138,482+ Lead Java Application Developer Java Web Tech Jobs in London, UK — Local Employers Hiring June 2026

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Senior KDB+ Developer

Overview We are seeking an experienced Senior KDB+ Developer to design, develop and optimize high performance data platforms built on kdb+. The ideal candidate will have deep expertise in kdb+ tick architecture, performance tuning at scale and close collaboration with business stakeholder - parti ...

Trading Systems Developer

Trading Systems Developer NextWave Consulting is hiring a mid level Trading Systems Developer to support the build and evolution of financial services technology platforms. This role sits close to trading and data systems and focuses on developing applications, APIs, and data workflows us ...

Trading Systems Developer

Trading Systems Developer NextWave Consulting is hiring a mid level Trading Systems Developer to support the build and evolution of financial services technology platforms. This role sits close to trading and data systems and focuses on developing applications, APIs, and data workflows us ...

SQL Developer Contract

SQL Developer – Contract A Lloyds insurer is seeking a skilled SQL Developer to join their growing team. The successful candidate will be responsible for designing, developing, optimising, and maintaining SQL databases and data solutions that support business‑critical applications and reporting re ...

Python Fullstack Developer

We are seeking a highly skilled Senior GenAI Engineer/ Python Fullstack Developer to join our team and lead the development of next-generation AI-powered solutions. This role is ideal for a hands‑on engineer with strong expertise in Generative AI, Large Language Models (LLMs), Knowledge Graphs, M ...

Salesforce Administrator/Developer

LSE is committed to building a diverse, equitable and truly inclusive university. Academic Registrar’s Division: ARD Systems Salesforce Administrator/Developer Salary: £43,277 to £51,714 per annum inclusive with potential to progress to £55,497 per annum, including Londo ...

SAS Model Developer

SAS Model Developer Location: London (Hybrid - 2 days onsite per week) Rate: £400/day Inside IR35 Duration: 3-month rolling contract Overview We're looking for an experienced SAS Model Developer to support model development, enhancement, and ...

C# .Net Developer

Senior C# / .NET Developer (Securities Lending & Repo) Role Type: 6-Month Contract Location: London (Hybrid - 3 days onsite per week) IR35 Status: Inside IR35 Role Overview A leading global financial services and asset servicing institution is seeking an experience ...

Email Designer & Developer

About the Role We are currently recruiting for an Email Designer and Developer to bring creative vision and technical expertise together to design and build engaging, high-performing email campaigns that deliver meaningful customer experiences. Key Responsibilities Design and ...

eTrading Python Developer

Location: London (Hybrid – 3 days in office)Type: Full‑time Are you ready to step into a high-performance environment at the heart of global markets? We're looking for a motivated and technically skilled eTrading Production Support Engineer to join our fast‑paced Application Sup ...

Network Automation Developer

Network Automation Developer (Python & Ansible) Certain Advantage is hiring for a Network Automation Developer based in London. This role is on a initial contract basis till the end of the year and is hybrid, with employees required to be onsite 3 days per week. (High potential for an ext ...

C# .Net Developer

Senior C# / .NET Developer (Securities Lending & Repo) Role Type: 6-Month Contract Location: London (Hybrid - 3 days onsite per week) IR35 Status: Inside IR35 Role Overview A leading global financial services and asset se ...

Senior Software Developer

Purpose of the role To design, develop and improve software, utilising various engineering methodologies, that provides business, platform, and technology capabilities for our customers and colleagues. Accountabilities Development and delivery of high‑quality software solutions by ...

Senior C++ Developer

Requirements You should have a strong knowledge of C++ and object-oriented development, a good understanding of software engineering principles, and excellent problem-solving skills Don’t meet every single requirement? At Swift, we are dedicated to building a workplace where peopl ...

Senior Informix Developer

The Core Systems Informix Developer is a key member of the Core System Team, responsible for contributing to the delivery of functional objectives, always modelling the Post Office behaviours, and demonstrating a Postmaster and Retailer first mindset. The Core Systems Informix Developer will suppor ...

Senior Beacon Developer

Senior Beacon Developer | Competitive Salary + Uncapped Bonus | Permanent Industry: Commodity TradingLocation: London, UKJob Type: Permanent Our client is a global commodity trading firm building a strategic Beacon platform to support real‑time posi ...

Risk Software Developer

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth and depth of coverage a ...

Process Automation Developer

This is an exciting opportunity to join Delta Capita’s fast‑growing Consulting business, delivering innovative workflow and automation solutions within complex financial services environments. Process Automation Developers design, build, and maintain scalable workflows using low-code technologies, ...

Senior IAM Developer

This is an excellent opportunity to advance your career within a leading organisation operating at the forefront of technology, media and digital innovation. Working within a highly skilled Cyber Security team, you will play a pivotal role in shaping and enhancing Identity and Access Management (IAM) capabili ...

Senior Android Developer

Help us use technology to make a big green dent in the universe! Kraken powers some of the most innovative global developments in energy. We’re a technology company focused on creating a smart, sustainable energy system. From optimising renewable generation, creating a mo ...

Graduate Software Developer

We have an excellent client offering an exciting opportunity for a Graduate Software Developer to join a high-performing team building cutting-edge trading and research systems. This role is ideal for a recent graduate eager to work on real-world, high-impact applications while developing strong technical ...

Power BI Developer

We are seeking Power BI Developers to design, build, and optimise management information and reporting solutions that support critical business processes. Working across workflow and integration data layers, you will transform complex datasets into clear, actionable insights for stakeholders. As pa ...

Go Developer (Integration)

Job Details Job Title: Go Integration DeveloperLocation: Remote (but able to get to Cheltenham or London)Salary: £55,000Start Date: Months Notice (latest)Interview Process: 2 Stage Organisation Overview Our Client is a lea ...

Quantitative Developer Equities

Our client is a leading AI/ML Asset Management firm headquartered in London and is seeking a C++ Quantitative Developer front office technology for strategies development to contribute to the globally experienced team. The firms team integrates innovative technology and trading strategies, while utilizing a s ...

Contract Quant Developer

This range is provided by Oliver Bernard. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Oliver Bernard Founder - .NET in London | Associate Director - Oliver Bernard <stron ...

Back End Developer

Overview Recruitment Consultant at TechShack London. Senior - Lead Backend Developer | Node, Typescript, MongoDB | Hybrid, up to £90k We’re looking for a highly experienced Backend Developer to join a fast-growing, ambitious start-up. This is a chance to design and build robust, scalable sy ...

Senior Salesforce Developer

Our client is looking for a Senior Salesforce Developer responsible for hands-on Salesforce development and platform optimisation. This role focuses on designing and delivering scalable, high-performing solutions across Salesforce Service Cloud and Marketing Cloud. Location: London, United Kingdo ...

Hadoop Scala Developer

Belhati is one of the competitive consulting companies, headquartered in United Kingdom that provide cutting-edge technology solutions, that enable businesses to thrive in the digital era. We specialize in Cloud, DevOps, Data Science, Blockchain, IoT, and Metaverse technologies, and our team of experts is ded ...

Software Developer (Treasury)

Overview Get AI-powered advice on this job and more exclusive features. Direct message the job poster from McGregor Boyall. A leading global multi-strategy investment firm is looking for a Software Developer to join their Front Office Treasury team , focused on building next-genera ...

Back End Developer

Overview Product-Focused Backend Engineer – Functional Programming & Distributed Systems At Ncounter, we’re partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers us ...

Business Intelligence Developer

Overview Head of Data - Building Tech Teams Globally - AI and Data Enthusiast — London (Hybrid / Flexible Working). About the Company We are partnered with a rapidly growing UK-based start-up specialising in the supply of high-quality raw materials for two critical in ...

Power BI Developer

Get AI-powered advice on this job and more exclusive features. This range is provided by Harnham. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Harnham Senior Recruitment Co ...

Salesforce Integration Developer

Overview Network IT is recruiting for a Salesforce Integration Developer to join a leading financial services organisation. In this role, you will work closely with the Salesforce Technical Lead and Architect to design, build, and maintain integrations across Salesforce FSC, third-party SaaS ...

Senior C++ Developer

Direct message the job poster from Nicoll Curtin I am seeking a Senior C++ Developer to join my client, a leading investment bank based in London. You will be responsible for developing and optimizing systems that support a variety of processes, including research, trading, risk management, and settlem ...

Python Backend Developer

Join to apply for the Python Backend Developer role at Falcon Smart IT (FalconSmartIT) . We are seeking a senior developer with extensive experience in building scalable Python backend solutions. The ideal candidate should be proficient in supporting dozens of concurr ...

Senior KDB Developer

Overview Principal Technical Recruiter @Reed Technology, Data Science Matchmaker: Uniting Tech Wizards Across Europe and the UK Since 2016 Rolling 12-Month Contract | Up to £1000/day | Inside IR35 Hybrid – 2 Days Onsite in London A leading inves ...

Quantitative Developer Python

Overview Quantitative Developer | Structured Finance | VP / Director Level — A fast-growing London-based investment firm at the cutting edge of fixed income and structured credit is looking for a quantitative developer to join a small, highly technical team building proprietary pricing and risk in ...

Senior Quantitative Developer

We are seeking an experienced Senior Manager OR Director (SVP to Director Level) to join our Quantitative Finance advisory practice, focused on Financial Engineering and delivering analytics platform solutions to clients. In this role, you will leverage your deep quantitative development expertise to advis ...

Quantitative Python Developer

We are looking for a Python Developer with strong experience in trading and risk management systems within investment banking. The role involves building backend applications and data processing logic supporting risk calculations, trade workflows and reporting. Key Responsibilities ...

Senior Quantitative Developer

Compensation: Competitive (Financial Services) About TradingHub Founded in 2010, TradingHub delivers uniquely intelligent trade surveillance software to world leading financial institutions. Developed by market professionals, our solutions use sophisticated modelling techniques to detec ...

Graduate Quantitative Developer

DeepFin is a systematic proprietary trading firm combining deep learning, traditional quantitative research methods, and cutting‑edge trading technology, to trade global markets. Founded by engineers and researchers, we build and deploy advanced trading systems that operate across global markets. Ou ...

Junior Quantitative Developer

Engineer page is loaded## Engineerlocations: London, United Kingdomtime type: Full timeposted on: Posted Todayjob requisition id: R LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a commit ...

Senior Quantitative Developer

Clearwater Analytics is the leading SaaS platform for investment accounting, risk, and performance. We serve some of the world’s largest insurance companies, hedge funds, asset managers, and institutional investors. We deliver decision-ready risk analytics that bring clarity and insight to multi‑asset port ...

Senior C++ Developer

Get AI-powered advice on this job and more exclusive features. Direct message the job poster from Peaple Talent Senior C++ Developer | Remote | Permanent | Up to £85,000 Per Annum (Dependant on Experience) Peaple Talent have partnered with a consultancy client looking to ...

Junior Model Developer

Overview Join to apply for the Junior Model Developer role at hyperexponential . Model Development at hyperexponential The hyperexponential Model Development team (MDT) is a unique blend of engineers, actuaries, mathematicians and data scientists. We don’t take ...

Back End Developer

Overview ClimateTech Start-up | London Bridge | 4 days onsite. Tired of being just another engineer? Here’s your chance to be the third backend hire at a fast-growing ClimateTech start-up making a real dent in global carbon emissions. This role focuses on building a scalable backend and shaping th ...

Junior Developer (C#)

Join to apply for the Junior Developer (C#) role at Remarkable . This range is provided by Remarkable. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Remarkable </p ...

Senior Quantitative Developer

## Senior Quantitative DeveloperApplylocations: Office - Londontime type: Full timeposted on: Posted Todayjob requisition id: R7254Clearwater Analytics is the leading SaaS platform for investment accounting, risk, and performance. We serve some of the world’s largest insurance companies, hedge funds, ass ...

Quantitative Developer, VP

We are seeking an experienced Quantitative Developer to join the Numerical Performance Group (NPG), a central specialist team within Citi’s Markets Quantitative Analysis (MQA) organisation. NPG designs, develops, and deploys 'roots', Citi’s core high‑performance C++ numerical library, which underpins prici ...

Senior Salesforce Developer

Job Type: Permanent Location: London Are you passionate about driving innovation and best practices in Salesforce? We have an exciting opportunity for you – Senior Salesforce Developer! TCS is a purpose‑led transformation company, built on belief. We do not just help ...

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