Hi, I'm Saidul Badhon. I'm a senior software engineer who builds AI products end to end, from the interface to the infrastructure.

Full Stack Engineer & Project Manager

Jutsu•San Francisco, California, United States • Remote

Lead a small engineering team at Jutsu while staying hands-on in the code, owning delivery from product planning and sprints through architecture, code review and release.

• Lead engineer on Jutsu's AI security operations platform, working across the OCSF ingest pipeline into ClickHouse, the multi-tenant API, Sigma detections and the AI agents that triage alerts and write investigations.
• Lead engineering and product for Postt.ai, an AI content platform that drafts and schedules LinkedIn and X posts in each founder's voice, and wrote most of its API and AI agent service.
• Led the rebuild of Stella, the Stellar Development Foundation's AI assistant for developers on Discord, Telegram and developers.stellar.org, and built most of AgentRel, a platform for AI assistants grounded in a product's docs.
• Plan sprints, scope features and review code for the team, turning product strategy into shipped releases.

• TypeScript
• React
• Bun
• Hono
• ClickHouse
• MongoDB
• Vercel AI SDK
• Qdrant
• Kubernetes

Case studies:JutsuPostt.aiStellaAgentRel

Full Stack Engineer

Jutsu•San Francisco, California, United States

Helped move Jutsu from Web3 developer tools to AI products, shipping across the front end, back end and data infrastructure.

• Led development of Jutsu IDE, a browser IDE for NEAR with a live preview, real-time co-editing, GitHub sync and JutsuGPT, an AI copilot on OpenAI and Anthropic models.
• Built the official app for NEARCON 2023 in Lisbon, NEAR's flagship conference: ticketing and check-in, an NCON token wallet, and swag and food purchases for around 3,000 attendees.
• Led the React and TypeScript front end of Jutsu Workspace, one app for more than 25 AI models with shared chats, a versioned prompt library, knowledge bases and team billing.
• Implemented a vector database for knowledge-base search, grounding AI answers in a team's own documents.
• Built big data processing systems to support small language models (SLMs).

• TypeScript
• React
• Node.js
• Express
• MongoDB
• PostgreSQL
• pgvector
• NEAR Protocol

Case studies:Jutsu IDENEARCON 2023 Ticketing SystemJutsu Workspace

Software Engineer Intern

Jutsu•San Francisco, California, United States • Remote

Joined as a front-end intern and quickly grew into a full-stack role.

• Helped build Jutsu IDE, a Web3 IDE for building and publishing NEAR apps in the browser.
• Worked across React front ends and Node.js, Express and MongoDB services, shipping features end to end.

• JavaScript
• React
• Node.js
• Express
• MongoDB
• NEAR Protocol

Case studies:Jutsu IDE

Founder & CEO

Dokan.gg•Dhaka, Bangladesh • Hybrid

Founded Dokan.gg, a multi-vendor marketplace that lets any business in Bangladesh open an online store without building its own website. Lead the product, engineering and business operations.

• Shipped the first platform (2023–2024): a Next.js storefront, an Express API on AWS Lambda and a React seller app.
• Rebuilt it from scratch in 2026 as a TypeScript monorepo: a Bun and Hono API over MongoDB, a Next.js storefront and a Next.js seller and admin dashboard.
• Designed one checkout across many stores, splitting each basket into an order per store, with card or cash-on-delivery payment, courier tracking, returns and seller payouts.
• Manage business operations, product direction and team coordination.

• TypeScript
• Next.js
• React
• Bun
• Hono
• MongoDB
• AWS Lambda
• Playwright

Case studies:Dokan.gg

Frontend Web Developer Intern

CyStellar•London, United Kingdom • Remote

Front-end intern at CyStellar, a space-tech company whose platform turns satellite data into risk insights for insurers and public agencies.

• Built data-driven dashboards for CyStellar's internal risk platform, turning geospatial and environmental data into interactive maps and charts with Mapbox GL and D3.js.
• Worked on CyStellar's project for Bilbao City Council, through the EU's REACH incubator: a dashboard forecasting emergencies 15 days ahead to help size and deploy the city's firefighter teams.
• Trained machine learning models to classify the roof materials of houses across Europe from satellite imagery.

• JavaScript
• React
• D3.js
• Mapbox GL
• Python
• Machine learning

Case studies:CyStellar

Freelance Web Developer

Fiverr•Remote

Freelance web developer for clients on Fiverr, starting with front-end work and growing into full-stack projects.

• Completed 65 orders for 39 clients, 11 of whom came back for more, rated 5.0 from 44 reviews.
• Built modern, responsive websites, landing pages and portfolios for small businesses.
• Delivered full-stack web apps with React, Node.js and MongoDB, owning both the client and the server.
• Built cross-platform mobile apps in React Native and Expo, including Zodi World, an astrology app.
• Ran each project end to end, from scoping requirements with the client through delivery and revisions.

• JavaScript
• React
• Next.js
• React Native
• Node.js
• MongoDB
• HTML
• CSS

Case studies:Zodi World

Fiverr work history

Frontend Developer

Cryptosynk LLC•San Francisco Bay Area • Remote

Front-end developer on Cryptosynk's websites and web products.

• Built modern, responsive websites and landing pages.
• Worked with designers and back-end developers to turn designs into fast, user-friendly interfaces.
• Improved the design and performance of the company's web products.

• JavaScript
• React
• HTML
• CSS

Founder & Content Creator

TechSecBD•Bangladesh

Founded and ran TechSecBD, a YouTube channel teaching technology, programming and cybersecurity.

• Planned, produced and published educational videos on programming and cybersecurity for a growing audience.