Full-Stack Web Developer

ETAP empowers customers to make informed decisions throughout the life cycle of their projects with innovative software solutions for electrical systems. By applying ETAP solutions, customers experience continuous intelligence during design and engineering and into operations and maintenance using a unified electrical digital twin platform. ETAP supports customers in their digital transformation and sustainable energy transitions for a green and smart future, helping them to prioritize safety, maximize reliability, and stay resilient.

Our employees' passion for excellence, innovation, and customer satisfaction is our most-prized resource. If you share that passion — and want to be part of a company that leads the energy transition towards a cleaner and more resilient world for future generations — we invite you to join us

ETAP is committed to creating a diverse work environment and is proud to be an Equal Opportunity Employer.

Job Title: Full-Stack Web Developer

Location: On-site

Employment Type: Full-time

The job
We're looking for a Full-Stack Web Developer with 3+ years of experience to help us design, build, and maintain modern applications across web, cloud, and database systems. You'll work with a broad stack spanning TypeScript, C#, , Blazor, SvelteKit, , and .NET Core. The role requires deep knowledge of web performance, security, PWAs, and cloud deployment in Azure, as well as hands-on experience with SQL Server and PostgreSQL databases. You'll be part of a collaborative team delivering secure, scalable, and accessible applications.

Key responsibilities

• Build and maintain full-stack applications using TypeScript, C#, /.NET Core, and modern frameworks.

• Develop responsive front-ends with , Blazor, and SvelteKit, using TanStack Query for state/data and RHF + Zod for forms and schema validation.

• Design, implement, and optimize REST and GraphQL APIs, including HTTP caching and headers.

• Apply OWASP, CSP, OAuth/OIDC, cookies/sessions, and CORS to ensure secure applications.

• Deliver progressive web apps (PWAs) with service workers, offline capability, push/background sync, and manifests, while optimizing for Core Web Vitals and WCAG.

• Work with Azure cloud services, SQL Server, and PostgreSQL to deploy, scale, and maintain applications.

Essential requirements

• 3+ years of professional experience as a web developer.

• Proficiency in TypeScript, C#, HTML5, CSS3, and basic Python scripting.

• Frontend expertise: , .NET Blazor, SvelteKit, TanStack Query, RHF + Zod.

• Backend expertise: (Bun/Deno) and .NET Core.

• API development with REST and GraphQL, plus knowledge of HTTP caching/headers.

• Strong background in Azure cloud services and databases (SQL Server and PostgreSQL).

• Familiarity with OWASP, CSP, OAuth/OIDC, cookies/sessions, and CORS.

• Experience building PWAs with service workers, offline mode, push sync, and manifests.

Desired skills and competencies

• Performance and accessibility focus with Core Web Vitals and WCAG.

• Proficiency with tooling: Vite, pnpm, ESLint, Prettier, Storybook, Browser DevTools, Docker, Git.

• Experience with testing frameworks: xUnit, MSTest, Vitest, Jest, Playwright.

• Curiosity to explore new frameworks and technologies, with an aspiration to deliver impactful solutions.

• Collaborative, team-first approach that builds trust and ensures reliable delivery.

ETAP requires all successful applicants to undergo and pass a comprehensive background check before they start employment. Background checks will be conducted in accordance with local laws and may, subject to those laws, include proof of educational attainment, employment history verification, proof of work authorization, criminal records, identity verification, credit check. Certain positions dealing with sensitive and/or third party personal data may involve additional background check criteria.

ETAP is an Equal Opportunity Employer. We are committed to being an exemplary employer with an inclusive culture, developing a workplace environment where all our employees are treated with dignity and respect. We value diversity and the expertise that people from different backgrounds bring to our business.

Come and join ETAP to create the transformative technology that enables our customers to engineer a better world.