Sr Java Back End Engineer

Direct message the job poster from Glocomms

Location:

Hybrid (Chicago, New York, Boston, Dallas)

Contract Type:
Freelance mission with clear path to Contract-to-Hire

Team:
Approximately 10 engineers, Scrum methodology

We are rebuilding a mission-critical trading and risk platform from the ground up. You will design, implement, and optimize backend services that power real‑time trading and reporting. This role focuses on microservices architecture, secure API design, and high‑performance systems.

• Architect and deliver microservices by decomposing a legacy monolith into Spring Boot services using Hexagonal Architecture principles.
• Implement JWT‑based authentication and authorization for public REST APIs to ensure a secure gateway.
• Modernize reporting by migrating a legacy reporting module into scalable reporting microservices with guaranteed SLAs and clean data pipelines.
• Build new backend services for an exchange‑grade trading platform, integrating FIX protocol and ensuring deterministic behavior under load.
• Drive TDD‑first development, enforce clean code practices, and mentor peers on testing strategies.
• Profile and tune services for low latency, high throughput, and efficient concurrency.

• Core:
  Java SE/EE, Spring Boot, JMS, JDBC
• Build and CI/CD:
  Maven or Gradle, Jenkins, Git
• Data Layer:
  Oracle DB with Mongo
  
  DB or Postgres for certain services
• Messaging and Protocols: FIX, Kafka (nice to have)
• Containerization and Orchestration:
  Docker, Kubernetes
• Tools:
  Intelli
  
  J IDEA, Jira

• Senior‑level Java expertise with proven delivery in finance or trading systems.
• Hands‑on experience migrating monoliths to microservices including domain slicing, interface contracts, and observability.
• Strong grasp of security fundamentals such as JWT, token lifecycle, and API hardening.
• Deep knowledge of multithreading and concurrency, performance tuning, and memory optimization.
• Comfortable with CI/CD pipelines, containerization, and orchestration in production environments.
• Familiarity with FIX protocol, market data flows, or risk computation is a plus.

• Experience with Hexagonal Architecture and event‑driven patterns.
• Oracle DB optimization including partitioning and query tuning.
• Exposure to Python or Bash for tooling or data preparation.
• Observability stack such as Open Telemetry, Prometheus, or Grafana.

• Start as a freelance contractor (Corp‑to‑Corp or W2 via partner).
• Clear milestones tied to conversion with a contract‑to‑hire path once modernization streams hit agreed outcomes.

Mid‑Senior level

Contract

Consulting

Capital Markets

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