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Lead Java Engineer
Lead Java EngineerVDart Inc • Saint Louis, MO, United States
Lead Java Engineer

Lead Java Engineer

VDart Inc • Saint Louis, MO, United States
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Job Title : Lead Java Engineer

Location : St. Louis MO

Duration : / Term : 6+ months

Experience Desired : 12+ Years

Job Description :

We are seeking a highly accomplished Principal Java Engineer to lead the design and evolution of large-scale, mission-critical backend systems. This role is ideal for a hands-on technical leader who combines deep Java expertise with architectural vision, performance optimization skills, and a strong engineering craftsmanship mindset.

You will define technical direction, guide engineering standards, and build highly scalable, resilient systems operating at high throughput (TPS) in cloud-native environments.

Key Responsibilities :

  • Lead architecture and design of high-scale distributed systems using Java
  • Define and enforce engineering best practices, coding standards, and design principles
  • Design scalable microservices and event-driven architectures
  • Drive performance optimization, scalability improvements, and system reliability
  • Mentor senior engineers and influence cross-team technical decisions
  • Conduct architectural reviews and provide consultative guidance
  • Ensure high code quality through TDD, code reviews, static analysis, and automation
  • Collaborate with Product, DevOps, and Platform teams to align system design with business goals
  • Lead modernization initiatives (legacy to microservices, monolith decomposition, cloud migration)
  • Contribute to observability, resilience, and fault-tolerant system design

Technical Expertise Required :

Core Java & Backend

  • Deep expertise in Java 8 / 11 / 17
  • Strong knowledge of :
  • Lambda expressions & Stream API
  • Concurrency & multithreading
  • CompletableFuture & async programming
  • JVM performance tuning & memory management
  • Extensive experience with Spring Boot / Spring Cloud

    • Architecture & Distributed Systems

  • Microservices architecture
  • Event-driven systems (Kafka or equivalent)
  • REST API design (spec-first / OpenAPI preferred)
  • High-availability & fault-tolerant system design
  • Circuit breakers, rate limiting, caching strategies
  • Horizontal scaling and high TPS environments

    • Data & Persistence

  • Strong expertise with : Oracle / DB2 / PostgreSQL / MySQL, MongoDB or other NoSQL databases
  • Data modeling for high-scale systems
  • Performance tuning (query optimization, indexing strategies)

    • DevOps & Platform

  • CI / CD (Jenkins, GitHub Actions, or equivalent)
  • Docker & Kubernetes
  • Observability tools (Prometheus, Grafana, ELK, etc.)
  • Cloud platforms (AWS / Azure / GCP)

    • Code Quality & Engineering Excellence

  • TDD / BDD
  • Static analysis tools (SonarQube)
  • Strong understanding of design patterns & SOLID principles
  • Experience in conducting architectural reviews

    • Leadership Expectations

  • Act as a technical authority and strategic advisor
  • Influence engineering culture toward craftsmanship and excellence
  • Challenge assumptions using data and performance benchmarks
  • Mentor engineers across levels
  • Drive long-term architectural vision

    • Ideal Background

  • 12 18+ years of experience in backend engineering
  • Proven track record of designing high-scale, always-on systems
  • Experience in payments, telecom, fintech, healthcare, or other high-throughput domains preferred
  • Strong communicator capable of presenting to senior stakeholders

    • Key Skills :

    Java 8 / 11 / 17, Lambda, Stream API, JVM, Kafka

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