Senior Java Fullstack Developer with QA and Spring Batch

Job Description

Job Role: Senior Java Fullstack Developer with QA and Spring Batch

Job Location: McLean, VA(Day 1 Onsite & Final round will be an In Person Interview)

Job Type: Full Time

Salary Range: $110000 to $140000/Annum + Full Time Benefits

Job Summary

• We are looking for senior Java FS developer who has strong hands-on experience in QA automation and Spring Batch.

Key Responsibilities

• Technically strong in Java FS with Spring batch
• Design, build, and own high-throughput Java/Spring Boot microservices
• Lead Spring Batch job development for end-to-end pipelines
• Develop secure REST integrations with external/internal systems, including OAuth2 client-credentials token flow, API retries, timeout strategies, and observability-friendly logging
• Build file/API-to-database synchronization processes
• Drive production readiness
• Collaborate with cross-functional teams (QA, DevOps, Product, Data
• Mentor engineers through code reviews, architecture guidance, and engineering standards

Roles & Responsibilities

• Design, build, and own high-throughput Java/Spring Boot microservices for inbound data processing and enterprise integration workflows.
• Lead Spring Batch job development for end-to-end pipelines (ingestion, validation, transformation, persistence, reconciliation, and status tracking.
• Implement and optimize batch orchestration with restartability, idempotency, chunk processing, and robust error-handling patterns for production resilience.
• Develop secure REST integrations with external/internal systems, including OAuth2 client-credentials token flow, API retries, timeout strategies, and observability-friendly logging.
• Model and maintain relational data workflows in PostgreSQL, including schema-aware CRUD logic, transactional consistency, and query tuning for large-volume loads.
• Build file/API-to-database synchronization processes and ensure data lineage across staging, audit, and target tables.
• Define and enforce quality gates through BDD/integration automation (Cucumber + JUnit), including DB assertions, API response validation, and edge-case coverage.
• Drive production readiness: health checks, exception taxonomy, failure diagnostics, alerting hooks, and runbook-quality operational behavior.
• Collaborate with cross-functional teams (QA, DevOps, Product, Data) to deliver reliable releases via Maven, Docker, and CI/CD pipelines.
• Mentor engineers through code reviews, architecture guidance, and engineering standards for maintainability, testability, and performance.

Must-have skills

• 8+ years of hands-on Java development with strong OOP, collections/concurrency basics, and clean code principles.
• Deep expertise in Spring Boot and Spring Batch, including job/step configuration, readers/processors/writers, chunking, partitioning, and recovery strategies.
• Strong experience building and consuming RESTful APIs with Spring (Web/WebFlux), including resilient integrations and secure service-to-service communication.
• Proven SQL and PostgreSQL proficiency: complex queries, indexing fundamentals, transaction handling, and performance tuning for ETL-style workloads.
• Experience with Spring Data JPA and JDBC Template for both ORM and query-driven data access patterns.

Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.