Java Engineer: Senior Developer / Architect

In your role as Software Engineer/Lead, you will directly work with other developers, Product Owners, and Scrum Masters to evaluate and develop innovative solutions. The purpose of the role is to design, develop, test, and operate a complex set of applications or platforms in the IoT Cloud area.

The role involves the utilization of advanced tools and analytical methods for gathering facts to develop solution scenarios. The job holder needs to be able to execute quality code, review code, and collaborate with other developers.

We have an excellent mix of people, which we believe makes for a more vibrant, more innovative, and more productive team.

• A bachelor’s degree, or master’s degree in information technology, computer science, or other relevant education
• At least 5 years of experience as Software Engineer, in an enterprise context
• Experience in design, development and deployment of large-scale cloud-based applications and services
• Good knowledge in cloud (AWS) serverless application development, event driven architecture and SQL / No-SQL databases
• Experience with IoT products, backend services and design principles
• Good knowledge at least of one backend technology like node.js (JavaScript, TypeScript) or JVM (Java, Scala, Kotlin)
• Passionate about code quality, security and testing
• Microservice development experience with Java (Spring) is a plus
• Good command of English in both Oral & Written

Responsibilities:

• Design, develop, and maintain scalable applications using Java/Kotlin Core Concepts and Spring Boot MVC.
• Build and optimize REST APIs for seamless client-server communication.
• Develop and ensure efficient HTTP/HTTPS request-response mechanisms.
• Handle Java/Kotlin version upgrades confidently, ensuring code compatibility and leveraging the latest features.
• Solve complex business logic challenges with a methodical and innovative approach.
• Write optimized SQL queries with Postgres DB.
• Ensure code quality through adherence to design patterns (e.g., Singleton, Factory, Observer, MVC) and unit testing frameworks like JUnit.
• Integrate third-party APIs and develop large-scale systems with technical precision.
• Debug and troubleshoot production issues.

Requirements:

• 3 to 5 years of hands-on experience in Java/Kotlin Spring Boot development.
• Proven expertise in handling version upgrades for Java and Kotlin with confidence.
• Strong logical thinking and problem-solving skills, especially in implementing complex algorithms.
• Proficiency with Git, JIRA, and managing software package versions.
• Familiarity with SaaS-based products, XML parsing/generation, and generating PDFs, XLS, CSVs using Spring Boot.
• Strong understanding of JPA, Hibernate, and core Java concepts (OOP).

Skills (Good to Have):

• Exposure to Docker, Redis, and Elasticsearch.
• Knowledge of transaction management and solving computational problems.
• Eagerness to explore new technologies.

What kind of work will you get?

We are looking for a java developer.

Examples of technical tasks:

Working on our backend SDK to implement APIs that will be consumed by the frontend widgets

Designing APIs for different auth recipes

Architecting auth flows

You will also be given non technical tasks like product brain storming, competitor analysis and writing documentation.

Note: Compensation is as per the applicant's geography

Requirements

Well versed in java with 2+ years of professional experience

Familiar with and comfortable working with Web frameworks like FastAPI, Django and Flask

Familiar with HTTP networking in java

Strong understanding of async and sync modes in java

Bonus:

Contributed to open source, or have your own open source repo with a community and many github stars

Built an in-house authentication or authorization solution or worked with solutions such as Keycloak, Auth0, Ory, Okta etc

If you like our project, please star us on https://github.com/supertokens/supertokens-core">Github

Note: Compensation is as per the applicant's geography

Recruitment Process

Initial Filtering

Apply

Technical Interview (1/2) - 1.5 hours

Discussion on your past work, this will involve sharing your work (code and output) via screen share

Architecture discussion and general programming related live code problems.

You will be allowed to use Google throughout the interview and you will be required to have screen share on.

This call will be with the CTO

Technical Interview (2/2) - 1.5 hour

This will involve a discussion to assess the breadth and depth of your technical knowledge and general questions on various technical topics.

You will not be asked to write any code

This call will be with the CTO

Chat with the Co-Founder - 1 hour

This call will involve a general discussion to assess culture fit

Basic Qualifications

Candidates for this role must have:

• Bachelor’s degree in computer science or a related field
• At least three years of experience writing production code of increasing complexity
• Strong understanding of computer science fundamentals, including algorithms, complexity analysis, data structures, problem solving, and object-oriented analysis and design
• Proficiency in at least one of the following: Java, C, C++, C#, Ruby, Scala, Python
• Experience refactoring code and evolving architectures
• Experience crafting unit, integration, functional and regression tests

 Preferred Qualifications

• Master’s degree in computer science or a related field
• Experience developing in a Linux environment
• Experience applying service-oriented architecture techniques to production use cases
• Experience in developing secure, multi-platform mobile applications

Responsibilities:

• Your primary responsibility as a senior backend engineer will be to architect and develop a scalable and robust micro-services backend with strong Java, Spring(Boot), SQL, AWS/GCP.
• Experience being part of a software development team in an Agile/Lean/Continuous Delivery environment
• Be a key performer in a high-performance product engineering team

Qualifications:

• 2 to 4 years of overall IT experience. Most of this experience in Java (Core Java, Spring boot, Java collections, Java Multithreading)
• Should have experience designing database schemas - SQL and NoSQL.
• Exposure to frameworks like Spring, Hibernate, Play would be a plus
• Experience with microservices architecture would be beneficial.
• Working knowledge of any public cloud (AWS, GCP or Azure)
• Broad understanding and experience of real-time analytics, NoSQL data stores, data modeling and data management, analytical tools, languages, or libraries
• Knowledge of container tech like Docker, Kubernetes would be a plus.
• Bachelor's Degree in Computer Science or Engineering.