Tekeshwar Singh

Tekeshwar Singh

senior software engineer · india · UTC+5:30

github · linkedin · x · medium · newsletter · email

I'm a senior software engineer with 5+ years shipping full-stack products: payments infrastructure, AI search pipelines, multi-tenant SaaS, and offline-first mobile apps. I like systems that survive contact with production.

Currently at xFarm Technologies, building Flutter apps for a farm management platform serving 600,000+ farms across 14M+ hectares. Before that I owned the backend platform at Breakthrough, where I built Stripe billing on AWS ECS, AI semantic search on Vertex AI, and a Next.js paywall serving 60+ brands from one codebase. Earlier: PixelApps and Pingolearn.

On the side I ship open source, most recently pglens, a PostgreSQL viewer, and Wallbay, a Flutter wallpaper app with 114+ GitHub stars. I have strong opinions about webhook idempotency and will share them unprompted.

work

2026 – now

xFarm Technologies · Senior Software Engineer

Mobile team on a farm management platform serving 600,000+ farms across 14M+ hectares. Cross-platform Flutter apps for field management, machinery tracking, and sensor integration.

2023 – 2026

Breakthrough · Senior Software Engineer

Owned the backend platform behind a white-label wellness app: 130+ partner creators, 60+ web paywall deployments across Firebase, AWS, and GCP.

  • AI semantic search: Firestore-triggered indexing, BigQuery dedup, Gemini-reranked vector search serving the apps in real time.
  • Multi-tenant Stripe billing backend on AWS ECS with webhooks offloaded to Lambda via SQS FIFO; subscriptions, lifetime purchases, and gifting across Connected Accounts.
  • Next.js Stripe web paywall serving 60+ partner brands from one codebase (Stripe Elements, Apple Pay, Google Pay, RevenueCat).

2021 – 2023

PixelApps · Senior Flutter Developer

Led mobile development and set engineering standards across frontend and backend.

  • Built the MVP and core API for WellTested.ai, the product that pivoted the company to a product business.
  • Co-designed Clean Architecture standards (Flutter + Riverpod) that cut production bug reports by 60%.

2022

Pingolearn · Expert Flutter Developer (contract)

AI language-learning app with 700,000+ users. Shipped the in-app subscription module (RevenueCat) and built the grammar detection engine on OpenAI's LLM for real-time speech feedback.

projects

Work projects live in the entries above; these are the ones where I also own the repo.

pglens: A simple, powerful PostgreSQL viewer: cross-platform daemon with schema visualization, multiple tabs, and Spotlight-style navigation.

Wallbay: Flutter wallpaper app with 114+ stars on GitHub and a Play Store release.

MinifyURL: URL shortener API with custom farmhash-based hashing, expiration, and visit tracking.

writing

First Token: my newsletter on AI and engineering, one useful idea at a time.

Medium: longer-form posts on Flutter, backend architecture, and things I broke in production.

nice things people said

One of the smartest engineers I have worked with, an executor who gets things done and can be trusted when the stakes are high.

Samyak Jain, Founder & CEO, PixelApps

An incredibly talented Flutter developer with a deep understanding of the technology, professional, and always willing to go the extra mile.

Mohit Menghani, Co-Founder, Lingopanda (formerly PingoLearn)