Software Developer, Web Developer, IT Support

We're looking to engage an experienced Full Stack Developer to deliver a defined package of security and compliance-focused enhancements to our client's web platform.

This is a short-term, well-scoped contract focused on strengthening authentication, auditing, and application security within an existing production system.

The Role
You will be responsible for implementing several targeted improvements to a live ASP.NET MVC application, including:

* Adding multi-factor authentication (MFA) to user login

* Implementing step-up verification for sensitive user actions to confirm user presence at the point of authorisation

* Enhancing audit logging to capture user actions with timestamps

* Reducing security vulnerabilities by updating legacy libraries and resolving App Check warnings

* Producing clear technical documentation and handing over to the internal team

Tech Stack

* ASP.NET MVC (.NET Framework 4.8)

* C#

* JavaScript, HTML, CSS

* REST APIs

Required Experience

* Strong background in authentication and authorisation patterns

* Experience securing high-risk or regulated user actions (e.g. approvals, authorisations)

* Comfortable working independently on well-defined enhancements

* Ability to work within an existing codebase and platform constraints

* Clear documentation and handover skills

Desirable

* Experience in regulated environments

* Familiarity with step-up authentication or electronic signature workflows

* Pragmatic approach to improving security without large-scale rewrites

For more info, contact Ruben Davis at Synergy