AI evaluation & backend engineer
I find where AI breaks,
and build the products it runs in.
I audit AI datasets and benchmarks, fine-tune and test models, and write the TypeScript backends behind AI products. Five years of shipping software people use.
Open to opportunities / Jakarta, Indonesia
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Three projects, built in 3D. Scroll to play them.
Flur · AI product
Horizon · AI evaluation
Bitzaro · Payments
Selected work
What I build, the problems it solves,
and the engineering behind it.
Browse more projects ↓
From a floorplan to a furnished space.
Hotels and retail teams need to visualise interiors using real furniture collections. Flur turns 2D floorplans into furnished interiors and 360° panoramas.
My contribution: Building the floorplan understanding pipeline, synthetic datasets, vision-model fine-tuning, golden-fixture evaluations, and rendering workflow.
Find the broken tasks before a lab does.
AI labs buy task datasets and training environments to test and train their models. Some of those tasks cannot be solved. Some graders give full marks to wrong answers. Some environments fail to start. Each of these makes the score wrong.
My contribution: Building the audit tool behind Horizon’s public quality index. It runs every task in a clean container, submits an empty answer and the supplied solution, and challenges the grader with incomplete work. Every finding links to its proof. Our audit of public datasets from major vendors confirmed 29 broken tasks.
I also design long-horizon coding benchmarks. Their tasks are generated by code, and a script grades every answer exactly.
Crypto from many chains, spent like cash.
Bitzaro is a crypto wallet with a Visa card. People load USDT into the wallet and pay by card at more than 40 million shops. Businesses use the same platform to accept crypto payments.
My contribution: I’m the top contributor to the multi-chain listener. It watches about ten blockchains, including Bitcoin, Ethereum, Tron and Solana. It records deposits, updates balances and sends withdrawals. I also wrote the Tron batch-transfer smart contracts, and I’m leading the rebuild of the platform’s API and admin backoffice.
Exchange speed, without giving up your keys.
Mach1 is a spot trading platform built with Horizon Analytics Labs. Traders connect a wallet, watch live charts and the order book, and place orders. Its site lists more than 200,000 orders per second and under 100 ms latency.
My contribution: I built trading features in the web app: order history and open orders, limit-order sizing, the swap widget’s order book, the test-token faucet and the wallet connection flow.
Japanese sake and pro basketball, sold as NFTs.
Sakeworld lets people buy Japanese sake as an NFT and keep it aging in storage. A second marketplace sold NFTs for a Japanese basketball team. Buyers could pay with a crypto wallet or a credit card.
My contribution: I led the blockchain work at YCP Solidiance: credit-card payments for packs and NFTs, wallet payouts for rights holders, a market-maker integration, and ERC721A contracts that lower gas fees.
Across AI, Web3 and infrastructure
Trading bots that work across several decentralised exchanges, with execution strategies and risk management.
The first metaverse project on the Astar blockchain, with custom RPC services, smart contracts and wallet integration across platforms.
Internal AI tooling with self-hosted Qwen and Gemma models and agents that automate code reviews, documentation and deployments.
Qwen and Gemma models fine-tuned on internal data and run on local machines, including Apple Silicon. They power agents in engineering and trading work, with an evaluation loop that keeps improving them.
Experience
Jun 2024 - Present
AI Evaluation & Backend Engineer
Audits of AI datasets and training environments, long-horizon coding benchmarks, AI products, and trading systems with outage recovery across six venues.
Jun 2024 - Present
Backend & blockchain developer
Multi-chain deposit and withdrawal listener, Tron batch-transfer contracts, and the rebuild of the platform’s API and backoffice.
Nov 2023 - Jan 2025
Backend Developer · JavaScript / TypeScript
WebSocket synchronisation, missed-event recovery, an ownership verification API, and a GraphQL event indexer.
Apr 2022 - Apr 2024
Blockchain Backend Developer
Worked with the CTO on a metaverse backend, custom RPC services, smart contracts, and cross-platform wallet integration.
Feb 2022 - Jan 2023
Blockchain Expert
Marketplace integrations for credit-card purchases, wallet payments, and trading, working with clients and third-party vendors.
Jun 2021 - May 2023
Blockchain Developer
DAO applications, multi-chain marketplaces, swap integration, and smart contract rules.
About & tools
I’m a software engineer based in South Jakarta. My work spans AI evaluation, AI products, backend systems, and blockchain integrations.
I enjoy working close to the product: understanding the requirement, discussing trade-offs, and building the pieces needed to deliver it. My recent work combines that with a focus on evaluating AI behaviour.
Brawijaya University
B.Eng, Computer Science · 2017 - 2021
1st place · UNITY2019 Software Development Competition
Let’s talk
I’m open to AI evaluation, AI product and backend engineering roles.
irfanmaulanaaaaa.im@gmail.com