Stable
A digital wallet and neobank used across several countries — accounts, transfers, cash-in/out, cards, and KYC, plus a business side for merchants.
Core backend engineer. Built the authentication platform, a login security layer, the notification service, and a campaign engine; connected regional payment providers. On the business side I built Payment Way end to end — an API-first way for outside businesses to plug in (backend, merchant dashboard, and developer docs).
Node.jsTypeScriptMongoDBRedisBullMQAWSNext.js
Car-Rental Marketplace
A peer-to-peer car-rental marketplace — hosts list vehicles, guests book them, with live chat and real-time booking updates.
Built entirely on my own — backend and website. Raw-SQL PostgreSQL data layer, real-time chat/presence/booking status, and background jobs. My clearest proof of full-stack ownership.
Node.jsTypeScriptPostgreSQLRedisSocket.IONext.js 15React 19
content-agent
An AI agent that plans, writes, and schedules social posts on its own, then posts to multiple platforms.
Built solo: a LangGraph state-machine agent (intent → plan → validate → execute) with a registry of tools, peak-time scheduling, and vector search.
TypeScriptLangGraphLangChainMongoDBRedisBullMQVector search
Cybersecuritycompany workCybersecurity Analytics Backend
A multi-tenant platform that ingests alerts from several security tools and turns them into risk reports teams can act on.
Major author. Built the alert-ingestion pipelines and background workers, per-organization usage limits, and multi-language risk reporting.
Node.jsExpressMongoDBElasticsearchBullMQRedisAWS
Distributed systemscompany workNotification Microservice
A standalone service that sends every email, SMS, push, in-app, and WhatsApp message for a fintech platform.
Lead author. Built it from scratch: a provider-abstraction layer with vendor fail-over, queue workers, retries/backoff, dead-letter handling, and PDF statements.
TypeScriptNode.jsAWS SQS/SNSMongoDBRedisElasticsearch
Product-Review Platform
A product-review and discovery platform — products, brands, reviews, and the search and ranking behind the feed.
Dominant author. Built the product/brand/review APIs and the search, sorting, and ranking, over a dual MongoDB + PostgreSQL data layer.
TypeScriptExpressMongoDBPostgreSQLFirebaseSocket.IO
Loyalty & Rewards Platform
A multi-tenant loyalty engine that serves many businesses at once, each with their own programs, points, and rewards.
Primary author. Built per-tenant routing and permissions, budget-aggregation pipelines, order fulfillment, and full localization.
Node.jsExpressMongoDBRedisAWS S3
Missions & Quests Service
The missions/quests microservice inside a loyalty and gamification platform.
Built reward calculation, online/offline reservation modes, and agent-action approval flows.
TypeScriptExpressMongoDBRedis
Fintech / KYCcompany workIdentity & Wallet Service
An identity-verification and wallet service that checks IDs and selfies and moves money safely.
Sole author. Built the whole service on Deno — one-time-password auth, document/selfie verification with third-party KYC, and wallet APIs.
DenoOakMongoDBRedisAWS S3
vaultiq
A mobile app that cleans up your photo gallery using on-device AI.
Built solo — a Flutter app with local storage.
FlutterDart
pdf_tools
A mobile PDF toolkit — merge, compress, and convert PDFs.
Built solo — a Flutter app.
FlutterDart