Summary
I build and run backend services and blockchain systems: APIs, databases, jobs, and smart contracts. Day-to-day stack includes TypeScript (Nest.js, Express), Go, Python, PostgreSQL, Redis, and MongoDB. On-chain work: Solidity, Rell (Chromia), subgraphs, and zero-knowledge tooling (e.g. Circom). I have led small teams and shipped production products in fintech-style and governance use cases.
Skills
Backend
- APIs and services: Nest.js, Express, Bun; REST and GraphQL
- Languages: TypeScript/JavaScript, Python, Go, Ruby
- Databases: PostgreSQL (query tuning, indexing), MongoDB, Redis
- Background jobs: Bull and similar queues
- Testing: unit and integration tests; TDD where it fits the team
Blockchain
- Smart contracts: Solidity; Rell on Chromia / Postchain
- Indexing: The Graph subgraphs
- Zero-knowledge: Circom circuits; Chromia ZKP extension
Delivery & platform
- Docker, Kubernetes
- CI/CD: Jenkins, GitLab CI, Bitbucket Pipelines
- Monitoring: Grafana, Prometheus, Elastic Stack
- AWS and typical cloud-native setups
Experience
Chromaway
Senior Blockchain Developer / Team Lead | April 2022 – present
- Led development of two on-chain products: Xoob and Chromia Governance (Rell, Solidity), including governance and security requirements.
- Backend: Nest.js, PostgreSQL, Go — services for production traffic, performance tuning, and reliability.
- Built zero-knowledge features with Circom and Chromia’s ZKP extension.
- Built social features with NFT-backed characters and on-chain relationships.
- Shipped a configurable DAO-style governance protocol: governance.chromia.dev
- Maintains the Postchain Python client on PyPI: postchain-client-py
Choz / Mina Foundation
Co-Founder, Tech Lead | September 2023 – June 2024
- Designed a privacy-oriented exam flow using zero-knowledge proofs, in collaboration with Mina Foundation.
- Backend: Express.js, Redis, Bull, MongoDB — APIs and job processing for the product.
- UML and written specs so the team and Mina Foundation stayed aligned.
- ETHGlobal Istanbul — 3rd place; grant from Mina Foundation.
- choz.io
LEXIT
Blockchain Lead Engineer | February 2022 – April 2022
- Smart contracts and overall architecture for dapps; Solidity.
- Documentation and diagrams to support the engineering team.
- Weekly status on outsourced work and delivery.
Melexsoft
Backend & Blockchain Developer | September 2021 – February 2022
- Backend: Ruby on Rails, GraphQL for NFT marketplace products.
- The Graph subgraph to index marketplace smart contracts.
- Solidity for the NFT marketplace contract layer.
Education
Computer Engineering
Istanbul University | 2022
High School Diploma
Karsiyaka Anatolian High School | 2017 | 96/100
Courses & certifications
- Machine Learning, Stanford University (Andrew Ng) | Feb 2021
- Cryptography, Coursera
- Advanced Mobile Programming, Ecodation, YTU Teknopark | July 2019
- English Camp, Southborne School of English | July 2013
Speaking & workshops
- Speaker, GETEK'23 (IEEE Istanbul University) — blockchain in tech.
- Workshop, Chainlink 2022 — Chainlink for subscription-style payments.