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I build things and share what I learn along the way.

Hey, I'm Deepak. I love exploring the unconventional, tackling problems the hard way, and diving deep into what fascinates me. Lately that means building with AI: voice agents that answer a business's phone, LLM assistants that reason over real data, and the tracing that makes them trustworthy in production. The best part of this craft? We get to command machines to do remarkable things, and now they talk back.

Experience & Education

Customer Centric Engineer

Full-time
Sep 2026 - Present
Remote
IntegrationAutomationCustomer Engineering

Senior Software Engineer

Contract
Apr 2026 - Sep 2026
Remote
B2B Puerto Rico logo
ClientB2B Puerto Rico
Slice360 logo
ProductSlice360
  • Bootstrapped the Slice360 backend (Node.js, Express, TypeScript, PostgreSQL) for B2B's merchant platform, from scaffold to production on Railway.
  • Built a voice-to-voice AI customer assistant: merchants provision an ElevenLabs conversational agent on their own phone number, and post-call webhooks feed transcripts, call analysis and FAQ knowledge back into the app.
  • Shipped "Ask Slice", an in-app assistant on Gemini that routes questions to per-domain agents (analytics, website, capital, batches) and answers only from the merchant's own data, with Langfuse for prompt management and tracing.
  • Built the Clover and Valor POS integrations: multi-account connections, a scheduled sync engine with retry handling, and live sales, item, category, customer and employee analytics.
  • Integrated Salesforce two ways: mirrored batch reports, capital advances and support cases into Postgres, and drove tech-call scheduling off Salesforce free/busy calendars.
  • Designed the v2 merchant capital offer engine as a state machine and shipped the React PWA features on top: phone-OTP login, multi-tenant merchant switching, device-aware sessions and Intercom support.
Node.jsTypeScriptPostgreSQLReactElevenLabsLangfuseGeminiSalesforceClover API

Senior Software Engineer

Contract
Jan 2025 - Apr 2026
Remote
  • Built a new "Admissions" application for ReadyTech's EdTech platform.
  • Integrated functionality from their legacy 15-year-old Rails application into the new system.
  • Contributed to both the new repo and the existing legacy codebase simultaneously.
Ruby on RailsNext.jsReactPostgreSQL

Founding Engineer

Full-time
Oct 2024 - Nov 2026
Famaash
United States · Remote
  • Building an MVP for payroll, expense management and everything a film production company needs.
  • Sole engineer responsible for the entire backend stack.
Ruby on RailsPostgreSQLSystem Design

Senior Software Engineer

Contract
Apr 2023 - Oct 2024
  • Optimized wholesale checkout process to improve user experience and operational efficiency.
  • Optimized core GraphQL search query, cutting response time from 20 seconds to 2 seconds.
  • Managed transfer of Emerson Ecologies' data to newly developed app with robust error handling.
  • Wrote optimized SQL queries for data migration, reducing time from 1 hour to 5 minutes.
Ruby on RailsGraphQLPostgreSQLReact

Senior Software Engineer

Contract
Jun 2022 - Apr 2023
  • Spearheaded integration of third-party APIs and Spree engine customization, resulting in 15% increase in average order value.
  • Enhanced application performance by 30% through code refactoring and database optimization.
Ruby on RailsSpree CommerceAPI Integration

Tech Lead

Full-time
Jan 2021 - Jun 2022
Pune, India
  • Developed Ruby on Rails app enhancing US doctors' licensing processes with 40% rise in B2B applications.
  • Cut memory usage by ~45% through improved coding practices and algorithm optimization.
  • Built course recommendation feature using binary tree data structure for efficient searching.
  • Designed multi-tenant rules engine USP, instrumental in attracting new clients.
  • Practiced TDD and increased test coverage by 70%.
  • Facilitated code reviews and participated in daily stand-ups, sprint planning.
Ruby on RailsPostgreSQLTDDSystem Design

System Engineer

Full-time
Jun 2019 - Jan 2021
Pune, India
  • Completed internship working on internal projects using C#, Python, and Ruby.
C#PythonRuby

Bachelor's in Computer Science & Engineering

Jul 2015 - Jul 2019
A.P.J. Abdul Kalam Technical University

Work with me

I take on contract work as an independent engineer, usually as the person who owns the backend and the AI layer end to end. Recent engagements covered voice agents on ElevenLabs, LLM assistants on Gemini and Claude with Langfuse tracing, POS and Salesforce integrations, and Rails and Node platforms that had to scale.

If you have a product that needs that kind of depth, or an AI feature that has to work in production rather than in a demo, get in touch.

Business details

GSTIN
09BYTPC0935J1Z3
Legal name
Deepak Chauhan
Entity
Proprietorship
Type
Regular taxpayer
Registered
21 Nov 2022 · Active
State
Uttar Pradesh (09) · Kanpur

Contract work is invoiced under this GSTIN. Registered address available on request.

Featured Projects

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KhataTrack

AI-powered financial management for Indian businesses. Bank statement analysis, automatic categorization, and GST-compliant invoicing.

AI/MLFintechSaaS

LensLedger

MVP for film production companies—payroll, expense management, and more. Sole engineer on the backend.

Ruby on RailsPostgreSQLSystem Design

GitHub Activity

Deepak's GitHub contribution chart

Recent Writings

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