(Mid/Senior) iOS Developer - Exchange App

Status
Hong Kong
Full time
Hybrid
Compensation is not specified
Role
iOS Developer
Description

About the Role:

As a key member of our team, you will specialize in developing top-tier iOS applications using contemporary technologies. Our applications are crafted exclusively in Swift and adhere to an MVVM architecture, incorporating technologies like RxSwift and SwiftUI. Knowledge of reactive programming and SwiftUI is advantageous.

How You Will Make a Difference:

  • Collaborate closely with tech and product team members in a multifunctional feature team to create innovative features for a vast global user base.
  • Analyze product requirements and designs provided by product owners, offering valuable feedback based on your iOS development expertise.
  • Deliver top-quality, modular, and scalable code that is maintainable and testable within reasonable timelines.
  • Participate in regular sync-ups not only within your feature team, but also across the entire iOS team, ensuring your insights and ideas are acknowledged and valued.

Your Expertise:

  • Minimum 4 years of comprehensive iOS development experience (no upper limit).
  • Proficiency in Swift, UIKit, and a solid grasp of iOS development best practices.
  • Familiarity with MVVM architecture (experience in RxSwift and SwiftUI is highly preferred).
  • Experience in creating unit tests and snapshot/UI tests.
  • Proficiency in Git and familiarity with branching models such as Git-flow and Trunk Based Development.
  • Strong problem-solving skills and a drive for continuous learning.
  • Excellent communication and collaboration skills.
  • Commitment to producing high-quality code and exceptional user experiences.
  • Candidates with more experience will be considered for a senior developer position.

If you are a dynamic and skilled iOS developer who thrives in a collaborative environment, we invite you to apply. Share examples of your work or links to your portfolio in your application.

Life at (Company Name):

  • Think big and explore new opportunities while collaborating with a talented, ambitious, and supportive team.
  • Embrace a transformational and proactive work environment to find inventive solutions.
  • Benefit from internal skill development opportunities that impact personal and professional growth.
  • Engage with colleagues for mutual support and assistance.
  • Collaborate as one cohesive team toward the common goal of making cryptocurrency universal.

Are you ready to jumpstart your future with us?

Benefits:

  • Competitive salary.
  • Comprehensive medical insurance with extended coverage for dependents.
  • Generous annual leave entitlement, including birthday and work anniversary.
  • Flexibility in work arrangements with options for remote or hybrid setups.
  • Room for career progression through internal mobility programs.
  • Work perks including a company Visa card.

About (Company Name):

Established in 2016, (Company Name) caters to over 80 million customers and is the world's fastest-growing global cryptocurrency platform. The vision is to make cryptocurrency accessible to everyone. (Company Name) is committed to fostering the adoption of cryptocurrency through innovation and empowering the next generation of innovators for a fairer and more equitable digital landscape.

(Crypto.com) is an equal opportunity employer that values diversity and inclusion, encouraging candidates from various backgrounds to join the team. Personal data provided by applicants will be used solely for recruitment purposes.

Skills Required
Avatar
Сrypto.com
Company size
Not specified
Location
United States
Description
Not specified
Status

More Full-time Jobs

Show more

Senior Blockchain Engineer - Low-Latency Execution Infrastructure (HyperEVM / Hyperliquid)

Full time
Remote
 
 
we’re looking for a senior blockchain engineer to build low-latency execution infrastructure around hyperevm and hyperliquid-related trading systems.
 
this is not a frontend or dapp role. the focus is on real-time execution systems, chain-native infrastructure, and market-aware backend engineering where latency, ordering, and state correctness directly impact execution outcomes.
 
you will work on systems that operate under noisy, adversarial, and highly dynamic conditions, including delayed or missing websocket events, rpc inconsistencies, transaction lifecycle complexity, state desynchronization, retries, and recovery logic.
 
core responsibilities include building and maintaining realtime blockchain data pipelines, websocket and rpc streaming systems, execution orchestration layers, liquidity-aware routing logic, transaction lifecycle management, and integration with orderbook and market data systems.
 
we are specifically looking for engineers who think in systems rather than features. meaning understanding how data flows through pipelines, how state evolves over time, how failures propagate, and how to design systems that recover automatically without manual intervention.
 
areas of work include:
 
- realtime blockchain data ingestion
- mempool-aware execution flows
- transaction lifecycle handling
- execution sequencing and routing
- websocket and rpc infrastructure
- state synchronization systems
- liquidity and orderbook integration
- performance and latency optimization
 
you should be comfortable working with distributed systems, asynchronous event processing, and latency-sensitive backend architectures.
 
strong experience in one or more of the following areas is highly relevant:
 
- exchange infrastructure
- trading systems
- execution engines
- blockchain indexers
- realtime event systems
- arbitrage systems
- rpc/node infrastructure
- defi backend systems
- low-latency backend engineering
 
preferred technical stack:
 
- typescript / node.js
- go
- rust
- python
- postgres
- clickhouse
- redis
- kafka or similar messaging systems
- docker
- linux environments
- evm rpc internals
- websocket infrastructure
 
ecosystem familiarity:
 
- ethereum, arbitrum, base, optimism, bsc
- hyperliquid / hyperevm
- foundry
- ethers.js / viem
- geth / erigon / nethermind
- dex and amm mechanics
- liquidity math, slippage, gas strategy, routing logic
 
this role is not suitable for:
 
- frontend-only developers
- nft or basic dapp experience only
- tutorial-level web3 developers
- candidates without production systems experience
 
we value engineers who have built real systems where correctness, latency, and reliability matter under load. we care less about buzzwords and more about concrete systems you have personally built and operated.
 
ideal candidates can clearly explain:
 
- system architecture decisions
- bottlenecks and tradeoffs
- failure modes and recovery strategies
- latency considerations in real systems
- production debugging experience
 
working style:
 
- remote
- async-first
- low bureaucracy
- high ownership
- engineering-driven team
- direct technical communication
 
we strongly prefer practical engineering depth over polished presentation. if you have built or worked on systems involving realtime data, trading infrastructure, blockchain execution, or latency-sensitive backend systems, please include details of those systems when applying.
 
Payment in Crypto
6,000-13,500
Monthly
See details

Senior Full-Stack Engineer (AI & Web Applications) at DSCUFO

California, USA
California, USA
Full time
Remote
About DSCUFO
DSCUFO(https://dscufo.xyz) is building next-generation AI and Web3 products that bridge decentralized technologies with real-world applications. We are seeking an experienced Blockchain Developer to help build secure, scalable, and innovative blockchain solutions.
Responsibilities
Develop frontend and backend features
Build APIs and integrations
Design scalable application architecture
Work with cloud infrastructure and databases
Collaborate with product and design teams
Deliver production-ready solutions
Requirements
Strong experience with React, Next.js, TypeScript, and Node.js
Experience with Python backend development
Knowledge of PostgreSQL and cloud platforms
Experience building SaaS applications
Familiarity with AI integrations and APIs
Strong problem-solving skills
Preferred
Experience with LangChain, OpenAI APIs, or AI agents
Web3 integration experience
DevOps and CI/CD knowledge
Compensation
Competitive compensation based on experience.
Payment in Crypto
7,500-10,833
Monthly
See details

Senior Blockchain Developer (Smart Contracts & Web3 Infrastructure)

Full time
Remote
Senior Blockchain Developer (Smart Contracts & Web3 Infrastructure)
About DSCUFO
DSCUFO(https://dscufo.xyz) is building next-generation AI and Web3 products that bridge decentralized technologies with real-world applications. We are seeking an experienced Blockchain Developer to help build secure, scalable, and innovative blockchain solutions.
Responsibilities
Design and develop smart contracts
Build and integrate Web3 infrastructure
Implement wallet connectivity and blockchain interactions
Conduct smart contract testing and security reviews
Collaborate with frontend and backend teams
Optimize gas efficiency and protocol performance
Requirements
3+ years of blockchain development experience
Strong Solidity and EVM ecosystem knowledge
Experience with Hardhat, Foundry, or Truffle
Understanding of DeFi, NFTs, DAOs, and token standards
Experience integrating Web3 wallets and RPC providers
Strong security mindset
Nice to Have
Rust or Solana development experience
Smart contract auditing experience
Knowledge of Layer-2 ecosystems
Compensation
Competitive compensation based on experience.
Payment in Crypto
8,333-11,667
Monthly
See details

Blockchain Engineer ‑ Copy-Trade Protocol at Zignaly

Singapore
Singapore
Full time
Remote
Mission:Emit immutable trade clones at the speed of mempools. Engineer on-chain vault + relay contracts that ingest master signals, laser-bridge them across EVM chains, and absorb slippage, MEV, and NFL Sunday-level volatility without exposing followers to liquidation contagion.
Stack & Level Requirements
Solidity 0.8.25+ via Foundry toolchain (Forge, Anvil, Cast) or Rust/Anchor on Solana
Proficiency: Huff / Yul inlines for gas micro-optimisations, EIP-712 signing, EIP-1167 minimal proxies
Cross-layer bridges: LayerZero, Wormhole, CCIP + custom relayers for <2 s finality
MEV-Geth style searchers – understand sandwich mechanics to architect commit-reveal patterned entry pools
Price oracles: Chainlink CCIP-read, Pyth, custom tick-level fallback for sub-$0.05 deviation error in volatility freak events
Security toolkit: Slither, Mythril, Echidna fuzz 1e6 vars/run, invariant bracelets as code
Gas profiling: forge-std Vm for on-chain gas snapshots pre-per-release hook
Hard-Check Trader DNA
⚔️ You have personally executed >$10 k notional on perpetuals & on-chain or cross-margined DeFi strategies with stress traces or Etherscan proof of addr.
⚔️ You’ve felt (or caused) impermanent loss >10 % in a single block.
⚔️ Optional but revered: vault or strategy on DeFiLlama/Apeboard with >$50 k TVL linked to your keys.
Responsibilities
Build gas-constrained e2e testnets atop Anvil mainnet fork for every release candidate.
Continuous white-hat review loop – both formal (Certora specs) & red-team bounty (Immunefi).
Coordinate with backend for off-chain signatures (EIP-712 typedData balancers).
Draft governance & upgrade timelocks (OpenZeppelin UUPS).
Be on-call for on-chain incidents (failed Oracle, stuck bridge, keeper tottering). with protocol parameters YAML files.
Soft Enemies – Don’t apply 
ifYou only deployed ERC-20 tokens and never** felt liquidation missiles.
You ignore MEV game theory.
Perks / Weapons Cache
Hardware fund: Apple M Max + 64 GB RAM, 10 Gbps fibre hookup.
Personal copy-trading gas allowance 1 k USD monthly – trade openly on testnet, share P&L in public.
Health stipend for red-eye debugging—includes premium dark-coffee & builder-milk.
Additional 1 % of inflation-scheduled supply upon achieving $100 m copy-AUM on ETH L2.
Apply Now
Attach:
Your latest CV. 
Etherscan link to your most brutal trading bot / vault (& TVL proof). 
GitHub repo (>20 stars) or archived PR of previous audited live contract address. 
Recorded deep-dive Loom of <180 s showing circuit breaker you built.
Cut-over: Applications stack-ranked & closed within 7 calendar days or when 3 offers signed—whichever happens first. Ready to ship settlement layer blood sport? 💥☠
Payment in Crypto
12,500-18,333
Monthly
See details

Blockchain Developer (Solidity + Web3 + MERN Stack)

Richmond, USA
Richmond, USA
Full time
Remote
We are looking for an experienced Blockchain Developer to join our development team and work on decentralized applications (DApps) and smart contract-based systems. 
You will be responsible for building and integrating blockchain-based features into modern web applications using Solidity, Web3 technologies, and MERN stack (React, Node.js, Express, MongoDB). 
 
 🚀 Responsibilities 
- Develop and deploy smart contracts using Solidity 
- Build and maintain Web3 integrations (ethers.js / wagmi / web3.js) 
- Implement wallet connection (MetaMask and similar wallets) 
- Develop responsive frontend interfaces using React + TailwindCSS 
- Work with backend APIs using Node.js / Express 
- Integrate blockchain data with backend systems when needed 
- Ensure security, efficiency, and scalability of smart contracts 
- Collaborate with UI/UX and backend developers
 
🧩 Required Skills 
- Strong experience in Solidity smart contract development 
- Experience with Web3 libraries (ethers.js, wagmi, or web3.js) 
- Solid understanding of Ethereum / EVM ecosystem 
- Experience with React.js and TailwindCSS 
- Knowledge of Node.js, Express, MongoDB (MERN stack) 
- Experience with wallet integrations (MetaMask, WalletConnect) 
- Understanding of smart contract security best practices
 
💡 Nice to Have 
- Experience with Hardhat or Foundry 
- Knowledge of DeFi, NFTs, or staking systems 
- Experience deploying to testnets (Sepolia, Polygon, etc.) 
- Familiarity with TypeScript 
- Experience with CI/CD for smart contracts
Payment in Crypto
8,000-11,200
Monthly
See details