Deepesh Rathod

React · React Native · Node.js · self-taught full-stack foundation

• Lockdown-era full-stack self-study — React, React Native, Node.js, Express, REST API design.
• Built personal projects against real APIs (News API middleware, early dashboards) to develop production-style discipline.
• Early LLM-tooling adoption — used ChatGPT for SQL research workflows before that was the default move.
• Drafted the IPO framework (Input → Process → Data Context → Output) as personal engineering doctrine; later became the documented backbone for every blueprint at Zoca.

NestJS · AWS SES · CloudTrail · SQS · Slack API · transactional email

• Built NestJS servers integrating AWS SES, CloudTrail, SQS, and Slack API.
• Powered management-event logging and transactional email rendering for the Finmo product surface.
• First professional exposure to AWS as a managed-service substrate — the foundation for the AWS ownership that came two years later.

Python · Django · FFmpeg · real-time progress tracking

• Built backend APIs in Python / Django using FFmpeg for the VideoWiki video editor.
• Engineered a real-time progress tracking system for long-running FFmpeg tasks, improving editor UX for end users.
• First production exposure to long-running asynchronous workflows — a pattern that re-appeared at scale in the Lambda Swarm work two years later.

Python · Jinja · lemmatization · image classification · PostgreSQL · SQL triggers

• Built citation and NAP (Name / Address / Phone) consistency automation — delivered a 1-month scoped initiative in 1 week, freeing the founding team for higher-leverage work.
• Implemented lemmatization-based keyword matching to improve search relevance and recall across content surfaces.
• Built a dynamic website generation pipeline combining Jinja templates with image classification — automated per-business landing-page creation.
• Led a 1.5-hour Christmas-morning P0 (Dec 25, 2022) — production rescue of a deleted-row incident.
• Authored the SQL-Defined Business Triggers pattern (ADR-0006) — AFTER-DELETE audit triggers on every core table; zero silently-lost rows since.

Node.js · NestJS · AWS (Lambda, Step Functions, S3, ECS / Fargate) · PostgreSQL · 150GB media migration

• Spearheaded migration of the mobile-app backend from a legacy Python monolith to Node.js / NestJS services; established team-wide DevEx standards and shared utility tooling.
• Engineered a distributed media pipeline handling 1,000+ user uploads/day across 900+ GB of S3 with content-aware duplicate detection (0.1–5% reclaimed depending on user volume).
• Executed the 150GB media migration — 30-hour scripts, two mid-run crashes, pause/resume + caffeinate strategy, 0% data loss.
• Owned the Flask → Node migration with a client-side fallback safety net (ADR-0007); zero-failure cutover for live users.
• Drove SQL performance work: 15-minute query → 75 seconds via CTEs, composite indexes, deadlock resolution.
• Owned the entire AWS Cloud Infrastructure & DevOps after a senior-leadership transition — absorbed full infra ownership while keeping product delivery uninterrupted.
• Architected a hyper-local keyword demand system with 5-mile-radius geo-accuracy via US Census data integration.
• Designed and shipped Scheduling v1 end-to-end — slot algorithm, transaction blocks, entity snapshotting (the "Integrity Engine").
• Architected the $6M Lambda Swarm — hierarchical Step Functions + S3 JSON state; the Streamlit Revenue Opportunity engine that closed the $6M round. 2-hour batch → 5-minute pipeline (ADR-0009).
• Authored the Cynical Architect / Recovery-First doctrine (ADR-0010) and the PSQL Audit-by-Snapshot pattern (ADR-0011).

AWS ECS / Fargate · Terraform · Drizzle ORM · Redis · Stripe Connect · LLM infra · SOC2 / HIPAA · technical leadership

• Defined the foundational AWS ECS / Fargate stack that scaled the company from 90 → 1,500+ customers ($1M+ → $3.5M ARR) with 140+ headcount.
• Consolidated 3 servers + 50–60 Lambdas into 6 autoscaling services + 10 workers + 10 Lambdas; led a zero-failure migration of all legacy users.
• Designed tenant isolation + database-layer audit logging for SOC2 / HIPAA readiness across all tenant operations.
• Authored the Master-Worker pattern (ADR-0012) — Redis + NestJS workers + Lambda callbacks — and the LLM Guardrails safety layer (ADR-0013).
• Led the Drizzle ORM + Terraform IaC rollout for compliance-readable change management (ADR-0014).
• Built the Win Agent's deterministic LLM testing suite — invariants over examples, drift sentinels, replay cache (ADR-0015).
• Built an AI-native engineering toolchain (Claude Code + custom Metabase MCP server + AWS CLI) compressing RCAs from 2–3 hours to ~5 minutes — a 25–35× speedup that compounds across every incident.
• Senior Buddy for 4+ engineers; ran 20+ technical interviews; helped scale engineering from 2–3 → 15–18.
• Led the 5-Minute RCA on the Infra-Flip CI/CD seam; authored the System Wisdom vs Framework Knowledge doctrine (ADR-0016).
• Master Stroke (Feb 2026): shipped Scheduling & Payments v2 — Stripe Connect + tenant isolation across 1,500+ tenants + booking-item snapshots — in 30 days on $200/mo Claude Max with a small high-agency team.
• Built a local Slack PR Reviewer and an Agentic Docs Pipeline keeping ~80% of owned codebase docs in sync with commits — engineering-manager-as-builder responses.
• Authored the AI as Force Multiplier vs Liability doctrine (ADR-0017) — the Skills Paradox.