Manish Botta — building production AI & backend systems.

Built a local-first sourcing agent on a 13-node LangGraph workflow with a local Ollama LLM (qwen3:8b) and Langfuse tracing with PII redaction — full observability on every run.

Enforced a hard-coded URL-allowlist guardrail in code, before any browser tool runs — the agent can never touch login, apply, shortener, or non-allowlisted URLs.

Beat Google's CDP-layer bot detection — which defeated every Playwright / Puppeteer stealth variant — with a nodriver WebSocket-debug approach, backed by 55 passing tests and a deterministic query generator.

Built a probabilistic cricket simulation engine serving 256+ users and 444+ matches in production on OCI — resolves 120 deliveries per match in under 5 seconds.

~21K lines of Python: a 126-endpoint REST API, a 13-model SQLAlchemy schema, and a 7-layer Game State Momentum Engine with exponential decay over a 13-dimensional state vector.

Kept concurrent match state correct under load with per-match threading locks; 80%+ test coverage across a 6-config CI matrix. Shipped solo with session auth, Nginx, and zero-downtime deploys.

Built a full RAG pipeline with FAISS hybrid dense retrieval and cross-encoder re-ranking + a QLoRA-fine-tuned Llama — improved resume-to-JD match scores 45%.

Added RLHF-style preference re-ranking driven by live user feedback; deployed as autoscaling FastAPI microservices with 4-bit quantization (60% less GPU memory).

Constitutional AI self-critique loops for output quality control.

Built a 3-worker async pipeline over Redis queues that processes 1-hour meetings in 7–11 minutes, down from a 45–75 minute baseline.

Integrated Whisper + Gemini / GPT-4 via fully decoupled workers with idempotent retry logic — horizontal scaling needs no API or state-layer changes.

Prompt-engineered tool-call chains for structured entity extraction (action items, owners, deadlines); cut manual post-meeting review 80%.

Built a two-service backend (FastAPI identity service + dashboard) with cookie-based Argon2id authentication, role-gated admin APIs, and runtime-tunable per-IP and per-email rate limiting.

Designed a three-signal expired-job lifecycle across 10+ ATS providers — a state machine gated by two kill switches and per-ATS circuit breakers that fail closed.

Engineered safe data operations: idempotent URL-keyed UPSERTs, partial indexes, FTS5 search, atomic SQLite backups behind a multi-gate restore, and a tamper-evident admin audit log.