Senior Full Stack (Node.js/React.js) Developer

CodeLions is a team of dedicated professionals who have a long track record of experience in building startups from idea to scale. Our primary services are IT consulting, software development, UI/UX design, quality assurance, and team extension. We’re in search of people that are motivated, treat every project as their own, and are always open to new ideas and approaches.

Requirements:

- 4+ years of commercial experience as a Full Stack or Senior Front-end/Back-end Engineer.
- Strong command of TypeScript & JavaScript
- Experience with React + Next.js (SSR, SSG, routing, performance optimization)
- Solid experience with one or more backend technologies (e.g., .NET Core, Node.js, or similar)
- Strong understanding of REST API design, backend logic, authentication/authorization flows, and integration with third-party services
- Experience building responsive UI using Tailwind CSS (Flowbite as a plus)
- Good knowledge of databases (SQL Server, PostgreSQL, or MongoDB)
- Familiarity with OWASP security principles and secure coding practices
- Experience with Git and Git-based workflows

Key Responsibilities:

-Design, develop, and maintain end-to-end application functionality across both front-end and back-end layers
-Implement scalable UI using React, TypeScript, Next.js, including reusable component libraries and shared modules
-Build and maintain backend services (RESTful APIs, business logic, authentication workflows, integrations with third-party services)
-Contribute to database design, query optimization, and data modeling (SQL or NoSQL)
-Implement reliable communication between backend services and front-end applications
-Ensure system security and data protection using industry standards and OWASP best practices
-Optimize applications for performance, scalability, accessibility, and SEO