Kalvin Chakma
A developer dedicated to building reliable, scalable, and user-friendly software. Aware of the limits of my knowledge, I strive to grow through continuous learning and refine my technical skills.

EDUCATION

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Ahsanullah University of Science and Technology

Bachelor of Science in Computer Science and Engineering

2022–Present

TECHNICAL SKILLS

RESUME

Resume

PROJECTS

EventRelay screenshot

EventRelay

Self-hosted outbound webhook delivery service. Signs, guards, retries, and logs every event so a flaky third-party endpoint never becomes your on-call problem.

• Built a self-hosted event delivery pipeline: validate → sign → deliver → retry → dead-letter → resend.

• Implemented an SSRF guard and request signing to secure outbound webhook delivery.

• Used BullMQ + Redis for exponential-backoff retries and Postgres (Drizzle ORM) for durable delivery logs.

• Structured as a Turborepo monorepo (Hono API, Next.js dashboard, background worker) with no vendor lock-in.

Next.jsNext.jsPostgreSQLPostgreSQLTailwind CSSTailwind CSSTurborepoTurborepoDockerDocker
Draw App screenshot

Draw App

Real-time collaborative whiteboard inspired by Excalidraw and tldraw. Multi-tool canvas with rooms, live sync, and shareable view-only links.

• Built a multi-tool canvas — pencil, rectangle, circle, line, triangle, and text — with dashed/arrow line variants and partial erase, synced live over WebSockets.

• Designed a room system with JWT-authenticated dashboards, per-room canvas persistence (Prisma/Postgres), and admin-only room deletion.

• Added shareable, read-only view links (view tokens) so a board can be shared without granting edit access.

• Structured as a Turborepo monorepo separating the Next.js client, an Express HTTP API, and a dedicated WebSocket backend.

Next.jsNext.jsExpressExpressTailwind CSSTailwind CSSTurborepoTurborepoPrismaPrismaPostgreSQLPostgreSQL
Scripture screenshot

Scripture

Note-taking app with three editor modes — block-based rich text, Markdown, and to-do lists — with JWT and Google OAuth authentication.

• Built three distinct note editors: a BlockNote block-based rich-text editor, a Markdown editor, and a checklist/to-do editor.

• Implemented authentication with both JWT + bcrypt-hashed passwords and Google OAuth via Passport.js.

• Used Zustand for client state management across note views and user session data.

• Structured as a monorepo with an Express + MongoDB API and a Vite/React frontend, deployed separately to Render and Vercel.

ReactReactExpressExpressTailwind CSSTailwind CSSMongoDBMongoDB
MovieApp screenshot

MovieApp

TMDB-powered movie & TV discovery app with dedicated trending, popular, top-rated, and cast/people browsing.

• Built dedicated Movies, TV Shows, Trending, Popular, Top Rated, and People sections backed by the TMDB API via Axios.

• Implemented a details page with trailer playback in a modal, plus a cast/person page linking to each person's filmography.

• Added infinite scroll and genre-based search/filtering, animated with Framer Motion.

ReactReactTailwind CSSTailwind CSS
© 2026 kalvin