Software Engineering Jobs in United Kingdom

Python Developer

New HybridUKContract

Agile API Api Design AWS Azure +8 skills

A 6-month contract Python Developer role (likely to extend) at a global data-driven technology company, hybrid with 2 days/week on-site in London. Day to day: building and maintaining full stack web applications with a Python/Django backend, developing RESTful APIs, working with relational databases, and contributing to architecture and code reviews.

Radley James

Core Python Developer - (Prop Trading Firm)

C++ DeFi Linux Machine Learning PostgreSQL +2 skills

A Core Python Developer joins a small engineering team at a global algorithmic trading firm in digital assets, building exchange data pipelines, real-time reconciliation and alerting, internal trading GUIs, OTC settlement automation, and research/ML data platforms. Core stack: Python, SQL (PostgreSQL), Linux, with optional C++.

DW Search Ltd.

Python Developer

New UKSenior

Agentic AI AI LLM Machine Learning Python +1 skills

Hands-on Senior Python Engineer role at a major global financial services organisation in London, building production AI-enabled applications using LLMs, agentic AI and machine learning to support front-office trading decisions across the full software lifecycle.

Referment

New HybridUKFull-timeSenior

Senior Python Developer (C602DE0)

Agile CI/CD C++ Fintech Java +2 skills

Senior Python developer joining a UK wealth technology company whose in-house-built platform serves financial advice firms (portfolios, custody, execution, reporting). Hands-on engineering with mentoring, code reviews, and turning business requirements into scalable, secure software; hybrid role, three days a week in central London.

Futureheads Recruitment Ltd

Python Developer

Open 6d RemoteUKContract

Urgent 6-month Python contract (£600–800/day outside IR35) with a consumer health company near Old Street, London, whose app combines blood-test results, wearable data and medical history. You'll do hands-on full-stack Python work, owning features on a weekly delivery cadence and using AI coding tools throughout development.

AI Data Pipelines Python

600 – 800 £ / day

Adele Carr Recruitment Limited

Java Developer - Contract - &380-&400 - Outside IR35 - Remote

New RemoteUKContract

AI Angular AWS CI/CD Claude Code +7 skills

Fully remote 6-month contract (outside IR35, likely extendable) for a full stack Java developer at a growing UK technology business. Day to day: building backend services with Java (Micronaut or Spring Boot), Kafka data streaming, and an Angular front end on AWS, using AI-assisted coding tools like Claude Code.

380 – 400 £ / day

GIOS Technology Limited

Software Engineer

AI API Docker Generative AI Git +13 skills

A hybrid software engineer role in Manchester (4 days/week in office) building Java and Python microservices with Spring Boot and heavy Oracle SQL/PL-SQL work, deployed via Docker, Kubernetes, and Jenkins. GenAI/LLM experience and banking or financial services background are highly desirable.

eTeam Workforce Limited

Software Engineer

New HybridUK

Agentic AI Agile AI API Automation +42 skills

A 2-month contract Software Engineer role (hybrid in Manchester, 4 days onsite) building and maintaining enterprise Java/Python Spring Boot applications, optimizing SQL/PL-SQL databases, and integrating generative AI (LLMs, RAG, LangChain, vector DBs), with CI/CD via Jenkins, Docker and Kubernetes. Pays £340/day PAYE through an umbrella company.

Lead Java Engineer & Tech Lead — Spring, Kubernetes

Experis Austria is hiring a hands-on Lead Java Engineer / Tech Lead for a major modernisation programme in a hybrid role based in Telford, UK. The person designs and builds scalable Java services (Spring Boot on Kubernetes) while guiding multi-disciplinary teams across the project lifecycle and communicating with stakeholders.

Java Kubernetes Spring

CBSbutler Holdings Limited trading as CBSbutler

Lead Java Engineer - Spring, Kubernetes | Onsite in Telford

Lead Java Engineer on a 12-month UK modernisation programme: hands-on development plus technical leadership of Java/Spring services on Kubernetes, owning low-level designs, mentoring engineers, and driving architectural best practices, with two days per week on-site in Telford.

Low-Latency Java Engineer for Front Office Trading

Vertus Partners is recruiting low-latency Java developers on behalf of a leading investment bank to build front-office algo and eTrading systems. Day to day: designing high-performance, low-latency Java applications, tuning throughput, profiling bottlenecks, and working with cross-functional teams.

Java

GIOS Technology Limited

Senior Software Java Engineer - Modernization/Transformation / Spring Boot, Spring Cloud, RESTful APIs/microservices

New UKSenior

Java Kubernetes React Spring

Senior/Lead Java engineer accountable for low-level design, solutioning, and leading technical delivery of tax administration modernization services, working hybrid (2 days) from the Telford office. Core stack: Java, Spring Boot/Cloud, RESTful microservices, Kubernetes, and platform integration; React and tax-domain experience preferred.

CBSbutler Holdings Limited trading as CBSbutler

Lead Java Engineer – Modernisation Tech Lead (Onsite Telford)

New UKLead

CBSbutler is hiring a Lead Java Engineer for a 12-month modernisation programme in Tax Administration in Telford, onsite 2 days per week at 75-79 GBP/hour (Inside IR35, PAYE). The tech lead owns low-level designs, drives delivery of scalable Java services, and mentors engineers alongside architects and QA leads.

Senior Java Engineer: Low-Latency Trading Systems

New UKSenior

A Senior Java Developer will build and own low-latency Order Management Systems close to the trading lifecycle for a technology joint venture in banking and financial services, shaping architecture and performance alongside Front Office traders. Core tech: Java, high-performance/low-latency trading systems.

Senior/Lead Java Engineer — AI-Driven Delivery, Flexible

New HybridUKFull-timeC-level

Harvey Nash is recruiting Bristol-based Senior and Lead Java engineers for a flexible hybrid role (two days onsite). Day to day: building maintainable systems, solving complex problems, working with clients, mentoring teammates, and shaping technical direction, with a keen interest in applying AI within software engineering.

Low Latency Java Engineer (VP)

Accessibility AI C++ Java JVM +5 skills

Senior (VP-level) hands-on engineer in Citi's London-based High Performance Architectures team, writing low-latency Java/Rust event-sourced microservices (10-100 microsecond response times) and algorithmic trading utilities like market data replay and backtesting, enabling 100+ Markets eTrading teams while mentoring junior developers.

IntaPeople Limited

Lead Java Engineer - Greenfield Fintech, Hybrid Cardiff

AWS Java PostgreSQL React Spring

Engineering Team Lead for a greenfield fintech in Cardiff: developing engineers, setting goals, and doing some hands-on coding with Java 25, Spring Boot, React, Postgres and AWS. Hybrid role with three days a week in the Cardiff city centre office; £75,000 base plus up to 20% bonus (total package up to £90,000).

Lead Java Engineer — Modernisation & Scalable Services

New UKLead

A hands-on technical lead role on a major enterprise modernisation programme: designing and delivering scalable Java-based digital services, producing low-level design documents (LLDs), guiding development teams, and driving high-quality delivery from design through implementation. Based in Telford, UK.

Java

CBSbutler Holdings Limited trading as CBSbutler

Lead Java Engineer

New HybridUKContractLead

Java Kubernetes React Spring

Contract Lead Java Engineer (up to 12 months, inside IR35, PAYE) on a Tax Administration modernisation programme, hybrid with 2 days/week onsite in Telford. The engineer produces low-level designs, leads Java/Spring Boot service delivery on Kubernetes, and mentors engineers through the build phase.

Low-Latency Java Engineer

A recruiter partner is hiring low-latency Java engineers for an investment bank's front-office algo and eTrading teams in London. Day to day you design high-performance Java applications, optimise throughput and latency, and fix bottlenecks, using latency-optimised libraries like Disruptor, Aeron or Chronicle.

Java Multithreading