Hollyn Derisse logo
Hollyn Derisse

AI SYSTEMS ENGINEER

I build AI systems
and scalable products.

>

Try examples

> Show me your projects

Here are some of the things I've built.

AI products, SaaS systems, and developer tools shaped around real workflows, shipping pressure, and long-term maintainability.

Talent preview
012025 - 2026

Talent

AI-powered talent assessment platform for modern recruiting workflows.

Built AI-powered talent assessment platform with resume parsing, interview flows, and video processing. Developed admin tools and automated candidate screening workflows.

  • TypeScript
  • NestJS
  • Next.js
  • PostgreSQL
  • Prisma
  • Redis
  • RabbitMQ
  • OpenAI
Resume Screener preview
022025 - 2026

Resume Screener

AI resume screening and recruiter workflow system.

Developed AI resume screening system with PDF parsing and job-candidate matching. Implemented talent search, ranking, and recruiter workflow tools.

  • TypeScript
  • NestJS
  • OpenAI
  • PostgreSQL
CERVR preview
032025 - 2026

CERVR

Field-service management system for scheduling, billing, and coordination.

Built field-service management system with billing, scheduling, and real-time coordination. Integrated Twilio, DocuSign, and Google Maps APIs.

  • TypeScript
  • NestJS
  • Next.js
  • React Native
Daily Wins Tracker preview
042025

Daily Wins Tracker

Gamified app to celebrate daily wins and build positive habits.

Daily Wins Tracker is a mobile app that helps users log and celebrate their small wins each day. Wins appear as medals on a trophy shelf, with streak tracking and motivational stats. Built with Appwrite as backend and Flutter for cross-platform development, it demonstrates animations, cloud integration, and a clean user experience.

  • Dart
  • Flutter
  • Appwrite
  • Lottie
  • Docker
Skill Ready preview
052025

Skill Ready

Interactive skill-building platform for job readiness.

Skill Ready is an interactive platform that helps users become ready for job roles by breaking down skills into structured lessons and exercises.

  • TypeScript
  • React
  • Remix
  • TailwindCSS
  • Prisma
  • PostgreSQL
  • Docker
  • Radix UI
IELTS Smart Writing Trainer preview
062025

IELTS Smart Writing Trainer

AI-powered IELTS writing trainer that generates personalized grammar exercises based on the user's level, accuracy, and learning goals.

Adaptive IELTS writing trainer that uses AI to generate grammar-focused fill-in-the-blank exercises. It tailors difficulty based on user level, accuracy, and goals, helping learners master academic writing with personalized, topic-based practice.

  • TypeScript
  • NodeJS
  • NestJS
  • ReactJS
  • PostgreSQL
  • Docker
  • LLM
MyTalentX preview
072022 - 2023

MyTalentX

Talent dashboard for PETRONAS to improve job-role matching.

Developed a backend system to support PETRONAS' internal job fitment process. Enabled faster talent replacement with a 20% efficiency improvement using data analytics and a fitment algorithm.

  • TypeScript
  • NodeJS
  • ExpressJS
  • ReactJS
  • SQL Server
  • Azure DevOps
  • SonarQube
PlantTrees preview
082021

PlantTrees

Eco search engine that plants trees for every query.

Implemented an environmentally focused web search platform that incentivizes users to make eco-conscious choices by planting trees for every search performed.

  • Angular
  • Git
  • Firebase
TenereTeam preview
092020 - 2021

TenereTeam

Web app to help users find savings and shop sustainably.

Contributed to building a platform that assists users in saving money while encouraging sustainable shopping. Worked on backend and web integrations for user profiles and search tools.

  • PHP
  • Laravel
  • JQuery
  • Git
  • NodeJS
  • PostgreSQL
Demo Power preview
102019 - 2020

Demo Power

Promoter management system upgrade.

Upgraded and maintained a system to manage field promoters and product marketing activities. Improved backend reliability and data tracking for deployment management.

  • PHP
  • Symfony
  • Git
  • PostgreSQL
WAWA preview
112019

WAWA

Live arcade gaming platform.

Developed a platform where users can remotely control claw machines and arcade games via live video stream. Supported mobile integration and real-time feedback.

  • NodeJS
  • Laravel
  • Swift
  • PostgreSQL
  • Git
Inassa preview
122017

Inassa

Insurance usage tracking platform.

Developed a system for insurance providers to monitor policy usage and user activity, integrating mobile and web interfaces for customer access and reporting.

  • PHP
  • CakePHP
  • MySQL
  • Git
  • HTML
  • CSS
  • JQuery

> Tell me about your experience

Here's my professional journey.

From full-stack product delivery to backend architecture, the throughline has been building systems that solve real business problems and stay reliable after launch.

Fastrak AI logo
Fastrak AI
Senior Full Stack Engineer / Tech Architect
January 2025 - April 2026
Remote
  • Architected event-driven systems using RabbitMQ, NestJS, and PostgreSQL for AI-powered recruitment platforms.
  • Designed scalable microservice communication patterns with snapshot APIs, projections, and outbox events.
  • Led backend reliability improvements by solving concurrency, synchronization, and distributed system challenges.
Project

Talent

Built AI-powered talent assessment platform with resume parsing, interview flows, and video processing. Developed admin tools and automated candidate screening workflows.

  • TypeScript
  • NestJS
  • Next.js
  • PostgreSQL
  • Prisma
  • Redis
  • RabbitMQ
  • OpenAI
Project

Resume Screener

Developed AI resume screening system with PDF parsing and job-candidate matching. Implemented talent search, ranking, and recruiter workflow tools.

  • TypeScript
  • NestJS
  • OpenAI
  • PostgreSQL
Project

CERVR

Built field-service management system with billing, scheduling, and real-time coordination. Integrated Twilio, DocuSign, and Google Maps APIs.

  • TypeScript
  • NestJS
  • Next.js
  • React Native
FPT Software logo
FPT Software
Senior Software Engineer
June 2022 - November 2024
Vietnam
  • Led a team of 5 members implementing Agile methodologies and ensuring customer satisfaction.
  • Architected scalable backend solutions for enterprise-level talent matching.
  • Collaborated cross-functionally with product and design teams to streamline workflows.
Project

MyTalentX

The Talent Dashboard for PETRONAS matched employees with ideal roles using data analytics, reducing talent replacement time by 20% and improving role fit.

  • TypeScript
  • NodeJS
  • ExpressJS
  • ReactJS
  • SQL Server
  • Azure DevOps
  • SonarQube
MIS Labs logo
MIS Labs
IoT & Blockchain Intern
June 2021 - February 2022
Vietnam
  • Researched IoT architecture and blockchain integration strategies.
  • Developed a microservices-based system to manage and sync IoT devices.
  • Ensured high availability and transparency using smart contracts and decentralized data models.
Project

Multi Tenant Shared Supply Chain

System using microservice architecture to integrate IoT devices into supply chains with blockchain support.

  • JavaScript
  • Solidity
  • Docker
  • Python
  • MongoDB
  • Redis
  • NGINX
  • Git
  • DigitalOcean
OnAds logo
OnAds
Software Engineer
October 2020 - June 2021
Vietnam
  • Built responsive web tools and platforms focused on green initiatives.
  • Enhanced performance and SEO of high-traffic user-facing apps.
  • Participated in code reviews and continuous integration workflows.
Project

PlantTrees

Eco-conscious search platform that rewards users with tree planting for each search.

  • Angular
  • Git
  • Firebase
Project

TenereTeam

Platform to help users save money and shop sustainably.

  • PHP
  • Laravel
  • JQuery
  • Git
  • NodeJS
  • PostgreSQL
VMO Holdings logo
VMO Holdings
Full Stack Web Developer
June 2019 - September 2020
Vietnam
  • Led frontend and backend teams for multi-platform applications.
  • Defined software architecture and oversaw production deployments.
  • Delivered apps with real-time communication and secure data flow.
Project

Drop App

Event planning application allowing users to create and manage exclusive events.

  • NodeJS
  • NestJS
  • Docker
  • PostgreSQL
  • Swift
  • Git
Project

Demo Power

Management system upgrade for promotional team efficiency.

  • PHP
  • Symfony
  • Git
  • PostgreSQL
Project

WAWA

Live arcade gaming app with real-time user interaction and prize delivery.

  • NodeJS
  • Laravel
  • Swift
  • PostgreSQL
  • Git
WYZDEV logo
WYZDEV
Full Stack Developer
February 2017 - October 2018
Haiti
  • Designed and implemented full-stack solutions for business management systems.
  • Optimized legacy codebases and introduced modern practices.
  • Maintained high test coverage and release stability across multiple deployments.
Project

Epi d'or

POS management system for a fast food chain across multiple outlets.

  • Laravel
  • Android
  • PostgreSQL
  • Git
  • Jira
Project

WYZPAY

HR and payroll management system to streamline employee administration.

  • CakePHP
  • Git
  • PostgreSQL
  • JQuery
Project

Inassa

Insurance tracking platform for monitoring policy usage.

  • PHP
  • CakePHP
  • MySQL
  • Git
  • HTML
  • CSS
  • JQuery

> What stack do you use?

Here's my system.

Frontend, backend, database, infrastructure, and AI workflow tooling connected through a product and systems lens.

Frontend
  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
Backend
  • NestJS
  • Node.js
  • Prisma
  • REST
  • GraphQL
Database
  • PostgreSQL
  • MongoDB
  • Redis
Infrastructure
  • Docker
  • Nginx
  • Cloudflare
  • GitHub Actions
  • Vercel
  • VPS
AI / Tools
  • OpenAI
  • LangChain
  • RAG
  • AI workflows
  • coding agents

> Why should I hire you?

How I work.

I care about building the right thing, designing for scale early enough, and shipping quickly without creating avoidable future debt.

Problem First

Start with the actual constraint, then build only what moves the metric, workflow, or user outcome.

System Thinking

Design architecture that holds up when product complexity, traffic, and team size begin to compound.

Ship Fast

Move quickly, reduce feedback loops, and turn ideas into working software before the opportunity cools off.

Long-term Impact

Favor decisions that age well so today’s delivery speed does not become tomorrow’s rebuild bill.

> Let's work together

Let's build something serious.

I partner with teams that need thoughtful architecture, fast delivery, and AI systems that behave like real product infrastructure.

Location
Da Nang, Vietnam / Remote Worldwide
Let's connect