$18M+
Pintu Earn
Founding engineer for Pintu Earn: flexible earn ($18M+ AUM) and locked earn ($600K+ AUM).
I buildAI agentsfor the onchain economy.
Hi, I'm Harry Ermawan. Senior Software Engineer with 8+ years building production systems, 6 of them in blockchain since 2018. I build wallet, custody and settlement infrastructure for regulated crypto exchanges and stablecoin payments, and AI agents that automate blockchain operations. I specialize in taking financial products from zero to one and integrating them into the systems a business already runs on.
The toolbox is further down, give it a spin
The short version.
By the numbers
- 8+Years of experience
- 6Years in blockchain
- $18M+AUM on Pintu Earn
- 800+US stocks launched
~$70K/day
Swap aggregator
Architected the Pintu EVM swap aggregator and cross-chain swap, averaging ~$70K/day in swap volume.
Visa
Kite Crypto Card
Designed the end-to-end architecture for Kite Crypto Card, a stablecoin-backed Visa card now live on iOS and Android.
800+
Reku
Designed the Autosettlement architecture at Reku, built AI agents for blockchain operations and launched 800+ US stocks.
Local time in Bandung
UTC+7, working with teams across time zones
Community and open source
- 01Open-source contributor to ethereum.org: moved the tutorials to Sepolia for dApps and Hoodi for infrastructure.
- 02Co-founder of Web3 Dev Bandung.
- 03Speaker at Google Developer Group Medan, live-coding ERC-721 smart contracts.
- 04Founded the eFishery Engineering Blog, 2,000+ monthly readers.
Education
Bachelor of Computer Science
BINUS University, 2015 - 2019
Thesis: Implementation of Loyalty Points using Blockchain (Stellar Network) on B2B Marketplaces (Ralali.com).
Courses and Certifications
LangChain Academy, HackQuest, Udacity, 2016 - 2026
Deep Agents, Ambient Agents and Monitoring Production Agents (LangChain Academy, 2026). Solana Bootcamp (HackQuest, 2025). Blockchain Nanodegree (Udacity, 2021).
Where I've shipped.
Since 2018, across 6 teams
Jun 2026 - Oct 2026Jakarta, IndonesiaRemote
Senior Software Engineer @Reku
Crypto and US Stocks Exchange
- Designed and implemented the system architecture for Autosettlement, automating settlement operations end to end.
- Built AI agents for blockchain operations and AI workflows that automate processes across the product engineering team.
- Integrated and launched 800+ US stocks on the platform, expanding Reku beyond crypto.
- Go
- TypeScript
- AI Agents
Dec 2025 - Feb 2026Hong Kong SARRemote
Senior Software Engineer, Founding Engineer @Kite
Stablecoin Finance
- Designed the end-to-end architecture for Kite Crypto Card, a stablecoin-backed Visa card now live on iOS and Android.
- Built the non-custodial wallet with Dynamic.xyz, ZeroDev and ERC-4337 smart accounts, plus an EVM indexer on Alchemy for real-time balance and transaction tracking.
- Integrated card issuing and payment processing, connecting on-chain stablecoin funds to real-world spending.
- NestJS
- TypeScript
- ERC-4337
- Dynamic.xyz
- ZeroDev
- Alchemy
Oct 2021 - Nov 2025Jakarta, IndonesiaRemote
Software Engineer III @Pintu
OJK-regulated Crypto Exchange, Web3 Wallet and Earn
- Architected the EVM swap aggregator and cross-chain swap, averaging ~$70K/day in swap volume, with routing logic, gas estimation, slippage protection and transaction lifecycle management.
- Developed MPC-based Web3 wallets for tokens and NFTs, and blockchain services spanning custodial and non-custodial architectures.
- Founding engineer for Pintu Earn: architected flexible earn ($18M+ AUM) and locked earn ($600K+ AUM), and grew staking to 20% of total Earn AUM.
- Maintained Web3 systems serving ~8K daily unique users, and designed AI workflows that automated recurring engineering tasks.
- Go
- Node.js
- Fireblocks
- MPC
- PostgreSQL
- Redis
Jun 2019 - Sep 2021Bandung, IndonesiaRemote
Technical Lead, Supply Chain @eFishery
Aquaculture Unicorn
- Founding engineer for the Supply Chain, Lending and Marketplace business units, then tech lead.
- Reduced sales losses by ~60% with product-level price locking and a real-time price catalog.
- Cut service downtime by ~80% by moving business-unit data from the Sheets API to a relational database.
- Built offline-capable field apps capturing 25,000+ data points, and moved the API from a monolith to microservices with Domain-Driven Design.
- Go
- Node.js
- Python (Django)
- React
- GraphQL
- Docker
Mar 2019 - May 2019Jakarta, IndonesiaRemote
Software Engineer, Founding Engineer @Chipin Indonesia
Equity Crowdfunding
- Founding engineer managing two freelance engineers.
- Researched VeChain and Proof of Authority for tokenizing stocks.
- React
- Node.js
- Laravel
- Kubernetes
- Researched and implemented a blockchain-based loyalty point system on Stellar (SCP consensus), also my bachelor's thesis.
- Improved SEO traffic by 20% with dynamic URLs in search results.
- AngularJS
- React
- Node.js
- Laravel
Toolbox.
Drag to spin it, hover a planet, tap the core
- AI Engineering: Claude Code, Anthropic SDK, LangChain, LangGraph, MCP Servers, AI Agents, LangSmith
- Blockchain and Custody: EVM, Solana, ERC-4337, MPC, HSM, Multisig, Fireblocks, Solidity, Foundry, Swap Routing, Indexing
- Backend and Data: Go, TypeScript, NestJS, Node.js, Python, Rust, PostgreSQL, Redis, ClickHouse, Pub/Sub, gRPC, GraphQL
- Cloud and DevOps: Docker, Kubernetes, AWS, Google Cloud, GitHub Actions, Datadog, Grafana
Got an idea worth mining?
Most of what I build starts as a small spark: an AI agent with its own wallet, gasless onboarding, custody that signs in under a second. Click the bulb to mine one, and if it sparks something, let's build it together.
Go on, light it up
IDEA #000
Click the bulb to mine an idea.