Harrington Starr - IT - Software Development

Join a leading quantitative trading firm in London as a Quantitative Researcher. You will develop systematic trading and market-making strategies, leveraging Python and statistical modelling on large datasets. Ideal for candidates with an advanced degree in a quantitative field and experience in ...

Senior Software Engineer sought by a fast-scaling London fintech transforming FX and treasury operations. You will build high-impact, cloud-native trading systems using C#/.NET, SQL, and microservices. Ideal for engineers with 5+ years’ experience in financial technology. Join a collaborative tea...

Customer Success Manager sought for a Financial Services SaaS platform in London/Hybrid. This new role builds a CS function, driving platform adoption and value for fund managers. You will own senior client relationships, identify upsell opportunities, and shape best practices. Offering £75k-£100...

Seeking a skilled **Software Engineer** with expertise in **NodeJS** and **TypeScript** for a London-based role. You will build robust trading systems within a Front Office environment, leveraging **AWS Cloud** and **Terraform**. Requires a 2:1 in Computer Science and experience with **React** an...

Join an AI-first NYC scale-up as a Full Stack Engineer. You’ll own backend services with Node.js/TypeScript, build React UIs, and manage AWS cloud infrastructure. Requires 5+ years experience, strong CI/CD and PostgreSQL skills. Ideal for engineers seeking ownership and growth in a cutting-edge e...

Join a global payments leader in Portugal as a **Software Engineer** specializing in **NodeJS** and **TypeScript**. You’ll build cutting-edge B2B payment systems, working across the full SDLC on trading and analytics platforms. Ideal for engineers with **AWS**, **Terraform**, and **React** skills...

Head of Software Engineering (NestJS) sought by a global financial payments firm in London. Lead a team of 20 engineers, owning the architecture and delivery of a core payments platform. Requires senior leadership experience, hands-on NestJS, TypeScript, and NodeJS skills, plus deep fintech domai...

Principal C++ Engineer sought for a front-office options desk in London, building a brand-new trading stack. You will leverage deep C++ and Linux expertise, including multi-threaded programming, to design and implement bespoke automated trading software. This role demands strong engineering princ...

Senior Electronic Trading Architect needed for a critical sell-side modernisation programme. You will lead the FIX adapter migration to Onix FIX, defining low-latency execution and market-making architecture. This high-trust advisory role requires deep expertise in FIX connectivity, Java performa...

Technical Pre-Sales Engineer role in London, hybrid working, circa £90k + bonus. Join a global enterprise tech firm, designing observability and monitoring solutions for top financial institutions. Requires 3+ years pre-sales experience with APM tools like Dynatrace or AppDynamics, plus Linux and...

Join a London-based Digital Currency Investment Platform as a **Software Engineer** specializing in **NodeJS** and **TypeScript**. You'll build cutting-edge web systems for global digital markets, leveraging **AWS** and **Terraform**. Ideal for engineers with a Computer Science degree and experie...

We are hiring a DevOps Engineer to scale and operate a cloud-native SaaS platform for global financial services. You will leverage AWS, Kubernetes (EKS), Terraform, and CI/CD to enhance platform reliability and automate infrastructure. Ideal candidates have 2+ years in DevOps or SRE, with strong ...