Demo

Senior Staff Engineer- Java & Kotlin

ApTask
Jersey, NJ Full Time
POSTED ON 10/29/2026
AVAILABLE BEFORE 11/27/2026

We are seeking a Senior Java/Kotlin Engineer. The role involves upgrading legacy trading systems to event-driven, cloud-native architecture while ensuring high performance, data integrity, and stability in a live production environment.


Work Model: Hybrid (3 days/week on-site)

Tech Stack: Java & Kotlin (must-have)

Tech Stack: Java & Kotlin (must-have)


Key Responsibilities:

  • Develop and modernize enterprise trading and post-trade systems using Java and Kotlin.
  • Design event-driven applications using messaging and event-sourcing patterns.
  • Implement Test-Driven Development (TDD), automated testing, and CI/CD practices.
  • Modernize legacy systems while maintaining production stability and enabling zero-downtime releases.
  • Collaborate with business stakeholders and engineering teams to deliver scalable solutions.
  • Leverage AI-assisted development tools for code analysis, testing, and refactoring.

Required Qualifications:

  • Strong Java expertise, with Kotlin experience or willingness to learn.
  • Hands-on experience with event-driven architecture, messaging, and distributed systems.
  • Strong TDD practices and experience with CI/CD and iterative delivery.
  • Proven ability to modernize complex legacy systems and work independently in production environments.
  • Bachelor's degree in Computer Science or a related field.

Preferred Skills:

  • Experience in Prime Brokerage, Equity Swaps, or Cash Equities.
  • Strong SQL Server, T-SQL, Kafka, and MongoDB skills.
  • Familiarity with Kubernetes/OpenShift, cloud-native technologies, and monitoring tools such as OpenTelemetry, ELK, and Grafana.
  • Knowledge of corporate actions, regulatory reporting, and risk/valuation systems.
  • Experience using AI-assisted and agentic development tools.


Salary : $180,000 - $240,000

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