Software Engineer · AI Master's Student

Neill Giraldo

I am a Full Stack Engineer with over six years of professional experience working with commercial products in the fields of cybersecurity and HR tech/recruiting. My core expertise lies in Python, PostgreSQL, TypeScript, Node.js, React, and AWS. With a high level of ownership and high-quality standards, I have contributed to several web applications and software systems in tasks that range from feature development to strong architectural decisions to reduce technical debt to the minimum. Scalability is at the core of my concerns when developing new software, and solving technical challenges is my main motivation to bring high-quality software to production. I can work independently and deliver results from a remote setting or onsite. By integrating AI-assistant tools such as Claude Code, I've significantly accelerated my workflow and boosted my overall productivity. I am always interested in contributing to the success of both long-lived and brand-new products.

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About

I am a Fullstack Software Engineer with over six years of professional experience building scalable systems and user-friendly web applications. My core expertise lies in Python (FastAPI, Flask), TypeScript, React.js, and Node.js, with a proven track record of optimizing application performance and cloud architecture in production environments. Driven by a passion for emerging technologies and intelligent systems, I am currently pursuing an M.Sc. in Artificial Intelligence.

Showcase

Live sites I've built and shipped.

Flights

Finds affordable flights from a local airport within a set budget and date range.

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Work Experience

Full Stack Developer
Oct 2022 – Nov 2024
JobNinja — Munich, Germany
- Tech stack: Next.js (React.js + TypeScript), Python (Flask), PostgreSQL, AWS, Heroku.
- Architected and developed a brand-new frontend application for the core company website.
- Improved and maintained core Python (Flask) backend systems for performance and scalability.
- Optimised Core Web Vitals and refactored code to significantly boost SEO performance.
Full Stack Developer
Apr 2021 – May 2022
NortonLifeLock (Avira) — Tettnang, Germany
- Tech stack: React.js, TypeScript, Node.js, AWS (CloudFormation, Lambda Functions, IAM).
- Delivered high-quality cloud features consistently in a 100% remote global team, with high autonomy.
- Designed and built scalable AWS cloud solutions using IaC, ensuring robust and repeatable deployments.
- Automated end-to-end deployment workflows by developing and maintaining efficient CI/CD pipelines.
Full Stack Engineer
Nov 2018 – Mar 2021
Avira — Tettnang, Germany
- Tech stack: React.js, TypeScript, Node.js, AWS.
- Expanded full-stack capabilities for Avira Password Manager, ensuring a secure cross-platform user experience.
- Developed an AWS AppSync data synchronization module for offline and real-time functionality.
- Built event-driven, serverless cloud services using AWS Lambda, DynamoDB, and CloudFormation.
Software Developer
Jun 2018 – Oct 2018
Olimpia IT — Bogotá, Colombia
- Tech stack: .NET Framework, AngularJS.
- Maintained and improved a PIN generation system used by 10M+ customers.
- Enhanced the Secure File Transfer System UI for better user experience.
- Supported and developed new features for the HR system.
Systems Analyst (Innovation)
Jan 2018 – May 2018
Asesoftware — Bogotá, Colombia
- Tech stack: Java Enterprise, PrimeFaces.
- Developed a real-time monitoring prototype for a top-tier bank.
- Integrated large-scale log processing and automated alerting systems.
- Built interactive dashboards using Java Enterprise, PrimeFaces, PostgreSQL.
Software Engineering Intern
Jun 2016 – Dec 2016
Avira — Tettnang, Germany
- Tech stack: Python, Flask, SQLAlchemy, AngularJS.
- Automated localization & licensing processes using Python, Flask, SQLAlchemy.
- Developed a REST API with a modular Blueprints structure.
- Created a Proof of Concept for an AI chatbot using Python, NLTK.

Education

M.Sc. Artificial Intelligence

2025 – Present

Universidad de los Andes (Online) — Munich, Germany

Theory: Advanced study of supervised, unsupervised, deep, and reinforcement learning methodologies.
ML Pipelines: Built, tested, and validated end-to-end data pipelines and model workflows using Python, Scikit-learn, Keras, and TensorFlow.
Architectures & Systems: Applied traditional algorithms alongside developing advanced Transformer-based models and reinforcement learning agents utilizing Hugging Face and PyTorch.

B.Sc. Systems & Computing Engineering

2011 – 2018

Universidad Nacional de Colombia — Bogotá, Colombia

Computer Science Foundations
Software Engineering / Architecture
Project Management
Engineering Background

Exchange Program in Computer Science

2015 – 2016

Technische Universität Darmstadt — Germany

Exchange year within the Computer Science program.
Coursework: Machine Learning, Natural Language Processing, Software Testing.

Projects

Affordable Flights from Germany

Problem: Wanted a faster way to discover affordable travel destinations within a given date range, instead of manually checking flight prices one by one.

My role: Independent developer — designed and built the full stack, from the real-time backend API to deployment automation.

Next.js · Tailwind CSS · FastAPI (Python) · GitHub Actions · Vercel · Ryanair API

Outcome: Built a real-time FastAPI backend that aggregates fare data to optimize travel search; automated continuous deployment via GitHub Actions to Vercel, and applied SEO strategies and analytics tracking to significantly boost platform visibility.

Live Demo

Skills

Languages

Python
TypeScript
JavaScript
Java

Frameworks & Libraries

React.js
Next.js
Node.js
Flask
FastAPI
AngularJS

Machine Learning

TensorFlow
PyTorch
Hugging Face Transformers
Scikit-learn
Keras

Cloud, Tools & DevOps

AWS (Lambda, CloudFormation, DynamoDB, IAM, AppSync)
PostgreSQL
Heroku
Vercel
GitHub Actions
Git

Contact

Open to new opportunities — the fastest way to reach me is email.

contact@neillgiraldo.com