Emir Hodzic

DeFi prime brokerage for on-chain leveraged trading, lending, and cross-margin across DEX and CEX venues · Contract · Remote

• Own all of the platform's test automation: the admin portal, the borrower and lender web apps, and the REST and WebSocket APIs behind them. The suites are Playwright and TypeScript, and I maintain the CI that runs them.
• Reported over 200 bugs in the past year, 10-20 of them high severity. Each report included the root cause, whether that was a product defect or a test data issue, not just reproduction steps.
• My suite gates every release. A build cannot move to the test phase until it passes, and the team treats a red run as a real problem because false alarms are rare.
• Run real MetaMask E2E tests in CI against Tenderly forked-mainnet testnets, covering wallet onboarding, dApp connect, network switching, and transaction signing. We vendor and pin the extension because LavaMoat lockdown and upstream MetaMask releases used to break the pipeline.
• Ported the API regression suite (150+ tests) from V2 to V3 endpoints without letting it go red in CI during the cutover.
• Test data is seeded through the API rather than the UI: orgs, users, whitelisted wallets, on-chain funding. A reusable seed cache keeps local iteration fast, and every run starts isolated.
• Reconcile the same value across the UI, REST, WebSocket, on-chain state, and ClickHouse analytics (the helpers use ethers.js/viem). The same tests validate health factor, stress test matrix, and liquidation math against the product's own numbers.
• When production incidents happen I dig through distributed traces and logs to find the cause, then backfill a regression test for it.
• Test the centralized exchange integrations (Binance, Bybit, OKX, Hyperliquid): balances, positions and PnL, read-only account safety.
• Also cover RBAC and policy engine behavior across roles and scopes.

Cardano ecosystem: Catalyst Voices, Metadex (DeFi), and the Lace light wallet · Full-time · Remote

• Wrote the Catalyst Voices test framework (Playwright, TypeScript) from the first commit.
• Containerized the whole stack with Docker networks and Nginx (catalyst-gateway, voices, mock-reviews). Runs stopped depending on shared environments after that.
• Third-party wallet releases kept breaking CI, so I started self-hosting pinned wallet builds in AWS S3. That killed the whole class of flake.
• Caught on-chain bugs, including malformed UTxO structures and registration transactions that over-charged fees.
• Worked directly with Cardano tooling (cardano-cli, Lucid, Mesh) for wallet and transaction test flows.
• As QA lead on Metadex (a DeFi project) I managed vendor teams and built the Playwright integration and E2E suites. To test the DEX logic we deployed custom tokens and liquidity pools on testnet, a full mock DeFi environment.
• On the Lace light wallet I cleaned up WebdriverIO onboarding-test debt and wired Slack reporting into CI, which surfaced blockchain sync issues as they happened.

Concurrent contract alongside System Verification · Contract · Remote

• Modernized an inherited test library to speed up runs, and set up Cypress automation for an internal web application.

QA on a job marketplace product · Full-time

• Set up the QA process and shifted testing left. The automation started as Python, pytest and Selenium, was later rebuilt in TypeScript and Playwright, and ran in GitHub Actions with Slack reporting. Onboarded 3 QAs along the way.

Regus office-rental platform

• Wrote automated scenarios from feature specs and rebuilt an inherited .NET Framework and Selenium suite on .NET Core and xUnit.

US insurance web applications (Vertafore)

• Regression tested customer-facing web apps and automated an internal tool.

Computer Science department