Senior Engineer

Job Type: Permanent – Hybrid Mode of work: 2 Days to office

Location: Edingburgh, United Kingdom

Number of hours: 40 hours per week – full time

Ready to utilize your experience and expertise in Senior API Engineer?

We have an exciting role for you - Senior API Engineer!

Careers at TCS: It means more

TCS is a purpose-led transformation company, built on belief. We do not just help businesses to transform through technology. We support them in making a meaningful difference to the people and communities they serve - our clients include some of the biggest brands in the UK and worldwide. For you, it means more to make an impact that matters, through challenging projects which demand ambitious innovation and thought leadership.

• Be part of an exciting team where you will be challenged every day.
• Work closely with the range of teams within the business to bring products to life.
• Work with customers and identify opportunities to support their strategy and improve their processes across functions.

The Role

As a Senior API Engineer, you will translate strategic direction and business requirements into robust, secure and reusable API solutions. You will design, build and support enterprise-grade integrations using Azure and modern .NET technologies, delivering production-ready outcomes with minimal day-to-day oversight. The role offers the opportunity to influence API engineering standards, cloud integration patterns and modern software delivery across a complex digital environment.

Your responsibilities

• Design, build and support enterprise-grade REST APIs and reusable integration services.
• Own API solutions from requirements and technical design through implementation, testing, release and production support.
• Configure and manage Azure API Management policies for security, routing, transformations and API lifecycle management.
• Develop services using C#/.NET, Entity Framework and Azure Functions, applying appropriate serverless and integration patterns.
• Implement secure API access using OAuth2, OpenID Connect, JWT and modern API security practices.
• Build and improve CI/CD pipelines, automated tests, Git-based delivery workflows and Infrastructure as Code, preferably using Terraform.
• Collaborate with architects, engineers and stakeholders to translate strategic direction into robust technical outcomes.
• Monitor, troubleshoot and strengthen the resilience and operational readiness of production services.

Your Profile

Essential skills/knowledge/experience:

• Relevant experience in software engineering experience, with strong hands-on expertise in C# and .NET on Azure.
• Strong experience designing, building and supporting enterprise-grade REST APIs.
• Hands-on experience with Azure API Management, including policies, security, routing, transformations and API lifecycle management.
• Strong experience with Entity Framework and Azure Functions in serverless solution delivery.
• Practical knowledge of OAuth2, OpenID Connect, JWT and modern API security patterns.
• Experience with CI/CD pipelines, Git, automated testing and Infrastructure as Code, with Terraform preferred.
• Ability to take strategic direction, translate requirements into robust technical solutions and deliver with minimal oversight.
• Experience integrating third-party platforms, SaaS solutions and enterprise back-end systems.
• Experience with event-driven architectures, messaging patterns and asynchronous integrations.
• Experience with operational data stores, canonical data models and entity-based API frameworks.
• Experience exposing business capabilities through reusable and consistent API contracts.
• Experience with relational database design and T-SQL.
• Experience with gRPC and service-to-service integration patterns.
• Exposure to financial services or another regulated environment.
• Experience supporting production services, including monitoring, troubleshooting and operational resilience.