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Serotonin

Frontend Engineer - React Native (External)

Sorry, this job was removed at 04:11 p.m. (GMT) on Thursday, Jun 05, 2025
In-Office or Remote
9 Locations
In-Office or Remote
9 Locations

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Lead complex post-sales engagements as Solutions Architect, focusing on architecture, implementation, and technical support for enterprise customers in APAC. Collaborate closely with various teams to optimize integrations and deliver high customer satisfaction.
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Our client is a cutting-edge company focused on revolutionizing global payments by building a scalable, zero-fee payment platform secured by Bitcoin. Their innovative technology enables fast, secure, and cost-effective digital transactions, with the potential to reshape how the world interacts with money.

We’re looking for a Mid-Level Frontend Engineer with expertise in React Native to join their team. In this role, you’ll build intuitive and responsive mobile applications that connect users to our cutting-edge payment platform, redefining the way the world transacts.

If you’re excited about joining a dynamic and purpose-driven environment where your ideas can shape the future, we’d love to meet you. Together, we can redefine what’s possible in the world of digital connectivity and data management.

Key Responsibilities:

  • Develop, maintain, and optimize mobile applications using React Native for iOS and Android platforms.
  • Integrate blockchain-based functionalities and payment features into mobile applications.
  • Collaborate with cross-functional teams to design, develop, and deploy new features.
  • Optimize applications for performance, scalability, and cross-browser compatibility.
  • Integrate with blockchain technologies and APIs to deliver real-time data and interactions.
  • Participate in code reviews and contribute to maintaining high development standards.
  • Stay informed about emerging trends and best practices in frontend development and apply them to enhance the platform.

Key Requirements:

  • 3+ years of experience in frontend development, with at least 1–2 years focused on React Native.
  • Proficiency in JavaScript/TypeScript and experience building and deploying mobile apps for both iOS and Android.
  • Solid understanding of mobile UI/UX design principles and responsive design.
  • Familiarity with state management libraries like Redux or Context API.
  • Experience integrating APIs, including RESTful and WebSocket communication.
  • Knowledge of testing frameworks and tools for React Native applications.
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and teamwork abilities.

Preferred Qualifications

  • Experience with blockchain or fintech applications.
  • Familiarity with Web3 libraries and integrating decentralized features.
  • Knowledge of native modules and bridging in React Native.
  • Background in performance optimization for mobile applications.
  • Contributions to open-source projects or personal mobile app development experience.

What We Offer

  • Competitive salary and equity options.
  • Flexible working hours and remote-friendly environment.
  • The chance to work on cutting-edge technology with a talented, passionate team.
  • Opportunities for professional growth and learning.

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

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