SaaS Product Backend

Tnyl

High-performance mobile backend built for scale.

FROM INPUT TO IMPACT
MOBILE CLIENTREST APIOAUTHMONGODBRESPONSE
PROJECT

Tnyl

PERIOD

2023

BUILT WITH

TypeScript · Node.js · MongoDB · Mongoose · OAuth

The idea behind the build.

A mobile SaaS startup needed a lightweight, low-latency API layer that could handle concurrent user activity, OAuth authentication, and structured user data while keeping server costs predictable.

What I brought to it.

Backend Engineer. Architected REST APIs using TypeScript, designed indexing strategies on MongoDB with Mongoose, and implemented secure OAuth token exchange flows.

The system

A microservice-ready backend architecture providing lightning-fast API responses for mobile clients, structured schema validation, and secure device session management.

The interesting challenge

Reducing mobile API response time through index optimization and lean serialization.

Under the hood
  • TypeScript API architecture utilizing Fastify/NestJS principles
  • Lean MongoDB document schema design with targeted compound indexing
  • OAuth2 token verification and secure refresh cycle
  • Centralized error-handling and telemetry logging
What shipped
  • Fully typed REST API suite with automated schema validation
  • Query pipelines optimized for mobile payloads
  • Production-tested authentication flow across cross-platform mobile apps

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Death Countdown MVP

All selected work