Senior Full-stack Developer, EchoGlobal Tech

• Experience: 5+ years of commercial full-stack development
• Back end: C#, .NET, ASP.NET Core Web API, Entity Framework Core, PostgreSQL, REST API design and development
• Front end: TypeScript, React.js, Vite and Tailwind CSS; responsive, mobile-first interfaces; accessibility standards (WCAG)
• Security: authentication and authorization with OAuth2 / OpenID Connect and SSO
• Quality: automated unit, integration and end-to-end testing; Git and CI/CD workflows
• AI-assisted development: hands-on daily use of tools such as Claude, Codex or similar
• English: upper-intermediate or higher

Desirable

• Start: ASAP
• Duration: up to 4 months, with a possible extension for ongoing support
• Month 1, discovery phase: up to 60 hours
• Months 2 to 4, development phase: full-time, about 160 hours per month
• Working hours: Mon to Fri, with at least 4 hours of overlap with the team’s 9:00 to 17:00 EST

• HR interview
• Technical interview with the team
• If needed, a final conversation to align on the last details