| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
IOTA Foundation | Remote | $63k - $70k | |||
Fractional | United States | $95k - $170k | |||
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Optimism | Remote | $81k - $100k | |||
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DOT Indonesia | Indonesia | $64k - $83k | |||
IOTA Foundation | Remote | $63k - $70k | |||
Stargate | Miami, FL, United States | $200k - $280k | |||
Coinocracy | Palo Alto, CA, United States | $150k - $200k | |||
Otis | Remote | $63k - $100k | |||
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Celo Foundation | San Francisco, CA, United States | $54k - $77k | |||
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This job is closed
Mobile App Developer (Hybrid) - Firefly Wallet
Introducing Firefly
Firefly is the official wallet for the IOTA cryptocurrency. Firefly’s goal is to simplify digital asset management to the point where cryptocurrency can achieve mass adoption. Firefly Desktop has already been released with industry-leading security and a delightful user experience. We are now building a mobile app (Firefly Mobile) and a web extension (Firefly Web).
As a Mobile Developer you will be working on Firefly Mobile. You will be instrumental in unlocking the full potential of web3, by building one of the best mobile wallet user experiences for a cryptocurrency that has no fees. Over the coming months we will be introducing interesting features like NFTs, ERC20 tokens, decentralised voting and more.
Firefly Mobile is written in a mixture of JavaScript/TypeScript, Rust and native iOS and Android (via Ionic Capacitor).
Tasks
As a Mobile Developer in the Firefly Team, you will:
- Be part of an ambitious, self-organizing agile team
- Build a world-class user experience in a novel industry
- Develop applications used by hundreds of thousands of people
- Be actively involved in setting product and technical direction
Requirements
Your Experience
- Solid experience developing mobile apps for iOS and/or Android
- Experience developing cross-platform mobile apps (e.g. Capacitor, React Native, Flutter)
- Experience with JavaScript and TypeScript
- Front-end experience in frameworks such as Svelte, React, Vue.js, Angular
- Enthusiasm for building a great user experience
Bonus Experience
- Experience working with smart contracts
- Experience working in fintech
- Experience with the Rust programming language
- Experience working with open-source software
Benefits
What we offer
- The opportunity to work with the brightest minds in the industry
- A culture of trust, empowerment and support
- A flexible organization with a flat hierarchy
- Independence and responsibility from day one
The IOTA Foundation is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all our employees.
IOTA Foundation’s Mission
The IOTA Foundation’s mission is to drive the development and adoption of the IOTA protocol. IOTA is a distributed ledger offering a novel alternative to blockchain that is scalable, feeless and lightweight. We are a not-for-profit organization headquartered in Berlin with our team distributed around the world. We work alongside businesses, governments, developers and academic institutions to bring IOTA’s vision to reality.
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.