Client Server Limited

Python Software Engineer Agentic AI

UK

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…

Python Software Engineer Cyber Security

HybridUK

AI AWS Azure C++ Cybersecurity +4 skills

Overview In this Python Software Engineer role, you will help build a Greenfield AI cybersecurity product within the R&D team. You’ll mainly develop backend services in Python while evaluating Rust and other…

Python Software Engineer Cyber Security

UK

Python Software Engineer / Developer London / WFH to GBP80k Do you have strong backend Python software development experience? You could be progressing your career at the world's most advanced cybersecurity…

AI Cybersecurity Python

Python Software Engineer Conversational AI

RemoteUKFull-time

Agentic AI AI AWS Conversational AI Infrastructure as Code +4 skills

Python Software Engineer Conversational AI London, Greater London | £80k - £90k per year Python Software Engineer / Developer (Conversational AI) Remote UK to £90k Are you a backend focussed Python Software Engineer…

Founding Software Engineer Python - Start-up

UK

Agentic AI AI API Azure CI/CD +10 skills

Overview In this Founding Software Engineer role you will shape both technology and product in a fast-growing AI startup. You’ll own the design and development of cloud-native applications, spanning backend, frontend,…

Lead Software Engineer Python API

UKLead

Azure CI/CD Cybersecurity Databricks Design Patterns +7 skills

Overview In this Lead Software Engineer role, you’ll stay hands-on while guiding a technical team to build a complex SaaS calculation platform for cyber security insurance. You’ll shape architecture, define…

Lead Software Engineer Python API - Fintech

UKLead

API Api Design AWS Azure CI/CD +8 skills

Overview As Lead Software Engineer you will steer a small tech team to deliver features, perform refactoring, and contribute to a core banking platform. You will balance architecture work with people management to…

Founding Software Engineer (Python) - AI for Compliance

HybridUK

AI Azure CI/CD Cloud Cloud Native +2 skills

Client Server is seeking a Founding Software Engineer (Python) in the UK to help shape core technology and product in a fast-growing AI startup. You will own the design and build of cloud-native applications, spanning…

Backend Software Engineer Python ML AWS

RemoteUK

Agile AWS Databricks Design Patterns Machine Learning +6 skills

Backend Software Engineer / Developer (Python Machine Learning AWS) Remote UK to £90k Are you a data savvy Backend Software Engineer with experience of implementing ML algorithms into production? You could be…

Backend Software Engineer Python LLM

RemoteUKFull-time

Agentic AI AI AWS Conversational AI Infrastructure as Code +4 skills

Backend Software Engineer / Developer (Python LLM) Remote UK to £90k Are you a backend focussed Software Engineer looking for an opportunity to progress your career, whilst working remotely on a modern tech stack? You…

Software Engineer Python SQL - Market Data

UKFull-time

CI/CD Data Engineering Data Lake Distributed Systems ETL +7 skills

Software Engineer Python SQL - Market Data London, Greater London | £130k - £150k per year Software Engineer / Developer (Python SQL) London to £150k+ Are you a data savvy Software Engineer with strong Python coding…

Lead Software Engineer Python Api - Fintech

HybridUKLead

API AWS Azure CI/CD Cloud +7 skills

Lead Software Engineer / Developer London / WFH to £120k Are you a skilled a backend focussed Python technologist with team leadership experience? You could be progressing your career at a well-funded and profitable…

Senior Software Engineer Python AWS - Front Office

UKSenior

Automation AWS CI/CD Cloud Containerization +2 skills

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…

Backend Software Engineer Python LLM

RemoteUK

AI AWS Cloud Conversational AI Infrastructure as Code +4 skills

Overview In this remote-first Backend Software Engineer role, you will build and maintain production-grade AI systems and the supporting infrastructure. You’ll own technical decisions, contribute to the evolution of a…

Lead Full Stack Engineer TypeScript Python API

HybridUKLead

Agentic AI AI Analytics API AWS +5 skills

Lead Full Stack Engineer at a profitable London private equity firm, working at the intersection of tech, data, strategy and investment — leading data diligence and shaping tech/data strategy for portfolio companies. Day to day spans TypeScript and Python development, cloud data platforms (AWS/Azure/GCP) and agentic AI, hybrid with three days a week in the London office.

100K – 125K £

Lead Full Stack Engineer (TypeScript + Python) – Hybrid London

HybridUKLead

Lead a full stack engineering effort in London, blending hands-on TypeScript and Python API development with strategic leadership of data transformation across a private equity portfolio. Hybrid role with London office presence.

API Python TypeScript

Senior Java Backend Engineer — AI-Assisted RealTime Trading

UKSenior

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.

AI Java

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

RemoteUKSenior

API Api Design AWS C# SQL +1 skills

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.

Java Developer AI Claude - FinTech

UKFull-time

Senior hands-on Java backend developer at a scaling FinTech in Central Newcastle, modernising a C++ trading system into a scalable, low-latency Java application while using AI tools like Claude. Full-time onsite Monday to Friday, collaborating closely with Front Office trading teams.

AI C++ Fintech Java

100K – 120K £