10078

3Core Systems, Inc; Quincy (MA); On-site; USD 120,000 - 160,000; Full time

Job summary

Zohorecruit is seeking a senior backend/server-side engineer in Quincy, MA for a 12-month contract. You will work in a hybrid model with four days onsite, focusing on core Java, multithreading, and Kafka-driven architectures.

The ideal candidate has 7+ years in Java, Spring Boot 3, and experience with relational databases; familiarity with capital markets post-trade domain is a plus.

Qualifications

• 7+ years of Java development experience.
• Strong knowledge of Spring Boot 3.
• Hands-on experience with Kafka or other event-streaming platforms.
• Experience with relational databases (Oracle, SQL Server, MySQL, PostgreSQL).
• Familiarity with capital markets post-trade systems is a plus.

Responsibilities

• Hands-on system design and enterprise application development.
• Testing and operational support for enterprise applications.
• Deploying and managing scalable applications on Kubernetes.
• Collaborating in a hybrid on-site work environment in Quincy, MA.

Skills

Core Java

Multithreading

Concurrency

Algorithms

Data structures

Spring Boot

Kafka

System design

Relational databases

DevOps tools

Tools

Git/Bitbucket

Jira

Maven

Kubernetes

Job description

Quincy, United States | Posted on 07/31/2026

Location: Quincy,MA (Hybrid - onsite for 4 days a week)

Duration: 12months contract

InterviewProcess: 2 rounds, 1 st round will 45-60 mins virtual followed byfinal round in-person interview for an hour.

Client is lookingfor a senior backend/server-side engineer who is extremely strong in Core Javafundamentals, particularly multithreading, concurrency, algorithms, and datastructures.

Looking forsomeone who is strong in Core Java concepts like multithreading, Datastructure, Algorithms, concurrency, team is using Java 17 but manager is openfor someone with strong Java 8 as well, this is for their post-tradeapplication team so if you find someone with Trading application or Capitalmarket background will be huge.

Kafka

Very important:

"Mostof our integrations are Kafka-driven."

Kafka is effectively their primaryevent streaming platform.

Candidatesshould have hands-on experience with:

• Event-driven architecture

Responsibilities:

• Hands-on experience in system design,application development, testing, and operational support of enterpriseapplications.
• 7+ years of experience in Java (Java 8 orhigher) with strong expertise in Spring Boot 3.
• 3+ years of experience with Kafka or otherevent-streaming platforms such as RabbitMQ, Client Kinesis, or Azure ServiceBus.
• 5+ years of experience working withrelational databases such as Oracle, SQL Server, MySQL, or PostgreSQL.
• Experience with distributed caching andin-memory data grid technologies, such as Hazelcast.
• Proficiency with software development andDevOps toolsets including Git/BitBucket, Jira, and Maven.
• Experience designing, deploying, and managingscalable applications on Kubernetes.
• Knowledge of capital markets, with a strongunderstanding of back-office technology platforms and systems.