Software Engineer (iOS) - Performance Optimization
Singapore
Full time
Office
Compensation is not specified
Role
iOS Developer
Description
About OKX:
Founded in 2017, OKX is a leading exchange platform for cryptocurrency spot and derivatives trading. Utilizing blockchain technology, OKX offers a wide range of innovative products, solutions, and trading tools that have reshaped the financial ecosystem. With a global user base of over 20 million individuals across 180 regions, OKX aims to provide a user-friendly platform that enables everyone to explore the world of crypto. Furthermore, OKX Insights, the research arm of OKX, stays ahead of cryptocurrency industry trends. With a commitment to innovation, OKX envisions a future of financial access driven by blockchain and decentralized finance.
About the team:
As a mobile software engineer, you will be responsible for building and maintaining the core OKX mobile application that serves millions of daily active users. Collaborating with design, product, and other engineering teams, you will identify customer needs and deliver high-quality new features through fast iterations. This position provides an opportunity to gain comprehensive knowledge of cryptocurrency mobile applications, including trading, asset management, and wallets.
Responsibilities:
- Develop mobile infrastructure and tools to optimize engineering efficiency
- Analyze and optimize UI and infrastructure application code for enhanced performance
- Create and maintain reusable iOS app components
- Collaborate with product engineering teams to offer technical solutions and implement best practices
- Enhance project structure and workflow to improve engineering productivity, efficiency, and quality
- Drive architecture innovations to support world-class mobile app development
Requirements:
- Bachelor's degree or equivalent practical experience
- Minimum of 3 years of industry experience in iOS development
- Demonstrated experience in building and releasing sophisticated iOS app products with frequent iteration
- Proven track record of optimizing app performance, reducing memory usage, and minimizing package size
- Strong understanding of design patterns and principles, with extensive knowledge of iOS tech stack
- Proficiency in Objective-C, Swift, C/C++, and tools like Xcode and instruments
- Deep knowledge of iOS SDK and ability to create scalable, dynamic, and high-performance UI components
- Familiarity with remote APIs, concurrency, layouts, transitions, animations, client-side persistence, and architectural patterns in mobile apps
Nice-to-have:
- Experience working in complex, cross-functional, or cross-business projects within a matrix organization
- Background in mobile architecture/infrastructure team with in-depth knowledge of related tech stack
- Expertise in sub-engineering areas such as performance optimization, toolchain, automated testing, and design patterns
- Excellent communication skills, both within a team and in delivering impactful business outcomes autonomously
Skills Required
OKX
Website
www.okx.comCompany size
Not specified
Location
United States
Description
Not specified
Hoi Vo
Developer bot
Full time
Remote
I'm looking for a telegram bot Developer, please contact me on telegram if you are ready to build a bot, just a sample bot and no much coding need
Here is my telegram id @EIonmuskkkk
Here is my telegram id @EIonmuskkkk
Payment in Crypto
Lester Ramírez
I am looking for an Android developer to work on a project using Firebase Studio with Dart.
Part time
Remote
I am looking for an Android developer to work on a project using Firebase Studio with Dart. Currently, payment will be based on small task packages worth $5 in ETH each, with opportunities for higher wages as the company grows and generates more revenue.
Contact me on Telegram: t.me/LesterRF
Contact me on Telegram: t.me/LesterRF
Payment in Crypto
Ian Fox
Need SEO expert to get us to Google first page rank
Full time
Remote
I need an SEO expertteam who is capable of getting our shops to Google first page rank on our desired keywords
Payment in Crypto
Quinn Bosnie
Have you built token launch platforms or bonding curves on Solana before?
Amsterdam, Netherlands
Amsterdam, Netherlands
Full time
Remote
Hey, I’m launching a project a secure, user-friendly memecoin launchpad on Solana that fixes the problems with platforms like Pump.fun (rug pulls, no LP locks, devs dumping). I’m looking for a Solana smart contract dev (or full-stack) to help me build an MVP. This includes:• Token creation with a dev wallet cap (max 5%)• Bonding curve or simple fair launch system• Auto liquidity lock for 3 months• Optional blue badge verification (paid upgrade)• Raydium listing or integration I’d love to know if you’ve worked on similar Solana or DeFi projects. If you’re interested, I can send a quick brief + we can chat timelines and budget. Let me know — I’m ready to move fast if you’re a good fit
Market Maker
Technical Cofounder – Mobile App Lead (Equity Role)
Full time
Hybrid
Looking for a Tech Cofounder (Mobile App Developer)
Equity + Leadership Role | Remote | Africa-focused
We’re building something bold — a platform designed to empower everyday people through real-world commerce and daily utility. The concept is built, the community is growing, and the brand is already in motion. Now, we’re ready to build the MVP.
We’re looking for a technical cofounder — someone with the skill to build and the vision to lead.
What You’ll Own:
• Lead the mobile app development (Android-first; iOS optional for now)
• Build core features: user registration, listings, wallet logic, escrow integration, and payments
• Collaborate on product direction and tech decisions
• Scale with the company as a core part of the founding team
Ideal Experience:
• You’ve built marketplace-style or P2P mobile apps before
• You’re comfortable with payment APIs like Paystack, Flutterwave, or others
• You understand how to work with wallets, escrow flows, and multi-user platforms
• You’re not just a builder — you want to grow with a brand and own a meaningful slice of it
Your Role Is Not Freelance.
This is a cofounder opportunity — you’ll help shape the product, tech stack, and long-term vision. You’ll receive equity and work closely with the founding team to build a scalable African-first product.
Equity + Leadership Role | Remote | Africa-focused
We’re building something bold — a platform designed to empower everyday people through real-world commerce and daily utility. The concept is built, the community is growing, and the brand is already in motion. Now, we’re ready to build the MVP.
We’re looking for a technical cofounder — someone with the skill to build and the vision to lead.
What You’ll Own:
• Lead the mobile app development (Android-first; iOS optional for now)
• Build core features: user registration, listings, wallet logic, escrow integration, and payments
• Collaborate on product direction and tech decisions
• Scale with the company as a core part of the founding team
Ideal Experience:
• You’ve built marketplace-style or P2P mobile apps before
• You’re comfortable with payment APIs like Paystack, Flutterwave, or others
• You understand how to work with wallets, escrow flows, and multi-user platforms
• You’re not just a builder — you want to grow with a brand and own a meaningful slice of it
Your Role Is Not Freelance.
This is a cofounder opportunity — you’ll help shape the product, tech stack, and long-term vision. You’ll receive equity and work closely with the founding team to build a scalable African-first product.