Hi, I'mDiogo Santos
I'm a Software Engineer with expertise on SaaS development, modern web technologies, and large-scale enterprise architecture.
About Me
I'm a passionate software engineer with 5+ years of experience building scalable SaaS platforms and large-scale enterprise projects, delivering high-performance backends with Node.js, Java and AWS cloud databases, alongside responsive cross-device compatible React frontends.
I leverage AI tools like Cursor, Claude, and CodeRabbit to ship faster without cutting corners - and I stay close to the latest industry trends.
When I'm not working, you can likely find me reading about finance and investments, tennis and gym, or playing video games.
Work Experience
Lead Software Developer
Hospitality App Turnaround • Joined at a critical stage with an unstable, unreliable hospitality application • Transformed it into a stable, production-ready system within the first 4 months • Intensive hands-on development and architectural refactoring
Technical Ownership • Led technical delivery while remaining deeply involved in implementation • Owned architecture, technology decisions, and day-to-day development • Stack across AWS, TypeScript, Node.js, and React
Engineering Standards • Raised standards through code reviews, refactoring, and best practices • Significantly improved code quality and team effectiveness • Stack: AWS, React.js, Node.js, Next.js, TypeScript, Docker, MongoDB, PostgreSQL, GitHub, Vue 3
Software Developer (Contractor, Part-time)
Platform Support • Continued supporting the Ed-Tech platform with targeted back-end and front-end work • Focused on stability, maintainability, SSO integrations, and critical improvements
High-impact Delivery • Stepped in for complex or high-impact tasks when needed • Leveraged deep system knowledge to deliver reliable solutions efficiently • Stack: React.js, Node.js, Next.js, TypeScript, AWS, Docker, Jest & Cypress, PostgreSQL, GitHub
Software Developer
Core developer for DeepSkill's SaaS Ed-Tech platform • Designed and implemented high-performance backend services for the WebApp • Leveraged optimized data structures, security, and streamlined code • Reduced processing time by 30% • Achieved 99.9% application uptime
Spearheaded end-to-end development • Collaborated with product managers • Delivered 10+ key OKRs from concept to production • Met all business objectives
Frontend Development Excellence • Developed 100+ responsive frontend components from Figma designs • Used React, Next.js, and TypeScript • Ensured cross-device compatibility
CI/CD and Testing Improvements • Integrated GitHub CI/CD pipelines with automated tests on every PR and release • Set up custom Cypress and Jest testing environments • Reduced reported bugs by 80%
AI Integration and Leadership • Led AI-driven feature development • Integrated custom models and OpenAI API • Launched 5 innovative Web App functionalities • Increased user retention by 20% • Mentored 3 interns, boosting team productivity and code quality
Junior Software Developer
Junior developer of DeepSkill's SaaS Ed-Tech platform • Developed and maintained back-end services for efficient data retrieval and storage • Assisted in establishing core back-end infrastructure • Enhanced application scalability and reliability
Frontend Development • Built and enhanced user interfaces delivering responsive, user-friendly designs • React, Next.js, TypeScript, and modern CSS tooling
System Integration • Integrated external calendar systems • Implemented online conference embeds • Customized and maintained Strapi services (Node.js CMS) • Ensured seamless third-party integrations
Bachelor of Informatics Engineering
Core Computer Science • Mastered Object-Oriented Programming principles • Studied fundamental data structures and algorithms • Learned software development lifecycle and best practices
Programming Languages & Technologies • Java - Primary programming language • C - System programming and memory management • SQL - Database design and management • Web Technologies - HTML, CSS, JavaScript basics
Software Engineering Fundamentals • Software architecture and design patterns • Version control systems and collaborative development • Testing methodologies and debugging practices • Problem-solving and analytical thinking
My Skills
Frontend Development
Backend Development
Database Technologies
DevOps & Tools
AI Tools
Personal Projects
E-commerce Frontend
The frontend for my full-stack e-commerce platform built with Next.js, Typescript and React. I use this project as a template every time I need to create a new E-Commerce project for my clients.
E-commerce Backend
The backend for my full-stack e-commerce platform built with Strapi.js, Node.js and Stripe. I use this project as a template every time I need to create a new E-Commerce project for my clients.
Lineage 2 - Game Files
Lineage 2 is a MMORPG game that I've been playing since I'm a kid. I've always wanted to create my own private server, so I decided to do it. I created new features and improvements simultaneously improving my Java skills too.
Telegram Automated Messaging
During the 2021 Crypto boom, the many memecoin founders needed a way to share their memecoin in dozens of telegram groups. I built a telegram bot that would send automated messages to a group of telegram users. I used python and bash to automate this process.
Responsive Landing Page
I've created a responsive landing page for my tile business. I used React, Typescript and Next.js to create this project where I can showcase my tiles and services. It has multiple languages using Next-Intl and it's deployed on Vercel.
AI Insight Dashboard Prototype
The AI Insight Dashboard is a prototype of a dashboard that would help users get insights from their data. Together with AI, we would be able to create a dashboard that would help users get insights by integrating their apps or documents into one place.