Java Backend Developer

Java Backend Developer - NY, Hybrid (IN PERSON INTERVIEW) Client : Mastercard - NY

Rate : $65/hr C2C

Interview : Only In person - Either on Tue Wed and Thurs (11, 12 or 13 November 2026)c

Need to Carry own Laptop

Need Local Candidates - NY or relocation works - NJ

Native Candidate and Male Preffered

Experience required: 13+ years

USC & GC preferred

Client is seeking a highly experienced Senior Java Backend Developer with strong hands-on coding expertise. This is a core backend engineering role requiring deep experience in Java, Spring Boot, Microservices, and API development. The ideal candidate is a strong individual contributor who spends the majority of their time designing, developing, and optimizing enterprise applications.

Mandatory Requirements

• 13 to 15 years of hands-on Java backend development experience.
• Strong coding and problem-solving skills.
• Extensive experience with Java, Spring Boot, and Microservices architecture.
• Strong expertise in RESTful API design and development.
• Experience building scalable, high-performance enterprise applications.
• Strong understanding of object-oriented design principles and design patterns.
• Experience with multithreading, collections, concurrency, and performance optimization.
• Strong database experience with SQL and data modeling.
• Experience with cloud-native and distributed systems environments.
• Familiarity with CI/CD pipelines, Git, Maven/Gradle, and DevOps practices.

Technical Skills

Required:

• Java 8/11/17+
• Spring Boot
• Microservices Architecture
• REST APIs
• Kafka or Messaging Technologies
• SQL Databases (Oracle, PostgreSQL, SQL Server)
• Git
• Maven/Gradle
• Docker/Kubernetes
• JUnit and Unit Testing

Preferred:

• AWS, Azure, or GCP
• Redis/Caching Technologies
• ElasticSearch
• NoSQL Databases
• Payment or Financial Services Domain Experience

Interview Process

• In-person coding interview required.
• Candidate must bring their own laptop for live coding assessment.
• Interview availability preferred between 12:00 PM and 3:00 PM on Tuesday, Wednesday, or Thursday.

Key Responsibilities

• Design and develop backend services using Java and Spring Boot.
• Build and maintain scalable microservices and APIs.
• Write clean, efficient, production-quality code.
• Participate in architecture discussions and technical design reviews.
• Troubleshoot and resolve complex production issues.
• Optimize application performance, scalability, and reliability.
• Collaborate with architects, DevOps engineers, and product teams.

Candidate Profile

• Strong hands-on developer, not primarily a manager.
• Excellent coding and debugging abilities.
• Able to work independently in a fast-paced enterprise environment.
• Strong communication and collaboration skills.

Priority: Please submit only the top 2-3 strongest candidates who are highly hands-on with Java backend development and can confidently clear a live coding interview.