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Client Server

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158 jobs

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158 jobs Posted Sort

Client Server Limited

Senior Python Backend Engineer - AI Cybersecurity

Build a greenfield AI-driven cybersecurity product at Client Server Limited: as Senior Python Backend Engineer you will rapidly prototype ideas, tackle complex problems, and deliver robust backend services using Python and cloud platforms, ideally with some Rust, TypeScript, or C++ exposure.

AI Cloud C++ Cybersecurity Prototyping +3 skills

Client Server Limited

Remote Python Backend Engineer — AI & LLM Systems

Backend engineer building production-grade Python backend services and AI/LLM workflows that power conversational AI, working with AWS, TypeScript, Node.js, and asynchronous Python. Remote-first within the UK with flexible hours and monthly team meetups.

AI AWS Conversational AI Node.js Python +1 skills

Client Server Limited

Software Engineer Python AI - Renewable Energy

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.

Agentic AI AI API Automation CI/CD +4 skills

90K – 120K £

Client Server Limited

python developer in cybersecurity

A Python backend developer in London building a greenfield cybersecurity product that defends against AI-based attacks. Day to day involves rapid prototyping, structured platform development, and solving complex problems using Python, cloud platforms (AWS/Azure/GCP), and some Rust, TypeScript, or C++.

AI AWS Azure C++ Cybersecurity +4 skills

Client Server Limited

Senior Python Developer - Cyber Security

Senior Python Developer joining the R&D team of a cybersecurity technology business in London (hybrid, twice a week in office) to build a new Greenfield product combating AI-based attacks — mostly backend Python work plus Rust and other emerging technologies. Salary £75k–£85k plus bonus and benefits.

AI AWS Azure C++ Cybersecurity +5 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.

Data Engineer Quant Finance

Builds and maintains data pipelines, models, and infrastructure that power Quant and Data Science teams at a financial-markets research company, working with large complex datasets primarily in Python and SQL. The role offers a path toward growing data science/quantitative responsibilities over time.

Data Engineering Data Modeling Data Pipelines Data Quality Data Science +2 skills

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

Senior Python Developer - Cyber Security

Senior Python developer role at a cybersecurity technology company that uses AI to protect clients globally. Day-to-day involves backend engineering on complex systems, based in London or working from home, with a salary of up to £85,000.

AI Cybersecurity Python

Backend Software Engineer Python - Technologist

Backend software engineer joining a Cambridge-based cybersecurity company that uses AI to protect clients worldwide from advanced cyber threats. The role focuses on backend development in Python, with Rust and C++ also central to the stack; salary up to £80k.

AI C++ Cybersecurity Python Rust

Client Server Limited

Python Software Engineer Machine Learning Aws

Senior hands-on Python engineer at a European car insurance tech company, joining a cross-functional team to implement machine learning algorithms into production underwriting and pricing systems. Core stack is Python, AWS and ML tooling (Databricks, PostgreSQL, Redshift, MLflow); fully remote within England, salary up to £90k.

Agile AWS Databricks Design Patterns Machine Learning +6 skills

Python Software Engineer Conversational AI

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.

AI AWS Conversational AI Infrastructure as Code LLM +3 skills

Software Engineer Python SQL - Market Data

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.

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

Client Server Limited

Python Developer – Data Platform & ETL (London)

A Python developer at a London hedge fund builds and optimises a data platform, working on ETL pipelines, microservices, and databases with a focus on data quality and reliability. The role involves CI/CD workflows, code reviews, and supporting logs, monitoring, and observability.

CI/CD Data Quality ETL Microservices Observability +1 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

Senior Python Developer - Cyber Security

A Senior Python Developer / Backend Software Engineer builds backend systems at a cybersecurity company in London that uses AI to defend clients worldwide from advanced cyber threats. Day to day: Python backend development on complex systems, with hybrid/WFH options and a salary up to £85,000.

AI Cybersecurity Python

Founding Software Engineer Python - Start-Up

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.

Agentic AI AI API Azure CI/CD +10 skills

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