Client Server

Founding Software Engineer Python - Start-up

New UK

Founding Software Engineer (Python) to £115k Are you an ambitious full stack Software Engineer who thrives in early-stage environments where you can shape both the technology and the product? You could be joining a…

AI Python

Data Engineer - Finance Data

AWS Data Engineering Data Pipelines Fintech Python +1 skills

Hands-on Data Engineer building data pipelines in Python, SQL and AWS for a scaling investment-research tech company in London (with WFH options), at the intersection of data engineering, database management and platform delivery. Salary up to £85,000.

up to 85K £

Data Engineer - Finance Data

AWS Cloud Data Engineering Data Pipelines Fintech +2 skills

A hands-on Data Engineer building and evolving a modern, scalable AWS cloud data platform at a growing investment-research tech company in London, focused on data pipelines, database management and platform delivery using Python, SQL and AWS. Role is London-based with WFH options, salary up to £85k.

up to 85K £

Backend Software Engineer C++ Python - Trading

A backend software engineer at a technology-driven systematic trading firm, developing sophisticated, data-driven software that powers systematic trading strategies. The role centers on C++ and Python, requires a solid understanding of the trade lifecycle, and pays up to £125,000 with some work-from-home.

Software Engineer IAM Python SaaS

IAM Infrastructure as Code Python Rust SaaS

A Software Engineer role building identity and access management (IAM) functionality in Python for a European car insurance tech company's SaaS platform, which lets consumers get insurance quotes in ~60 seconds. The stack also involves Rust and infrastructure-as-code; the role pays up to £90k and is based in East London.

up to 90K £

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 £

Platform Engineer AWS C# or Python - Trading

Platform Engineer joining a technology business that builds platforms for analysing and trading on global sports markets. Day to day you collaborate with a small engineering team to build and operate AWS-based infrastructure, using C# or Python, working hybrid between St Albans and home for up to £115k.

Backend Software Engineer C++ Python - Trading

Backend Software Engineer at a technology-driven systematic trading firm, developing data-driven backend software in C++ and Python to power systematic trading strategies. Based in London with work-from-home option, salary up to £125,000.

Backend Software Engineer C++ Python - Trading

Backend Software Engineer at a technology-driven systematic trading firm in London, designing, building and optimising proprietary C++ and Python software components that power data-driven systematic trading strategies. Pays up to £125,000 with some work-from-home flexibility.

C++ Python

up to 125K £

Senior Python Backend Engineer - AI Security (Hybrid UK)

HybridUKSenior

C++ Python Rust TypeScript

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++.

75K – 85K £

Lead Backend Engineer: Architect APIs & Microservices

UKLead

API C# .NET Microservices Python +2 skills

Lead Backend Engineer at Client Server Limited in Newcastle upon Tyne, designing and implementing APIs and microservices, managing secure server environments, and providing architectural leadership while liaising with clients. Core stack: C#, .NET, Python, TypeScript, and REST APIs in a consultancy setting.

Backend Software Engineer Python - Technologist

AI AWS Azure C++ Cybersecurity +5 skills

Backend Software Engineer joining the R&D team of a cybersecurity firm that uses AI to defend against AI-based attacks, building a new greenfield product. Mostly backend Python with some Rust/TypeScript/C++ and cloud (AWS/Azure/GCP); hybrid role based in the Cambridge office two days a week. 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.

Backend Software Engineer Python R&D

AI AWS Azure C++ Cybersecurity +5 skills

Backend Python engineer in the R&D team of a Cambridge cybersecurity firm building a greenfield product to combat AI-based security attacks. Day to day is rapid prototyping and platform development, mainly in Python with exposure to Rust and cloud platforms, hybrid from the Cambridge office twice a week.

up to 65K £

Senior Python Backend Engineer - AI Cybersecurity

UKSenior

AI Cloud C++ Cybersecurity Prototyping +3 skills

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.

Remote Python Backend Engineer — AI & LLM Systems

RemoteUK

AI AWS Conversational AI Node.js Python +1 skills

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.

Software Engineer Python AI - Renewable Energy

RemoteUK

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 £

python developer in cybersecurity

AI AWS Azure C++ Cybersecurity +4 skills

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++.

Senior Python Developer - Cyber Security

UKSenior

AI AWS Azure C++ Cybersecurity +5 skills

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.

75K – 85K £