
About Walmart labs
About
WalmartLabs is an American privately held company in Mountain View, California. We help people around the world save money and live better – anytime and anywhere – in retail stores, online, and through their mobile devices. @WalmartLabs has three development centers worldwide: USA, Brazil and India.
The Global Data and Analytics Platforms (GDAP) team @ Walmart Labs in Bangalore provides Data Foundation Infrastructure, Visualization Portal, Machine Learning Platform, Customer platform and Data Science products that form part of core platforms and services that drive Walmart business. The group also develops analytical products for several verticals like supply chain, pricing, customer, HR etc.
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Key Responsibilities:
- Design and develop backend components and sub-systems for large-scale platforms under guidance from senior engineers.
- Contribute to building and evolving the next-generation customer data platform.
- Write clean, efficient, and well-tested code with a focus on scalability and performance.
- Explore and experiment with modern technologies—especially open-source frameworks—
- and build small prototypes or proof-of-concepts.
- Use AI-assisted development tools to accelerate coding, testing, debugging, and learning while adhering to engineering best practices.
- Participate in code reviews, design discussions, and continuous improvement of the platform.
Qualifications:
- 0–2 years of experience (or strong academic/project background) in backend development with Java.
- Good fundamentals in algorithms, data structures, and basic performance optimizations.
- Bachelor’s or Master’s degree in Computer Science or IT (B.E / B.Tech / M.Tech / M.S) from premier institutes.
Technical Skill Set:
- Strong aptitude and analytical skills with emphasis on problem solving and clean coding.
- Working knowledge of SQL and NoSQL databases.
- Familiarity with unit testing frameworks and writing testable code is a plus.
- Basic understanding of distributed systems, messaging, or streaming platforms is a bonus.
AI-Assisted Engineering (LLM-Era Skills):
- Familiarity with modern AI coding tools such as Cursor, Claude Code, Codex, Windsurf, Opencode, or similar.
- Ability to use AI tools for code generation, refactoring, test creation, and learning new systems responsibly.
- Willingness to learn how to combine human judgment with AI assistance for high-quality engineering outcomes.
Soft Skills & Nice to Have
- Appreciation for technology and its ability to create real business value, especially in data and marketing platforms.
- Clear written and verbal communication skills.
- Strong ownership mindset and ability to execute in fast-paced environments.
- Prior internship or startup experience is a plus.
Mandatory (Experience 1): Must have 9+ years in backend engineering with Java, Spring/Spring Boot, and microservices building large and scalable systems with clear production scale or reliability impact (latency, throughput, uptime, etc.) mentioned in the resume
Mandatory (Experience 2): Must have been SDE-3 / Tech Lead / Lead SE for at least 2.5 years (should be there in the resume titles)
Mandatory (Tech skills 1): Strong in DSA, system design, design patterns, and problem-solving
Mandatory (Tech skills 2): Proven experience building scalable, reliable, high-performance distributed systems with architecture ownership and experience in core backend/platform services rather than feature teams
Mandatory (Tech skills 3): Hands-on with SQL/NoSQL databases, REST/gRPC APIs, concurrency & async processing
Mandatory (Tech skills 4): Experience in AWS/GCP, CI/CD pipelines, and observability/monitoring
Mandatory (Communication): Excellent ability to explain complex technical concepts to varied stakeholders
Mandatory (Company) - Top New Age, Fast-scaled, Tech-First Product Companies (Like Series B+ / Unicorn Indian startups, or Tech-first Global companies like Amazon, Google, Microsoft etc)
Mandatory (Stability): Must have stayed for at least 2 years with each of the previous companies
Mandatory (Education): B.Tech in computer science or related field from Tier 1, Tier 2 colleges
Mandatory (Note 1): Education can be ignored for candidates with proven experience in strong, reputed product companies
The key aspects of this role include:
• Design, build, and maintain scalable applications using Python.
• Contribute to the entire implementation process including driving the definition of improvements based on business need and architectural improvements.
• Act as a subject matter expert for Application Software developers and Engineers.
• Handle server-side code for a production platform and contribute to new features
To be the right fit, you'll need:
• More than 4+ years of experience as a software developer in Python, with knowledge of at least one Python web framework such as Django, Flask, etc.
• Good understanding of common design patterns and architecture principles to design reliable and Scalable applications
• Strong communication skills
• Knowledge of databases line NoSQL or MongoDB
• Good to have AWS and Docker or Web services
• Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS
About the Role
We are seeking a passionate and skilled Java + Kotlin Developer to join our growing engineering team. You’ll be responsible for building scalable backend systems and modern Kotlin-based applications, with opportunities to work on both Android and server-side development.
What You'll Do
- Develop and maintain robust backend services using Java and Spring Boot
- Design and implement modern applications using Kotlin (Android or Multiplatform)
- Work on APIs, microservices, and system integrations
- Collaborate with cross-functional teams in an Agile environment
- Write clean, maintainable, and testable code
Key Requirements
- 3+ years of hands-on experience with Java and Kotlin
- Strong grasp of Spring Boot, REST APIs, and microservices architecture
- Experience with Android Development or Kotlin on JVM
- Familiar with Git, Gradle, and CI/CD tools
- Bonus: Experience with Jetpack Compose, Kotlin Coroutines, or Kotlin Multiplatform
Good to Have
- Familiarity with cloud platforms like AWS / GCP
- Knowledge of Docker, Kubernetes, or DevOps practices
- Previous experience in a startup or fast-paced product environment
Job Responsibilities:
* Design, build, and maintain efficient, reusable, and reliable Java code
* Ensure the best possible performance, quality, and responsiveness of the applications
* Identify bottlenecks and bugs, and devise solutions to these problems
* Help maintain code quality, organization, and automatization
* Prepare the technical design of complex technology components
Mandatory Skills:
* Proficient in Java (JDK 1.7) or above JDK 8 preferable, with a good knowledge of its ecosystems with a knack for writing clean, readable Java code, writing reusable Java libraries along with knowledge of concurrency patterns in Java
* Solid understanding of object-oriented programming along with various design and architectural patterns
* Hands on experience with Spring, Spring Boot, JUnit
* Familiarity with concepts of MVC, Microservices, RESTful
Preferred Notice Period - Less Than 1 Month
Preferred Education - Tier 1 Engineering Colleges - IIT/NIT/DTU or similar
Preferred Work Background - Startup Engineering Experience
Job brief
- We are looking for a Java Developer with experience in building high-performing, scalable, enterprise-grade applications.
- You will be part of a talented software team that works on mission-critical applications. Java developer roles and responsibilities include managing Java/Java EE application development while providing expertise in the full software development lifecycle, from concept and design to testing.
- Java developer responsibilities include designing, developing and delivering high-volume, low- latency applications for mission-critical systems.
Responsibilities
- Contribute in all phases of the development lifecycle
- Write well designed, testable, efficient code
- Ensure designs are in compliance with specifications
- Prepare and produce releases of software components
- Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review
Requirements
- BS/MS degree in Computer Science, Engineering or a related subject
- Proven hands-on Software Development experience
- Proven working experience in Java development with Spring Framework
- Hands on experience in designing and developing applications using Java EE platforms
- Object Oriented analysis and design using common design patterns.
- Profound insight of Java and JEE internals (Classloading, Memory Management, Transaction management etc)
- Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2, Hibernate) - Experience in the Spring Framework
- Experience as a Sun Certified Java Developer
- Experience in developing web applications using at least one popular web framework (JSF, Wicket, GWT, Spring MVC)
Your Day-to-Day Tasks Include:
Works in requirements like Engineering, Design, Development, and Deployment. All the tasks involves working with Java, SQL Server and Couchbase.
Build and monitor data pipelines that serve 100+ websites, 150M+ unique impressions daily. Write code that can handle 4x more scale than the given requirement.
Maintain uptime of multiple distributed web applications.
Build data pipelines to pull data from upstream partners like Google.
You Should Have:
Minimum 3 years of experience with Java.
Minimum 2 year of experience with any SQL database (MySql, MSSql, Oracle, DB2, Sybase). Minimum 3 years of experience with web development.
Experience with any NoSql database (MongoDb, Couchbase, CouchDb, DynamoDb). Experience of designing/implementing/maintaining scalable systems.
Experience with any cloud platform (AWS/Azure/GCP).
Good To Have:
Experience with BI and data reporting.
Experience with Elastic search.
Understanding of data warehousing.
Experience in Node.js.
| • Experience of over 5+ years with solid understanding of object-oriented design • Proficient in Java, J2EE and related technologies. • Experienced in using Spring Boot, messaging systems. • Good understanding of relational database performance concepts and usage of ORM frameworks such as Hibernate • Expert understanding of the object-oriented design and programming concepts • Strong Knowledge on Data Structures, Algorithms and Collections. • Solid experience building applications on top of RESTful APIs. • Knowledge/experience with Spring MVC • Stroing knowledge in developing and executing automated unit, functional and integration tests • Good communication and analytical skills. • Strong trouble shooting skills. |












