Full Stack Developer

Mid-Level Full Stack Developer – TypeScript / Next.jsABOUT THE ROLEUnknwnAI is looking for a Mid-Level Full Stack Developer to join our engineering team.Our products are built primarily using TypeScript and Next.js, and we are looking for someone with genuine commercial experience building, maintaining and debugging production applications using this stack.This is a hands-on engineering role. You will work across frontend development, backend services, APIs, databases, integrations and cloud-hosted applications.We are a small technical team, so we need someone who can take ownership of problems, investigate issues independently and deliver production-ready solutions without requiring constant supervision.RESPONSIBILITIES

• Develop and maintain full-stack applications using TypeScript and Next.js
• Build backend APIs and services
• Develop responsive, production-quality frontend interfaces
• Design and work with PostgreSQL databases
• Write and optimise SQL queries
• Build integrations with third-party systems and APIs
• Implement authentication, permissions and role-based access
• Debug production issues across frontend, backend and database layers
• Work with AWS-hosted infrastructure and services
• Participate in code reviews and Git-based development workflows
• Take features from requirement through development, testing and deployment
• Work with and improve existing production codebasesESSENTIAL REQUIREMENTSWe are looking for approximately 4–5 years of professional software development experience, with strong commercial experience in:
• TypeScript
• Next.js
• React
• Node.js
• REST APIs
• PostgreSQL
• SQL
• Git / GitHub
• Modern frontend development
• Backend application development
• Third-party API integrationsYou should be comfortable understanding an unfamiliar codebase and troubleshooting problems across multiple layers of an application.WHAT WE ARE LOOKING FORYou should:
• Be genuinely full-stack rather than frontend-only
• Be able to investigate and solve technical problems independently
• Understand how production applications work beyond simply writing features
• Write clean, maintainable code
• Be confident working with databases and APIs
• Take ownership of assigned work
• Communicate clearly when something is blocked
• Be able to explain technical decisions and trade-offs
• Be comfortable working in a small, fast-moving engineering teamThis is not a junior position. We are looking for candidates with genuine commercial development experience rather than primarily tutorial, training or basic CRUD-project experience.DESIRABLE EXPERIENCEExperience in any of the following would be advantageous:
• ERP or business management software
• Healthcare or health-tech platforms
• AWS
• SaaS platforms
• Complex third-party integrations
• CI/CD pipelines
• Application security and data protection
• Legacy systems or established production codebasesWORKING AT UNKNWNAIUnknwnAI Ltd is a UK-based software company with a fully remote international team.This role is remote from India. You must be available during our standard company working hours of 9:00 AM–5:00 PM UK time.You will need a reliable internet connection, a professional remote-working environment, and good written and spoken English.Please apply only if your salary expectations are within this range.If you have strong commercial experience with TypeScript and Next.js, enjoy solving real engineering problems and are comfortable taking ownership of production software, we would like to hear from you.