Client Server

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…

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…

Senior Java Developer Spring Boot TDD

UKSenior

Senior Java Developer / Backend Engineer (Spring Boot TDD) Manchester / WFH to £78k Are you a Senior Java Developer with hands-on leadership skills? You could be progressing your career at a global games software…

Java Spring TDD

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 £

Python Developer / Team Lead - FinTech

HybridUKLead

API AWS Azure CI/CD Cloud +7 skills

A hands-on Python Developer / Team Lead at a profitable FinTech start-up, leading a small team building features for a core banking platform that integrates with major banks like HSBC. Roughly a 50/50 split between architecture/design and people management, using Python, FastAPI and GCP in a hybrid London role.

100K – 120K £

Lead Python Developer & Team Lead — Hybrid (London)

HybridUKLead

Lead a small London tech team as a hands-on Python Developer & Team Lead, splitting time 50/50 between architecture/design and people management while delivering features and refactoring a core banking platform. Core stack: Python, APIs, cloud services, CI/CD; hybrid model with office days in London and up to two remote days per week.

API CI/CD Cloud Python

Software Engineer Python AI - Renewable Energy

UK

Software engineer role building Python-based AI solutions for business systems at a rapidly scaling UK renewable energy company with a growing portfolio of wind and solar assets, taking solutions from build into production. London-based with WFH flexibility, paying up to £120k.

Senior Java Developer Spring Boot TDD

UKSenior

A Senior Java Developer / Backend Engineer at a global games software house, guiding a small, high-performing team building real-time sports betting applications. The role blends hands-on Java, Spring Boot and TDD development with team leadership, based in Manchester with WFH options, up to £78k.

C# Software Engineer .Net WPF - Trading

UK

Senior hands-on C# Software Engineer building sophisticated front-office trading UIs with .NET WPF at the investment management arm of a global bank in Central London, supporting real-time, high-performance equities and options trading.

Senior Python Developer / Consultant SaaS

HybridUKSenior

AWS CDK Cloud DevOps FastAPI +2 skills

Hands-on senior Python consultant building cloud-based SaaS for law firms at a profitable scale-up, leading bespoke client projects end-to-end from design to deployment on AWS using Python, FastAPI and CDK. Hybrid role based in Manchester (3 days on-site), salary up to £80k.

up to 80K £

Python Software Engineer Conversational AI

Open 16d UK

AI Conversational AI Python

A remote (UK-based) senior, hands-on Python engineer role at a scaling AI software solutions provider. The person builds production-grade conversational AI systems and their supporting infrastructure using a backend-focused Python stack, earning up to £90,000.

up to 90K £

Senior Java Developer Spring Boot TDD

Open 16d UKSenior

Agentic AI AI Design Patterns Java Multithreading +4 skills

A senior hands-on lead building real-time sports betting backend services with Java and Spring Boot, guiding a small team (~80/20 coding vs leadership), championing TDD and CS fundamentals, and driving delivery with Product Owners.

up to 78K £

Python Developer

Open 17d UK

AI AWS Azure Cloud C++ +6 skills

A Python backend developer joins an R&D team building a new greenfield product that uses AI to defend against AI-based cyberattacks. Day-to-day involves building complex Python backend systems, rapid prototyping, and working with Rust, TypeScript/C++ and cloud platforms (AWS/Azure/GCP) in a hybrid role based in Cambridge.

65K – 65K £

Senior Python Developer FastAPI Azure

Open 21d UKSenior

AWS Azure CI/CD Cybersecurity Design Patterns +4 skills

Overview As a Senior Python Developer you combine hands-on coding with technical leadership to design and deliver a scalable SaaS calculation platform for cyber security insurance. You will shape architecture, set…

Python Developer SQL - Market Data

Open 21d UK

CI/CD Data Quality Distributed Systems ETL Infrastructure as Code +7 skills

Overview As a Python Dev you will build and optimize a data platform for high-quality, reliable data delivery in a financial setting. You’ll shape implementations across the full lifecycle and work with…

Web Developer JavaScript Angular - HealthTech

Open 21d UK

Agile Android Angular API AWS +8 skills

Overview In this role you will shape the frontend of a real-time shift rota platform, leveraging Angular 21 to modernise the web experience. You will work closely with a small team to influence best practices while…