Senior Web Application Developer ASP.NET MVC 5, C#, & React

Location: Hybrid 3/4 days p/w onsite West London

Must have right to work in the UK and located near West London

3 months contract (extension TBC)

Start ASAP (Immediate start / within 2 weeks notice)

Inside IR35 contract 425pd - (538pd rate to umbrella)

Seeking a Senior Web Application Developer (ecommerce) with Minimum 8 years of Web application development experience consisting of strong C#, ASP.NET MVC 5, and React.

Strong knowledge of Object‑Oriented Programming, SOLID principles, common design patterns and RESTful API design and integration (experience with SOAP WebServices and XML/XPath) also required.

We are looking for a strong portfolio in bespoke eCommerce and enterprise web applications.

Other desirable skills include a mix of HTML5, CSS3, JavaScript, jQuery etc.

This Snr Web Developer / C#, ASP.NET MVC 5 Developer will play a key role in the next phase of web platform modernisation.

Transitioning this international Travel/Holiday Ecommerce client’s eCommerce platform and portfolio of marketing microsites into the ASP.NET MVC 5 framework and evolving toward a cloud‑native architecture (Azure/AWS in the roadmap).

This role will play a pivotal part in designing, building, and maintaining scalable, secure web applications that deliver complex solutions smoothly and seamlessly across multiple platforms.

Working closely with stakeholders, the developer will bring technical excellence, creative problem‑solving, and a proactive approach to continuous improvement.

The successful candidate will demonstrate high standards, attention to detail, and a forward‑thinking mindset – helping shape coding best practices, modern coding standards, and supporting our long‑term journey toward a fully cloud‑ready environment.

Experience, Skills and Qualifications Required

• Minimum 8 years of digital development experience with a strong portfolio in bespoke eCommerce and enterprise web applications.
• Proven expertise on C#, ASP.NET MVC 5, SQL Server, Entity Framework, and React.
• Experience with HTML5, CSS3, JavaScript, jQuery desirable.
• Strong knowledge of Object‑Oriented Programming, SOLID principles, and common design patterns.
• Experienced in RESTful API design and integration; experience with SOAP WebServices and XML/XPath.
• Skilled in using IoC containers (Autofac, Ninject) and unit testing frameworks (NUnit, Moq, SpecFlow).
• Proficient with source control management tools and processes (Git, GitFlow, SourceTree) and dependency management using NuGet.
• Experienced with CI/CD and DevOps pipelines using GitLab, Azure DevOps, TeamCity, Cake, or Octopus.
• Working knowledge of Agile methodologies (Scrum/Kanban) and issue tracking tools such as Jira.
• Proven track record of delivering features and projects to deadlines while maintaining high standards of quality and reliability.
• Understanding of application and database performance tuning, troubleshooting, and optimisation techniques.
• Comfortable working in small, collaborative teams and taking initiative in managing development tools, environments, and build processes.
• Familiarity with enterprise CMS platforms (e.g., SDL Tridion).
• Proactive in staying current with emerging technologies, frameworks, and development practices.
• Degree or equivalent qualification in Computer Science or a related technical field.

Areas of Responsibility

• Develop and maintain complex web solutions using ASP.NET MVC 5, C#, and React.
• Support the migration to new technologies, ensuring clean architecture, scalable design, and efficient implementation.
• Deliver secure, maintainable, scalable, and fault‑tolerant code following SOLID principles, OO design patterns, and industry best practices.
• Contribute to front‑end development using HTML5, CSS3, JavaScript, and modern React components.
• Participate in architectural discussions and propose improvements that enhance system performance, scalability, and maintainability.
• Collaborate with Digital Product, Technology, and Marketing teams to define, estimate, and deliver features within sprint timelines.
• Participate in code reviews, mentoring team members and ensuring consistency, maintainability, and adherence to standards.
• Advise and guide mid‑level and junior developers on technical approaches, best practices, and design decisions.
• Work independently and proactively manage source control, branching, and deployments using GitLab or Azure pipelines.
• Log and troubleshoot errors across development, staging, and production environments to maintain system stability and reliability.
• Integrate and maintain third‑party services and APIs, ensuring robust and seamless connectivity with external systems.
• Ensure smooth and stable release cycles across multiple websites and environments.
• Proactively research and explore new technologies, frameworks, and techniques to continuously improve platform quality and team capability.
• Deliver high‑quality, secure, and scalable code aligned with architectural standards and sprint goals.
• Take ownership of assigned features, ensuring timely, smooth, and seamless delivery.
• Maintain platform reliability by proactively identifying, logging, and resolving issues across environments.

Areas of Accountability

• Deliver high‑quality, secure, and scalable code aligned with architectural standards and sprint goals.
• Take ownership of assigned features, ensuring timely, smooth, and seamless delivery.
• Maintain platform reliability by proactively identifying, logging, and resolving issues across environments.

Directorates Application Development Manager and are accountable to multiple stakeholders across Sales & Marketing.

At PCR Digital, we are committed to ensuring that diversity, equity and inclusion play a role at all stages of our recruitment - it is important to us that our own company culture and the culture of our network is as varied and supportive as possible.

We love people (it's why we do what we do), so, regardless of background, we welcome you to work with us or apply to any of our jobs if you feel that they are right for you.

We also aim to ensure that our entire process is accessible. Please make us aware of any adjustments you may need throughout the selection, interview and general process and we will do all we can to ensure that any barriers are removed for you.