Uma S.

Demo profile

Backend Developer - SQL & Data Queries

Mendoza, Argentina·2+ years·Spanish / English

Bio

I write efficient SQL queries and optimize database performance. 2 years working primarily with PostgreSQL. I understand indexes, query plans, and when to use joins vs subqueries. Math background, learned programming through data analysis. I write queries that are readable and performant. My migrations are safe and my data transformations are tested. Analytical thinker who loves problem-solving.

Skills

Node.jsTypeScriptPostgreSQLREST APIs

Work style

Detail-orientedSystems thinkerCalm communicator

Portfolio (sample case studies)

Analytics Dashboard for B2B SaaS

Sample

Created complex reporting dashboard with custom date ranges, exports, and drill-down capabilities. Optimized queries to handle millions of events.

PostgreSQLTypeScript

SaaS Billing & Subscription System

Sample

Designed and implemented complete subscription management with Stripe. Handled proration, dunning, usage tracking, and admin billing tools.

Node.jsPostgreSQL

Inventory Management Dashboard

Sample

Created real-time inventory system with stock alerts, purchase order automation, and multi-warehouse support.

PostgreSQLREST APIs

Search & Filter System Optimization

Sample

Rebuilt product search with faceted filtering, autocomplete, and relevance ranking. Improved search speed by 10x using proper indexing.

PostgreSQLNode.js

High-volume Background Job Processor

Sample

Architected reliable job processing system handling 100K+ tasks daily with proper retry logic, dead letter queues, and observability.

Node.js