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Pelham, NH · Greater Boston · Remote US

Hire a senior full-stack developer who ships the whole thing.

I'm Bunlong Heng - a Senior Full-Stack Developer with 12+ years building secure, scalable, high-performance web applications end to end, from the database and API to the last pixel of the UI. Based in Pelham, New Hampshire, just north of Boston, working with teams across New England and remote across the US.

Start a conversationSee 50+ shipped apps

The stack I ship with

  • React
  • Next.js
  • TypeScript
  • Node.js
  • Express
  • Laravel
  • PostgreSQL
  • MySQL
  • Redis
  • Tailwind CSS
  • AWS
  • Docker
  • GitHub Actions
  • Auth0
  • SAML 2.0
  • Playwright
  • Datadog

What I build

Product web apps

Customer-facing React and Next.js applications in TypeScript - from the data model and API to a polished, accessible, fast UI. Built to ship, then kept shipping.

APIs and data

Node.js / Express and Laravel services on PostgreSQL and MySQL. REST and GraphQL, caching with Redis, queues, integrations with third-party platforms, and the tests that keep them honest.

Authentication and security

Auth0 across web and mobile, SAML 2.0 and OpenID Connect, OWASP hardening, security reviews and remediation. CompTIA PenTest+ and CEH certified, so the fixes come with the findings.

Cloud, delivery and performance

AWS (S3, Aurora, CloudFront), Docker, CI/CD with GitHub Actions, Vercel and Linode. Observability with Datadog and Sentry. This site runs at Lighthouse 100 - your product can too.

Proof, not promises

  1. Thryv - Senior Full-Stack Developer, 2023 to present

    Architected and shipped the Advanced Campaign Editor React application end to end for the Business Center platform; own Auth0 authentication across web and mobile including SAML 2.0 and custom flows; design Node.js / Express APIs and high-performance analytics dashboards.

  2. Benu Networks - Senior Full-Stack Web Developer, 2015 to 2022

    Built large-scale enterprise portals with React, Laravel and Node.js for telecom customers across the US, Canada, Europe and South America, plus the Node.js microservices behind them.

  3. 50+ self-hosted apps and developer tools

    Dev tools, AI / MCP tooling, games and real deployed products - every one designed, built, deployed and maintained solo, in the open on GitHub.

Full history on the experience page.

3 ways to work together

Senior full-time

Remote across the US, or hybrid around Boston and Southern New Hampshire. Senior or staff-level full-stack roles where I own features end to end.

Contract / project

A defined build - a new product, a migration to Next.js, an auth overhaul, a performance or security push - scoped, estimated and delivered with tests.

Fractional / advisory

A few days a month for a team that needs a senior full-stack hand: architecture reviews, code audits, unblocking the hard parts.

Where I work

New Hampshire, Massachusetts, Maine, Rhode Island and New York on site or hybrid; the rest of the United States remote.

  • Pelham, NH
  • Nashua, NH
  • Manchester, NH
  • Salem, NH
  • Portsmouth, NH
  • Lowell, MA
  • Boston, MA
  • Cambridge, MA
  • Worcester, MA
  • Providence, RI
  • Portland, ME
  • New York, NY
  • Remote - anywhere in the US

Questions hiring managers ask

Where are you based, and do you work remotely?
I am based in Pelham, New Hampshire, about 40 minutes north of Boston. I work remotely with teams anywhere in the US and can be on site around Boston, the Merrimack Valley and Southern New Hampshire.
How many years of full-stack experience do you have?
12+ years as a full-stack developer, senior level since 2015, across product companies in Massachusetts, New Hampshire and Texas - most recently Thryv, Monitaur and Benu Networks.
What is your main stack?
React, Next.js and TypeScript on the front end; Node.js / Express and Laravel on the back end; PostgreSQL and MySQL; AWS for infrastructure; Auth0 and SAML 2.0 for authentication. I hold AWS, CompTIA PenTest+ and CEH certifications and a B.S. in Computer Science from the University of Massachusetts Lowell.
Do you take contract or freelance work?
Yes - defined projects and fractional engagements alongside senior full-time roles. Every engagement starts with a written scope and ends with tests, documentation and a clean handoff.
Can I see your code?
Yes. 50+ shipped apps and tools are on GitHub at github.com/bunlongheng, with live demos linked from the projects page on this site.

Have a product to build or a team to strengthen?

Tell me what you are building. I reply to every message.

Contact Bunlong