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About the Role
We are looking for a Senior iOS Engineer to build and own the trading experience on iOS in Swift — real-time
data via Combine, interactive charting, smooth animations, and the premium feel expected of a financial
application. What We’re Looking For
You have shipped native Swift apps that handle real-time data, complex reactive pipelines, and
performance-sensitive UI. You know UIKit and SwiftUI deeply and can bridge between them confidently. Ideally, you have worked on trading, fintech, or data-intensive iOS products. You take ownership of your domain, drive
technical decisions, and hold yourself and your team to a high quality bar. What You’ll Do
• Own the mobile trading experience on iOS — module architecture, navigation, performance, and
end-to-end quality. • Build and optimize real-time data rendering using Combine — WebSocket streams, subscription
management, and efficient SwiftUI/UIKit binding. • Integrate complex WKWebView-based components with JavaScript–Swift message passing. • Collaborate with product and design to deliver polished, trust-building interfaces for a financial product. • Define iOS engineering standards — architecture patterns, testing strategy, accessibility, and
performance benchmarks. • Drive code reviews, mentor team members, and champion best practices across the iOS team. • Participate in stabilization and release cycles — Instruments profiling, device matrix testing, and
regression analysis. Must-Have
• 4+ years native iOS development with Swift in production apps on the App Store. • Strong Combine experience for reactive programming, data streams, and async coordination. • Experience with both SwiftUI and UIKit — ability to compose views and bridge between the two. • Experience with real-time data rendering and WebSocket integration on iOS. • Experience integrating WKWebView with JavaScript bridge (WKScriptMessageHandler). • Understanding of iOS architecture patterns — MVVM, Coordinator, Clean Architecture. • Experience with push notifications (APNs), deep linking, and Universal Links.
Nice-to-Have
• Prior experience building trading, brokerage, or fintech iOS apps. • Experience with charting library integration on iOS. • Experience building custom UI components — animated charts, calendar views, card-based layouts. • Knowledge of server-driven UI (SDUI) patterns for dynamic rendering. • Familiarity with accessibility best practices (VoiceOver, Dynamic Type). Tech Stack
Language Swift 5.9+
UI SwiftUI + UIKit (hybrid)
Reactive Combine, async/await
Real-time URLSessionWebSocketTask / Starscream, Combine streams
Charting Charting library via WKWebView bridge
Testing XCTest, XCUITest (E2E), Instruments profiling
Job Summary
We are seeking a highly skilled iOS / Android Developer with strong hands-on experience in Kotlin Multiplatform Mobile (KMM) and Compose Multiplatform (CMP) to join our mobile development team. The ideal candidate will be responsible for building and maintaining cross-platform mobile applications while ensuring high performance, scalability, and seamless user experience across iOS and Android platforms.
Key Responsibilities
- Design, develop, and maintain cross-platform mobile applications using Kotlin Multiplatform Mobile (KMM) and Compose Multiplatform (CMP).
- Build and manage shared business logic, networking, and domain layers across iOS and Android.
- Develop native components using Swift & iOS SDK and Android SDK as required.
- Integrate RESTful APIs, handle JSON parsing, and manage networking using Ktor.
- Ensure application performance, memory optimization, and effective debugging across both platforms.
- Collaborate closely with backend, Android, iOS, QA, and product teams to deliver high-quality solutions.
- Participate in code reviews, technical discussions, and architecture decisions.
- Manage app deployment processes, including App Store and Play Store submissions, certificates, signing, and provisioning profiles.
Required Skills & Qualifications
- 4+ years of professional experience in mobile application development.
- Strong hands-on experience with Swift & iOS SDK and Android SDK.
- Mandatory hands-on experience with Kotlin Multiplatform Mobile (KMM) and Compose Multiplatform (CMP).
- Solid understanding of mobile app architectures such as MVC and MVVM.
- Experience with REST APIs, JSON parsing, and Ktor for networking.
- Good knowledge of performance optimization, memory management, and debugging techniques.
- Familiarity with app publishing processes, certificates, code signing, and provisioning profiles.
- Ability to work independently and deliver within timelines.
- Strong communication and collaboration skills.
Preferred Candidate Profile
- Immediate joiner or candidates available on short notice.
- Experience working in agile or fast-paced product environments.
- Strong problem-solving and analytical mindset.

iOS Developer responsible for developing app from scratch.
We are looking to recruit a candidate for a role that will require:
- Translate design and wireframes into code
- Design, build, and maintain high performance, reusable, and reliable code
- Identify solutions through research and collaboration that resolves the root of problems as they arise
- Unit testing code
- Experience with cloud message APIs and usage of push notifications
Requirement
∙ 2+ years’ strong development experience in iOS
∙ Experience using RESTful web services within mobile applications
∙ Proficient with Swift and Cocoa Touch
∙ Knowledge of iOS UI/UX standards
∙ Understanding of Apple’s design principles and interface guidelines
∙ Experience with code versioning control, such as bitbucket/git
Education: Engineering
Work experience: 2 years relevant experience
Compensation: Based on Industry Standards-Flutter: To build cross-platform mobile apps for Android, IOS, and Web. Should include making responsive UIs to efficiently query data and manage states in an optimized manner
-Design and Build sophisticated and highly salable apps using Flutter.
-Translate and Build the designs into a high-quality, responsive UI code.
-You will be writing readable and clear code using Dart that can be extensively documented for future use and upgrades.
-Write unit and UI tests to identify malfunctions.
-Design interfaces to improve user experience
-Research and suggest new mobile products, applications, and protocols.
-Stay up-to-date with new technology trends.
-Knowledge and understanding of Firebase.
-Experience in working with remote data via REST and JSON.
-Work on bug fixing and improving application performance.
-Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
Skills:
-Good working knowledge of Database concepts
-High quality & optimized code
-Strong knowledge of JSON & the REST API is an added advantage
Requirements:
-Minimum 1 to 3 years of experience
-Good communication
-Willingness to learn new technology
-Analytical skills
-Team player
-Quick & Independent-learner
-Problem-solving skills
Work as part of a small team to build React Native iOS / Android applications for clients.
Architect, build and maintain excellent React Native applications with clean code.
Implement pixel perfect UI's that match designs.
Implement clean, modern, smooth animations and transitions that provide an excellent user
experience.
Integrate third-party API's.
Write unit and integration tests.
Release applications to IOS and Google Play stores.
Work with native modules when required.
Work as part of a small team, which will include other React Native developers, a project
manager, QA professional, and a designer.
Complete sprints and participate in sprint retrospectives and daily standups.
Assist with building estimates.
Interface with clients via Slack, Zoom, and email.
Track your time throughout the day using Toggle.
Work with modern tools including Jira, Slack, GitHub, Google Docs, etc.
Be part of a community of React Native developers who share knowledge and help each
other as problems arise.
Follow Full Stack's detailed development process
Skillset: React Native Developer
Experience: 3-6 yrs
Location: Delhi - WFH
JD:
Skills
3+ years experience in React-Native based app development is a must.
Must have published at least 1 major React-Native app
2+ years experience in building consumer facing Mobile Applications in React or React
Native.(layouts, animations, etc.)
Bachelor's degree in Computer Science or equivalent practical experience.
Strong fundamentals around Redux lifecycle, store and middleware.
Excellent hands on knowledge of Javascript, HTML, CSS/CSS3, JQuery is must.
Knows how to embed React-Native in a native(iOS/Android) component and vice versa
Strong hold on JS/ CSS fundamentals and debugging skills
Strong UX/UI design exposure and experience in making apps work intuitively and with pixel
perfect interfaces.
Experience of customizing libraries
Good understanding of Design and Architecture Patterns
Strong focus on app performance
Experience with Git, Github, Pull Request and Rebasing .
Experience and understanding of large and complex code bases and architectures.
Highly accountable and takes ownership, with a positive attitude, and is a lifelong learner.
What we are building?
Businesses need to manage a lot of user infrastructure like authentication, identity verification, user management, security and fraud prevention. Developing these solutions in-house can increase the go to market time, deviation from solving key problem, security lapses and frictional user journeys and lead to business losses. To cater these requirements of an expanding business we provide an one stop solution.
Our mission is to remove technical barriers for the companies when it comes to user infrastructure and create seamless structure for integration with our platform that handles security and provides simple and secure access to digital assets.
Sign3 is looking for an Android Developer.
What you will do?
- Own Android SDKs, working hand-in-hand with the founding team
- Design and build delightful user interfaces for native apps on Android
- You will be (co-) responsible for our software development kit (SDK) for Android
- Building mobile apps in both Swift and Kotlin.
- You work independently on your own code, but you also spend time collaborating with others.
- You are involved in all stages of app development and contribute to the roadmap.
- You get the freedom to experiment with new Android technology.
- Ownership — advocate for projects and solutions that need to be launched ground up.
Experience
- Min 2 to 4 years in developing Android applications in Java / Kotlin / C++ /
- Gradle/Groovy.
- Worked on SDKs/Frameworks.
- Strong understanding of software design patterns as well as Android specifics.
- Experience with authenticated sessions using authentication tokens and have at-least
- fundamental knowledge of app security.
- Good to have:-
- Experience with Cross-platform frameworks is a plus (React Native, Flutter, Cordova,
- Xamarin).
- Have implemented security standards and guides.
- Experience building applications at scale.
- Experience with third-party libraries and APIs like Mobile Vision, MLKit and/or
- Camera API.
- Good understanding of garbage collection, design patterns and continuously
- discover, evaluate, and implement new technologies to maximise development
- efficiency.
- Unit-test code for robustness, including edge cases, usability, and general
- reliability
Wanted React Native Developer
We are looking for Junior and Senior React Native developer interested in building mobile apps for both the iOS and Android platforms.The candidate should be able to build high-quality, and performant applications with good coding standards and according to design.The developer must be skilled in development, writing clean and scalable code, and documenting functionality.
Experience
1 - 3 years
Education
Any Graduate
Location
Hyderabad
Candidate Requirements
- Experience with React Native skills such as Redux/Mobx, GraphQL, Animation, Authentication, etc.
- Must have built Mobile apps that are deployed to App store and google play store.
- Hands-on experience in using Hooks for functional components with the State, Pure Components , etc.
- Familiarity with native build tools, like XCode, Gradle Android Studio, IntelliJ
- Experience with automated testing suites, like Jest or Mocha
- Should have the ability to integrate third-party libraries and APIs.
- Familiarity with code versioning tools such as Git.
- Good knowledge of React Native and its core Principles.
Key Skills
- React Native
- Mobile Application Development
- IOS Development
- Javascript
- Android Development
- React.Js
1. Design Patterns MVC, MVVP, MVVM (MVC != Massive View Controller )
2. Data Structures and Algorithms
3. Writing bridge code in Swift.
4. Backrground jobs
5. VOIP Notifications
6. Delegates
7. Using NIB files
In addition, you should be open to learning and able to challenge yourself and push yourself to accompish more in less time
Other skills include
1. Being a team player.
2. Being a good person








