Senior / Lead Fullstack Developer (.NET/React)

About Gapstars Gapstars is a Netherlands-based software development services provider that builds remote, agile teams in Sri Lanka and Portugal for innovative tech companies. Today, we are home to 300+ TechStars and innovative minds, turning scalable software into performance products that shape the future. Our partners are highly ambitious tech companies that are looking to conquer their respective markets. The Role We are looking for a Senior/ Lead Full Stack Software Developer to join our client’s tech and product team. In this role, you will not only be responsible for writing clean, efficient, and scalable code but also play a vital role in mentoring team members, contributing to key architectural decisions, supporting the tech lead with hiring efforts, and collaborating with external partners and suppliers. Most importantly, you will work closely with the team to build and enhance an impactful mental health platform. Our tech stack: .NET 8, SQL Server, React, Azure Key Requirements • Proven experience as a Software Developer, with a strong track record of contributing to innovative and impactful projects. • Bachelor’s degree in Computer Science or a related field. • 5+ years of hands-on experience with .NET (C#, Entity Framework, async programming, LINQ), .NET Core and ASP.NET Core. • At least 2 years of experience working with modern front-end frameworks with React (or transferable frontend frameworks like Angular/Vue) • Solid understanding of relational databases (SQL Server / Azure SQL) • Familiarity with cloud platforms (preferably Azure, AWS acceptable) • Familiarity with DevOps practices and tools. • Strong communication skills with a passion for mentoring junior developers. • Ability to devise creative yet practical solutions to complex technical challenges. • Enthusiastic about working in the fast-paced and evolving environment of a scale-up. • Solid understanding of application architecture, software design principles, and common design patterns. • Experience with testing methodologies, including unit, integration, and end-to-end (E2E) testing "Gapstars is committed to a diverse and inclusive workplace. We are an equal opportunity employer and do not discriminate based on race, national origin, gender, disability, or age. Your personal information collected during the application process is handled following our privacy policy and used exclusively for recruitment and hiring purposes only"