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| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Token Metrics | Austin, TX, United States | $45k - $72k | |||
Fmr | Boston, MA, United States | $140k - $285k | |||
Tempo | New York, NY, United States | $72k - $100k | |||
Byzantine Finance | Remote |
| |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Orion Valley | San Francisco, CA, United States | $91k - $100k | |||
Tether | Bucharest, Romania | $84k - $117k | |||
Tether | ZH ZĂĽrich CH | $84k - $117k | |||
Tether | London, United Kingdom | $84k - $117k | |||
Tether | Barcelona, Spain | $84k - $117k | |||
Tether | Dubai, United Arab Emirates | $84k - $117k | |||
Tether | Bangalore, India | $84k - $117k | |||
Tether | Tallinn, Estonia | $84k - $117k | |||
Tether | Dublin, Ireland | $84k - $117k | |||
Tether | Milan, Italy | $84k - $117k | |||
G2i Inc. | United States | $81k - $112k |
Token Metrics
$45k - $72k estimated
SDET Intern (Mobile and DeFi)
Austin, TX
Engineering Team /
Part-time /
Remote
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Mission
We are building a mobile-first passive investing app on HyperEVM. Our software handles real user funds and there is no undo button on-chain. Reliability and safety are core product features.
We do not run manual QA as a primary strategy. This role builds automated testing and quality gates that catch failures in CI before they reach users
What you will do
You will build and maintain an automated defense system for our highest-risk flows:Wallet connectionUSDC deposit and withdrawPortfolio selectionRebalance and risk guardrailsveTMAI membership gating
Stack
Mobile automation: Maestro (YAML-based flows for mobile UI and WebViews)
Smart contract testing: Foundry (unit tests, fuzzing, invariants)
Web automation: Cypress (secondary coverage for the read-only web dashboard)
CI/CD: GitHub Actions
Core code: TypeScript (React Native) and Solidity (ERC-4626 vaults)
Requirements
Must-haves
You are engineering-first. You write automation as production-quality code, not record-and-playback scripts.
Experience with at least one mobile E2E tool: Maestro, Detox, or Appium.
Comfortable with CI/CD and GitHub Actions workflows.
Strong debugging habits: You read logs, isolate root cause, and fix determinism issues.Clear written communication and consistent progress updates.
Nice-to-haves
DeFi familiarity: ERC-20 approvals, wallet signatures, and basic transaction states (submitted, confirmed, reverted).Foundry experience (or strong Solidity testing instincts).Experience testing React Native apps with WebViews.Experience shipping in a fast-moving startup environment.
Interview process
Portfolio review: We review your GitHub and look for evidence you built automation, CI, or test infrastructure that shipped.
Take-home build: We provide a simple React Native build and ask you to produce a working Maestro flow plus a minimal CI workflow.
Technical walkthrough: You explain your selector strategy, wait strategy, failure handling, and how you would scale coverage.
To apply
Send: GitHub link (or a code sample)
A short note describing the hardest test automation problem you solved and how you approached it
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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What is ERC20 example?
ERC20 is a standard for fungible tokens on the Ethereum blockchain
Here is an example of an ERC20 token
Let's say we create a new ERC20 token called ABC Token with a total supply of 1,000,000 tokens
Each token will be divisible up to 18 decimal places
To implement the ERC20 standard, we will need to define several functions, including:
- balanceOf(address): Returns the token balance of a specific address.
- transfer(address to, uint256 value): Transfers tokens from the caller's address to the specified address.
- approve(address spender, uint256 value): Approves a specific address to spend a certain amount of tokens on behalf of the caller.
- allowance(address owner, address spender): Returns the amount of tokens approved by the owner that the spender can transfer.
- User1 owns 500,000 ABC Tokens.
- User2 wants to buy 100 ABC Tokens from User1.
- User1 approves User2 to spend up to 100 ABC Tokens on her behalf.
- User2 calls the transferFrom() function with User1's address, his own address, and the value of 100 tokens.
- The transferFrom() function deducts 100 tokens from User1's balance and adds them to User2's balance.