Java Developer

JOB DESCRIPTION

Experience: 3-5 years

Location: Bangalore

Wissen Technology is now hiring for a Java Developer - Bangalore 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. - 3-5 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.

Job Title: Software Engineer / Senior Software Engineer – Java Backend

Experience: 5–10 Years

Location: Pune (Baner) – Work from Office (5 Days a Week)

About the Role :

We are looking for passionate Java Backend Engineers to build highly scalable, high-performance enterprise applications used by millions of users globally. The ideal candidate should have strong experience in Java, Microservices, Payment Gateway integrations, and Checkout platform development, with a product engineering mindset.

Candidates from FinTech, E-commerce, Payments, or Product-based companies will be preferred.

Key Responsibilities :

Design, develop, and maintain scalable backend applications using Java and Microservices.

Build secure, high-performance REST APIs and distributed services.

Develop and enhance Checkout platforms and Payment Gateway integrations for seamless payment processing.

Collaborate with Product, Architecture, QA, and DevOps teams throughout the SDLC.

Participate in system design, architecture discussions, and technical decision-making.

Ensure high code quality through unit testing, code reviews, and engineering best practices.

Build and support CI/CD pipelines and containerized deployments.

Troubleshoot production issues, optimize performance, and improve application reliability.

Mentor junior engineers and contribute to engineering excellence.

Required Skills :

5–10 years of backend development experience.

Strong expertise in Java, Spring Boot, Spring MVC, Hibernate/JPA.

Hands-on experience with Microservices Architecture.

Experience building RESTful APIs.

Strong knowledge of SQL/NoSQL databases.

Experience with Payment Gateway Integration (Stripe, Adyen, Razorpay, Worldpay, PayU, Checkout.com, etc.).

Hands-on experience developing Checkout and Payment Processing workflows.

Understanding of Payment Lifecycle, including Authorization, Capture, Refunds, Settlement, Webhooks, and Transaction Management.

Experience with Docker, Kubernetes, and containerized applications.

Good understanding of CI/CD pipelines using Jenkins or similar tools.

Familiarity with Git, Agile methodologies, and engineering best practices.

Strong problem-solving and debugging skills.

Preferred Skills :

Experience working in FinTech, Payments, E-commerce, or Product-based organizations.

Exposure to Cloud Platforms (GCP/AWS/Azure).

Experience with Kafka or event-driven architecture.

Knowledge of OAuth2, JWT, Keycloak, or similar authentication mechanisms.

Experience with Monitoring & Observability tools (Grafana, Prometheus, ELK, Splunk).

Performance tuning and scalability optimization experience.

Preferred Background :

Candidates from FinTech, Digital Payments, Banking Products, E-commerce, or Product Engineering companies.

Experience working on high-volume transaction systems handling secure payment processing and checkout experiences.

We are looking for a Java Backend Developer to join our team. You will be responsible for developing and maintaining the server-side logic and databases of our applications, ensuring they run smoothly and efficiently.

Responsibilities:

• Write and maintain server-side code using Java.
• Develop and integrate APIs to support frontend functionality.
• Work with databases to store, retrieve, and manipulate data.
• Troubleshoot, debug, and optimize backend performance.
• Collaborate with frontend developers to integrate backend and frontend systems.
• Write unit tests to ensure code quality.

Required Skills:

• Strong experience with Java.
• Familiarity with Spring Boot or other Java frameworks.
• Knowledge of relational databases (e.g., MySQL, PostgreSQL).
• Understanding of REST APIs.
• Experience with version control systems (e.g., Git).
• Basic knowledge of unit testing (e.g., JUnit).

Preferred Skills:

• Familiarity with Microservices and cloud platforms.
• Experience with Docker and containerization.

Strong Senior Backend Engineer profiles

Mandatory (Experience 1) – Must have 5+ years of hands-on Backend Engineering experience building scalable, production-grade systems

Mandatory (Experience 2) – Must have strong backend development experience using one or more frameworks (FastAPI / Django (Python), Spring (Java), Express (Node.js).

Mandatory (Experience 3) – Must have deep understanding of relevant libraries, tools, and best practices within the chosen backend framework

Mandatory (Experience 4) – Must have strong experience with databases, including SQL and NoSQL, along with efficient data modeling and performance optimization

Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs, services, and backend systems, including system design and clean code practices

Mandatory (Domain) – Experience with financial systems, billing platforms, or fintech applications is highly preferred (fintech background is a strong plus)

Mandatory (Company) – Must have worked in product companies / startups, preferably Series A to Series D

Mandatory (Education) – Candidates from top engineering institutes (IITs, BITS, or equivalent Tier-1 colleges) are preferred

Role: Java developer

Location: Gurgaon 

Exp-3-5 yrs

Description:

1. 3+ years of Coding and development experience
   2. Hands on technical experience in must have technical requirements.
   3. Strong working knowledge of Developing, Designing and implementing large scale enterprise applications.
   4. Possess strong analytical skills, organizational skills, attention to detail, and excellent verbal and written communication skills.
   5. Ability to establish and maintain effective working relationships with co-workers, managers and internal and/or external customers.
   6. Knowledge of Agile process
   REQUIRED TECHNICAL SKILL SET
   Must have: AWS, Java, J2EE, Angular, React, Javascript, Spring MVC, Webservices (REST), Servlets, Hibernate
   Nice to have: EXTJS, JBoss Drools Rules Engine, JQuery
   RESPONSIBILITIES
   1. Analyses and evaluates detailed business and technical requirements.
   2. Codes and maintains complex components of information systems.
   3. Develops and performs unit testing and fixes defects identified during testing and re-executes unit tests to validate results.
   4. Ensure code quality by performing technical design and code reviews
   5. Perform integration via Services/Batch with external and internal systems; develop presentation, business/application services and persistence components
   6. Module level ownership and ensure that any development that occurs in that module is as per the agreed solution.
   7. Profiling & Performance turning of Javaapplications

Java Full Stack Developer

Notice Period: 45 days / Immediate Joining

Banyan Data Services (BDS) is a US-based Infrastructure Services Company, headquartered in San Jose, California, USA. It provides the full stack managed services to support the business applications and data infrastructure 

We are looking for a Java Full Stack Developer who has the expertise and deep knowledge of frameworks and tools used in java and who works end to end on the application stack, right from developing the front end, the back-end module & the database.

It's a once-in-a-lifetime opportunity to join our start-up run by a world-class executive team. We are looking for candidates that aspire to be a part of the cutting-edge solutions and services we offer that address next-gen data evolution challenges

Key Responsibilities

· Ability to write high-quality code efficiently

· Design and develop new services or micro-services.

· Participate in planning and management of development process.

· Share architectural design vision with both technical and non-technical team members, including fellow engineers.

· Works on improvements in development toolset including testing frameworks, deployment scripts, and monitoring libraries.

· Experience solving complex problems and implementing solutions for performance and scalability.

· Write clean, well-structured and maintainable code with automated test coverage and corresponding documentation.

· Explore new latest relevant technology, techniques, frameworks, tools, methodologies, and processes.

· Comfortable working with all aspects of software development; including DevOps, quality assurance, research, and design.

Key Requirements

· 3+ years of experience working with Core Java, Spring framework & Spring Boot, Hibernate, Spring Data JPA.

· Knowledge of microservices architecture is mandatory.

· Must have worked on Java Multi-threading & Java NIO.

· At least 1-year of experience with front-end technologies like Angular, React, Vue.js applications.

· Exposure to any of relation database technologies MySQL, Postgres, Oracle, or any No-SQL database.

· Strong knowledge of Web APIs.

· Experience with agile application development.

· Having knowledge of O Auth 2.0 JWT is a plus.

· Proficiency in one or more modern programming languages i. e. Java or J2EE, Python, Go, React.

· Experience in Cloud Technologies including AWS, containers, and Kubernetes.

· Demonstrated experience in performing DevOps for platforms.

· Strong Skill sets in Data Structures & Algorithm in using efficient way of code complexity.

· Passion for learning new technologies and the ability to do so quickly

http://www.banyandata.com" target="_blank">www.banyandata.com 

Job Description

• Design & implement backend APIs 
• Mentor junior developers technically.
• Actively work to reduce tech debt in the backend
• Work towards more stability & scalability of the backend
• Tech stack - Java, AWS, Aurora etc. 

Eligibility

• 4-8 years of product company experience
• OOP implementation experience. Programming language does not matter. We use Java internally but have hired folks from non Java background.
• Hands on experience in SQL, Dynamo DB, Postgres etc preferred. 
• Prior experience building REST APIs
• Advanced understanding of AWS stack
• Prior knowledge of solving problems at scale.