KRISHNAKUMAR VALLIAPPAN
Software Engineer
Toronto, Canada | +1 (514) 980-6433 | krishnavalliappan02@gmail.com | https://www.krishnakumar.dev

SUMMARY
Software Engineer with 3+ years building end-to-end products across responsive web interfaces, APIs, AI workflows, and data systems using TypeScript, Vue, React, Python, FastAPI, Express, and SQL.

EXPERIENCE

Full-Stack Developer | IPAC Consulting | Canada
Jan 2025 - Present
- Built and shipped an AI-guided pricing assistant with FastAPI, Vue 3, SQLAlchemy, SSE, and structured LLM outputs, supporting 100+ sessions while reducing reliance on manual customer contact.
- Built a tenant-scoped document Q&A workflow using OpenAI file-search RAG, SSE streaming, company and site filters, and page-linked citations for uploaded PDFs.
- Shipped an embeddable iframe widget that gave external-site visitors responsive access to the assistant while preserving session context across visits.
- Built a full-stack image annotation system with Vue, Leaflet, Express, and Prisma, replacing a workflow that cross-referenced spreadsheets and image files.
- Built an interactive spatial data map that overlays live operational records on annotated layouts with filters, clustered markers, and drill-down details.
- Created a PDF.js and HTML Canvas viewer with lazy rendering for large documents and role-gated download and print controls.
- Reduced repeat API calls by about 30% on affected screens using localStorage caching with two-minute TTLs, namespaced keys, and mutation-triggered invalidation.
- Built an idempotent data ingestion pipeline that normalized external spreadsheet data into a relational quote cache and protected against stale-record overwrites.
- Implemented draft autosave and lifecycle workflows with debounced persistence, flush-on-exit, and server-authoritative transitions.
- Containerized FastAPI and Vue services with Docker Compose, Nginx, and Caddy; added Bitbucket checks for migrations, health tests, and frontend types before manual Coolify deployments.

Junior Developer | IA Flow Elements | India
Jan 2021 - Jul 2022
- Automated recurring AWS data synchronization with Python, removing manual execution from about 90% of scheduled runs.
- Built React dashboards with filtering and comparison views for operational data analysis.
- Rebuilt internal interfaces with Tailwind CSS to improve mobile responsiveness and standardize component styling.
- Resolved production issues across internal tools by tracing data and UI defects and shipping fixes with business stakeholders.

PROJECTS

JobScout | Open source
Job research and application tracking that extracts structured job data, drafts application materials with OpenAI, and syncs tracking with Notion.
Stack: Python, Selenium, OpenAI, Notion API
https://github.com/krishnavalliappan/JobScout

EDUCATION
Master of Engineering | Concordia University | 2022 - 2024 | Montreal, Canada

SKILLS
Languages: Python, TypeScript, JavaScript, SQL
Backend: FastAPI, Express.js, Node.js, REST APIs, Server-Sent Events, Pydantic, Prisma, SQLAlchemy
Frontend: Vue 3, React, Next.js, Pinia, Tailwind CSS, Leaflet, HTML5 Canvas
AI: OpenAI APIs, LLM workflow orchestration, Function calling, Structured outputs, RAG
Data and cloud: PostgreSQL, MySQL, SQLite, Docker, AWS, CI/CD, Nginx, Git