Software Engineer fueled by caffeine, building backends & APIs with scalable systems.
Freelance software for RankYodha, SpunTech Industries, and BHIMS VENTURES. Explore my client work →
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archbtw
archbtwExperience
Backend engineering and freelance client work
MegaLLM
Backend Engineer
- Payments processed
- $15K+
- Transactions
- 1,500+
- L0 cache hit rate
- >95%
- Hot-path latency
- 2–4 ms
- Sole engineer on the MegaLLM backend — a production OpenAI/Anthropic-compatible API gateway in front of 70+ LLMs on Hono + Bun + TypeScript with MongoDB, Redis, Kafka, and ClickHouse.
- Designed a 3-tier cache (in-memory LRU → Redis → MongoDB) hitting >95% L0 hit rate at ~2–4ms, plus intelligent model routing with a MobileBERT classifier and 429/5xx fallback chains.
- Shipped Stripe + Razorpay + OxaPay billing with idempotent webhooks, organization wallets, and ClickHouse credit-event streaming for usage correlation.
- Hardened the platform with JWT + Redis blacklist, prefix-lookup API keys, 3-tier admin RBAC, and full Prometheus/OpenTelemetry/Grafana Loki observability.
RankYodha
Full-Stack Engineer · Freelance
- Google Play downloads
- 1K+
- Store rating
- 4.9/5
- Ratings
- 67
- Built a real-time JEE/NEET exam platform across Next.js, React Native, and NestJS, connecting student practice, mock tests, notes, and a dedicated mentor/admin console.
- Engineered resumable exams and paid access with serialized answer autosave, server-enforced deadlines, versioned scoring, Razorpay webhooks, and Redis entitlement caching.
- Developed a distributed live-quiz engine with Socket.IO and Redis leader election, plus a MinerU/BullMQ pipeline that turns exam PDFs into reviewable question drafts.
SpunTech Industries
Full-Stack Engineer · Freelance
- Built an AI-powered manufacturing platform on Azure with FastAPI, PostgreSQL, and React, connecting order intake, inventory, shop-floor production, wages, and dispatch.
- Engineered OR-Tools CP-SAT optimization for worker/machine scheduling and container loading, handling placement constraints while preserving original cargo.
- Integrated Azure OpenAI document extraction and natural-language database queries, turning purchase orders into structured drafts and exposing guarded, read-only factory insights.
- Delivered offline shop-floor capture with Dexie and idempotent sync, append-only operational ledgers, and automated drawings, packing documents, and desktop printer integration.
BHIMS VENTURES
Full-Stack Engineer · Freelance
- Built and published a connected fitness app in React Native with AI fitness guidance, Android Health Connect, and workout tracking, backed by Next.js, tRPC, and PostgreSQL.
- Integrated mobile-to-hardware access control with eSSL X990 devices, expiring entry commands, atomic claiming, and attendance synchronization.
- Engineered Razorpay billing and loyalty infrastructure with idempotent payment/refund workflows, durable reconciliation, and transactional reward ledgers.
- Delivered a unified club operations console for memberships, café orders, nutrition inventory, and attendance, secured by device-bound member sessions and role-based staff access.
Surf
Co-Founder & Chief AI Engineer
- Co-founded and engineered an AI-powered meeting platform with real-time transcription and multilingual translation
- Designed low-latency AI services using Python, FastAPI, and WebSockets for real-time audio streaming
- Improved transcription stability through streaming optimizations and async processing pipelines
Featured Projects
Independent builds and award-winning hackathon projects
Protego: AI-Powered Personal Safety Platform
Won 1st Position at the Govt. Pre Sabka AI Hackathon for a full-stack safety platform with real-time GPS tracking, AI distress detection, and a covert duress-password flow
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Sonorous: Real-Time ISL Accessibility Layer
Built at the HackHelix hackathon: real-time Indian Sign Language layer for audio calls. Speech becomes a signing 3D avatar, and signs go back the other way as speech
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Gateway Discord Bot
Comprehensive Discord bot with music playback and advanced moderation
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Skills
Technologies and tools I work with
Languages
Databases
Backend
Frontend
Mobile & Optimization
Cloud & DevOps
Observability
Core CS
Tools
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Let's Work Together
Have a project in mind or just want to chat? I'm always open to discussing new opportunities and ideas.