Senior Software Engineer (Mobile)
BitMEX, a prominent cryptocurrency derivatives trading platform, is renowned for its innovative approach to cryptocurrency trading. With a strong focus on change and pushing boundaries, BitMEX continuously sets industry standards for innovation, liquidity, and security.
Operating as a cutting-edge peer-to-peer crypto-products trading platform and API, BitMEX empowers hundreds of thousands of traders worldwide, facilitating transactions of billions of USD each day.
About Us
Established in 2014, BitMEX has emerged as a global leader in crypto derivatives exchanges, offering traders a professional-grade platform while maintaining an exceptional security record without any loss of funds. Our platform provides low latency, deep liquidity, and high availability, catering to the needs of cryptocurrency derivatives traders. BitMEX offers over 100 derivatives contracts, 11 spot trading pairs, and seamless conversions between 30 cryptocurrencies.
In 2015, BitMEX introduced the Perpetual Swap, revolutionizing the crypto market as one of the most widely traded products. Demonstrating a strong commitment to transparency, BitMEX regularly discloses its on-chain Proof of Reserves and Proof of Liabilities since 2021, ensuring sufficient funds to cover client balances.
For detailed information on BitMEX, company initiatives, product launches, and competitions, please refer to BitMEX Blog, and follow our communication channels on Discord, Telegram, and Twitter.
Overview
BitMEX operates as a leading crypto exchange with an efficient web application and API. The team is currently developing a mobile application to offer users an enhanced trading experience in a more user-friendly interface. The engineering team, along with UX designers, strives to deliver a top-notch experience.
As a Senior Software Engineer (Mobile), you will utilize your expertise in designing and implementing mobile applications. The mobile app for iOS and Android is developed using React Native with Javascript, Kotlin, and Swift. Ideal candidates should possess a solid background in React Native development and familiarity with either native iOS or Android.
Key Responsibilities
- Collaborate with product managers and designers to innovate and deliver exceptional user experiences
- Contribute to engineering standards through active participation in code reviews, team discussions, and promoting best coding practices
- Ensure optimal user experience by producing well-tested and high-performing code
- Develop the BitMEX React Native mobile application
- Guide and mentor other engineers on coding practices and design principles
- Explore new components and architectural ideas as needed
- Conduct regular code reviews
- Experience with native iOS or Android development is advantageous
Qualifications
- Proficiency in Javascript and/or React Native
- Extensive experience in scaling mobile applications across various devices
- Hands-on experience in mobile end-to-end testing
- Ability to make complex, data-driven products accessible to consumers
- Comfort working on multiple products concurrently
- Familiarity with current UX trends and openness to new concepts
- Demonstrated ability to work effectively in small teams and take ownership of product features
- Detail-oriented, focused, and capable of delving deep into code to derive insights and solutions
- Passion for technological innovation and keen interest in the crypto space
Senior IOS
Senior iOS developer for GameDev startup
Genre
Real-time competitive 1v1 / 2v2 skill-based action game
Platform
iOS (iPhone first, iPad optional)
Core Idea
A pure skill game where players compete in short, intense arena matches using precision timing, reflexes, and positioning — no RNG, no pay-to-win.
Each match lasts 60–90 seconds, making it ideal for mobile sessions while supporting competitive depth.
Core Gameplay Loop
Matchmaking
Skill-based MMR
Ranked & unranked queues
Arena Match
Small symmetrical arena
Players control a single character
Objective: score points by outplaying, not overpowering
Score & Progress
Win → rank up
Lose → learn (clear replay & stats)
Cosmetics only progression
Controls (Mobile-First, High Precision)
Left thumb: Movement (virtual joystick)
Right thumb: Aim + action swipe
Tap: Ability activation
Perfect timing windows reward precision (parries, counters)
👉 Designed to feel closer to a fighting game than a casual mobile title.
Mechanics (Skill > Stats)
Core Mechanics
Dash with cooldown (positioning skill)
Timed parry (frame-perfect defense)
Charged shots (risk vs reward)
Combo chaining (execution mastery)
No Randomness
Fixed damage
Fixed cooldowns
No crit chance
No loot boxes
Competitive Depth
Skill Expression
Reaction time
Prediction & mind games
Spacing & arena control
Cooldown tracking
Skill Ceiling
Easy to learn (1 minute)
Hard to master (1000+ matches)
Game Modes
Ranked Duel (Main Mode)
1v1
Best of 3 rounds
Seasonal leaderboard
Team Arena
2v2 coordinated play
Shared objectives
Training / Practice
Frame timing visualizer
Ghost replays of top players
Visual Style
Clean, minimalistic sci-fi arenas
High contrast for readability
60–120 FPS target (ProMotion)
👉 Performance clarity > visual noise.
Monetization (Fair & Competitive)
Skins (characters, arenas, effects)
Emotes / victory poses
Battle pass (cosmetic only)
🚫 No power boosts
🚫 No energy timers
🚫 No loot RNG
Technical Design (iOS-Optimized)
Native Swift
Metal / SpriteKit
Deterministic simulation
Server-authoritative logic
Rollback netcode (if real-time PvP)
Rust/blockchain
Frontend Developer
Responsibilities:
Build responsive, performant web applications
Implement designs with attention to UX detail
Integrate with backend APIs and manage application state
Ensure cross-browser compatibility and accessibility
LEAD Backend Engineer
Responsibilities:
Design and implement scalable backend architecture
Lead technical decisions and mentor backend team members
Optimize system performance and ensure high availability
Establish best practices for code quality and deployment