Shenzyn Recruitment 2026: Java Developer (Mock Services) Hiring

🏢 Company Name: Shenzyn (Hiring for a Product-based Client)

✨ Job Role: Java Developer (Mock Services)

🗓️ Experience Required: 3 – 6 Years

📍 Job Location: Bangalore

💼 Employment Type: Full-Time

⏳ Joining: Immediate to 30 Days Preferred

🔍 Job Description – Java Developer (Mock Services)

Shenzyn is looking for a skilled Java Developer to join a mission-critical product team in Bangalore. This role is unique: you won't just be building standard APIs; you will be architecting Mock and Simulation Services. In the world of regulatory reporting and high-frequency financial systems, testing against real production environments is often impossible or risky. Your role is to build high-performance "digital twins" of these services to ensure system reliability.

You will work on Regulatory Reporting Solutions, ensuring that global financial institutions comply with evolving mandates. This requires a developer who understands deep system internals, can handle high-concurrency scenarios, and has a passion for writing clean, testable code in a Product-based environment.

🛠️ Must-Have Skills & Expertise

✅ Core Java & Frameworks (High CPC Keywords)

Java 8+ Mastery: Deep knowledge of Streams, Optional, and Lambda expressions.

Spring / Spring Boot: Building scalable microservices and managing dependency injection.

REST APIs: Designing contract-first APIs and handling complex JSON/XML transformations.

✅ Advanced Backend Logic

Multithreading & Concurrency: Handling parallel processing for high-volume financial data simulation.

Design Patterns: Proficiency in Singleton, Factory, Strategy, and Builder patterns for modular code.

RDBMS Expertise: Writing optimized queries for PostgreSQL, Oracle, or SQL Server.

✅ Testing & Simulation Tools

JUnit & Mockito: Crafting exhaustive unit tests (TDD/BDD approach).

Mock Services: Experience with WireMock, MockServer, or building custom simulation engines.

Messaging Queues: Exposure to Kafka or RabbitMQ for asynchronous event-driven simulations.

✅ DevOps & Build Tools

CI/CD Basics: Familiarity with Jenkins pipelines and Docker containerization.

Build Tools: Mastery of Git and Maven.

🎯 Cracking the Shenzyn Java Interview (3–6 Years)

This section increases user dwell time, significantly boosting your RPM.

1. The Multithreading Round

Question: "How would you simulate a race condition in a mock service to test a downstream system's resilience?"

Focus: Discuss CountDownLatch, CyclicBarrier, or custom thread sleeps to create deterministic delays.

2. Design Patterns for Mocks

Question: "Which design pattern would you use to return different mock responses based on a header value?"

Answer: Explain the Strategy Pattern or Chain of Responsibility to keep the mock logic decoupled.

3. Database & SQL

Question: "Explain how you would optimize a PostgreSQL query that is currently timing out while fetching 1 million simulated records."

Focus: Discuss Indexing, Partitioning, and Explain Plan analysis.

📩 How to Apply

If you are a Java enthusiast who loves building robust simulation systems, apply now:

Email Your Resume: Send your profile to hamsalekha.g@shenzyn.com

Subject Line: Java Developer (Mock Services) | [Years of Exp] | [Current Company] | Bangalore

❓ Frequently Asked Questions (FAQ)

Is this role hybrid or office-based? While the JD specifies Bangalore, most product companies in this space currently follow a 3-day office (Hybrid) model.

What is "Mock Services" development? It involves building software that simulates the behavior of real components (like a Bank's Core API) so other teams can develop and test their systems without needing the actual live environment.

Is experience in Kafka mandatory? The JD mentions "exposure," so a strong understanding of the concepts is usually enough to clear the initial rounds.

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