-to-day software engineering with C#, ASP.Net and SQL, working closely with an experienced CTO, onsite in Central London with a salary up to £50k.

Senior Java Developer Spring Boot TDD

UKSenior

Senior Java Developer / Backend Engineer at a global games software house in Manchester (WFH options), paying up to £78k. Day to day you guide and inspire a small, high-performing team building real-time sports betting applications using Java, Spring Boot and TDD.

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.

C#

up to 100K £

last week

Software Engineer Python Django SQL - FinTech

HybridUKFull-time

Agentic AI AI API Django Fintech +2 skills

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.

up to 80K £

Senior Python Developer (AWS) – Hybrid, Growth Path

HybridUKSenior

AWS CDK Cloud DevOps FastAPI +2 skills

Senior backend developer/consultant building bespoke AWS SaaS solutions for clients in Manchester (hybrid with WFH options). Day to day is hands-on Python/FastAPI development plus cloud infrastructure work with AWS CDK and DevOps practices to deliver end-to-end cloud solutions and influence product direction.

Engineering Manager Big Data

UKFull-timeC-level

Agile AI Azure Big Data Data Engineering +4 skills

2 days ago Be among the first 25 applicants 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…

Software Engineer Python AI - Renewable Energy

Agentic AI AI API Automation CI/CD +4 skills

An in-house engineer at a rapidly scaling UK renewable energy business builds AI and conventional software for teams across development, asset management, trading and investment — taking ambiguous problems from discovery through prototyping to production. Core stack: Python, APIs, data integration, LLMs/retrieval, CI/CD; London office with 2 days WFH.

90K – 120K £

Software Engineer Python AI - Renewable Energy

HybridUK

Agentic AI AI API Automation LLM +2 skills

Design, build and run production Python software that applies AI/LLMs, APIs and data integration to real problems at a fast-scaling renewable energy company — prototyping from PoC to production and owning reliability, monitoring and security. Hybrid role based in London, salary up to £120k.

up to 120K £

Software Engineer Python Django SQL - FinTech

HybridUKFull-time

Agentic AI AI API Django Fintech +3 skills

Builds internal platforms and applications for a scaling FinTech product serving investment management, using Python, Django and SQL. The engineer collaborates with stakeholders to translate requirements into scalable solutions and owns projects end to end in a hybrid London role.

up to 80K £

Java Developer AI Claude - FinTech

AI C++ Fintech Java Multithreading

Hands-on backend Java role at a scaling FinTech in Newcastle, modernising a C++ trading system into a scalable, high-performance real-time Java platform for Front Office traders. Involves architectural ownership and use of AI-assisted tools like Claude; salary up to £120k plus bonus.

up to 120K £

Python Software Engineer Conversational AI

AI AWS Conversational AI Infrastructure as Code LLM +3 skills

A remote, hands-on engineer role designing and building production-grade AI systems and backend services for a conversational AI platform. Day to day you work with Python, LLMs, AWS, TypeScript, Node.js and infrastructure as code, owning technical decisions and evolving the architecture.

Software Engineer Python SQL - Market Data

CI/CD Data Engineering Data Lake Distributed Systems ETL +6 skills

A hands-on Python engineer builds and maintains components of a financial market-data platform: designing ETL pipelines, data lakes/lakehouses and distributed microservices, while improving infrastructure, CI/CD and observability. Core stack is Python and SQL with relational, NoSQL and columnar databases.

up to 150K £

Python Developer / Team Lead - FinTech

HybridUKLead

API AWS Azure CI/CD Cloud +7 skills

Hands-on Team Lead for a core banking platform at a well-funded FinTech in London: split roughly 50/50 between hands-on Python/FastAPI architecture, refactoring and feature delivery, and leading/mentoring a small team. Stack is Python with FastAPI APIs, cloud (GCP preferred), and CI/CD.

Founding Software Engineer Python - Start-Up

Agentic AI AI API Azure CI/CD +10 skills

Founding full-stack engineer at an early-stage AI start-up building compliance and operational-efficiency technology for the NHS and other regulated industries. You own Python/TypeScript development end to end — architecture, FastAPI backend services, React frontend, and Azure CI/CD — working hybrid from London and Cambridge.

up to 115K £

Python Software Engineer Agentic Ai

Agentic AI Agile AI Ai Enablement API +10 skills

A Python engineer builds backend code and APIs focused on agentic AI — developing, integrating and deploying intelligent agents powered by LLMs like Claude and ChatGPT, with prompt engineering, CI/CD and ideally AWS and Neo4j. London-based with work-from-home one day a week, salary up to £65k plus bonus and EMI share options.

up to 65K £

Lead C# Developer .Net - FinTech

HybridUKLead

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.

Senior Software Engineer C# Python AI

RemoteUKSenior

Agile AI Angular AWS Azure +14 skills

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…

Senior Java Developer – Spring Boot TDD

RemoteUKSenior

Agentic AI AI AWS Cloud Design Patterns +9 skills

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…

Python Software Engineer Agentic AI

Agentic AI Agile AI API AWS +9 skills

Overview In this role you will design and deliver backend solutions and AI-enabled workflows that empower intelligent agents. You’ll work with a cross-functional team to implement robust APIs and prompt-driven systems…