Senior .Net Developer

Department: Technology & Data

Employment Type: Full Time

Location: United Kingdom

Description

About the team:

At Vintage Cash Cow, technology is how we scale impact. Every customer journey, from sending in pre-loved items to getting paid, is powered by the systems we design, the products we build, and the data we unlock.

Our Technology & Data team is at the heart of this transformation driving greenfield product development, experimenting with fresh ideas, and bringing innovative solutions to life. We’re building modern, scalable, and customer-focused platforms that set the standard for the re-commerce industry.

This is a team where curiosity meets craft: blending creativity, technical excellence, and a product mindset to deliver experiences that feel simple, rewarding, and future-proof.

About the role:

We’re looking for a Senior Full Stack .NET Developer to shape the next generation of Vintage Cash Cow’s platforms. This isn’t a “keep the lights on” role, it’s a chance to build fresh, modern solutions from the ground up. You’ll be designing and developing APIs and Blazor applications on .NET 9.0, driving forward greenfield projects, and helping us rethink what’s possible for our customers and teams.

With a product mindset at the core, you’ll collaborate closely with engineers, product managers, and designers to create software that doesn’t just work, but delights. If you’re the kind of developer who’s curious, coachable, and excited to leave your mark on something new—you’ll thrive here.

This role can be based in either the UK or the Netherlands.

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Getting Started...

Immerse yourself in our systems, architecture, and product portfolio.
Start building and maintaining modern web APIs with .NET 9.0.
Get hands-on with Blazor apps and contribute to user-facing experiences.
Collaborate with cross-functional teams to deliver features that matter.
Share knowledge through pair-coding, mentoring, and coaching others.

Establishing Your Impact…

Take ownership of key modules and new greenfield builds.
Partner with product managers to translate customer needs into elegant, scalable solutions.
Integrate external service APIs to extend our platform’s capabilities.
Help shape our development practices, bringing fresh ideas and modern tooling.

Driving Excellence…

Lead projects end-to-end: from idea, to design, to launch.
Champion a culture of experimentation, curiosity, and continuous learning.
Mentor junior developers and elevate the team’s technical craft.
Keep an eye on emerging tech, propose and trial new tools that could transform how we work.

Key Responsibilities

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Key Goals & Objectives:

Deliver high-quality greenfield builds using .NET 9.0, Blazor, and modern engineering practices.
Create scalable, secure, and reliable applications that support Vintage Cash Cow’s growth and customer experience.
Champion a product mindset, ensuring everything built solves real customer and business problems.
Maximise team impact by mentoring junior developers, sharing knowledge, and lifting technical standards.
Continuously improve development practices, leveraging modern tools, cloud technologies, and automation.
Stay ahead of the curve, experimenting with new technologies and suggesting innovations that could simplify complexity and unlock value.

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Key Responsibilities:

Software Development

Design, build, and maintain APIs, Blazor apps, and full-stack solutions with .NET 9.0.
Own modules end-to-end: from requirements and architecture to deployment and monitoring.
Write clean, testable, maintainable code following best practices and modern patterns.

Product & Collaboration

Work closely with product managers and designers to translate ideas into elegant technical solutions.
Bring curiosity and a problem-solving approach to ensure features deliver maximum customer value.
Collaborate with cross-functional teams across engineering, product, and operations.

Technology & Infrastructure

Contribute to the design and evolution of scalable, resilient architectures.
Integrate with third-party APIs and services where needed.
Ensure system reliability, performance, and security.
Leverage cloud platforms (Azure preferred) and CI/CD pipelines for efficient delivery.

Team Leadership & Growth

Mentor and coach junior developers, fostering a learning culture.
Contribute to code reviews, pair-programming, and technical discussions.
Advocate for best practices, new tools, and ways of working that improve productivity and quality.

Innovation & Continuous Improvement

Keep abreast of emerging technologies and frameworks, evaluating their potential fit.
Propose and lead experiments or spikes that can modernise our stack.
Help shape development standards and processes to ensure we’re always improving.

Skills, Knowledge and Expertise

Strong experience as a full-stack .NET developer, with proven delivery of high-quality software.
Deep knowledge of .NET 9.0, C#, ASP.NET Core, and Blazor.
Proficiency in building and maintaining RESTful APIs.
Solid foundation in modern web technologies (HTML, CSS, JavaScript).
Experience with SQL Server and database design.
Familiarity with microservices, Docker, and Kubernetes.
Knowledge of Agile practices, Git, CI/CD pipelines, GitHub Actions.
Exposure to Azure cloud (or eagerness to learn).
Bonus: experience with .NET Aspire.
A product mindset: curiosity, empathy for users, and a drive to solve real problems.
Natural mentor, someone who enjoys raising the bar for the whole team.

Equal Opportunities

At Vintage Cash Cow, we are committed to fostering an inclusive environment where everyone feels heard, valued, respected and empowered to bring their authentic self to work. We believe that diversity drives innovation, creativity and success.

We welcome applicants from all backgrounds, perspectives and experiences, and we strive to create equitable opportunities for all. Together, we’re building a culture that celebrates individuality and champions equity at every level of our organisation.

If you’re excited about this role, but don’t tick every box, we still encourage you to apply. Your unique skills and experiences might be just what we’re looking for now or in the future.

If you need adjustments or accommodations during the hiring process, please reach out to us and we will do our best to support you.