Full Stack Engineer
London / Hybrid | 4 Days Onsite
FTC £70,000 - £85,000
Harrington Starr has partnered with a leading financial services firm who are undergoing a major transformation of its internal technology landscape, modernising a suite of business-critical applications used across front office, compliance and operations teams.
They are now looking for an experienced Full Stack Engineer to join their Technology function and play a key role in migrating legacy SharePoint systems into a modern application portal built with contemporary web technologies. This is a high-impact role working closely with both technical teams and senior business stakeholders.
Key Responsibilities:
* Design and build full stack applications using C#, SQL Server and React
* Support and maintain live SharePoint applications during the transition phase
* Work within agile sprint cycles to deliver high-quality solutions
* Collaborate with business users to translate requirements into technical designs
* Ensure compliance with cyber security, data protection and regulatory standards
* Act as a technical escalation point within the Technology team
* Produce clear documentation and support knowledge transfer to BAU teams
* Work with third-party vendors where required
Key Requirements:
* 3+ years’ experience building applications with C#, SQL and React
* 2+ years’ experience developing or supporting SharePoint systems
* Strong front-end skills (HTML, CSS, JavaScript)
* Experience working in agile delivery environments
* Exposure to regulated industries (financial services preferred)
* Strong communication skills and stakeholder management ability
Key Benefits:
* Work on a large-scale modernisation programme with real business impact
* High level of autonomy and technical ownership
* Exposure to multiple areas of financial services
* Hybrid working with flexibility
* Opportunity to shape long-term internal platforms
This is an excellent opportunity for a hands-on Full Stack Software Engineer to join a highly visible programme of work within a regulated financial environment. You’ll be responsible for redesigning and rebuilding core internal applications, ensuring they are scalable, secure and aligned with long-term business needs.
You’ll be involved across the full lifecycle — from requirements gathering and system design through to development, deployment and handover into support.
Please apply via the link provided or reach out for a confidential conversation.