Senior Software Engineer

Software EngineerLondon / Remote | Perm Role£80,000 - £100,000Harrington Starr has partnered with a fast-growing fintech that’s transforming how businesses manage foreign exchange and treasury operations. Their technology enables clients to access institutional-grade execution, automate manual workflows, and gain greater transparency across their financial processes. Handling billions in transactions each year, they continue to expand their product offering and deliver cutting-edge solutions that help clients manage risk more effectively.The RoleThis is an excellent opportunity for an experienced Software Engineer — ideally with a background in financial technology or FX — to join a high-performing engineering team within a scaling fintech. You’ll be instrumental in developing and enhancing the company’s core trading and treasury systems, building new features, improving performance, and driving integration across their technology stack.Key ResponsibilitiesDevelop and maintain software across the full stackContribute to architecture and design decisionsSupport, optimise, and maintain production codeResearch and integrate new technologiesFoster a culture of engineering excellence and continuous improvementKey Requirements5+ years’ experience working with C#/.NETExperience developing middle and back office systemsStrong SQL skillsExperience with cloud-native solutions (Azure or AWS)Knowledge of event-driven, microservices architecturesFull SDLC experience — from design through delivery and supportInterest and utilisation of AI technologiesKey BenefitsJoin a fast-scaling fintech building next-generation financial technologyWork on complex, high-impact systems handling large-scale transactionsCollaborative, innovative, and growth-oriented team cultureHybrid working model with flexibility and autonomyPlease apply via the link provided or reach out to me directly to book in a confidential phone call - ollie.bluck@harringtonstarr.com