Vue.js
Express.js
Node.js
PostgreSQL
AWS
Docker
JavaScript
MongoDB
MySQL
CI/CD
Severino Osena - Senior Full-Stack Developer

Senior Full-Stack Developer

Severino Osena

Professional Summary

10+

Years Experience

Designing and delivering scalable web applications, SaaS platforms, and marketplace systems

1000s

Active Users

Production-ready systems used daily by thousands of users

AWS

Cloud & Payments

AWS deployments, Stripe integration, and performance optimization

Senior Full-Stack Developer with 10+ years of experience designing and delivering scalable web applications, SaaS platforms, and marketplace systems. Strong expertise in React, Next.js, Node.js, and NestJS with solid database architecture experience in MySQL and PostgreSQL. Experienced in cloud deployment (AWS), payment integration (Stripe), performance optimization, and building production-ready systems used by thousands of users. Focused on clean architecture, reliability, and business-driven development.

Professional Experience

Sep 2022 – Dec 2025

Senior Full-Stack Engineer | 8th Light

High-traffic production systems & SaaS platforms

Led architecture and delivery of scalable web applications handling high concurrent traffic.

  • Led architecture of production systems handling high concurrent traffic.
  • Designed APIs with caching and database tuning, reducing response times by 30%.
  • Improved system observability, reducing production incidents by 25%.
  • Mentored 4+ engineers, improving code quality and delivery speed.
Aug 2020 – Oct 2021

Senior Full-Stack Developer | Designli

SaaS platforms from concept to launch

Built and scaled SaaS products used by thousands of active users with reliable billing.

  • Built SaaS platforms from concept to launch used by 5,000+ active users.
  • Implemented Stripe billing, increasing recurring revenue stability.
  • Reduced infrastructure costs by 20% via caching and query optimization.
  • Contributed to AWS CI/CD pipelines improving deployment reliability.
Jan 2018 – May 2020

Software Developer | Atomic Object

Scalable web applications & internal tools

Developed scalable applications and databases supporting thousands of users.

  • Developed scalable applications supporting thousands of users.
  • Optimized PostgreSQL queries, improving system performance by 28%.
  • Participated in architecture planning and technical solution design.
Jul 2016 – Nov 2017

Software Programmer | Simform

APIs and legacy system modernization

Improved performance and maintainability of existing systems and APIs.

  • Improved API performance by 25% through query and schema optimization.
  • Refactored legacy modules, reducing bug rates and improving maintainability.
  • Collaborated in Agile teams delivering features on time.
🎓

Education

Bachelor of Science in Information Technology

Polytechnic University of the PhilippinesClass of 2010

Technical Skills

Frontend

React.jsNext.jsVue 3TypeScriptTailwindCSSResponsive Design

Backend

Node.jsNestJSExpress.jsREST APIs

Databases

PostgreSQLMySQLMongoDB

Cloud Platforms

Amazon Web Services (AWS – EC2, S3)

DevOps & CI/CD

DockerNginxCI/CD pipelines

Other

StripeJWT/OAuthPerformance OptimizationGit

Portfolio

Selected projects showcasing full-stack development, architecture, and delivery excellence

Custom Business Website — слайд 1Custom Business Website — слайд 2Custom Business Website — слайд 3

Custom Business Website

Engineered a production-ready business website with Nuxt.js, Vue.js, and Node.js, prioritizing clean architecture, performance, and long-term maintainability.

Vue.jsNuxt.jsNode.jsPostgreSQL

Fast loading · SEO-optimized · Mobile-first

Engineering Web Products Built to Last — слайд 1Engineering Web Products Built to Last — слайд 2Engineering Web Products Built to Last — слайд 3

Engineering Web Products Built to Last

Production-ready insurance business website focused on credibility, SEO, and lead generation.

WPBakeryNode.jsYoast SEO

Lead-focused · SEO-ready · Mobile-friendly

Crafting Scalable, Maintainable Web Platforms

Premium marketing website leveraging motion, video, and clean structure to communicate trust and drive client inquiries.

Node.jsExpress.jsAWSCloudflare

Thoughtful design · Clean execution

Building Reliable Web Solutions for Real Businesses — слайд 2Building Reliable Web Solutions for Real Businesses — слайд 3Building Reliable Web Solutions for Real Businesses — слайд 4Building Reliable Web Solutions for Real Businesses — слайд 5

Building Reliable Web Solutions for Real Businesses

Enterprise business website focused on scalability, structured content management, SEO visibility, and long-term reliability.

Node.jsMongoDBWordPressCDN

Enterprise-ready · SEO-focused · Maintainable

Trusted End-to-End Delivery for Real Businesses — слайд 1Trusted End-to-End Delivery for Real Businesses — слайд 2Trusted End-to-End Delivery for Real Businesses — слайд 3Trusted End-to-End Delivery for Real Businesses — слайд 4Trusted End-to-End Delivery for Real Businesses — слайд 5

Trusted End-to-End Delivery for Real Businesses

Enterprise business website powered by Node.js and Python services with PostgreSQL storage, Odoo integration, and Nginx-based infrastructure for performance and reliability.

NginxPythonOdooPostgreSQL

People-first · Trust-focused · Professional

Building Structured, Results-Driven Web Products — слайд 1Building Structured, Results-Driven Web Products — слайд 2Building Structured, Results-Driven Web Products — слайд 3Building Structured, Results-Driven Web Products — слайд 4

Building Structured, Results-Driven Web Products

Education platform combining a CMS-driven marketing site (plans, content, and checkout flow) with a separate JavaScript SPA portal for online mock exams, progress tracking, and account-based access.

WooCommerceDockerBootstrapCaching

Results-driven · Progress tracking · Exam-ready