Berwyn Felismenia

Full-Stack Software Engineer · Backend & System ArchitectureOlongapo City, Philippines

3+ years building scalable, high-throughput systems and AI-powered products across React, Go, Python & AWS. I thrive on solving hard problems and turning complex architecture into clean, maintainable software.

3+ yrsEngineering
2,000+req/s scaled
Millionsrecords handled

Technologies I Use

AngularAngular
ReactReact
NextJSNextJS
NestJS
DjangoDjango
LaravelLaravel
GoLangGoLang
PythonPython
TypescriptTypescript
AWSAWS
DockerDocker
PostgreSQLPostgreSQL
MySQLMySQL

Experience

  1. Career Team

    Software Engineer · Workforce Services Company

    • •Modernized and maintained large-scale legacy systems, upgrading aging codebases to current frameworks and standards.
    • •Implemented React Query for server-state management and data fetching, improving frontend performance.
    • •Shipped new features within the architecture and design direction set by the architecture team.
    • •Helped drive code quality alongside technical leads through clean-code practices and code reviews.

  2. SKYDEV Solutions

    Software Engineer · IT Solutions Company

    • •Architected and built a high-throughput system from the ground up on minimal hardware, scaling sustained capacity from ~600 req/s to 2,000+ req/s — a 3–4× increase in throughput while keeping infrastructure costs low.
    • •Optimized critical database queries to handle millions of records, significantly reducing query response time.
    • •Designed scalable, maintainable system architectures, integrating front-end and back-end across key features.
    • •Created and maintained comprehensive technical documentation for internal teams and stakeholders.

  3. ForgeXin

    Software Developer (Freelance) · Startup

    • •Led end-to-end architecture design, defining scalable, maintainable structures adopted across the project.
    • •Led the design and integration of the core algorithm into the product.
    • •Coordinated a team of developers — providing technical guidance, code direction, and mentorship.
    • •Owned client and cross-team communication to keep delivery aligned with requirements.

  4. ZAMECO II Service Center

    IT Support

    • •Ensured the safety and effectiveness of the company's electrical systems, using specialized software to locate and label poles for inspection crews — enabling a more efficient procedure for evaluating electrical wiring.

Projects

FitCheckAI

AI Virtual Try-On SaaS · Web App & Chrome Extension

An AI virtual try-on platform that generates photorealistic images of users in any garment using Google Gemini models.

  • •Designed an async generation pipeline with background processing, status polling, and a self-healing job sweep that auto-refunds failures.
  • •Built a metered credit system on atomic PostgreSQL operations and integrated Stripe subscriptions with idempotent webhooks.
  • •Hardened with JWT-validated APIs and SSRF-safe image handling, plus a Manifest V3 Chrome extension for one-click try-ons.
Next.jsTypeScriptSupabaseStripeGemini AI

Finance Tracker

Chat-First AI Expense Tracker · SaaS-Ready Web App

A chat-first finance app that parses natural-language entries into structured transactions with confidence scoring and an AI spending advisor.

  • •Designed a provider-agnostic LLM adapter (Anthropic / OpenAI), validating output against real category IDs to prevent hallucinations.
  • •Engineered an async FastAPI / SQLAlchemy 2.0 backend on Supabase Postgres, secured with Supabase Auth (ES256 JWT).
  • •Generated typed API clients from OpenAPI for an end-to-end type-safe stack.
Next.jsTypeScriptFastAPISupabaseClaude / OpenAI

Trading Tracker

AI Trade Analysis & Journal · Paper-Trading Engine

AI-powered trade analysis that fetches live market data, computes indicators in code, and has an AI reason over them to produce structured trading plans.

  • •Pulls live OHLCV via ccxt and computes exact indicators and SMC/ICT patterns in pure Python — code owns every number, the model only judges setup quality.
  • •Produces structured trading plans (entry zones, stops, targets, Pine Scripts) with deterministic post-processing that enforces minimum R:R and regime gates.
  • •Includes a deterministic auto paper-trader for unattended forward-testing and an on-demand AI reviewer that grades each trade — paper-only, never places real orders.
Next.jsPythonccxtSupabaseClaude / GPT / Grok

Ads Generator

AI Ad-Creative Generator · Credit-Billed SaaS

An AI ad-creative generator that turns a brand or product identity into consistent, on-brand marketing visuals and copy.

  • •Built identity packs so users upload reference assets, then generate on-brand creatives via fal.ai image models with LLM-written copy.
  • •Designed an async job pipeline with signed upload URLs, background generation, and status tracking.
  • •Integrated a Stripe-billed credit system with webhook-driven entitlements.
Next.jsfal.aiClaude / OpenAISupabaseStripe

Tend

Goal-Oriented Journaling · Installable PWA

A journaling app that maps daily reflections onto your goals — progress through honest writing, not streaks.

  • •Mirror-first composer is the landing experience; each entry is AI-analyzed into one or more contributions (progress / milestone / neutral / setback) with intensity.
  • •Surfaces a GitHub-style contribution heatmap overall and per goal, plus AI-generated weekly reflections.
  • •Installable PWA with light/dark theming, built on Supabase auth and a pluggable AI provider.
Next.jsTypeScriptSupabaseOpenAIPWA

Litok

Travel Discovery Platform · Web & Mobile

A travel discovery app that aggregates third-party OTA data and deep-links to bookings — an inventory-free, affiliate-commission model.

  • •Architected a Turborepo spanning a Next.js web app, a mobile app, and a shared API.
  • •Aggregates and surfaces third-party travel data, deep-linking to OTAs to earn affiliate commission without holding inventory.
TurborepoNext.jsMobileTypeScript

Thoughts

Fix your bugs

Fix your bugs

Have you ever experienced being stuck on a particular line of code that every time you try to run your code you are getting the same problem to your code, that it takes you an hour or even days to figure out what is the problem to your code?

DebuggingDev Tips
Intro to Data Science Path

Intro to Data Science Path

Focuses on introducing what skills we should possess when pursuing to become Data Science one day.

Data ScienceCareer

Contact

You can contact me via Email, LinkedIn, or Instagram. I usually respond within one day.

© 2026 Berwyn Felismenia