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Application Engineering

Senior .NET Full Stack Engineer

Engineer modern web applications, APIs and integration services using Microsoft technologies and contemporary front-end frameworks.

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LocationLondon, UK

Working styleHybrid / client-aligned

Employment typeFull-time

Experience5–10 years

Technology environment

C#.NET 8ASP.NET CoreREST APIsReactAngularTypeScriptSQL ServerAzure

Industry context

Banking & FinanceEducationProfessional Services

Job description

The Senior .NET Full Stack Engineer will design and deliver secure, maintainable web applications and APIs across client and internal technology programmes.

The role requires depth in backend engineering plus practical front-end capability, integration design, testing and production-readiness.

Key responsibilities

Design and implement ASP.NET Core services, APIs and application components.
Develop accessible, responsive front-end features using React or Angular and TypeScript.
Design data access, validation, error handling, authentication and integration boundaries.
Contribute to architecture reviews, code reviews, automated testing and CI/CD pipelines.
Diagnose production issues and improve observability, resilience and maintainability.

Qualifications

5–10 years of professional software-development experience with strong C#/.NET capability.
Hands-on experience with ASP.NET Core, REST APIs and relational databases.
Professional experience with React or Angular and TypeScript.
Understanding of secure development, automated testing, source control and CI/CD.
Ability to work across architecture, engineering, QA and delivery stakeholders.

Preferred qualifications

Azure application, identity, messaging or container-platform experience.
Experience with microservices, Docker, Kubernetes or event-driven integration.
Experience delivering applications in regulated or enterprise environments.

Benefits & employment terms

Compensation, leave, pension and any role-specific benefits are confirmed during the recruitment process and stated in the written offer.
Any client-site, travel, security-screening or right-to-work requirements are confirmed before appointment.

Nature of working style

Engineers work in cross-functional delivery teams with shared ownership for quality and production readiness.
The role may involve client workshops, architecture discussions, implementation, code review and production-support collaboration.

Location

London-based with hybrid working. Client-site attendance may be required for selected engagements.

Working at RC

Delivery standards shape the employee experience

Technology roles are organised around accountable delivery, professional engineering practices and clear client or project outcomes.

Client-impact work

Roles are connected to defined business or delivery outcomes rather than artificial internal assignments.

Professional craft

Engineering, consulting and delivery decisions are expected to be explainable, maintainable and grounded in the operating context.

Clear ownership

Responsibilities, interfaces, quality expectations and escalation paths should be visible across teams and engagements.

Continuous learning

Capability grows through real delivery, peer review, feedback and exposure to changing technologies and business environments.

Hiring journey

A structured process from application to decision

The exact interview sequence may vary by role, but candidates should understand the purpose of each stage and the position they are being assessed for.

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Decision

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