Platform Engineer (java Full stack)

Job Summary:

We are seeking highly skilled Java Developers with hands-on experience in developing 

enterprise-scale applications, preferably within the financial services domain. The role 

requires expertise in Core Java, Microservices, and high-performance server-side 

development.

Key Responsibilities:

• Design, develop, and maintain enterprise-scale n-tier applications in the financial 

domain.

• Develop complex, low-latency, client-facing applications with a focus on performance 

and scalability.

• Work with Microservices architecture, Data Structures, OOPs, Algorithms, and 

Multithreading.

• Perform high-level and low-level design for critical applications.

• Collaborate with cross-functional teams to define, design, and deliver new features.

• Ensure best practices in coding, architecture, and application performance.

Requirements:

• Strong experience in Core Java 5.0 and above, Spring, and CXF.

• Extensive experience in enterprise application design patterns and architecture.

• Strong development experience with RDBMS (preferably Sybase).

Experience: 7+ years

Location: Mumbai

Mode of Work: Hybrid

• Hands-on expertise in multithreading and high-volume server-side applications.

• 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.

• Ability to express design ideas and collaborate effectively with teams

JOB DESCRIPTION

Experience: 4+ years

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. 4+ 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.

Minimum 3+ Years of Core Java Programming with Collections Framework, Concurrent Programming, Multi-threading (Good knowledge in Executor service, Fork joins 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.

Role Type

Backend Engineering (Java + Distributed Systems/API)

Role Summary

We are looking for an experienced Java Backend Engineer who has strong hands-on expertise in multithreading (concurrency), distributed systems, transactional processing, and backend design. The role requires someone who can design, develop, and optimize services running in high-volume, low-latency enterprise environments.

Key Responsibilities

· Design and implement scalable backend services using Java (8/11/17) and Spring Boot.

· Build high-performance systems leveraging multithreading, concurrency controls, and asynchronous programming.

· Work on distributed system components such as messaging, caching, service discovery, and consistency models.

· Implement robust transaction handling using ACID principles, isolation levels, distributed transactions, and rollback mechanisms.

· Develop RESTful and event-driven APIs following best practices for security and reliability.

· Participate in architecture discussions, design reviews, and technical planning.

Must-Have Skills

· Strong Java 8+ (Streams, functional programming, Collections)

· Spring Boot, Spring MVC, Spring Data

· Concurrency & multithreading (executor frameworks, locks, synchronization, concurrent collections)

· Transaction handling: JPA/JDBC, Spring transactions, isolation levels

· Distributed systems: microservices communication, Kafka/RabbitMQ, caching, resilience patterns

· System design: scalability, load balancing, fault tolerance

JOB DESCRIPTION

Experience: 3-10 years

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. 3-10 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 DESCRIPTION

Experience: 4 to 10 years

Location- Bangalore/ Mumbai

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. 4 to 10 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 DESCRIPTION

Experience: 4-9 years

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. 4-9 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.

Strong Backend Software Engineer Profile with strong Core Java expertise

2

Mandatory (Experience 1): Must have 2+ years of hands-on backend software engineering experience.

3

Mandatory (Experience 2): Must be able to design and implement moderately complex features with minimal supervision, and contribute to system design and architecture discussions.

4

Mandatory (Experience 3): Must be comfortable owning business-critical production components — maintaining connectors, handling customer escalations, security fixes, bug fixes, and building new features end-to-end.

5

Mandatory (Tech skill 1): Must have strong, current Core Java depth with solid, clear coding fundamentals — Java is the primary skill for this role. Deep hands-on core engineering strength matters more than framework knowledge.

6

Mandatory (Tech skill 2): Must have strong core backend engineering fundamentals and experience with scalable systems (connectors handle millions of events/data points daily across customers).

7

Mandatory (AI Fluency): Must have demonstrated, hands-on use of AI coding assistants (Claude, GitHub Copilot, Cursor, etc.) as a core part of the daily workflow — scaffolding, writing tests, reviewing code, and debugging — with the ability to write precise, effective prompts for production-quality output, decompose tasks so AI assistance is effective, and critically evaluate AI-generated code for correctness, security, and standards before merging.

8

Mandatory (Database): Hands-on database / JDBC integration experience in a production environment.

9

Mandatory (Company): Must come from a product company background (B2B SaaS or B2C both acceptable).

10

Mandatory (Note1): This is a 3-month contract role. Candidate must be comfortable with the contract engagement and able to join immediately (urgent — onboarding within ~a week)

 Experience in Core Java, Spring Boot. 

• Experience in microservices. 

• Extensive experience in developing enterprise-scale systems for global organization. Should possess good architectural knowledge and be aware of enterprise application design patterns. 

• Should be able to analyze, design, develop and test complex, low-latency client-facing applications. 

• Good development experience with RDBMS in SQL Server, Postgres, Oracle or DB2 

• Good knowledge of multi-threading 

• Basic working knowledge of Unix/Linux 

• Excellent problem solving and coding skills in Java 

• Strong interpersonal, communication and analytical skills. 

• Should be able to express their design ideas and thoughts

Strong Backend Software Engineer Profile with strong Core Java expertise

2

Mandatory (Experience 1): Must have 2+ years of hands-on backend software engineering experience.

3

Mandatory (Experience 2): Must be able to design and implement moderately complex features with minimal supervision, and contribute to system design and architecture discussions.

4

Mandatory (Experience 3): Must be comfortable owning business-critical production components — maintaining connectors, handling customer escalations, security fixes, bug fixes, and building new features end-to-end.

5

Mandatory (Tech skill 1): Must have strong, current Core Java depth with solid, clear coding fundamentals — Java is the primary skill for this role. Deep hands-on core engineering strength matters more than framework knowledge.

6

Mandatory (Tech skill 2): Must have strong core backend engineering fundamentals and experience with scalable systems (connectors handle millions of events/data points daily across customers).

7

Mandatory (Tech skill 3): Must have microservices experience.

8

Mandatory (AI Fluency 1): Must have demonstrated, hands-on use of AI coding assistants (Claude, GitHub Copilot, Cursor, etc.) as a core part of the daily workflow — scaffolding, writing tests, reviewing code, and debugging.

9

Mandatory (AI Fluency 2): Must be able to write precise, effective prompts for production-quality output, decompose tasks so AI assistance is effective, and critically evaluate AI-generated code for correctness, security, and standards before merging.

10

Mandatory (Company): Must come from a product company background (B2B SaaS or B2C both acceptable).

11

Mandatory (Note1): This is a 3-month contract role. Candidate must be comfortable with the contract engagement and able to join immediately (urgent — onboarding within ~a week)

12

Mandatory (Note 2): Must be based in or near Chennai, Bangalore, or Ahmedabad (Chennai: hybrid, Tue & Thu in office)

13

Preferred (Backend): Hands-on Python experience is a plus.

14

Preferred (Database): Hands-on database / JDBC integration experience in a production environment.