Senior React Native Developer

About the Role

We are looking for a Senior Android Engineer with deep React Native expertise to build and own the trading

experience on Android — real-time data, interactive charting, fluid interactions, and rock-solid performance. What We’re Looking For

You have shipped production React Native apps that handle real-time data streams, complex UI states, and

performance-sensitive rendering. You understand the Android platform deeply — native modules, bridge

performance, and platform-specific behaviour. Ideally, you have worked on trading, fintech, or data-intensive

mobile products. You take ownership of your features end-to-end, care about code quality, and are comfortable

driving technical decisions independently. What You’ll Do

• Own the mobile trading experience on Android — architecture, performance, and end-to-end quality. • Build and optimize real-time data rendering — WebSocket lifecycle management, efficient list rendering, and minimal re-renders for streaming data. • Integrate complex WebView-based components with bidirectional JavaScript bridge communication. • Collaborate with product and design to deliver polished, intuitive interfaces for a financial product where

trust and clarity are paramount. • Define mobile engineering standards — component architecture, state management patterns, testing

strategy, and performance benchmarks. • Drive code reviews, mentor team members, and champion best practices across the mobile team. • Participate in stabilization and release cycles — profiling, device matrix testing, and regression analysis. Must-Have

• 4+ years React Native experience with production apps on Google Play Store. • Strong TypeScript skills and deep understanding of React Native internals — bridge, native modules, and

performance optimization. • Experience with real-time data handling — WebSockets, efficient UI updates for streaming data, and

state synchronization. • Experience integrating WebView-based components with JS bridge communication. • Proficiency with state management at scale (Redux, Zustand, or MobX).

• Experience with push notifications (FCM), deep linking, and complex navigation patterns. • Strong debugging skills — Flipper, React DevTools, native crash analysis, and performance profiling. Nice-to-Have

• Prior experience building trading, brokerage, or fintech mobile apps. • Experience with charting library integration in mobile apps. • Knowledge of server-driven UI (SDUI) patterns. • Experience with feature flags, A/B testing frameworks, and app modularization. • Familiarity with native Android development (Kotlin) for bridge modules. Tech Stack

Framework React Native

Language TypeScript / JavaScript

State Management Redux / Zustand

Real-time WebSocket, SSE

Charting Charting library via WebView bridge

Testing Jest, Detox (E2E), device matrix testing (Android 10+)

Requirements / Experience:

• Min 4 Years of Experience
• Experience in cross-platform mobile software development (Android/iOS) using technologies such as React Native, Flutter, GO/ Golang, Xamarin, Blazor, JavaScript, TypeScript, Dart, C#
• Familiarity with API Development (REST, Web API, WCF, SOAP)
• Experience with full-lifecycle design, development, and testing of critical business applications
• Good problem-solving skills with attention to detail
• Strong verbal, written, interpersonal, and organizational skills
• Ability to work independently and in a team environment
• Ability to multi-task effectively
• Reliable, highly motivated, with a positive attitude
• Experience with MsSQL, MariaDB

• Swift
• MVVM
• API integration using JSON
• GIT, JIRA
• Ability to understand requirements
• Ready to mentor juniors

• Develop advanced and secure applications for Android phones and tablets
• Continuously discover, evaluate and implement new technologies, libraries for application to improve the functionality
• Keep eye on new technologies to maximize development efficiency
  Unit-test based coding for modular coding, reusability;
• Writing readable code; Maintain technical documentation
• Bug fixes and improving performance of existing applications
• Work on new ideas for products, it’s prototypes and estimates
• Collaborate on projects with a closely knit team

Location: Bangalore, Gurgaon, Work From Home

Function: Software Engineering → Mobile Development

iOS Developer Responsibilities:

• Designing and building mobile applications for Apple’s iOS platform.
• Collaborating with the design team to define app features.
• Ensuring quality and performance of the application to specifications.
• Identifying potential problems and resolving application bottlenecks.
• Fixing application bugs before the final release.
• Publishing application on App Store.
• Maintaining the code and atomization of the application.
• Designing and implementing application updates.

EXPERIENCE

iOS Developer Requirements:

• BE, B Tech, ME, M Tech, MCA in Computer Science with 3-9 years of experience

• Proven experience as an app developer.
• Proficient in Objective-C/ Swift/ Cocoa Touch.
• Knowledge of iOS back-end services.
• Knowledge of Apple’s design principles and application interface guidelines.
• Proficient in code versioning tools including Mercurial, Git
• Ability to work with crash analytics, CI/CD etc regarding iOS development
• Familiarity with push notifications, APIs, and cloud messaging.
• Experience with continuous integration.

1. Minimum 4+ years of mobile application development experience in native and excellent coding skills in Swift, RxSwift, RxCocoa, Objective-C
2. Any experience on MVVM, VIPER
3. Should have deep knowledge of the iOS SDK and IDE development tools.
4. Experience developing client-server applications using technologies and web services APIs such as JSON, REST.
5. Has hands-on experience with unit testing.
6. Extensive experience in using various architecture, frameworks, and design patterns in designing/refactoring a highly optimized mobile is a must.
7. Solid understanding of the agile development process and experience.
8. Experience working in TDD (Test Driven Development) and CI/CD (Continuous Integration/Deployment) environment is a plus.
9. Implement clean and manageable code incorporating best practices on security
10. Collaborate with cross-functional teams from both offshore and onsite to define, design, and ship new features.
11. Unit-test code for robustness, including edge cases, usability, and general reliability.
12. Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
13. Review code, bug triage and execute multiple releases as per business demand
14. Involvement with API team to design request / response contract
15. MVVM & VIPER is a must
16. Background fetch
17. Swift latest or minimum version 4 and Swift basics

iOS Developer

*H1 is a Spanish fin/proptech that revolutionizes the mortgage market by offering bank-risk approved loans before knowing the house an individual wants to purchase. It also offers a powerful selling tool for real estate agents and developers that helps manage their businesses. From there, H1 is building a community of millions of high credit profile users (individuals + companies) that use the credit marketplace technology to access a multiproduct platform (including banking and non-banking capital and multiple financial and credit scoring products) that becomes a financial partner for individuals and companies as well as a personal documentation encrypted storage for all family or group members (SAAS model).

*H1 is the future of digital banking. 

*Recently capitalized, and in a strong growth phase to expand nationally and into 5 additional countries.

About the Job:

H1 seeks mobile iOS developers with experience on Swift, Apple Certificates and store publish for our development team

In this role, you will report directly to the CTO

Agile based organization, with bi-weekly sprints on long-term project

Responsibilities:

• Build an extraordinary tech product (software) from an user centric perspective, for all the different actors involved with the organization and in direct contact with the technology (clients, management, finance, risk/operations team, commercial team, marketing, etc.) 
• Working with the CTO to build the roadmap and agile based organization required.
• Manage testflight and store publish
• Receive and react to product feedback from all internal and external stakeholders
• Product KPIs, and product releases on a recurring basis
• Producing reports to monitor level of usability, engagement, etc. (product metrics and analytics)
• Contributing to deliver the expected results from a usability and engagement perspective

About You:

• With strong software product background, and extraordinary capabilities in terms of product strategy development and usability 
• 3-6+ years robust experience on developing software products in an agile based organization
• Demonstrated success in bringing new products to market, capturing market share and delivering market leading products and services.
• Clear examples of products managed or developed during his/her career 

• Strategic thinking: you are able to think at the strategic level and make the link with the pixel level 
• Able to work in a flat and transparent manner within a fast paced environment
• Results oriented
• Academic education in tech/product/digital related careers
• High level english (spoken and written). Spanish at any level would be a great plus.
• Entrepreneurial mindset: Is looking for a very ambitious project. Due to the stage of growth kick-off the upside could be extraordinary (a life-time opportunity)

Skills:

• Great flavour towards software products
• High expertise and excellence on software usability and user experience optimization. Expertise in software design
• Sensitivity towards customers and users
• Data driven decision making
• Deep knowledge of the digital world
• Fintech / Proptech / Digital banking background experience will be very positively considered, but not necessarily needed
• Swift, pods and adaptive layout experience, ObjectiveC would be a plus.
• Experience in iPhone and iPad development
• Provisioning profile and Apple Store Connect management
• Experience in working with tech teams, on an agile based style
• Proactive and able to take initiative. Decisive and resolute
• “Out of the box” thinker
• Creative thinker
• Works well in a team and with a wide range of people from different backgrounds and ages
• Organised and methodical
• Succeeds under pressure
• Is able to have fun and keep a positive atmosphere in the team

Location of Headquarters: Madrid, Spain

Tech Hub in India: Office in Bangalore, Karnataka (India). Full tech team between Madrid, Spain + Bangalore, India

This is a unique opportunity to contribute heavily to the growth of an innovative, market-leading Fintech & Proptech company.

Salary Range: 40k-90k Rupees monthly (5 Lakhs - 11 Lakhs per annum)

• Good in Hybrid, Native Mobile development, and associated development frameworks SDKs.
• Good knowledge in one of the design component frameworks library – (React Native UI Components Library, Material UI, Native UI Components library)
• Stronghold in HTML and CSS or related design libraries like bootstrap, fluid layout system, grid layout system, Flexi layout system)
• Stronghold in repo management system – (Preferred GIT)
• Good to have knowledge on deployment and packaging application to play store or app store.
• Good to have knowledge on deployment and packaging application to play store or app store.
• Good at React Native with a minimum of 3 years of experience in IT.
• Good at React Js/Redux is preferred
• Good Hybrid mobile development is required
• Good at databases – Relational or NoSQL.
• Interface with clients via Slack, Zoom, and email.
• Work with modern tools including Jira, Slack, GitHub, etc