David Sullivan

AI/ML • Dublin, Ireland • UTC+00:00 • Work permits: Ireland • Available now

Full Stack Developer

8+ years exp

SQL

PHP

Python

JavaScript

Node JS

TypeScript

Active 4 days ago

+353 (86) 3344272

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Overview

Technical skills

Timeline

Roles

Overview

Senior Full Stack Engineer with 7+ years of experience building SaaS platforms using React, Next.js, TypeScript, and Node.js. Delivered cloud-native applications on AWS and Azure, developing REST APIs and performance-focused front-end improvements. Implemented AI-powered features using OpenAI API with LangChain and contributed to system reliability through CI/CD automation and production support.

Technical skills

SQL

PHP

Python• Middle • 8y+

JavaScript• Middle • 8y+

Node JS• Senior • 8y+

TypeScript• Senior • 8y+

Node JS

Express

Databases

Pinecone

Redis

PostgreSQL• 8y+

MySQL• 5y+

AI/ML

AI Agents

LangGraph

RAG

LangChain

LLM

Frontend

Angular

GraphQL

Tailwind CSS

Vue.js

PostCSS

React.js• 8y+

Next.js

DevOps

Git

Rest API

AWS• 8y+

Docker• 8y+

GitHub Actions• 5y+

Azure

CI/CD

Jest

Mocha

Postman

Timeline

Senior Full Stack Engineer • Senior

Mentimeter • Full-Time

Jun 2024 to May 2025 11 Months Stockholm Partially remote

Led delivery of scalable full-stack features for a real-time SaaS platform used by a large monthly active user base. Built reusable React/Next.js/TypeScript component libraries and developed Node.js REST APIs for high-concurrency workloads. Implemented AI-powered content features using OpenAI API and LangChain, and improved performance metrics including Core Web Vitals. Contributed to AWS and Azure cloud-native architecture, automated CI/CD with Docker and GitHub Actions, and supported production reliability through reviews and incident resolution.

Next.js

React.js

TypeScript

Node JS

LangChain

LLM

AWS

Azure

Docker

CI/CD

GitHub Actions

Software Engineer • Middle

LearnUpon • Full-Time

Nov 2021 to Jun 2024 2 Years 7 Months Dublin In office

Developed and maintained backend services and REST APIs for a cloud Learning Management System supporting enterprise learning workflows. Built responsive, reusable front-end interfaces with React and TypeScript, and improved user experience via performance-focused changes such as code splitting and lazy loading. Designed and optimized data models and queries using PostgreSQL, MySQL, and MongoDB, and integrated third-party enterprise systems via secure API connections. Supported cloud and CI/CD delivery using AWS, Docker, and GitHub Actions while participating in Agile planning, testing, and code reviews.

Node JS

Python

PostgreSQL

React.js

TypeScript

JavaScript

MySQL

AWS

Docker

GitHub Actionssince 2021

Full Stack Developer • Middle

Quartr • Full-Time

Oct 2018 to Sep 2020 1 Year 11 Months Stockholm In office

Built and enhanced financial data web applications and interactive dashboards for enterprise clients. Developed REST APIs and backend services to process and deliver near real-time financial data using Node.js, Python, and PostgreSQL. Integrated external financial data providers and APIs, and improved performance by optimizing database queries and backend services. Supported deployment and reliability through containerized releases and CI/CD automation using AWS and Docker, and resolved production issues using root-cause analysis.

React.jssince 2018

TypeScriptsince 2018

JavaScriptsince 2018

Node JSsince 2018

Pythonsince 2018

PostgreSQLsince 2018

AWSsince 2018

Dockersince 2018