Skip to content
Raymund F. Cuizon

Senior Full Stack Software Engineer

I turn ideas into software people can actually use.

I build SaaS products, business platforms, APIs, and AI-powered applications from architecture to production. With 12+ years of experience, I work across backend, frontend, databases, cloud infrastructure, and integrations—bringing the technical ownership needed to take a product from idea to something real.

I started my career in an era where documentation, source code, debugging, and manual testing were the tools we relied on to solve problems. Today, I bring those same engineering fundamentals into an AI-assisted development workflow—using AI to accelerate research, implementation, testing, debugging, documentation, and iteration without outsourcing the engineering judgment behind the work.

Start a projectSee selected work

Available for freelance and contract work. Based in the Philippines, working remotely with international teams.

What I take on

Bring me in when the backend is the hard part.

Most of my work is one of these six. If yours is close to one of them, it is probably a good fit.

  • New product development

    Take an idea from architecture through development and deployment, including the parts nobody enjoys specifying.

  • Backend and API work

    APIs, business logic, data models, authentication, background jobs and the services behind them.

  • Integrations

    Connect your app to ecommerce platforms, ERPs, payment providers, fulfilment and inventory systems.

  • Existing codebases

    Pick up an unfamiliar system, ship new functionality in it, and fix production issues without a rewrite.

  • Performance and reliability

    Slow queries, inefficient data access, tenant-isolation bugs, scaling limits and production failures.

  • Legacy modernisation

    Move an older stack forward while keeping the business rules that are already working.

Selected work

Two products of my own, and the client work behind them.

Both products are live and in beta. Everything below them shipped for someone else.

My own product · Philippine payroll SaaS

Payzone

Semi-monthly Philippine payroll for accounting firms that run payroll for everyone else. One subscription covers any number of client companies, each an isolated payroll.

Every peso is computed from the timesheet. SSS, PhilHealth, Pag-IBIG and BIR withholding are built in and dated, so recomputing an old cutoff uses that year's tables. Currently in beta.

Founder and engineer

  • Seven-step cutoff with separation of duties — a preparer cannot check or approve their own run
  • Monthly-rated and daily-rated employees in one register, rounded to the centavo per line
  • Year-end processing: Form 2316 PDFs and the 1604-C alphalist
  • Employee names, salaries and government IDs are invisible above the firm by design, not by policy
NestJSNext.jsTypeScriptPostgreSQLPrisma

My own product · Order management SaaS

BakerZonePH

Order management for Filipino home bakers, built so a baking business stops living across Facebook, Messenger, Instagram, texts and spreadsheets.

Centralises the workflows a small baking business actually runs on: orders from inquiry through delivery, customers, catalogue and the numbers underneath. Currently in beta, with invite-based onboarding.

Founder and engineer

  • Orders tracked end to end with dates, deposits and notes
  • Customer records with full order history for repeat business
  • Product catalogue with pricing, sizes and availability
  • An assistant that turns Messenger chats into order forms, reading Taglish and local date references
NestJSNext.jsTypeScriptPostgreSQLPrismaDocker

Client and employer work

  • BIS Passport

    Multi-tenant business platform · Japan

    A business management platform for karaoke operators in Japan, paired with a digital membership-card experience for customers. Companies manage stores, members and member access history across multiple locations on one shared database.

    • Redesigned the member access-history subsystem — replaced fragile count-based logic with explicit store-scoped queries, grouped retrieval and parallel processing
    • Eliminated cross-tenant data leakage and removed row-limit failures that were silently truncating results
    • Restored production performance and made tenant boundaries explicit in the data-access layer

    NestJS · Next.js · TypeScript · Prisma · PlanetScale / MySQL · Monorepo

    Full-stack developer and backend owner — GSS Lab

  • Entame-Choice

    Entertainment booking marketplace · Japan

    A two-sided marketplace connecting musicians and entertainers with venues, event organisers and customers booking live performances.

    • Designed the NestJS backend and AWS infrastructure
    • Artist profiles, booking workflows, job board, message board and concierge booking
    • Built for handover: clean architecture, consistent conventions, documented APIs

    NestJS · Next.js · TypeScript · AWS RDS · AWS Lambda · Amazon S3

    Backend engineer, contributing frontend — GSS Lab

  • Bestlink College of the Philippines

    Student management system

    An end-to-end platform covering the student lifecycle for both College and Senior High School departments.

    • Admission, enrollment, subject loading, grading, billing, cashiering and scholarships
    • Set the system architecture and foundational boilerplate for backend and frontend
    • Led three developers through implementation, owning conventions and architectural decisions

    Laravel Lumen · GraphQL · MySQL · Angular · Apollo Client · AWS S3

    Technical consultant and lead developer

  • Moustache Republic

    Ecommerce integration engineering · APAC

    Backend and integration work for an APAC digital commerce agency, extending Shopify Plus and BigCommerce past their native capabilities for brands including AS Colour, Ksubi and Asahi Group.

    • Shopify and BigCommerce API integrations, webhooks and custom applications
    • Product, order, customer and inventory synchronisation
    • ERP and fulfilment integrations across multi-region B2B and B2C workflows

    Python · Flask · Shopify Plus · BigCommerce · AWS · React

    Backend developer

  • Accenture

    Enterprise engineering and modernisation

    Microservices, serverless development and legacy modernisation inside enterprise development environments.

    • Fleet management system built as backend services rather than one monolith
    • Modernised a legacy AngularJS recruiting platform to current Angular while preserving business workflows
    • Event-driven backend functionality on AWS Lambda

    Node.js · Angular · AWS Lambda · Azure DevOps · .NET Core · MSSQL

    Senior software engineer

  • Medisource

    Healthcare technology

    Established the initial architecture and codebases across healthcare, social impact and nonprofit products.

    • RealTime Workflow — digitised clinical, financial and administrative operations for US home health agencies
    • Woundtrack — digital wound documentation with automated measurement and longitudinal tracking, API and portal built from scratch
    • Planet Impossible and Earth Citizens Organization — social mission and nonprofit platforms

    PhalconPHP · AngularJS · MySQL · REST API

    Full-stack developer

  • Easycom Japan

    Logistics and business operations · Japan

    Business software for Japanese clients in logistics and supply-chain operations, where data accuracy, auditability and workflow consistency mattered more than surface polish.

    • Inventory management across multiple locations — stock levels, transfers, adjustments, low-stock alerts
    • Warehouse management covering receiving, put-away, picking, packing and shipping
    • Designed REST APIs and led backend and frontend work across several enterprise applications

    Node.js · Express.js · Python · Angular · CakePHP · Google Cloud

    Full-stack developer

How I work

Five steps, and the last one is the point.

The first four get it built. The fifth is what decides whether you still want to own it in a year.

  1. 01

    Understand

    The business problem, the users, the existing system, the constraints and the technical environment.

  2. 02

    Design

    Architecture, data model, API boundaries, business rules and integration points.

  3. 03

    Build

    Backend, frontend, integrations and the infrastructure the solution needs.

  4. 04

    Validate

    Important workflows, edge cases, data boundaries, failure scenarios and performance.

  5. 05

    Deliver

    Maintainable code, clear structure and documentation, so the project can continue without depending on one developer.

What I work with

The stack, without the proficiency bars.

Languages
TypeScript, JavaScript, Python, PHP, SQL
Backend
Node.js, NestJS, Express.js, Flask, Laravel Lumen, PhalconPHP
Frontend
Next.js, React, Angular, Tailwind CSS, React Native
APIs
REST, GraphQL, webhooks, JWT authentication
Data
PostgreSQL, MySQL, DynamoDB, Prisma, PlanetScale, Supabase
Cloud
Google Cloud, AWS, DigitalOcean, Docker, Nginx
Architecture
Microservices, serverless, multi-tenant, clean architecture
Commerce
Shopify Plus, BigCommerce, ERP and fulfilment integrations
AI
CLIP embeddings, vector similarity search, FastAPI and NestJS services, Ollama

Experience

Twelve years, seven posts.

Enterprise consultancies, a Japanese software house, an APAC commerce agency, healthcare, and two products of my own.

  1. GSS Lab

    Senior full-stack developer

    Aug 2023 — Present

  2. Moustache Republic

    Full-stack developer

    Mar 2022 — Aug 2023

  3. Accenture Philippines

    Senior software engineer

    Aug 2020 — Mar 2022

  4. Easycom Japan Philippines

    Technical lead

    Oct 2018 — Aug 2020

  5. Medisource Healthcare Systems

    Software developer

    Apr 2016 — Oct 2018

  6. Easycom Japan Philippines

    Web developer

    Oct 2014 — Apr 2016

  7. Puregold Price Club

    MIS technical support

    Feb 2013 — Oct 2014

Education

  1. Urdaneta City University

    BS Information Technology

    2007 — 2011

  2. Informatics International College

    Web Development Certification

    2012