Blockchain & Web3
On-chain systems where trust and proof actually matter.
How we help
We use blockchain when you need a record nobody can quietly change: verifiable voting, payments and digital ownership. We build the contracts and the apps people use to reach them, with a sharp focus on security and user experience.
o9Tech is a product engineering studio in Lahore, Pakistan, founded in 2022. We work with clients around the world.
- Smart contracts in Solidity and Rust
- Wallet and payment flows in mobile apps
- On-chain audit trails and proof of results
- Integration with Ethereum, Solana, Polygon and BSV
- Security reviews and test coverage for contracts
What clients say about this work
o9Tech was reliable, thoughtful, and easy to work with. They handled complex requirements carefully, communicated clearly, and were responsive throughout the engagement. They approached problems methodically, followed instructions well, and demonstrated good judgment when dealing with non-trivial technical constraints. I would be comfortable working with them again and recommend them for projects that require attention to detail, discretion, and a disciplined engineering mindset.
Jan 2026 · Upwork
A clear plan, weekly builds, no surprises.
- 01
Discover
We learn your goals, users and constraints, then agree on scope, platforms and a realistic timeline. You get a written plan, not a guess.
- 02
Design & architect
We map the screens and the system behind them: data models, APIs and the stack that fits. Big decisions get made early and on paper.
- 03
Build in sprints
Working builds every week on TestFlight, Play internal testing or a staging URL. You see real progress and steer as we go.
- 04
Launch & scale
We handle store submission, monitoring and the first rounds of fixes, then stay on to grow the product with you.
When does a product really need blockchain?
When you need a record nobody can quietly change, like verifiable votes, payments or digital ownership. If a normal database does the job, we will tell you.
Which chains do you work with?
Ethereum, Solana, Polygon and BSV, with smart contracts written in Solidity and Rust.
How do you handle smart contract security?
Every contract gets test coverage and a security review before it goes live.
Shipped with this stack
Ready to talk it through?
Send us a short note about your product and goals. We reply within one business day.