John Pecson
Legal name: John Anthony Pecson
Senior Product Engineer
Bacolod City, Philippines
jonpecson.io@gmail.com
https://github.com/jonpecson
https://www.linkedin.com/in/jonpecson
https://meowpass.dev
https://pickletime.ph

SKILLS

Frontend: Next.js, React, TypeScript, Tailwind, React Native
Backend: Node.js, NestJS, Fastify, Express, REST, WebSockets
Infrastructure: AWS, Docker, Kubernetes, Cloudflare
Database: PostgreSQL, MongoDB, Redis, Firebase
Architecture: Distributed Systems, Microservices, Event-Driven Systems, API Design, System Design
Developer Tools: Git, GitHub, Claude Code, Cursor

EXPERIENCE

Full-Stack Engineer (Contract)
Lockeroom Gym, Australia
Sep 2026 to Present
Part-time contract engineer on a Sydney personal-training gym's internal coaching platform and its companion member app, covering payments, performance, access control, release process and mobile.
- Migrated recurring payments from Adyen to Stripe across renewals, new member sales and instalment plans
- Built the payment workflow engine in n8n, with Xero accounting codes and GST handling
- Investigated and reduced coach dashboard load time on the member roster, profiling the slow queries behind it
- Audited production schema drift and restored silently broken features with no data loss
- Enforced member-app publishing permissions in Postgres with row-level security
- Shipped Android Health Connect through consent, privacy disclosure and Google Play review
- Added pull-request CI, concurrency and capacity testing on the booking system, and a release QA process

Lead Full-Stack Developer & Product Engineer
Empire Crypto Trading, Australia
Feb 2025 to Mar 2026
Led the technical evolution of a global crypto education platform, with a focus on high-concurrency architecture and real-time community engagement.
- Rebuilt the global crypto platform on Next.js and NestJS for long-term modular scalability
- Developed real-time notification and social features powering premium memberships
- Integrated Stripe subscriptions and Ably messaging into a high-availability cloud stack
- Architected and deployed new revenue-generating features with product leadership

Full Stack Developer
Workbeaver, United Kingdom
Sep 2024 to Jan 2025
Engineered the identity and authentication layer for enterprise-grade workflow-automation tools.
- Built secure authentication services for enterprise automation with Node.js and Docker
- Designed DynamoDB-backed identity management for high-concurrency workflows
- Implemented real-time operational monitoring with AWS CloudWatch

Co-Founder & CTO
Safe Technology Ventures, Singapore
Jul 2023 to May 2024
Led engineering for a fintech startup, building a secure dispute-resolution engine for online transactions.
- Architected a secure fintech dispute-resolution engine from concept to MVP
- Built complex transaction workflows with Next.js, Node.js, and PostgreSQL
- Defined the technical roadmap and core engineering decisions for the startup

CTO / Blockchain Consultant
Tradeshare LLC, United States
Dec 2020 to Dec 2021
Architected backend services and integrated blockchain protocols for an international trading ecosystem.
- Designed backend services for a trading platform on Node.js and PostgreSQL, including real-time trading analytics and financial-data processing
- Integrated external financial-data APIs and blockchain functionality into the platform's application workflows
- Owned technical architecture as CTO, translating product and business requirements into the backend and integration design

Blockchain Full Stack Developer
ProximaX, Singapore
Apr 2019 to Dec 2020
Built decentralized applications and backend services for enterprise blockchain solutions.
- Developed decentralized applications and backend services around the ProximaX blockchain ecosystem
- Built application flows covering blockchain authentication, transactions, and integration between conventional services and decentralized infrastructure
- Contributed scalable backend and microservice functionality supporting enterprise blockchain applications

Blockchain Full Stack Developer
NEM Foundation, Australia
Dec 2018 to Apr 2019
Developed blockchain applications, SDK integrations, and developer tooling.
- Developed applications and integrations around the NEM blockchain ecosystem, including SDK and API integrations
- Built developer tooling that made blockchain functionality easier to integrate into conventional applications
- Worked through the security and performance considerations of blockchain-connected application workflows

Full Stack Developer
Hybrain Development Corporation, Philippines
Nov 2017 to Aug 2018
Developed healthcare and enterprise software across frontend, backend, and cloud infrastructure.
- Developed healthcare and enterprise software across frontend and backend systems
- Built and integrated custom APIs, and worked on database-backed application workflows
- Improved database and application performance for business and healthcare systems

Web & Mobile Application Developer
Connxt LLC, United States
Jun 2014 to Jul 2016
Developed mobile and web applications for international clients.
- Developed web and mobile applications for international clients, across frontend and backend
- Worked on cloud-connected and IoT-style applications involving real-time data and analytics
- Built backend functionality for processing and storing application and device data, connected through to client-facing web and mobile experiences