Full Stack Developer focused on designing and building reliable, scalable and maintainable software.

I work across backend and frontend development, with a strong interest in software architecture, system design, application security and building solutions that solve real business problems.

Backend

Java · Spring Boot · C# · .NET · ASP.NET Core

Frontend

Angular · React · Next.js · TypeScript

Databases

PostgreSQL · SQL Server · MySQL

Engineering

REST APIs · Software Architecture · Clean Code · SOLID · Authentication · Authorization · Automated Testing · Docker · Git

I believe software should be designed for more than simply working today.

My focus is on building systems that are:

• Reliable and predictable
• Secure by design
• Easy to maintain and evolve
• Scalable when requirements grow
• Structured around clear business rules and responsibilities

I value clear architecture, well-defined boundaries, automated testing and thoughtful engineering decisions.

I am continuously developing my knowledge in:

• Backend Architecture
• Distributed Systems
• Cloud Infrastructure
• Application Security
• System Design
• Artificial Intelligence

GitHub github.com/danielsismer

LinkedIn Daniel Vinicius Rios Sismer