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Client Server Limited

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63 jobs

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63 jobs Posted Sort

Client Server Limited

Software Engineer Python Django SQL - FinTech

HybridUKFull-time

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.

Agentic AI AI API Django Fintech +2 skills

Client Server Limited

Senior Python Backend Engineer - AI Security (Hybrid UK)

Senior Python backend engineer joining an R&D team in London to build a greenfield project in AI security, working hybrid with two office days per week. The role is primarily Python backend, with occasional work in Rust, TypeScript, or C++.

C++ Python Rust TypeScript

Client Server Limited

Senior Python Developer (AWS) – Hybrid, Growth Path

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.

AWS CDK Cloud DevOps FastAPI +2 skills

Software Engineer Python AI - Renewable Energy

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.

Agentic AI AI API Automation LLM +2 skills

Client Server Limited

Python Backend Engineer — Cybersecurity R&D (Greenfield)

Client Server Limited is hiring a Python backend engineer to build a greenfield product in its cybersecurity R&D team near Cambridge, UK. Day to day is Python backend development with the chance to explore Rust and emerging technologies, in a hybrid setup with two office days per week in Cambridge.

Software Engineer Python Django SQL - FinTech

HybridUKFull-time

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.

Agentic AI AI API Django Fintech +3 skills

Lead Full Stack Engineer TypeScript Python API

Lead engineer driving data and technology strategy across a private equity portfolio: running data diligence, maturing portfolio companies' data capabilities and delivering data projects that support value creation. Core tech is TypeScript and Python for API development, with cloud (AWS, Azure, GCP) and AI/agentic programming.

Agentic AI AI Analytics API Api Design +7 skills

Python Developer / Team Lead - FinTech

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.

API AWS Azure CI/CD Cloud +7 skills

Client Server Limited

Hybrid C#/.NET Full-Stack Engineer | AWS Microservices

A C#/.NET full-stack engineer builds high-scale .NET Core backend services using AWS microservices and real-time data for sports analytics and trading platforms. This is a hybrid role near St Albans with two days per week working from home.

Analytics Cloud C# .NET

100K – 100K £

Client Server Limited

Senior C# .NET Full-Stack Engineer – Remote

Senior full-stack engineer owning features end-to-end (API, backend, frontend) with C# .NET and Vue.js for an international payments platform, including architecture ownership and collaboration with Product, Design and Compliance. Mostly work-from-home with twice-weekly presence in the Bracknell office (hybrid).

API C# .NET Vue

Client Server Limited

Backend Engineer TypeScript – Remote/WFH Cyber Security

Builds and owns TypeScript backend services for a cybersecurity company's customer portal, taking features from rapid prototype to production-ready systems with a security focus. Hybrid role: two days per week in the Cambridge office, the rest working from home.

Client Server Limited

Python Backend Engineer – AI Security R&D (Cambridge)

A Python backend engineer joins the R&D team in Cambridge to build a new greenfield product that combats AI-based security threats, delivering complex backend systems through rapid prototyping and iterative development, mainly in Python with exposure to Rust and TypeScript, in a hybrid work arrangement.

AI Prototyping Python Rust TypeScript

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

Lead C# Developer .Net - FinTech

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.

C# .NET Fintech

Client Server Limited

Software Engineer Python GenAI LLM - Finance

HybridUKContract

Software Engineer Python GenAI LLM - Finance London, Greater London | £140k - £180k per year Software Engineer / Developer (Python GenAI LLM RAG) London 12 month FTC to £180k Are you a Senior Software Engineer with a…

Agentic AI API Claude Code Data Engineering Developer Experience +7 skills

Python Software Engineer Cyber Security

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…

AI AWS Azure C++ Cybersecurity +4 skills

Founding Software Engineer (Python) - AI for Compliance

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…

AI Azure CI/CD Cloud Cloud Native +2 skills

Client Server Limited

Lead Software Engineer Python Api - Fintech

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…

API AWS Azure CI/CD Cloud +7 skills

Client Server Limited

Lead Full Stack Engineer TypeScript Python API

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.

Agentic AI AI Analytics API AWS +5 skills

100K – 125K £

Client Server Limited

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

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