26 to 50 of 86 Senior Developer Jobs in London

Senior Python Developer - Banking London, UK | Hybrid | c.£ depending on experience Permanent Brief We're hiring a Senior Python Developer to join a high-performing engineering team within a banking environment. Key Responsibilities Build and scale Python-based backend systems and APIs Work on high-availability ...

Senior NetSuite Developer £500 - £550 per day (Outside IR35) This freelance opportunity offers the chance to lead complex NetSuite transformation programmes across multi-entity, international environments. You will take ownership of end-to-end solution design and delivery, working closely with senior stakeholders to shape scalable NetSuite … NetSuite solution architecture and delivery across multi-entity and multi-country implementations. Run discovery workshops, requirements gathering, and process mapping with senior business stakeholders. Design and deliver NetSuite configurations, customisations, and workflows across core finance and operational processes. Architect and oversee integrations between NetSuite and third-party systems including ...

Senior C# Developer | FX Platform | Investment Management | London We’re partnered with a leading investment management firm with a strong global footprint, currently investing in the build-out of its in-house FX, trading and investment technology platforms. The business operates in a highly data-driven environment where … plays a key role in supporting investment teams, trading workflows, portfolio decision-making, risk visibility and operational efficiency. They’re now looking for a Senior C# Developer with strong financial markets experience and a clear understanding of how an FX platform works end to end . This ...

Title: Senior KDB+ Developer Location: London, UK (Hybrid) Job Type: Contract - Inside IR35 Role 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 ...

Senior Software Developer, AI Engineering, London, COR7550 Are you a Software Engineer with a passion for AI and building scalable systems from the ground up? This is a rare opportunity to join as an early member, shaping both the technology and the engineering of an ambitious product … Role As a Senior Software Engineer, you’ll play a pivotal role in designing and delivering a modern, AI-driven platform. Your work will span multiple areas, from developing intelligent systems and data pipelines to contributing to scalable SaaS infrastructure. You’ll help define architecture, improve developer workflows ...

Senior C++ Developer (Hybrid, UK-Based) Location: London Salary : £80,000 - £100,000 + EMI Share Options + Private Medical Insurance Vacancy Type: Full-time, Permanent We take care of time, so our customers don’t have to. At Hoptroff, we build nanosecond-accurate, software-driven timing systems … eternity, our software is what’s keeping the world in sync. We’re entering an exciting phase of growth and looking for a Senior C++ Developer to join our small, high-calibre engineering team. You’ll write modern C++ (C++20 or later) at the heart of our Linux ...

Senior Golang Developer - Kubernetes - Financial Services Excellent opportunity opens for an experienced Developer strong on Golang with experience in AWS and Kubernetes to join a highly regarded Financial Services entity's London office. You will act as the team lead and play a key role in building … Datadog. Interested? Please Apply! Golang Go AWS Kubernetes Terraform Bank Banking Finance Financial Services Crypto Blockchain Web3 Trading Exchange Digital Assets Hybrid Flexible Developer Software Engineer Backend Developer Golang Engineer Kafka Apache Kafka RabbitMQ AWS Lambda Cloud Platform ...

Title: Senior Full Stack Developer (React & C#.NET) Contract Length: 12 Months Location: London - 3 Days a week Daily Rate: Circa £650/Day (Inside IR35) About the Role Join our dynamic team as a Senior Full Stack Developer, where your expertise in React JS and C# ...

Senior C# Developer/Backend Software Engineer (C# .Net) Newcastle onsite to £130k+ Are you a Senior C# Developer looking to escape the hustle and bustle of London and relocate to somewhere with stunning scenery and a better quality of life (there's also great restaurants ...

Senior Django/Python Developer Pay Rate: up to £700 (Inside IR35 - Umbrella) Duration: 6 months' Working arrangement: Once a every 3 months - London We're working on behalf of aFTSE 100 leading UK retailer, supporting the expansion of a highly successful AI-driven Smart Pricing programme. Following … results across well-known UK household brands, the organisation is now extending this platform across its European operations and is looking for an experienced Senior Django/Python Developer to support the next phase of delivery. This is a pure backend role, focused on scalable, high-quality Python ...

Senior Python Quant Developer London (Hybrid) The company A growing fintech business building advanced analytics and execution technology for institutional clients across the derivatives space. Their platform is used by leading hedge funds and asset managers to support relative value, volatility, and macro trading strategies. The environment combines … strong engineering standards with close interaction between trading, research, and technology teams. The role This is a senior engineering technology role focused on the core analytics platform that underpins pricing, screening, and execution workflows. You’ll play a key part in designing and evolving production systems used by traders ...

Senior Salesforce Developer (FSC/Data Cloud/Marketing Cloud) London (Hybrid) Up to £90,000 + Benefits UK Passport Holders/ILR Only. We're hiring a Senior Salesforce Developer to play a key role in a major platform transformation across Financial Services Cloud, Data … Data Cloud concepts (segmentation, identity resolution, data modelling) Experience integrating Salesforce with external systems Familiarity with Agile and CI/CD practices Salesforce Platform Developer I (or working towards) Nice to have: Financial services or regulated industry experience Exposure to Marketing Cloud Next/Advanced Data Cloud or Marketing ...

Banking client is seeking to recruit a Senior Full Stack Developer (React & .NET Core) on an initial 6 month based in London. It is hybrid and will require 3x days onsite per week. About the Role We are seeking a highly experienced Senior Full Stack Developer ...

Banking client is seeking to recruit a Senior Full Stack Developer (React & .NET Core) on an initial 6 month based in London. It is hybrid and will require 3x days onsite per week. About the Role We are seeking a highly experienced Senior Full Stack Developer ...

Senior Web Application Developer ASP.NET MVC 5, C#, & React Location: Hybrid 3/4 days p/w onsite West London Must have right to work in the UK and located near West London 3 months contract (extension TBC) Start ASAP (Immediate start/within 2 weeks notice … Inside IR35 contract £425pd - (£538pd rate to umbrella) Equivalent Approx salary Pro rata £(Apply online only)k Seeking a Senior Web Application Developer (ecommerce) with Minimum 8 years of Web application development experience consisting of strong C#, ASP.NET MVC 5, and React. Strong knowledge of Object-Oriented Programming ...

SENIOR FRONT END DEVELOPER Salary up to £65-80k Hybrid working - 3 days per week on-site in Bromley Modern front-end stack - Vue.js, JavaScript, HTML, CSS Opportunity to shape user-facing products in a growing tech team ABOUT THE CLIENT We're working with a growing ...

Senior Frontend Engineer, London Salary - 80,000 – £100,000 + bonus Location - London | Hybrid (2–3 days in office) A new Senior Frontend (React.js) Engineer is needed to join new team building a brand-new data platform for the Financial Services sector. This is a rare opportunity … sophisticated dashboards, visualisations, and exportable reports Shape key architectural decisions for scalability and performance Collaborate closely with design and backend teams in a small, senior squad Leverage AI-assisted tooling to accelerate development and innovation You Will Need – Strong experience with JavaScript, React and modern frontend architecture Proven track ...

Senior Java Developer - Financial Services, Capital Markets sought by city based organisation. Essential * 7+ years Java development experience in Financial Services, Capital Markets * Clear progression to Head of Engineering role within 12 - 24 months * Strong expertise in Java 11+, Spring/Spring Boot * Experience with multi-threading, performance ...

Global brand hiring: Senior AWS/Full Stack Engineer - 12 month contract - Remote/UK based🚀 I’m looking to connect with experienced engineers who thrive in cloud-native environments and enjoy building scalable, data-driven applications. 🔧 What we’re looking for: • 5+ years working with AWS services including ...

Title: Senior C#/.NET Developer - Financial Services (Risk/Securities Lending) Location: London (Hybrid) Duration: 6 Months contract Job Description Role Overview We are seeking an experienced C#/.NET Developer to join a technology team supporting critical Financial Services platforms, with a strong focus ...

Senior Full Stack Developer - 2 days a week in London - £60-80k I am looking for a Full-Stack Developer to join a fast-growing data and analytics company working at the intersection of data engineering, software development, and AI. This will be to design … FastAPI, Flask, or Django) Develop modern frontend applications using React and TypeScript Design and maintain RESTful APIs 5+ years’ experience as a full-stack developer AI & Modern Development Practices (Required) Experience using AI coding tools or assistants in day-to-day development Understanding of large language model (LLM) fundamentals ...

Excellent opportunity for a Senior Software Developer to play a key role in architecting, developing, and enhancing our clients in-house trading and research systems. This is an opportunity to work on greenfield projects, influence architectural decisions, and directly impact systems that support real-world trading strategies. … senior member of the team, you will contribute both technically and strategically, helping shape development standards, performance optimisation, and system scalability. You will primarily work within a C# .NET SQL Server ASP.NET ecosystem, developing high-performance, reliable, and maintainable applications. Key Responsibilities Design, develop, and maintain high-performance applications ...

Role : Avaloq Developer Location: Scotland, UK (Remote) Contract Duration : 10 Months Job Description: An Avaloq Developer is responsible for the end-to-end design, implementation, customization, and unit testing of solutions within the Avaloq Banking Suite click apply for full job details ...

Role : Avaloq Developer Location: Scotland, UK (Remote) Contract Duration : 10 Months Job Description: An Avaloq Developer is responsible for the end-to-end design, implementation, customization, and unit testing of solutions within the Avaloq Banking Suite. The role involves delivering high-quality parameterization, scripting, interfaces, and report development ...

client is in the Financial Sector and is looking to grow the team with a new Senior Developer. This role can be done remote with weekly meet ups in Central London on a Wednesday. The technology function is around 80 people total and you will work in an Agile … team of 8. Client Details Our client is in the Financial Sector and is looking to grow the team with a new Senior Developer. This role can be done remote with weekly meet ups in Central London on a Wednesday. The technology function is around 80 people total ...