KONA Software Lab, Dhaka
Zakaria Hossain FoysalSenior Software Engineer
I build AI agents for banking and mobile-wallet products, and the tool servers, approval flow and evals around them. Before that I worked on a Hyperledger Fabric commerce platform.
Dhaka, Bangladesh
11 case studies
Work
11 case studies
- Agentic AI5
- Payments and ledgers3
- Personal and open source3
- 01KONA
AI assistant for the card management system
In active development - 02KONA
MCP tool servers for the card system
In active development - 03KONA
Guardrails and evals for the agents
In active development - 04Nagad
KON-AI: assistant in the Nagad app
Integrated into the Nagad app and in testing - 05KONA
Self-hosted LLMs and a card-spec RAG
In use by the agent services and the card personalization team - 06KONA I
Tag Explorer: fund tracing for a card system
In production - 07KONA
Reporting and data for the card platform
Built for KONA's card management system - 08KONA I
NCP: commerce platform on Hyperledger Fabric
Live for KONA I in Korea - 09Personal
NID card OCR for KYC
Working REST API and command-line tools - 10Personal
Hisaab: personal finance app
In progress, early stage - 11Open source
whichllm: benchmark scraper fix
Merged on 10 June 2026
The approval flow
- Propose
- Approve
- Commit
The agent drafts a change. A person approves it. The approval works once.
2017 to now
Experience
2025 – now
Senior Software Engineer, KONA Software Lab
The agentic AI layer of a card management system and the Nagad app, the self-hosted LLM stack under it, and fund tracing for KONA I.
2022 – 2024
Software Engineer, Level 2, KONA Software Lab
Top contributor to NCP, a token-backed commerce platform on Hyperledger Fabric, that runs for KONA I in Korea.
2021 – 2022
Software Engineer, BJIT
Hyperledger Fabric R&D in Go and Spring Boot, and an Ethereum courier dApp.
2017 – 2021
B.Sc. in CSE, Daffodil International University
Competitive programming on Codeforces, ICPC Dhaka Regional 2018, and 1st place at the DIU programming contest in 2019.
Articles and merged fixes
Open source and writing
Fixed whichllm's benchmark scraper
Parsed the Next.js RSC stream and made live data overlay the fallback, so a fetch can only add models. Chosen over a competing fix.
I tried running RAGFlow on an Apple M5 Mac
What happened when I ran an open-source RAG engine on Apple Silicon.
HSM integration with the Fabric Java SDK
Keeping blockchain identities inside a hardware security module.
Contact
Happy to talk about agents, MCP or payment systems.
zakariahossain20@gmail.com