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Developer United Kingdom, London Jobs (On-site work)

31 Job Offers

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Catastrophe Risk Data Automation and Reporting Developer
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Join Beazley as a Catastrophe Risk Data Automation and Reporting Developer in London. You will modernise reporting pipelines, automate workflows, and build scalable MI solutions using SQL, R, or Python. Ideal for candidates with strong coding skills, insurance exposure data experience, and a prob...
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United Kingdom , London
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Not provided
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Social Value Portal Ltd
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Front Office Developer
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Join a high-performing investment firm in London as a Front Office Developer. You will own and evolve critical business platforms, working closely with senior stakeholders in a small, collaborative team. We seek strong SQL Server and C# .NET skills, plus experience in financial services or data-c...
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United Kingdom , London
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170000.00 GBP / Year
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Hunter Bond
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Platform Developer
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Join Vodafone as a Platform Developer in London, UK, to design and maintain cloud-native software components for secure, scalable digital platforms. You’ll work in agile squads using Java, Kotlin, or Python, with microservices, AWS/Azure, Docker, and Kubernetes. Key benefits include exposure to m...
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United Kingdom , London
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Vodafone
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Senior Quant Developer
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Senior Quant Developer sought by a top London quantitative fund to join a core systematic trading team. You will productionise models and build high-performance infrastructure using Python and C++. This role demands exceptional CS fundamentals and a collaborative, low-ego mindset. Join a world-cl...
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United Kingdom , London
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200000.00 GBP / Year
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Hunter Bond
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Senior Developer
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Senior Developer sought to redefine a market in London, UK. You will code in a cloud-native environment, building distributed services, APIs, and data-driven applications at scale. Key requirements include strong Java fundamentals, microservices architecture, and experience with relational/NoSQL ...
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United Kingdom , London
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100000.00 - 120000.00 GBP / Year
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Linux Recruit
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Python Developer
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Join a top London tech house as a **Python Developer**, building the world’s most scalable financial data platforms. You’ll leverage **Python**, **REST microservices**, and **big data tools** (Spark, Kafka) to solve complex challenges. Collaborate with elite engineers in a role offering a **£140,...
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United Kingdom , London
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140000.00 GBP / Year
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Hunter Bond
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It Integrations Developer
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We are seeking an IT Integrations Developer to build and support modern applications and integrations across internal systems and external SaaS platforms in London. You will leverage PHP (v8+), Azure PaaS, and frameworks like Laravel to design scalable, secure API solutions. Key requirements incl...
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United Kingdom , London
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80000.00 GBP / Year
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Transact
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Quantitative Model Developer
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Join Barclays in London as a Quantitative Model Developer. Leverage your Master’s degree and Python expertise to build and maintain risk models for liquidity, collateral, and hedge accounting. Ideal for candidates with a strong background in financial mathematics and fixed income. Drive data anal...
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United Kingdom , London
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Barclays
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Quant AI/ML Model Developer VP
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Join Barclays as a VP Quant AI/ML Model Developer in London to build next-gen AI risk solutions. You’ll develop generative AI applications, LLMs, and RAG pipelines for high-impact finance projects. Requires Python, AI/ML expertise, and a quantitative degree. Shape greenfield capabilities in a cut...
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United Kingdom , London
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Barclays
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Salesforce Marketing Cloud Developer
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Seeking a skilled **Salesforce Marketing Cloud Developer** for a London-based role. You will design multi-channel journeys using Journey Builder, Email Studio, and Automation Studio, leveraging AMPscript/SSJS. Requires deep Marketing Cloud expertise and full UK Security Clearance (SC). Join a col...
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United Kingdom , London
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NTT DATA
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Full Stack Developer
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Join Barclays in London as a Full Stack Developer, driving innovation within investment banking’s Securitized Products division. Leverage your Angular and Core Java expertise to design high-quality software, mentor teams, and align technical solutions with business goals. Experience with Oracle, ...
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United Kingdom , London
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Barclays
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Senior Front Office Developer
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Senior Front Office Developer sought by Barclays in London to design and deliver high-quality software solutions using Python, Java, and .NET. You will tackle server-side and multi-threaded development in an Agile environment, collaborating across regions. Ideal candidates bring experience in web...
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United Kingdom , London
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Barclays
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Java (Kotlin) Developer (Agile, Test-Driven) Avp
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Join Citi as a Java (Kotlin) Developer (AVP) in London and engineer the future of global finance. You'll drive agile, test-driven development on the Core Prime Brokerage platform, leveraging CI/CD and automated testing. Essential skills include Java, TDD, and Kotlin experience is a plus. Enjoy 27...
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United Kingdom , London
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Citi
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IT Integration Developer
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Seeking an IT Integration Developer in London to bridge internal systems with cloud SaaS platforms. You will design secure, event-driven API integrations using Azure Integration Services (API Management, Logic Apps, Functions). Ideal for experts in API security, OAuth 2.0, and middleware developm...
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United Kingdom , London
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80000.00 GBP / Year
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Transact
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Fx It Developer
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Join a London-based FX team as an FX IT Developer, building and enhancing front-office trading systems. You’ll collaborate with traders and analysts, using C# or Java and SQL to deliver agile projects. Ideal for recent graduates (2:1+) with a passion for financial markets and strong communication...
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United Kingdom , London
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Crédit Agricole
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Salesforce Junior Developer
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Seeking a **Salesforce Junior Developer** in **London** to join an Agile team. You need 3+ years of experience with **Apex**, **Lightning Web Components**, and **OmniScript**. Key duties include configuring Sales/Service Clouds, implementing **Salesforce Flows**, and tailoring Lightning Record pa...
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United Kingdom , London
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NTT DATA
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Payment Solution Business Developer (POS)
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We are seeking a driven Payment Solution Business Developer (POS) to drive high-growth revenue in London. You will deploy and expand POS solutions through consultative selling, hunting new opportunities, and upselling to existing merchants. Ideal candidates possess proven POS sales experience and...
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United Kingdom , London
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Treatwel Industries
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Integrated Financial Crime Model Developer
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Join Barclays in London as an Integrated Financial Crime Model Developer. Design, build, and deploy machine learning models to enhance scalable, high-quality financial crime detection. Requires advanced Python, Databricks, and strong software engineering skills. Benefit from hybrid working, a wel...
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United Kingdom , London
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Barclays
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Python Developer
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United Kingdom , London
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Talan
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12 Month Internship - It Developer
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Join our London team as a 12-month IT Developer Intern, working directly with traders and risk analysts in foreign exchange trading. You’ll develop and enhance front-office systems using C# or Java, with exposure to SQL and Python. Ideal for recent graduates (2:1+) with strong analytical skills a...
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United Kingdom , London
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Crédit Agricole
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About the Developer role

Discover the dynamic world of developer jobs, a cornerstone of the modern digital economy. Developers are the creative and technical masterminds behind the software, applications, and systems that power our daily lives. From the websites we browse to the mobile apps we use and the complex enterprise software running global businesses, developers are the architects of our digital future. This profession involves designing, coding, testing, and maintaining the software that drives innovation across every industry.

A developer's primary responsibility is the entire software development lifecycle. This begins with analyzing user needs and then designing robust software solutions to meet those requirements. The core of the role involves writing clean, efficient, and well-documented code in various programming languages. Developers build and maintain the backbone of applications, which includes creating and managing Application Programming Interfaces (APIs), backend services, and database structures. They are responsible for implementing key architectural patterns like microservices to ensure systems are scalable, reliable, and performant. A significant part of their work involves integrating different systems, such as connecting applications to databases, message queues, and third-party services.

Beyond initial creation, developers are tasked with continuous improvement and maintenance. This includes identifying and fixing bugs, optimizing applications for speed and stability, and implementing security best practices to protect against vulnerabilities. They conduct rigorous testing, including unit and integration tests, to ensure software quality. Furthermore, developers collaborate closely with other teams, such as frontend engineers, quality assurance (QA) specialists, and DevOps teams, to enable seamless continuous integration and deployment (CI/CD) pipelines. In many modern environments, developers also work on containerizing applications using tools like Docker and orchestrating them with platforms like Kubernetes. For senior and leadership roles, responsibilities expand to include mentoring junior team members, managing project timelines, making strategic technology decisions, and overseeing a team's output and professional development.

Typical skills and requirements for developer jobs are diverse. A strong foundation in computer science principles is essential. Proficiency in one or more programming languages (such as Go, Java, Python, JavaScript, or C#) is a fundamental requirement. Developers must understand software architecture, including concepts like RESTful APIs, microservices, and event-driven systems. Experience with databases (SQL and NoSQL), version control systems like Git, and operating systems is standard. As the field evolves, knowledge of cloud platforms (AWS, Azure, GCP), containerization, and infrastructure-as-code is increasingly valuable. Crucially, soft skills are just as important; problem-solving abilities, analytical thinking, clear communication, and the capacity to work collaboratively in a team are highly sought after. Most positions require a bachelor's degree in computer science or a related field, or equivalent practical experience. Whether you are an entry-level programmer or an experienced applications development manager, developer jobs offer a challenging and rewarding career path for those passionate about building the technology of tomorrow.