Senior Software Engineer | AI Engineer | GenAI, LLMs & RAG | Full-Stack & Data Engineering | Software Architect
I'm a Software Engineer with 10+ years of experience architecting and delivering scalable, high-impact solutions. My passion lies in bridging the gap between complex business needs and robust technical implementations.
My expertise is centered on designing and building multi-tenant SaaS platforms, leading full-stack development, and integrating AI solutions to solve real-world problems. I thrive in environments where I can wear multiple hats, from defining system architecture and mentoring teams to hands-on coding and optimizing performance.
What I bring to the table:
- Technical Leadership: I don't just write code; I lead projects from conception to deployment, ensuring alignment with business objectives.
- Full-Stack Mastery: Experienced across the entire stack, from modern frontend frameworks (Next.js, React, Angular) to high-performance backends (Node.js, Python/FastAPI, NestJS) and mobile development (Ionic, React Native, Flutter).
- AI Integration: I leverage the power of AI, with hands-on experience in RAG architectures, Prompt Engineering, and building conversational agents using LLMs and vector databases (Qdrant, pgvector) on platforms like Google Cloud Vertex AI.
- Scalable Systems: I specialize in creating systems that can grow, using microservices, cloud infrastructure, and optimizing databases (PostgreSQL, MongoDB).
- Business-Oriented: My goal is always to deliver solutions that provide tangible value, using tools like Stripe/PayPal, complex data processing (ETL), and custom analytics dashboards.
Here are some of the key technologies I work with:
Frontend & Mobile
- Frameworks/Libraries: React, Next.js, Angular, Ionic, React Native, Flutter.
- Languages: TypeScript, JavaScript, Dart, Kotlin.
Backend & Architecture
- Languages: Node.js, Python.
- Frameworks: Express.js, NestJS, FastAPI, Django.
- Architectures: REST APIs, Microservices, Clean Architecture, Multi-Tenant SaaS.
AI & Data
- LLMs & Orchestration: OpenAI, Mistral, LangChain, Prompt Engineering.
- Vector Databases: Qdrant, pgvector.
- Data Engineering: ETL Processes, Real-time Data Ingestion, Big Data Platforms.
- Cloud & Viz: Google Cloud Vertex AI, Custom Dashboards.
Databases
- Relational: MySQL, PostgreSQL.
- NoSQL: MongoDB.
- Auth/Backend-as-a-Service: Supabase (Auth, RLS, PostgreSQL).
Tools & Practices
- DevOps: Docker, Vercel, CI/CD Pipelines.
- Methodologies: Agile (Scrum), Technical Leadership, Mentoring.
- Productivity: Actively use AI tools like GitHub Copilot & Cursor to optimize workflows.
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Full Stack Developer @ Juztina (US)
- Built a multi-tenant legal platform using Next.js 15, React 19, and Python/FastAPI.
- Integrated AI for legal RAG using Mistral/OpenAI, LangChain, and Qdrant.
- Implemented payments with Stripe and a CMS using Directus.
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Mobile Developer @ Fogata Group (Panama)
- Developed the MVP for the Panamanian Ministry of Tourism using Angular/Ionic.
- Focused on modular architecture and performance to enhance user experience.
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Frontend / Mobile Developer @ Nrby (US)
- Developed and maintained web and mobile apps (React, Ionic) for a US-based company.
- Integrated Google Maps, Leaflet, and Firebase for push notifications.
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Software Engineer @ Panda ID Solutions (Venezuela)
- Provided technical leadership for end-to-end projects, defining architecture, and mentoring junior developers.
- Worked across the full stack, including Node.js, Angular, React, and mobile development with Flutter and Kotlin.
A note on my work: I am a builder. I believe in clean code, robust architecture, and continuous improvement. I'm accustomed to integrating AI tools into my daily workflow to enhance productivity and solve complex problems efficiently.
I'm always open to interesting conversations, collaboration, or new opportunities.
- LinkedIn: https://linkedin.com/in/hfernandezdev
- GitHub: https://github.com/hfernandezdev
- Email: humbertof44@gmail.com
- Linktree: https://linktr.ee/hfernandezdev
- Website: https://humberto-fernandez-personal-brand.vercel.app
"I am focused on delivering robust, scalable solutions aligned with business objectives."
