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Jagadeesh B

Full-stack & blockchain engineer

I take on-chain products from contract to production: Soroban and Cairo contracts, Go and TypeScript services, and the interfaces people use.

Jagadeesh B
Shipped on
  • Stellar
  • Starknet
  • Solana
  • Aptos
  • Midnight
  • Ethereum
  • Hedera
  • Flare
  • XRPL
  • Somnia
  • Creditcoin
  • Stacks
  • X Layer
  • Base
  • Decentraland

About

Remote, from Tamil Nadu

I'm the founder and sole full-time developer of Grainlify, a platform that funds open-source issues and pays contributors when their work merges. Since August 2026 I've been a Stellar India Ambassador. I'm based in Kallakurichi, Tamil Nadu, India, and I work remotely. Most of what I build is payment and settlement infrastructure: the contracts, the services around them, and the interfaces people use.

  • Kallakurichi, IN · IST (UTC+5:30)
  • Remote
  • Stellar India Ambassador

Featured

Projects I've shipped

Open any card for the full details and every link.

Grainlify website

Flagship

A funded open-source contribution platform. Maintainers fund issues, a published weighted draw assigns them, and contributors get paid when their work merges.

  • Stellar
  • Soroban
  • Aptos

Founder · sole full-time developer

Live at grainlify.com

Vickrey website

Aug 2026

Sealed-bid second-price auctions on Starknet where the losing bids are never published.

  • Starknet
  • Cairo

Built for the STRK20 Private Sprint (Starknet)

Contracts live on Starknet mainnet

Roundlot website

Sep 2026

Pay-per-call MCP and REST tools for tokenized US equities on X Layer, paid with x402.

  • X Layer
  • x402

Built for OKX Dev Day 2026

X Layer mainnet data · testnet payments

Turnpike website

Aug 2026

An open-source x402 payment facilitator for Stellar. Sellers charge per request without running chain infrastructure.

  • Stellar
  • x402

Built for Stellar Community Fund #45 (RFP track)

Stellar testnet

Uncross website

Sep 2026

A periodic call auction on Solana that fills everyone trading a thin tokenized stock at one price.

  • Solana
  • Anchor

Built for the Stocklana hackathon (Solana Foundation)

Solana devnet

Trellis website

Sep 2026

A Decentraland World its visitors build together, one placement a day.

  • Decentraland
  • SDK7

Built for the Decentraland Friendzone Mobile Buildathon

Decentraland World trellis.dcl.eth

$ npm i @tollgatehq/sdk

Sep 2026

AI agents find data services by ENS name and pay per call over x402 in HBAR, with data from The Graph.

  • ENS
  • Hedera
  • The Graph

Built for ETHOnline 2026

Sepolia + Hedera testnet

Absentia website

Sep 2026

Zero-knowledge sanctions screening on Midnight. It proves an identity is not on a list without revealing the identity.

  • Midnight
  • Compact

Built for the AKINDO Midnight Buildathon (Wave 1)

More

More projects

Newest first.

  • saucerswap-limit-orders

    Sep 2026

    Keeperless limit and stop-loss orders on SaucerSwap V2, run by the Hedera Schedule Service.

    • Hedera

    Built on Hedera

  • memokit

    Sep 2026

    Sign one XRPL payment, and your Flare account runs the calls you committed to.

    • Flare
    • XRPL

    Built for a Flare Foundation grant application

  • Grainlify Bounty Agent

    Sep 2026

    Funds open-source work from creator fees and pays for its own inference over x402.

    • Solana
    • x402

    Built for AnsemHack Clawrena

  • Metacenter

    Sep 2026

    A risk feed for Stacks Bitcoin Staking (PoX-5): coverage, reserve, yield and stress tests.

    • Stacks
    • Clarity

    Built for the Stacks Endowment Q3 2026 grant application

  • Retainer

    Sep 2026

    Recurring USDC billing on Base spend permissions that never holds the money.

    • Base

    Built for the Base Batches 004 application

  • Tollbooth

    Sep 2026

    A paywall layer for MCP servers. An agent calls a paid tool, a human pays, the agent retries.

    • MCP
    • Moove

    Built for the Moove Developer Program

  • Arrears

    Sep 2026

    A Creditcoin contract that treats a failed Ethereum transaction as evidence against a bonded operator.

    • Creditcoin
    • EVM

    Built for BUIDL CTC 2026 Fall (Creditcoin)

  • Ballast

    Sep 2026

    Parametric downside cover on dreamDEX, bought by the chain itself in the same block a window opens.

    • Somnia

    Built for the Somnia × dreamDEX Event Contracts Hackathon

  • Stellopay

    2025 – 2026

    Decentralized payroll and escrow on Stellar and Starknet.

    • Stellar
    • Starknet

    Contributor

Experience

Where I've worked

  1. 03/2026 — present

    Freelance Full-Stack Developer

    Stellar Ecosystem Projects · Remote

    • Build and maintain production full-stack applications with React, Next.js, TypeScript, Node.js, Go and Python: interfaces, backend services, APIs and integrations.
    • Design REST APIs, microservices, database schemas, background jobs and event-driven systems on PostgreSQL, Redis and message queues.
  2. 12/2025 — 02/2026

    Full Stack Developer

    Caddy Finance · Remote / Singapore

    • Built responsive React and TypeScript interfaces, and backend APIs in Node.js and NestJS for financial applications.
    • Integrated the frontend with blockchain services (Starknet, Solana) and backend systems.
  3. 01/2023 — 11/2025

    Software Developer

    Velocix · Chennai, Tamil Nadu

    • Designed and built backend microservices in Rust and Node.js for large-scale video delivery and content distribution.
    • Ran containerized deployments with Docker and Kubernetes on AWS and OpenStack, and worked on CI/CD automation and monitoring.
    • Received Velocix's Rockstar Award for backend performance optimization and automation tooling.

Skills

What I work with

Chains6 families

  • Stellar / Soroban
  • Starknet / Cairo
  • Aptos / Move
  • Solana
  • Midnight / Compact
  • EVM

Languages

  • Go
  • Rust
  • TypeScript

Frontend

  • React
  • Next.js
  • Tailwind

Cloud / DevOps

  • AWS
  • GCP
  • Terraform
  • Ansible
  • Vercel
  • Railway
  • Neon Postgres

AI

  • LLM fine-tuning
  • LoRA
  • QLoRA
  • Instruction tuning