We are seeking a highly skilled and experienced Senior Full-Stack Developer with expertise across Next.js (React), ASP.NET Core, Entity Framework, MongoDB, Vercel, and AWS, along with hands-on experience using AI coding tools such as Claude Code or Codex to design and build products and prototypes. This is an exciting opportunity to join a dynamic team and help build cutting-edge applications across a range of industries.
Responsibilities
- Design and develop robust, scalable full-stack solutions for web and mobile applications.
- Interface with product stakeholders and clients to gather requirements and translate them into technical specifications and prototypes.
- Contribute to development planning — breaking work into epics and tasks and helping organize sprints within a multi-developer team.
- Mentor other developers, review their code, and collaborate on planning and technical decisions.
- Build efficient, secure server-side architectures on serverless cloud platforms such as AWS Lambda, Vercel, and Atlas App Services.




- Optimize database performance through effective data modeling and querying across both SQL and NoSQL systems.
- Deploy and manage applications on AWS infrastructure, leveraging services such as Lambda, S3, Secrets Manager, VPC Peering, EventBridge, and EC2.
- Stay current with emerging technologies and industry trends, sharing knowledge and insights with the team.

Requirements
- Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent experience).
- Proven experience as a full-stack software developer implementing complex web and mobile systems, including collaborating with and mentoring other team members.
- Solid back-end experience with Node.js and C# / .NET (ASP.NET Core), including building RESTful APIs and serverless functions.
- Experience with ORMs and data access, including Entity Framework.
- Hands-on experience with cloud services, specifically AWS, MongoDB Atlas App Services, and Next.js on Ver

📌 Senior Full Stack Software Developer (Colombia)
🏢 Modern.tech
📍 Colombia