$ whoami
Sanjay Subramanian
Backend + AI engineer @ Waterloo
Bachelor of Mathematics in AI, Minor in Computer Science · University of Waterloo · Expected April 2029
// experience
Software Developer @ Macaca AI
Aug 2026 – Present
Remote
- Designed async job pipelines on Redis Streams with retry, backoff, and dead-letter queues to isolate slow providers.
- Extended a RAG pipeline that chunks and embeds uploaded documents into Qdrant for per-tenant knowledge retrieval.
Software Engineering Intern @ U Plus
Jan 2026 – Apr 2026
Richmond Hill, ON
- Rebuilt the payment flow in React/TypeScript, boosting checkout conversion by 11% and cutting completion time by 35%.
- Right-sized EC2 instances and added request-driven auto-scaling, cutting monthly cloud costs by $3,800.
Software Engineering Intern @ Mercury Inc
May 2025 – Aug 2025
Remote
- Deferred non-critical scripts and lazy-loaded checkout images, improving LCP by 210ms and bounce rate by 12%.
- Wrote 180+ Jest and React Testing Library tests for the checkout flow, raising coverage from 41% to 85%.
Software Engineering Intern @ Terre Sky
Jan 2025 – Apr 2025
Remote
- Wrote modular Terraform scripts to provision all AWS infrastructure, cutting staging setup from 1 hour to 5 minutes.
- Engineered a Rust data ingestion service processing 5,000+ events/second at sub-10ms latency.
// projects
Offline Voice Assistant
Jan 2026- Event-driven pipeline with asyncio queues, achieving under 800ms end-to-end latency.
- Runs fully offline with faster-whisper for speech-to-text and Llama 3.2 via Ollama — no API costs.
- Python
- faster-whisper
- Ollama
- asyncio
Personal Finance Tracker
Sep 2025- Full CRUD with AG Grid editable tables and real-time validation, cutting data entry errors by 25%.
- JWT auth with bcrypt hashing for 100+ accounts with row-level data isolation.
- React
- TypeScript
- FastAPI
- PostgreSQL
- Docker
// skills
- Languages
- Python
- Go
- C
- C++
- SQL
- JavaScript
- TypeScript
- HTML/CSS
- Frameworks
- React
- Next.js
- Node.js
- Flask
- FastAPI
- GraphQL
- Ant Design
- Tools
- Git
- Docker
- Kubernetes
- AWS
- Terraform
- Redis
- GitHub Actions
- Libraries
- pandas
- NumPy
- Matplotlib
- LangGraph
- CrewAI
- Jest
- React Testing Library
- Certifications
- AWS Cloud Practitioner
- AWS AI Practitioner
- OCP Java SE 11
// contact
Open to internships and new-grad roles. The fastest way to reach me is email.