Java Developer

About the role:

We are looking for a Backend Engineer to join a mature, scaled product platform that is already serving business-critical workflows. This role focuses on enhancing existing backend systems, improving reliability, performance, and scalability, and building new features on top of a well-established architecture.

The ideal candidate is strong at writing production-quality code, debugging complex distributed systems, and knowledgeable about how design decisions impact scalability, availability, and long-term maintainability. You will work closely with cross-functional teams to ensure the platform continues to perform reliably at scale while evolving with business needs.

What you will be expected to do:

• Develop, enhance, and maintain backend services for existing user, inventory, pricing, order, and payment management systems running at scale.
• Write clean, efficient, and highly reliable code using Java 8 and above and Spring Boot 2.7 and above.
• Own and improve production systems with a strong focus on performance, scalability, availability, and fault tolerance.
• Debug and resolve complex production issues involving services, databases, caches, and messaging systems.
• Contribute to low-level design (LLD) and actively participate in high-level architecture (HLD) discussions for new features and system improvements.
• Work with event-driven and asynchronous architectures, ensuring correctness and reliability of data flows.
• Optimize database schemas, queries, indexing strategies, and caching layers for high-throughput workloads.
• Partner with DevOps, QA, and Product teams to support smooth 24×7 production operations.
• Participate in code reviews, design reviews, and incident post-mortems to continuously improve system quality.
• Take end-to-end ownership of backend components, from design and implementation to deployment and production support.

You might be a strong candidate if you have/are:

• Bachelor’s degree in computer science, engineering, or equivalent experience.
• 2+ years of experience building and maintaining backend systems in production environments.
• Strong proficiency in Java with hands-on experience in Spring Boot–based microservices.
• Solid knowledge of data structures, algorithms, and backend problem solving.
• Strong experience with PostgreSQL or other relational databases in high-scale systems.
• Experience building and consuming RESTful APIs and working with asynchronous systems.
• Strong debugging and troubleshooting skills in live production systems.
• Good understanding of software engineering best practices, including testing, code reviews, CI/CD, and release management.
• Clear communication skills and the ability to partner effectively within a team.
• Hands-on experience with Kafka or similar messaging/event-streaming platforms.
• Exposure to distributed systems, microservices architecture, and scaling strategies.

Good to have:

• Experience using Redis, Elasticsearch, and MongoDB in production systems.
• Experience with monitoring, logging, and observability tools (e.g., Prometheus, Grafana, ELK).
• Familiarity with cloud infrastructure and containerized environments (Docker, Kubernetes).
• Experience participating in on-call rotations and handling production incidents.

What Sun King offers:

• Professional growth in a dynamic, rapidly expanding, high-social-impact industry
• An open-minded, collaborative culture made up of enthusiastic colleagues who are driven by the challenge of innovation towards profound impact on people and the planet.
• A truly multicultural experience: you will have the chance to work with and learn from people from different geographies, nationalities, and backgrounds.
• Structured, tailored learning and development programs that help you become a better leader, manager, and professional through the Sun King Center for Leadership.

About Sun King

Sun King is a leading off-grid solar energy company providing affordable, reliable electricity to 1.8 billion people without grid access. Operating across Africa and Asia, Sun King has connected over 20 million homes, adding 200,000 homes monthly.

Through a ‘pay-as-you-go’ model, customers make small daily payments (as low as $0.11) via mobile money or cash, eventually owning their solar equipment and saving on costly kerosene or diesel. To date, Sun King products have saved customers over $4 billion.

With 28,000 field agents and embedded electronics that regulate usage based on payments, Sun King ensures seamless energy access. Its products range from home lighting and phone charging systems to solar inverters capable of powering high-energy appliances.

Sun King is expanding into clean cooking, electric mobility, and entertainment while serving a wide range of income segments.

The company employs 2,800 staff across 12 countries, with women representing 44% of the workforce, and expertise spanning product design, data science, logistics, sales, software, and operations.

JOB DESCRIPTION

Experience: 3-8 years

Wissen Technology is now hiring for a Java Developer - Mumbai with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. - 3-8 years
• Experience in Core Java and Spring Boot.
• Extensive experience in developing enterprise-scale applications and systems. Should possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyze, design, develop and test complex, low-latency client- facing applications.
• Good development experience with RDBMS.
• Good knowledge of multi-threading and high-performance server-side development.
• Basic working knowledge of Unix/Linux.
• Excellent problem solving and coding skills.
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

Work Location - Bangalore (Should be ready to relocate)

Kindly go through the JD & company details if interested please revert with below details & acknowledge with your availability.

Mode of work: Hybrid weekly 2/3 Times Mumbai/ Bangalore location.

While you may already know about Wissen and the company history, here is a quick rundown for you.

INTERVIEW PROCESS:

1. Hacker earth assessment
2. Round 1
3. Round 2
4. Final Round

About Wissen Technology:

• The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015.

• Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains. We help clients build world class products.

• Our workforce consists of 550+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.

• Wissen Technology has grown its revenues by 400% in these five years without any external funding or investments.

• Globally present with offices US, India, UK, Australia, Mexico, and Canada.

• We offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.

• Wissen Technology has been certified as a Great Place to Work®.

• Wissen Technology has been voted as the Top 20 AI/ML vendor by CIO Insider in 2020.

• Over the years, Wissen Group has successfully delivered $650 million worth of projects for more than 20 of the Fortune 500 companies.

We have served client across sectors like Banking, Telecom, Healthcare, Manufacturing, and Energy. They include likes of Morgan Stanley, MSCI, State Street, Flipkart, Swiggy, Trafigura, GE to name a few.

Website : www.wissen.com

Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.

Job Description:

As per our conversation, please find below the job description for your review. 

·       Strong written/verbal communication skills

·       Minimum 4-14 Years of Core Java Programming with Collections Framework, Concurrent Programming, Multi-threading (Good knowledge in Executor service, Fork join pool and other threading concepts)

·       Good knowledge of the JVM with an understanding of performance and memory optimization.

·       Extensive and expert programming experience in JAVA programming language (strong OO skills preferred).

·       Excellent knowledge on collections like, Array List, Vector, LinkedList, HashMap, Hash Table, HashSet is mandate.

·       Exercised exemplary development practices including design specification, coding standards, unit testing, and code-reviews.

·       Expert level understanding of Object-Oriented Concepts and Data Structures

·       Good experience in Database (Sybase, Oracle, or SQL Server) like indexing (clustered, non clustered), hashing, segmenting, data types like clob / blob, views (materialized), replication, constraints, functions, triggers, procedures etc.

·       While you may already know about Wissen and the company history, here is a quick rundown for you.

Job Role: We are seeking a skilled Java Developer to contribute to the development and enhancement renowned banking application, which supports automatic reconciliation and unified data reporting for their clients. This role involves working on high-impact enhancements, data pipeline integration, and platform modernization. The ideal candidate will be a quick learner, self-motivated, and able to ramp up quickly in a fast-paced environment. 

Key Responsibilities:

 Design, develop, and maintain Java-based applications using Java 17 and Spring Boot.

 Implement and manage message routing using Apache Camel.

 Develop and monitor data pipelines using Kafka.

 Support and enhance existing cloud-native applications.

 Work with OpenShift Container Platform (OCP 4) for container orchestration and deployments.

 Utilize Jenkins for CI/CD pipeline automation and management.

 Collaborate with cross-functional teams to integrate multiple data sources into a unified reporting platform.

 Participate in code reviews, unit testing, and performance tuning.

 Troubleshoot and resolve production issues in collaboration with operations teams.

 Document development processes and system configurations.

Required Skills:

 Strong proficiency in Java 17 and Spring Boot frameworks.

 Hands-on experience with Apache Camel for message routing and transformation.

 Solid experience in Kafka development and monitoring tools.

 Good understanding of cloud pipeline architectures and deployment strategies.

 Experience working with OpenShift (OCP 4).

 Familiarity with Jenkins for CI/CD and automated deployments.

 Understanding of cloud deployment platforms (AWS, Azure, or GCP preferred).

 Strong analytical and debugging skills.

 Ability to learn quickly and adapt to evolving project requirements.

Nice to Have:

 Experience in financial services or transaction reporting platforms.

 Familiarity with microservices architecture and containerization best practices.

 Knowledge of monitoring tools (e.g., Prometheus, Grafana).

TAPPP is leading the charge in bringing premium digital entertainment content & live sports to global consumers via its prepaid platform. TAPPP is available across platforms via the Web, Mobile and Tablets. Building out this brand presents significant product and engineering challenges. At the centre of solving those challenges is the TAPPP Product Engineering team which is responsible for the TAPPP product end to end.

We are looking for a coding enthusiast who love working with code and developing software systems.

You will be a part of the core product development team that is responsible for building different components of the TAPPP platform. You will be responsible for designing, coding, reviewing, testing, bug-fixing different modules of the software product that needs to work seamlessly across different environments.

The organization is flat, process is minimal, individual responsibility is big, and there is an emphasis on keeping non-productive influences out of the everyday technical decision making process. Upholding these philosophies will be imperative as we execute our aggressive plan of global expansion over the next 2 years. The position is based in Mumbai, India.

Here is what we are looking for:

• Deep product development experience and sound understanding into these technologies

• Java/J2EE

• Spring

• Hibernate

• RESTful API's

• MySQL

• Tomcat 7

• Exposure on Grails & Amazon AWS will be a plus point

• Strong independent contributor

• An unquenchable desire to learn, attention to detail with a can-do attitude

• Comfortable working in a start-up environment

Key Skills: OpenText AppWorks, OpenText Process Suite (all sub components), Java, JavaScript, XML, SQL, BIRT.

Required Skills:

• Ability to translate complex business requirement into functional technical requirements using OpenText AppWorks (erstwhile Process Suite) low code design and integration framework.
• Knowledge on implementing OpenText AppWorks integration services using REST, SOAP, and Email etc.
• Good understanding of OpenText AppWorks case management features and BPM features.
• Experience in various rules and features like LifeCycle, Activities, User Interface (XForms and Low Code design), SLA, KPI, OTDS, CARS, AppWorks Gateway, Single-Sign-On, External Authentication, SAML, Listeners (File, MQ), SOAP Services, Email integration, HTTP Connector, AppWorks integration with Content/Document Management, etc.
• Experience in full OpenText AppWorks implementation including Entity modelling and Rulesets design.
• Expertise in Java, JavaScript, SQL Server Database.
• Expertise in building Web Services, REST Services API’s (nice to have) Familiar in designing and developing applications in cloud environments (preferably Azure).
• Authentication SAML 2.0, OT.
• Knowledge of OTDS and integration with OTDS
• Exposure to HTML5 ,angular and integration of AppWorks to with angular will be plus
• Exposure to another OpenText platform (ECM, xECM, Captiva, iHUB).

A strong passion for learning and adapting to new technologies.

Java Developer

As a senior technical member of the team, you will be expected to lead the team in the design, architecture, and implementation of high-quality, well-architected software products with a specific focus on cloud, distributed systems, scalability, elasticity and SLA rollups into each component. In this role, you are expected to interact with Senior Architects, Product Managers, Solution Architects and occasionally, with Partners and customers to discuss and collaborate on strategies for enhancing features and coming up with next-generation products. Critical thinking and strong leadership skills are a must as the candidate will be involved in leading a team and making crucial road map decisions.

The Work: What type of work will you be doing? What assignments, requirements, or skills will you be performing on a regular basis?

• 8+ years of hands-on experience with Java-based development projects using RESTful APIs, SpringBoot, horizontal scalability, microservices, high availability principles
• You master the entire life-cycle including research, design, application and deployment architecture, development, testing (dev owns quality), continuous deployment and continuous delivery up until to production.
• You will develop complex, highly available, distributed, cloud-based solutions, and maintain its high level of quality software.
• Solid background in OOP, object and data modelling using SQL and NoSQL databases
• Experience using containers, Kubernetes and developing services on AWS
• Monitor resource allocation, consumption, and performance.
• Engage in service software performance analysis and system tuning.
• Challenge yourself to walk in a different path and to deliver quickly while maintaining a high quality
• Experience with automation tools like Jenkins, GitLab CI
• Excellent communication skills essential

Neptune Ubicom Pvt. Ltd. is looking for passionate and talented Java Developers to be a part of our engineering team. We are hiring for Java Developer inspiring to develop into Full-Stack Developer. If you love building high quality, user-friendly web-applications, then you have our attention!

Your day with us!

As a Java Developer, you will design, create and analyse solutions to various project tasks daily. Your day involves brainstorming and knowledge sharing amongst your teammates. You learn and develop your skills by creating unique solutions daily.

Here are a few of your responsibilities?

End to End Software Design which will involve work on Database, working on Back-end and Front-end, documentation, and testing.

• You will be a part of a functional Java developing team
• You will be assigned a project based on your choice and skill set
• You will get the opportunity to work on a complete product development cycle
• You will be involved in the daily scrum and functional discussion meetings with your German counterparts 
• You will be thoroughly guided and supported to develop your technical skillset.

Technologies you get to use:

• Java+Spring (Back-end)
• TypeScript+Angular (Front-end)
• Git, Jira, Confluence, Maven, etc.
• And many more tools that you'll learn on the job!

What makes you a good fit?

• You have a minimum of 2 years of hands-on experience as a Java Developer. 
• You are someone who wants to explore new horizons for their career and develop into a Full Stack role.
• You possess a Bachelor’s Degree in Engineering with specialisation in CS/IT or equivalent
• You have excellent knowledge of Java
• You have great programming skills
• You have demonstrated a passion for coding through various projects, challenges or extra-curricular activities. Having a programmer portfolio is a major plus
• You have the potential to develop a keen understanding of our culture. And to imbibe it, and be the ambassador of our culture.

Why should you join us?

• Embark on an exciting journey with us! 
• Enjoy being part of a great team of engineers, creating innovative new products
• Learn and acquire knowledge of different technologies
• Participate or/and take a lead on various stages of the on-going projects
• Develop your interpersonal skills every day with new challenges
• We do not believe in the crisp cotton shirt is the only productive work attire. Here at NUPL, you dress smart and decent and we will be good to go
• We follow a strict '5 Day' work week policy. Those weekends are for family, friends, and relaxation
• We offer a competitive leave package, a work from home facility, and a flexible work hour policy to help you attain a great work-life balance
• We offer an environment where you can make suggestions and develop your ideas with the team. In a flat hierarchy, you will have your ideas and opinions heard
• We all know how hard it is to focus on work when craving for food, we have an in house open pantry just for this!
• We offer various opportunities to widen your horizon of knowledge and skills. We also offer support for various courses and certifications
• We provide a competitive benefits package.

Interested to know more about us?

We are a multinational IT Company with our offices based in Germany and India. To know more about us and our work culture check out the link below:

https://www.linkedin.com/company/13597515" target="_blank">www.linkedin.com/neptune-ubi/

Joining: ASAP! ; )

Compensation: We offer a competitive package as per the industry standards. The final package is dependent on one’s performance during the recruitment process. We wish all the best for all the aspiring Full Stack Developers applying for this position!

Qualification & Experience:

• Bachelor of Engineering, preferably in Computer Science/or related fields or Masters, from a premier college
• 2 to 6 years overall software development experience
• Proven hands-on Software Development experience
• Ability to work with an agile mindset
• Having a polyglot mindset to think beyond one programming language/framework to choose the right tech stack for the right problem and exhibit learnability to pick up new technologies
• Proven working experience in Java development/Python development with reasonable exposure to Python/Java respectively or willingness to learn Python/Java
• Hands on experience in designing and developing applications using Java EE platforms/Python Frameworks
• Object Oriented analysis and design using common design patterns
• Good Understanding of Data Structures & Algorithms
• Hands on multi-threading
• Experience in the Relational Databases, SQL and ORM technologies (e.g. JDBC, JPA2, Hibernate, Django ORM)
• Experience with test-driven development