Senior React Native Developer - Crypto.com App
About the role:
The role involves focusing on the development of top-notch mobile applications using React Native within a team setup. The emphasis is on creating apps with cross-platform functionality alongside native performance and interface. Prior experience in native iOS/Android development is highly beneficial for enhancing platform integration and optimization.
The impact you will bring:
Work closely with counterparts in tech and product teams within a collaborative feature setup to pioneer innovative features for a broad global user base.
Evaluate product requirements and designs from product owners, offering valuable input based on mobile development expertise.
Produce high-quality, modular, and scalable code that is both maintainable and testable within reasonable timeframes.
Engage in periodic synchronization not only with your feature team but with the complete mobile development team, ensuring your contributions are recognized and valued.
Your skill set:
Possess a minimum of 2 years of React Native development experience, with no upper limit specified.
Demonstrated proficiency in JavaScript/TypeScript and the React Native framework.
Valuable background in native iOS (Swift) and/or Android (Kotlin) development.
Understanding of native modules and the expertise to bridge React Native with native code.
Previous exposure to writing unit tests and end-to-end tests.
Competency in Git and experience with branching methodologies like Git-flow and Trunk Based Development.
Strong problem-solving skills coupled with a desire for continual learning.
Excellent communication and collaboration skills.
Dedication to producing top-tier code and delivering exceptional user experiences.
If you are a motivated and skilled React Native developer who excels in collaborative settings and boasts expertise in native mobile development, we encourage you to apply. Share examples of your work or links to your portfolio along with your application.
Backend Engineer with hands-on blockchain experience
Senior Blockchain Engineer (Cosmos SDK & IBC)
Expectations:
Design custom modules (x/staking, x/rewards, x/merkl)
Implement IBC light clients and relayers
Optimize block time and state pruning
Write comprehensive unit & integration tests (Go test)
Build CLI tools for validators and delegators
Monitor node health and network upgrades
Collaborate with the research team on MEV-resistant ordering
Maintain chain upgrades (v1 → v2) with migration scripts
Write technical documentation for external validators
Nice to have:
Experience with Avalanche Subnets or Polkadot Substrate
Knowledge of HSM and key management
Open-source contributions to Cosmos SDK or related repos
Chinese+English language proficiency
Full Stack Engineer focusing on Blockchain Technologies
We are looking for a highly capable Full Stack / Blockchain Engineer who can own both SaaS product development and blockchain infrastructure. This is a high-ownership role where you will help shape Worklo PSA and our blockchain payroll architecture from the ground up.
Key Responsibilities
* Build full-stack product features using Next.js, TypeScript, Node.js/Express, Supabase, PostgreSQL, React, shadcn/ui, and Tailwind CSS
* Design secure APIs, database schemas, authentication flows, and Supabase RLS policies
* Develop Solidity smart contracts for salary calculation and automated payroll distribution
* Build blockchain integrations for wallet registry, MetaMask/WalletConnect, payroll execution, and event syncing
* Deploy and manage smart contracts on Polygon or other EVM-compatible networks
* Implement dashboards for payroll visibility, wallet management, and transaction history
* Write tests for smart contracts using Hardhat, Foundry, or similar tools
* Improve performance, security, observability, and overall system architecture
Requirements
* 5+ years of full-stack software development experience
* 5+ years of blockchain development experience with deployed smart contracts
* Strong skills in TypeScript, Node.js, React, Next.js, PostgreSQL, and REST APIs
* Strong Solidity knowledge, including access control, reentrancy protection, gas optimization, and upgradeability
* Experience with ethers.js, viem, ERC-20 tokens, stablecoins, and EVM-compatible networks
* Ability to work independently in a remote-first, async startup environment
Nice to Have
* Experience with Supabase, Next.js App Router, React Server Components, Foundry, Hardhat, OpenZeppelin, The Graph, DeFi systems, multi-sig wallets, or multi-tenant SaaS platforms
Senior Mobile application developer
But specially, candidate should be native in English.
Team communication is very important.
Please bid US only
Thank you
Web Developer
I need a custom ebay like site for bitcoins or using stock credit on it. I need it to let you pay the user verbally, like an agreement you agree on that's it. I need the site fixed so it can be upgraded in the future.
I need it to be fixed so you can upload something to the site and sell it.
All I ask is keep the buying and selling part verbal agreements only. Like sending the user stock credit virtually.
Bid on things on the website
Sell things on the website
Buy things on the website
All I ask is keep the programming simple and the website in a simple form.
I need a website for the web browser and one for the phone web browsers.
If you can put in a custom user admin for it also, then that will be great.
Thank you,
Chris Clark (666 Encryption, CEO)