Full Stack Developer (UK Offshore Technology) (12882) at Investec

Key Responsibilities

What you'll do

• Design, develop, and maintain secure, scalable, and high-performance REST APIs using C# and .NET Core / .NET Framework.
• Implement OAuth2 and OpenID Connect (OIDC) for secure authentication and authorization in regulated environments.
• Work closely with API gateways such as Apigee and Azure API Management (APIM) to manage, secure, and monitor external-facing APIs.
• Collaborate with product and cloud teams to ensure systems meet financial-grade security and compliance standards.
• Take ownership across the full SDLC — from design and deployment to production support and monitoring.
• Participate in a rotational standby schedule to support the stability of client-facing systems outside of normal working hours.
• Work across the stack where needed — from front-end SPAs (Angular/React) to infrastructure-as-code and CI/CD pipelines.
• Continuously drive improvement in API quality, resilience, and developer experience.

Essential experience

• Proven experience in building and supporting RESTful APIs using C# and .NET Core / .NET Framework.
• Strong grasp of API security principles including OAuth2, OIDC, token management, and data protection.
• Familiarity with Apigee, Azure API Management (APIM), or equivalent API gateway technologies.
• Experience with unit and integration testing, using frameworks that ensure coverage and maintainability.
• Front-end exposure to Angular, React, or similar SPA frameworks.
• Understanding of the Document Object Model (DOM) and modern UI development best practices.

Advantageous experience

• Hands-on experience working with Microsoft Azure infrastructure.
• Proficiency with HTML, CSS, JavaScript, and Bootstrap.
• Familiarity with Terraform, ARM, or Bicep for infrastructure provisioning.
• Experience with document store databases (e.g. MongoDB, Cosmos DB).
• Knowledge of PowerShell scripting for automation.
• Exposure to regulated financial environments or Open Banking ecosystems.
• Awareness of how to leverage AI tools responsibly (e.g., for code generation, analysis, documentation, or testing) to enhance productivity and software quality.

Why join us

• Contribute to a mission-critical Open Banking platform used by real clients every day.
• Collaborate with expert engineers and product teams across South Africa and the UK.
• Be part of a culture that values excellence, creativity, and responsibility.
• Have opportunities to influence architecture, improve developer tooling, and shape our next generation of financial APIs.
• Enjoy meaningful challenges and the satisfaction of building systems that matter.