Senior iOS Developer

About the Role

We are looking for a strong iOS Developer with 3–5 years of professional experience in building scalable, high-performance native applications. The ideal candidate has deep expertise in Swift, strong architectural understanding (MVVM, MVVM-C, VIPER, Clean Architecture), experience contributing to SDKs or modular systems, and a strong foundation in clean coding principles and core computer science fundamentals.

You will take ownership of core modules, ensure high engineering standards, and build reliable, maintainable, and performant mobile systems.

Roles & Responsibilities

• Design and build scalable native iOS applications using Swift, UIKit and/or SwiftUI.

• Architect modular features using MVVM / MVVM-C / VIPER and Clean Architecture principles.

• Contribute to reusable mobile modules or SDK components with clear abstractions and API boundaries.

• Write clean, maintainable, and well-structured code following SOLID principles and best practices.

• Ensure high performance, responsiveness, and efficient memory management.

• Implement robust networking layers integrating RESTful APIs with proper error handling and security considerations.

• Identify bottlenecks, debug crashes and memory leaks, and optimize runtime performance using profiling tools.

• Maintain code quality through reviews, refactoring, and documentation.

• Support CI/CD workflows, version upgrades, and App Store releases.

Must-Have Skills

• 3–5 years of hands-on iOS development experience using Swift.

• Strong understanding of architectural patterns: MVVM, MVVM-C, VIPER, Clean Architecture.

• Experience building modular components or contributing to iOS SDKs.

• Solid understanding of OOP concepts, SOLID principles, and writing clean, extensible code.

• Strong problem-solving ability with good exposure to Data Structures and Algorithms.

• Solid understanding of concurrency (GCD, async/await), threading, and performance optimization.

• Strong knowledge of memory management (ARC), retain cycles, and runtime behavior.

• Experience writing unit tests (XCTest) and building testable systems using dependency injection.

• Proficiency with Git and modern dependency managers (SPM, CocoaPods, Carthage).

• Experience integrating RESTful APIs and working with backend systems.

• Hands-on experience with App Store submission and release processes.

Good to Have

• Experience with dependency injection frameworks (e.g., Swinject).

• CI/CD exposure (Fastlane, Jenkins, GitHub/GitLab pipelines).

• Experience profiling and debugging performance issues in production environments.

• Exposure to AI/ML integrations (CoreML, Vision, or third-party AI services).

We enable humans & machines with internet connectivity at a price that they can afford.

The inspiration for Wifi Dabba came from the founders working together for the last decade in the mobile application industry and realising the biggest reason for user churn being access to cheap and affordable internet access. From having worked on ground onboarding users and facing poor connectivity issues all the time, we took it on ourselves to fix the internet access problem for the common citizen.

At Wifi Dabba (YC W17), we are building a low cost, scalable & distributed Wi-Fi infrastructure to connect next billion users online. We do this by deploying a grid of lasers (Free Space Optics) over the cities & town and bring cheap and fast internet for everyone. We enable anyone to buy 1 gig of data access at a time at a price they can afford. Sachetization of internet access is the foundation to rebuilding internet for all. We do this by leveraging crypto and blockchain to truly make internet infrastructure ownership distributed — our vision is to be connectivity layer for the Web3 world.

• You will get the chance to be an early team member at a fast-growth YC startup.
• You get to define the future of telecom infrastructure ownership and operations.
• We’re a tight-knit team where you'll learn a ton and have ownership.
• Opportunity to build for the next billion users.

• Strong engineering background preferably in Computer Science
• Experience architecting, developing, and testing iOS application code end-to-end
• Strong knowledge of iOS UI design principles, patterns, and best practices
• Experience with AWS services
• Experience working with remote data via REST and JSON
• Experience working with mobile analytics
• Knowledge of Apple’s design principals and application
• Knowledge of code versioning tools like GIT, SVN.
• Experience in building user interfaces for mobile apps.
• Participate in design discussions with business users, web producers and engineering teams.
• Perform requirements analysis, high-level design, effort estimation for new business requirements and feature enhancements.
• Write clean, concise, and sustainable code.
• Team player who enjoys collaborative effort.

• Entrepreneurial mindset (we encourage all employees to be future founders and this can be a great stepping stone towards that)
• Customer-centric and passionate about working in a small & focused team
• Previous experience building/working in telecom software or infrastructure
• Previous experience building web3 project - DeFi / Blockchain infrastructure
• Previous experience at a high-growth, fast-paced startup

We are looking for an iOS application developer who possesses a passion for pushing mobile technologies to the limits and will work with our team of talented engineers to design and build the next generation of our mobile applications.

MUST BE ABLE TO WORK AT OUR OFFICE IN : Sec. 63, Noida, UP 201301

Responsibilities:

• Design and build advanced applications for the iOS platform
• Collaborate with cross-functional teams to define, design, and ship new features.
• Unit-test code for robustness, including edge cases, usability, and general reliability.
• Work on bug fixing and improving application performance.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• Very good experience with Objective-C and iOS SDK
• Good working knowledge in Cocoa Touch
• Experience with memory management and caching mechanisms specific to mobile devices.
• Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics, and Core Text.
• Experience in Payment gateway integration in mobile apps.
• A portfolio of iOS in the app store is a plus.
• Git & Gerrit.
• UI & UX experience.
• Experience in Swift4 and above version of Swift.
• REST API association, Locations, and Map API.

Required Candidate profile

• A minimum of 3 years of experience in iOS app design and development
• Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics and
  Core Text
• Experience in imaging/pdf manipulation sdk will be preferred.
• Working experience with PDFTron sdk
• Experience with third-party libraries and APIs
• Working knowledge of the general mobile landscape, architectures, trends, and emerging
  technologies
• Solid understanding of the full mobile development life cycle

Desired Candidate Profile

• Should have 5+ years of professional work experience designing outstanding Mobile App on iOS Platform
• Have worked on an outstanding iOS App before
• Proficient understanding of iOS Concepts
• Proficiency in Objective-C and/or Swift
• Excellent problem-solving skills
• Excellent interpersonal skills and the ability to build good working relationships.
• Must be self-motivated to prioritize and manage workload and meet critical project milestones and deadlines.
• Able to effectively collaborate with a team as well as take initiative and work independently to solve problems
• Should have min 65% in B.E./ B.Tech/ M.Tech

• We run functional teams based on the SCRUM methodology and are a fairly Agile environment, with 2-week sprints and teams with a minimum of 2 developers (preferably 3) plus a Platform Owner.
• Sprints cannot be interrupted and work is planned out well in advance to keep stress down to a minimum.

• Line by line code reviews for every pull request on Gitlab maintains code quality, and keep everyone in the loop & learning.
• At least 2 people working together on every project (collaborating not pairing)

• Swift is strongly preferred
• Experience with clean architecture, MVVM, and other design patterns
• Master Storyboards and auto layouts
• Familiar with RESTful web service
• Experience with Static Frameworks
• Great logic and problem-solving skills
• Practical understanding of Continuous Integration and Delivery

• A resume in pdf format. Include into your resume the links to software, mobile apps, your coding samples so we can see proof of your talents.

About us:

Zapit aims to be a multi-platform single app solution for universal payments using blockchain technology. Our goal is to spread economic freedom by pushing the boundaries of p2p payments by introducing non-custodial decentralised financial services.

We are looking to build smart contracts that can be deployed for real world use cases such as insurances, loans and other useful decentralised financial products. We are also working towards building an economy where concepts like company shares, gift cards, discount coupons, loyalty points and more can be tokenised including NFTs in the form of art, music, gaming items, event tickets, design concepts and more.

Responsibilities:

• Collaborate with designers to develop a visually appealing, responsive & optimised app for mobile, web & desktop platforms.
• Use Flutter framework to develop great user experiences with effective workflows.
• Build reusable code and robust libraries of UI components.
• Write clean, maintainable and documented code with solid test coverage.
• Participate in the product roadmap discussions.
• Design, develop, test, deploy, maintain, scale and improve code base.
• Implement methods to understand user interaction and engagement on the product through metrics.

Requirements:

• Minimum experience of 1.5 years in Dart/Flutter development with a good knowledge of native Android & iOS development.
• Good understanding of Data Structures and Algorithms.
• Passionate and opinionated about beautiful design with an eye for detail.
• Should be updated with latest front end technologies and trends.
• Proficient knowledge of cross-browser compatibility issues and handle graceful degradation.
• Should have delivered multiple products.
• Interest in building things from scratch.
• Willingness and affinity to learn.
• Excellent communication skills.
• Self-motivated, work well independently or as part of the team.

Our Stack:

We tend to work with Javascript, Typescript, Dart, Flutter, gRPC, Express.js, Heroku, NodeJS, MongoDB, AWS, Solidity, Bitcoin Script.

Good-to-Have:

• Open Source contributions.
• Interest in Cryptocurrency/Payments space.
• Familiar with Git and GitHub/GitLab

Incentives:

• Equity in the company
• Get to work in a distributed team.
• Handsome pay. (Competitive)
• Fast opportunities for personal and professional learning and growth, tons of autonomy and responsibility, results-driven environment, international team, exposure to a wide array of ecosystems and trailblazing technology, flexible work hours.

Please include something beautiful you’ve implemented in the past if possible!

If you have examples of a project where you iterated after learning new things from potential users, please talk about that!