Developer jobs in Hatfield

Role Overview: We are seeking a Senior Java Developer to join our Core Platform Team. This role is critical to building and maintaining the scalable backend infrastructure of our Live Casino platform, ensuring it can support high-concurrency gameplay, real-time interactions, and a distributed micros

Job Description Help traders to analyze and visualize their trading activities Work with trading and engineering to prototype, test, and integrate pricing and quoting models Contribute to core trading infrastructure: data ingestion, analytics, and monitoring Perform empirical research, back testing,

About Us We are one of the world’s leading commodities trading houses, leveraging sophisticated technology to trade a broad range of energy, metals, and agricultural commodities globally. Our success is driven by cutting-edge analytics, high-frequency data processing, and a commitment to innovation.

Seeking an experienced SharePoint Engineer to lead secure, compliant migrations and modernisation of document-heavy environments into SharePoint Online. The role focuses on unstructured data (documents, libraries, metadata, permissions, versions), security/compliance controls (data residency, Purvie

Junior JavaScript Developer (x2) London - Onsite £30-£45k Skills: Node, React, JavaScript, TypeScript, HTML, CSS Roc Search have partnered with a well-established, market-leading UK business looking to hire 2 Junior JavaScript Developers into their London-based engineering team. This is a great oppo

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 across fo

Volunteer for a startup building the data infrastructure to save our soil and water! 🚜🌱 EcoVerum unifies fragmented agricultural data into verified intelligence that rewards regenerative farming and enables truly sustainable supply chains. Ecosystems that took millennia to develop are being degrad

Senior Java Developer | £85,000 - £95,000 We're working with a leading financial services technology vendor on this exciting opportunity. Are you ready to spearhead a flagship platform rebuild at the heart of London’s fintech scene? This is your chance to architect and deliver high-performance, auto

Full Stack Developer - .Net React | £50,000 - £75,000 We're working with a dynamic logistics technology innovator on this exciting opportunity. They are launching a major digital transformation to bring their core engineering in-house, offering you the chance to be a founding member of a high-impact

Contract .Net Developer - Insurance claims system | £400 Per Day (Outside IR35) We're working with a leading specialist insurer driving a massive digital transformation on this exciting opportunity. This is a high-impact role where you will help overhaul a modern claims automation platform using the

Join us as a C# Pricing Developer at Barclays, where you'll be working on building out Barclay’s options product offering. In this role, you will be performing activities related to the design, development, unit testing, deployment, support, and maintenance of our options pricing engine, and working

We are seeking a Java Developer to join our FIF team. In this role you will assist in development and delivery of software solutions while collaborating with peers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives. To

Salary: £47,200 (National) or £51,200 (Croydon) plus skills allowance of up to £10,200 pending assessment. Location: Croydon, Manchester or Sheffield on a hybrid basis Advert Close: 11:55 pm Monday 4th May 2026 Please note that this role requires Security Check (SC) clearance, which would normally n

Senior Front End Developer | £50,000 - £70,000 We're working with an innovative and fast-growing technology business on this exciting opportunity. We are looking for a high-impact developer to join a fast-paced engineering team where you’ll have total ownership over the frontend ecosystem, spanning

Python Developer | £50 - £60 per hour We're working with a leading global financial technology partner at the forefront of Equities Derivatives innovation on this exciting opportunity. This is a high-impact role within the fastest-growing area of Equities Derivatives Technology, focusing on the soph

A well-established investment management firm is seeking a Mid-Level Python Engineer to support the development and ongoing improvement of Python-based applications used across the business. This is a hands-on role where you’ll contribute to building reliable, scalable systems, while working closely

We are looking for a Java Developer with experience in capital markets and risk systems , working on backend services, APIs and data processing components supporting trading, risk calculations and reporting. Key Responsibilities Develop and enhance Java-based backend applications for trading and ris

About Us We are a young anti bullying charity, looking for someone with web developer experience and passionate about volunteering for a good cause. What difference will you make? As we are a young charity this contribution will help us reach more audiences at 0 cost. Our audience is made of target

Oracle Developer | £45,000 - £55,000 We're working with a tech-forward enterprise software consultancy on this exciting opportunity. They are known for building high-performance, database-driven applications that power mission-critical operations for global clients. This is a rare chance for a heavy

NET Developer | £45,000 - £65,000 We're working with Europe's largest and most profitable commercial radio group on this exciting opportunity. Step into a high-octane engineering environment where you will transform traditional radio into interactive digital brands across mobile, web, and digital TV