Building scalable full stack systems with Next.js and NestJS

Founder of EloFlos | Gamify Real World Progress

I’m the creator of EloFlos, a full stack platform that tracks real-world activities and converts them into structured progression systems (XP, levels, leagues).

I build systems that:

• record and validate user activity
• calculate progression (XP, levels, rankings)
• present data through dashboards and social features

My focus is on full stack development, system design, and building products that people actively use.

• Building EloFlos (multi-module platform: sport, fitness, productivity)
• Developing backend systems using NestJS (Fastify) and Supabase
• Designing progression systems: XP, levels, leagues, rewards
• Implementing secure data handling with RLS + backend validation
• Refining frontend architecture and UI using Next.js

EloFlos (formerly PingElo) → https://eloflos.vercel.app

A platform where users:

• track real-world activity
• gain XP and level up
• compete in leagues
• interact through shared systems

• Designed a reusable XP and leveling system supporting multiple activity types
• Built backend validation to enforce data integrity alongside Supabase RLS
• Structured a modular system allowing new domains to plug into the same progression engine
• Developed responsive dashboards and navigation systems using Next.js
• Designed backend services using NestJS (Fastify) for performance and scalability

• EloFlos - Core platform (progression, leagues, social systems) (private)
• EloFlosMerch - Physical extension of platform identity and rewards
• NextJsTemplate - Reusable frontend foundation (layout, navigation, design system)
• NestJsTemplate - Backend foundation (modular architecture, validation, API structure)
• Portfolio - Presentation layer for projects and system design

Core

Backend

Data

Infra

• Modular architecture supporting multiple activity domains
• Shared progression system across all modules
• Backend validation combined with database-level security (RLS)
• Clear separation between frontend, API, and data layers

Build systems where real-world effort translates into measurable progress.

Feel free to reach out for:

• Collaboration
• Feedback
• Early access to EloFlos