L #2703
Applications open
Full-Time Job
Mobile Application Developer
Zepto
About the role
About the job
Software Development Engineer I — Frontend (App)
Location: Bengaluru, India | Experience: 1-2 Years
Responsibilities
- Design and implement multiple large-scale mobile applications with React Native in a fast-paced environment.
- Build pixel-perfect, smooth UIs across both mobile platforms.
- Leverage native APIs for deep integrations with both platforms.
- Diagnose and fix bugs and performance bottlenecks for an experience on par with native applications.
- Participate in SDLC processes, streamlining, POC development, Functional Estimation, Performance Tuning, environment setup, etc.
- Set up best practices for development and champion their adoption.
- Mentor young minds and foster team spirit.
- Should be able to do app profiling for a smooth user experience.
Requirements
- 1-2 years of experience building mobile applications.
- Proficient with React Native with a minimum of 1 year of experience.
- Experience in developing and delivering large-scale Android and iOS mobile applications via React Native.
- Hands-on experience with React Query or a similar library.
- Ability to work through new and complex React Native issues and contribute to libraries as needed.
- Engineers who are obsessed with optimisations and are ready to go the extra mile to deliver the best app experience to the customers.
- Firm grasp of the JavaScript language and its nuances, including ES6+ syntax and TypeScript.
- Experience in writing unit testing code with libraries like Jest, Enzyme, Jasmine, Mocha, etc.
- Experience in at least one native platform, Android (Java/ Kotlin) or iOS
- Good knowledge of monitoring and tracking down app crashes and bugs using advanced tools.
- Worked in a startup environment with high levels of ownership and commitment.
- A growth mindset and passionate about building things from the ground up, and most importantly, you should be fun to work with.
Eligibility & process
Who can apply
Seniority: Entry level. Employment type: Full-time
Skills & stack
Selection process
Details are shared by the recruiter after shortlisting.
Prep kit
20 resourcesStudy material 4
Aptitude Practice Questions & Mock Tests
Curated logical, quantitative, and verbal reasoning problems for the initial online screening round.
Company-Specific Interview Preparation Corner
Detailed interview experiences, exam formats, and previous test questions for Zepto and tech roles.
Technical Placement Question Bank
High-yield coding cheat sheets, core CS fundamentals (OOP, DBMS, OS, Networks), and rapid revision guides.
Algorithm, DSA & Live Code Debugger Practice
Hands-on problem sets to improve coding speed and step-by-step memory debugging.
Company-specific guides 4
APTITUDE & LOGIC
Aptitude Practice Questions & Online Mock Tests
Curated logical, quantitative, and verbal reasoning problems to sharpen reasoning skills required for the initial screening test.
COMPANY GUIDE
Zepto Interview Preparation Corner
Comprehensive guide covering typical interview formats, common questions, and preparation tips for Zepto and off-campus tech roles.
MOCK TESTS & PAPERS
Comprehensive Interview Prep Resources & Syllabus
Collection of previous year questions, company-specific test patterns, and interview experiences for technical and HR rounds.
CODING PRACTICE
Algorithm and Data Structure Problem Set
Practice problems to improve coding proficiency and algorithm problem-solving speed for technical rounds.
Likely coding questions 4
Round-wise strategy 4
Round 1: Online Assessment (OA)
Aptitude, Quantitative Logic & 2 Coding Problems
Focus on accuracy and speed. Practice arrays, strings, and standard arithmetic puzzles.
Round 2: Technical Interview 1
Core Tech Stack (Java, JavaScript, TypeScript, Kotlin, React, React Native, Android, iOS) & Live Code Tracing
Explain your thought process aloud. Analyze time & space complexities before coding.
Round 3: System Design & Problem Solving
Database Schemas, APIs & Architecture Basics
Clarify edge cases, diagram schemas cleanly, and discuss scalability trade-offs.
Round 4: HR & Cultural Fit Discussion
Zepto Core Values, Learning Agility & Offer Terms
Demonstrate passion, strong communication, and readiness for full-time collaboration.
Technical questions 5
Explain OOP (Object-Oriented Programming) principles with real-world examples in Java. Answer
Model answer: 1. Encapsulation (data hiding via private fields/getters). 2. Abstraction (hiding implementation complexity). 3. Inheritance (code reusability). 4. Polymorphism (method overriding/overloading).
What is the time and space complexity of QuickSort vs MergeSort? Answer
Model answer: QuickSort: Average O(N log N) time, O(log N) space. Worst O(N^2). MergeSort: Guaranteed O(N log N) time, but requires O(N) auxiliary space.
Explain the difference between SQL Indexing (B-Tree vs Hash) and when not to use an index. Answer
Model answer: Indexes speed up SELECT queries via B-Trees. However, they slow down INSERT, UPDATE, and DELETE operations because indexes must be updated on disk. Avoid on low-cardinality columns (e.g., boolean flags).
What happens under the hood when you enter a URL in a browser? Answer
Model answer: 1. DNS lookup (resolves IP). 2. TCP 3-way handshake (SYN, SYN-ACK, ACK). 3. TLS negotiation for HTTPS. 4. HTTP GET request sent. 5. Server responds with HTML/CSS/JS. 6. Browser renders DOM & CSSOM tree.
What is the difference between REST and GraphQL APIs? Answer
Model answer: REST uses multiple fixed endpoints with possible over/under-fetching. GraphQL uses a single endpoint allowing clients to query exact fields in a single request.
Behavioural & HR questions 3
Why do you want to join Zepto as a Mobile Application Developer?
Highlight Zepto's market reputation, recent tech innovations, and how your skills in Java directly solve their team's objectives.
Highlight Zepto's market reputation, recent tech innovations, and how your skills in Java directly solve their team's objectives.
Describe a challenging bug or academic project roadblock and how you resolved it.
Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
How do you handle strict deadlines or sudden scope changes?
Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.
Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.
Competitive Package
Bengaluru, India
Seniority: Entry level. Employment type: …
