Full-Stack Developer

Building full-stack
products from MVP to scale.

Senior software engineer with 7 years of experience specializing in AI integration and full-stack development. React, Node.js, and building SaaS systems from scratch.

Get in TouchView Projects
Experience
7+

Years in Software

Users Reached
5K+

Active SaaS Users

Integrations
250+

Third-Party Apps

Production Issues
40+

Resolved & Shipped

About Me

Senior Full-Stack Developer

Senior software engineer with 7 years of experience specializing in AI integration and full-stack development. Expert in React, Node.js, and API design, with a proven track record of building full SaaS systems from scratch — through MVP to thousands of active users. Skilled in system design, API integrations, and front-end UI/UX. Led product launches, rebuilt application interfaces and landing pages for measurable SEO gains, and developed workflow automation tools that directly enabled strategic business deals.

Skills & Technologies

TypeScriptGoPythonReactNext.jsNode.jsGraphQLAWSDockerPostgreSQLMongoDBTailwind CSSPrismaLLMsPrompt Engineering

Full-Stack SaaS Builder

End-to-end product launches from MVP to thousands of active users. Built complete SaaS systems from scratch.

AI Integration Expert

Built coding-capable AI agents, RAG systems, chat interfaces with tool calling, and AI-powered automation platforms.

Workflow Automation

Developed automation tooling integrating 250+ third-party applications working alongside AI Agents through MCP servers.

Cross-Functional Leader

Bridges engineering and product to drive outcomes. Led product launches, negotiated deals, and rebuilt interfaces for measurable gains.

Work Experience

Where I've Worked

Lead Software Engineer

11/2023 — 04/2026

Mazaal AI

• AustraliaFull-time
  • Worked with a team of 2 engineers through the end-to-end product launch, growing from 0 to 5,000 active users within 7 months
  • Overhauled the application's front-end architecture and API layer, reducing client-side errors by 90% and enabling direct AI model training workflows — cutting manual annotation time by 2 hours/week
  • Led successful product launch and negotiated strategic subscription deals with major retail partners
  • Developed workflow automation tooling integrating 250+ third-party applications, working alongside AI Agents through MCP servers
  • Built a coding-capable AI agent with multi-platform chatbot integration, powered by custom API, RAG, and advanced prompt engineering
  • Created an AI chat interface supporting seamless tool calling, reasoning, and third-party API integrations
ReactNode.jsAITypeScriptAWS

Full-Stack Developer

10/2022 — 10/2023

Ipsun Sunvoy

Full-time
  • Built and maintained blog-powered landing pages and integrated 5+ third-party solar inverter APIs and CRM platforms
  • Developed a Puppeteer-based scraping pipeline that auto-generated screenshot-based monthly reports for 50+ clients, saving ~15 hours of manual work per month
  • Built a customer and inverter management tool for solar installers, enabling 30+ installers to track and manage 500+ customer accounts and devices
  • Improved system reliability by resolving 40+ production issues, implementing unit test coverage, and optimizing performance
ReactNode.jsPuppeteerAPI Integration

Mid-Level Full-Stack Developer

01/2021 — 10/2022

Fibo Global

Full-time
  • Collaborated on cloud infrastructure service widely used by Mongolian tech companies (cloud.mn)
  • Developed a paid tech blog platform rewarding authors for quality articles
  • Built an internal project management tool for tracking projects, tasks, and hours
  • Renovated and updated legacy landing pages to modern designs
ReactNode.jsMongoDBDocker

Full-Stack Developer

03/2021 — 05/2021

Trap.mn

Part-time
  • Developed a web service for reporting security threats and attacks to cloud servers
  • Created a reporting summary exporter tool for log data to CSV
  • Built a back-office section for managing user subscriptions
ReactNode.jsPostgreSQL

Full-Stack Developer

08/2019 — 10/2019

Freelance

Freelancer
  • Developed an eCommerce website for furniture sales using React, Express.js, and MySQL
  • Assisted senior students with deploying React and Node.js projects to cloud servers
ReactExpress.jsMySQL

Entry-Level Front-End Engineer

05/2019 — 08/2019

Erxes INC

Full-time
  • Fixed layouts in CSS and React, updated developer documentation, and wrote snapshot unit tests in Jest
ReactCSSJest
Side Projects

Things I've Built

Personal projects and side ventures I've built from the ground up.

02/2026 — Present
Convex AI
Convex

A next-generation AI-powered messenger platform delivering intelligent, automated customer service. Unifies Facebook Messenger, Instagram, Viber, and more into a single inbox.

AIReactNode.jsMulti-Platform
08/2023 — Present
Puck Finance
Automatic Crypto Trading Bot

Built an API connecting TradingView signals to Binance API for automated futures trading. Integrated with a Discord bot for tracking trades, balance, and P&L.

GoTradingAPIDiscord
01/2026 — 03/2026
Immi Flow
Immi Flow

AI-powered immigration process system for Australian migration agencies. Automated support center across Messenger, Instagram, WhatsApp with AI analytics and self-improving agents.

AIReactNode.jsWhatsApp
Education

Education

Bachelor's Degree in Computer Science

National University of Mongolia

Ulaanbaatar, Mongolia • 01/2016 — 01/2020

Credentials

Certifications

Certified Blockchain Expert

Blockchain Council • 04/2022 — Present

AWS Certified Solutions Architect

AWS • 07/2021 — 07/2024

Get in Touch

Let's Connect

Have a project in mind or looking for a senior full-stack developer? Let's talk about how I can help.

nyamkamunhjin@gmail.com
Australia / Remote