Senior full-stack developer

I design, modernize, and ship secure web and mobile platforms.

5+ years building high-availability systems with Node.js, NestJS, Laravel, Next.js, React, cloud infrastructure, payments, monitoring, and production support.

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Work preferenceOpen to All Opportunities
Primary stackNode.js, NestJS, Laravel, Next.js
Best fitTeams that need secure backend, frontend, and cloud delivery
  • Built Laravel, NestJS, Express.js, Next.js, and React systems in production
  • Handled payment flows, OTP auth, report generation, monitoring, and deployment
  • Experienced with legacy modernization, dashboards, mobile support, and cloud storage
5+ yearsFull-stack software delivery
7 rolesFull-time, contract, volunteer, and intern work
6 sectorsAutomotive, fintech, govtech, healthtech, education, media
7 projectsProduction examples across this portfolio

About

Built for teams that need execution, ownership, and calm delivery.

I specialize in secure distributed backends, fast user-centric frontends, and practical architecture for products that need to scale without becoming hard to operate.

Over the last 5+ years, I have worked on systems for vehicle history, investment products, national-scale data collection, healthcare operations, education, media, and service businesses. That range matters because it taught me how to adapt quickly without lowering quality.

I am comfortable taking a feature from planning to production: shaping the interface, building the API layer, handling data concerns, integrating payments or third-party services, and supporting deployment and monitoring after release.

WANT TO DIG DEEPER?
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Capabilities

What I can own across a product team.

Backend and secure platform delivery

Designing APIs, authentication flows, payment integrations, report generation, and maintainable service layers for production systems.

  • Node.js, NestJS, Express.js, Laravel, PHP
  • OTP authentication, Stripe, PayPal, KBZ Pay, email delivery
  • PostgreSQL, MySQL, MongoDB, Firebase

Frontend, dashboards, and mobile workflows

Building fast interfaces that match business workflows, reduce friction, and stay maintainable after launch.

  • Next.js, React, TypeScript, Tailwind CSS
  • User/admin dashboards, report history, CMS interfaces
  • React Native and Cordova support for mobile data entry and offline access

Cloud, operations, and reliability

Shipping features is only half the job. I also care about uptime, observability, and practical deployment workflows.

  • AWS, DigitalOcean, R2 Cloud Storage, Ubuntu, Linux
  • Docker, CI/CD, Nginx, Apache, Git
  • Datadog monitoring, error tracking, legacy migrations, infrastructure handoff

Core toolbelt

Current stack I reach for most often

Node.jsNestJSLaravelNext.jsReactTypeScriptPostgreSQLMongoDBMySQLAWSDigitalOceanR2 Cloud StorageDockerNginxDatadog

Experience

Career path across production web, mobile, and platform systems.

Nov 2024 - Present

Full-stack Developer (Contract / Freelance)

Siam Mandalar InternationalThailand / Remote
  • Built jpauctionsheet.com, a Laravel-based vehicle history platform with VIN checking, user and admin dashboards, OTP authentication, credit packages, Stripe, PayPal, and KBZ Pay payments.
  • Implemented PDF report generation, email delivery, blogs, feedback workflows, and transaction tracking for paid vehicle history services.
  • Developed autovinhub.com, a Next.js and TypeScript VIN report platform connected to Laravel APIs for VIN image scanning, report credit purchases, Carfax and AutoCheck availability checks, and report history management.

Selected work

Case studies that show product thinking, not just screenshots.

SDAX

Full-time work

SDAX

Supported a regulated digital assets platform during its move from Java Spring WebFlux to an Express.js and Next.js stack.

  • Helped move platform functionality toward a modern Node.js and Next.js stack.
  • Maintained mission-critical admin and user-facing surfaces in a production fintech environment.
Next.jsExpress.jsTypeScriptJava Spring
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AutoVinHub

Client project

AutoVinHub

Developed a Next.js and TypeScript VIN report platform connected to Laravel APIs for paid vehicle history workflows.

  • Enabled users to scan VIN images, check Carfax and AutoCheck availability, and manage purchased reports.
  • Connected a fast frontend experience to Laravel APIs suited for payments, report credits, and account workflows.
Next.jsTypeScriptLaravel APIsStripe
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Little Myanmar

Client project

Little Myanmar

Built a Laravel-based restaurant platform that supports flexible menus, guest checkout, and Stripe payments.

  • Handled restaurant and catering menu logic inside one coherent ordering experience.
  • Supported guest and member checkout with secure Stripe payment integration.
LaravelPHPjQueryStripe
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JP Auction Sheet

Client project

JP Auction Sheet

Built a Laravel-based vehicle history platform with VIN checking, dashboards, OTP authentication, report generation, and multiple payment methods.

  • Built VIN checking and report-credit workflows for car buyers and dealers.
  • Integrated global and local payment options including Stripe, PayPal, and KBZ Pay.
LaravelPHPOTP authStripe
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Yun Home Renovation

Client project

Yun Home Renovation

Built a renovation company website in Next.js and TypeScript with an emphasis on speed, SEO, and premium presentation.

  • Delivered a clean lead-generation website with strong visual presentation.
  • Optimized for performance and SEO to support discoverability and trust.
Next.jsTypeScriptTailwind CSSSEO
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Viabells

Full-time work

Viabells

Built a professional corporate website in Next.js with a presentation style suited to a Singapore-based business.

  • Delivered a polished, brand-aligned corporate web presence.
  • Used server-rendered delivery patterns to support performance and SEO.
Next.jsMaterial UIReactSSR
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A.M Skincare

Full-time work

A.M Skincare

Developed a bespoke WordPress and PHP implementation with custom theme and plugin work for a skincare brand.

  • Delivered a custom storefront and brand experience tailored to the client.
  • Implemented theme and plugin work to support features beyond a default setup.
WordPressPHPCustom pluginsJavaScript
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Contact

Hiring, freelance work, and recruiter outreach are all welcome.

Direct contact

Zay Lin Htet

If you are hiring for a full-stack engineer who can contribute across product, backend, frontend, and infrastructure, send me a note. I am especially interested in remote product work, contract builds, and roles that need ownership across architecture, delivery, and operations.

zaylin13.dev@gmail.com
+66 889131528 / +95 9795927748
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