Senior Java/Kotlin Engineer — Modernize Trading Systems

ApTask; Jersey City (NJ); Hybrid; USD 140,000 - 190,000; Full time

Job summary

ApTask is seeking a Senior Java/Kotlin Engineer to upgrade legacy trading systems to a cloud-native, event-driven architecture while ensuring high performance, data integrity, and stability in live environments.

The role requires hands-on Java and Kotlin development, experience with event-driven patterns, and strong TDD/CI/CD practices. The position operates in a hybrid model (3 days on-site) in a high-demand financial tech context.

Qualifications

• Bachelor's degree in Computer Science or related field.
• Strong Java expertise with Kotlin willingness to learn.
• Experience with event-driven messaging and distributed systems.
• Proficient in CI/CD and TDD practices.
• Ability to modernize legacy systems while maintaining production stability.

Responsibilities

• Develop and modernize enterprise trading systems using Java and Kotlin.
• Design event-driven applications using messaging and event-sourcing patterns.
• Implement TDD, automated testing, and CI/CD practices.
• Modernize legacy systems while ensuring zero-downtime releases.
• Collaborate with stakeholders and engineering teams to deliver scalable solutions.
• Leverage AI-assisted development tools for code analysis and testing.

Skills

Java

Kotlin

Event-driven

TDD

CI/CD

Production autonomy

Education

Bachelor's degree in Computer Science

Tools

Kafka

MongoDB

SQL Server

T-SQL

Kubernetes/OpenShift

OpenTelemetry

ELK

Grafana

Job description

ApTask is seeking a Senior Java/Kotlin Engineer to upgrade legacy trading systems to a cloud-native, event-driven architecture while ensuring high performance, data integrity, and stability in live environments.

The role requires hands-on Java and Kotlin development, experience with event-driven patterns, and strong TDD/CI/CD practices. The position operates in a hybrid model (3 days on-site) in a high-demand financial tech context.