Java Backend Engineer

Job Title : Java Backend Developer

Experience : 3 – 8 Years

Location : Pune (Onsite) (Pune candidates Only)

Notice Period : Immediate to 15 Days (or serving NP whose LWD is near)

About the Role :

We are seeking an experienced Java Backend Developer with strong hands-on skills in backend microservices development, API design, cloud platforms, observability, and CI/CD.

The ideal candidate will contribute to building scalable, secure, and reliable applications while working closely with cross-functional teams.

Mandatory Skills : Java 8 / Java 17, Spring Boot 3.x, REST APIs, Hibernate / JPA, MySQL, MongoDB, Prometheus / Grafana / Spring Actuators, AWS, Docker, Jenkins / GitHub Actions, GitHub, Windows 7 / Linux.

Key Responsibilities :

• Design, develop, and maintain backend microservices and REST APIs
• Implement data persistence using relational and NoSQL databases
• Ensure performance, scalability, and security of backend systems
• Integrate observability and monitoring tools for production environments
• Work within CI/CD pipelines and containerized deployments
• Collaborate with DevOps, QA, and product teams for feature delivery
• Troubleshoot, optimize, and improve existing modules and services

Mandatory Skills :

• Languages & Frameworks : Java 8, Java 17, Spring Boot 3.x, REST APIs, Hibernate, JPA
• Databases : MySQL, MongoDB
• Observability : Prometheus, Grafana, Spring Actuators
• Cloud Technologies : AWS
• Containerization Tools : Docker
• CI/CD Tools : Jenkins, GitHub Actions
• Version Control : GitHub
• Operating Systems : Windows 7, Linux

Nice to Have :

• Strong analytical and debugging abilities
• Experience working in Agile/Scrum environments
• Good communication and collaborative skills

Software Engineer (Backend) – Kotlin & React

About Us

We are a high-agency startup building elegant technological solutions to real-world problems.

Our mission is to build world-class systems from scratch that are lean, fast, and intelligent. We are currently operating in stealth mode, developing deeply technical products involving Kotlin, React, Azure, AWS, GCP, Google Maps integrations, and algorithmically intensive backends.

We are building a team of builders — not ticket takers. If you want to design systems, make real decisions, and own your work end-to-end, this is the place for you.

Role Overview

As a Software Engineer, you will take full ownership of building and scaling critical product systems. You will work directly with the founding team to transform complex real-world problems into scalable technical solutions.

This role is ideal for engineers who enjoy thinking deeply about systems, writing clean code, and building products from 0 → 1.

Key Responsibilities

System Development & Architecture

• Design, develop, and maintain scalable backend services, primarily using Kotlin or JVM-based languages (Java/Scala).
• Architect systems that are robust, high-performance, and production-ready.
• Apply strong data structures, algorithms, and system design principles to solve complex engineering challenges.

Full Stack Development

• Build fast, maintainable front-end applications using React.
• Ensure seamless integration between frontend systems and backend services.

Cloud Infrastructure

• Design and manage cloud architecture using AWS, Azure, and/or Google Cloud Platform (GCP).
• Implement scalable deployment pipelines, monitoring, and infrastructure optimization.

Product & Technical Collaboration

• Work closely with founders and product stakeholders to translate business problems into technical solutions.
• Contribute actively to product and engineering roadmap decisions.

Performance Optimization

• Continuously improve system performance, scalability, and reliability.
• Implement efficient algorithms and system optimizations to gain a technical advantage.

Engineering Excellence

• Write clean, well-tested, and maintainable code.
• Maintain strong engineering standards across the codebase.

Required Skills & Qualifications

We value capability and ownership over years of experience. Whether you have 10 years of experience or none, what matters is your ability to build and solve hard problems.

Core Requirements

• Strong computer science fundamentals (Data Structures, Algorithms, System Design).
• Experience with Kotlin or JVM languages such as Java or Scala.
• Experience building modern React applications.
• Hands-on experience with cloud platforms (AWS / Azure / GCP).
• Experience designing and deploying scalable distributed systems.
• Strong problem-solving and analytical thinking.

Preferred / Bonus Skills

• Experience with Google Maps APIs or geospatial integrations.
• Prior startup experience.
• Contributions to open-source projects.
• Personal side projects demonstrating strong engineering ability.

Ideal Candidate

You will thrive in this role if you:

• Take ownership of problems, not just tasks.
• Are comfortable working in high-ambiguity environments.
• Have a builder mindset and enjoy creating systems from scratch.
• Learn quickly and execute with speed and precision.

This Role May Not Be For You If

• You prefer strict task assignments and detailed specifications before starting work.
• You want to focus only on coding tickets without product involvement.
• You prefer large teams with multiple layers of management.

Why Join Us

• Build 0 → 1 products with massive ownership.
• Work in a flat organization with no unnecessary hierarchy.
• Collaborate directly with founders and core product builders.
• Your contributions will have immediate and visible impact.
• Flexible remote work environment.
• Opportunity to shape the technology, culture, and future of the company.

If you are passionate about building powerful systems, solving complex problems, and owning your work, we would love to hear from you.

Wissen Technology is now hiring for Java Developer with hands on experience in Core Java, multithreading, algorithms, and data structure.

We are solving complex technical problems in the financial 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 highly motivated and expert team which has made a mark as a high-end technical consulting.

Required Skills:

Experience - 3+.

Experience in Core Java 5.0 and above, CXF, Spring.

Extensive experience in developing enterprise-scale n-tier applications for financial domain. 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, preferably Sybase database.

Good knowledge of multi-threading and high-volume server-side development.

Experience in sales and trading platforms in investment banking/capital markets.

Basic working knowledge of Unix/Linux.

Excellent problem solving and coding skills in Java.

Strong interpersonal, communication and analytical skills.

Should have the ability to express their design ideas and thoughts.

• Identify bad code practices in Scala and write new analyzers to detect them.
• Improve the coverage of automatically fixable issues.
• Ensure fewer false-positives are reported by the analyzer.
• Work on the internal tools that support analysis runtimes.
• Contribute to open-source static analysis tools.

We’re looking for someone who has:

• Strong foundational knowledge in Computer Science.
• At least 3 years of professional software development experience in Scala and Java.
• Understanding of the nuances of execution of the source code (AST, data flow graphs, etc).
• Familiarity with Scala best practices followed in the industry.
• Native experience with Linux/Unix environment.
• A focus on delivering high-quality code through strong testing practices.

At JFrog, we’re reinventing DevOps to help the world’s greatest companies innovate -- and we want you along for the ride. This is a special place with a unique combination of brilliance, spirit and just all-around great people. Here, if you’re willing to do more, your career can take off. And since software plays a central role in everyone’s lives, you’ll be part of an important mission. Thousands of customers, including the majority of the Fortune 100, trust JFrog to manage, accelerate, and secure their software delivery from code to production -- a concept we call “liquid software.” Wouldn't it be amazing if you could join us in our journey?

We are looking for an experienced, hands-on developer to join an innovative and talented R&D team, responsible for delivering fast and high quality code, using the latest frameworks and technologies.

• Be responsible for all development aspects form design to production of a wide hybrid/ cloud naitive product 
• Write high quality, testable and efficient code in Java and Go
• Initiate and promote new ideas for continuous improvement of the product functionality
• Work closely with other team members as well as mentoring new team members

• 5+ years of software development experience
• Proven deep knowledge of Java or Go
• Deep understanding of relational databases, concurrent programming and performance tuning
• Vast experience with large scale production environments 
• Experience with micro services architecture, multithreading
• Familiarity with Cloud infrastructure, Docker, Kubernetes & CI/CD
• Disciplined approach to testing and quality assurance

Roles & Responsibilities:

• Design and Build API/Micro services using Spring boot.
• Experience in Spring Reactive programming.
• Exposure to docker and containerization
• Developing enterprise grade highly scalable java-based application
• Writing test cases using Java testing framework like JUnit, Mockito.
• Proficient understanding of code version tools, such as Git, SVN
• Displaying initiative and an ability to lead others, and develop applications team disciplined manner
• Participating in application solutions including assisting with planning and architectural design, development, resolution of technical issues, and application rationalization.
• Utilizing and applying robust analytic thinking with the ability to identify, debug, and resolve technical issues.
• Achieving significant contributions within a small team of developers to lead teams and deliver solutions within an Agile methodology, whilst ensuring quality, timeliness and team-wide adherence to good architectural practice and guidelines.
• Good Experience in Application Software Design and Development, Object Oriented Analysis and Design (OOAD), Software Testing and Debugging.
• Conduct peer code reviews