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3Core Systems, Inc

Software Developer - Advanced

Quincy, MA, United States

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Job details

Posting language: English
Posted: Jul 31, 2026

Original job description

Job Title: Software Developer - Advanced

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

Duration: 12 months contract

Interview Process: 2 rounds, 1st round will 45-60 mins virtual followed by final round in-person interview for an hour.

Client is looking for a senior backend/server-side engineer who is extremely strong in Core Java fundamentals, particularly multithreading, concurrency, algorithms, and data structures.

Looking for someone who is strong in Core Java concepts like multithreading, Data structure, Algorithms, concurrency, team is using Java 17 but manager is open for someone with strong Java 8 as well, this is for their post-trade application team so if you find someone with Trading application or Capital market background will be huge.

Kafka

Very important:

"Most of our integrations are Kafka-driven."

Kafka is effectively their primary event streaming platform.

Candidates

should have hands-on experience with:

· Producers

· Consumers

· Topics

· Event-driven architecture

Responsibilities:

· Hands-on experience in system design, application development, testing, and operational support of enterprise applications.

· 7+ years of experience in Java (Java 8 or higher) with strong expertise in Spring Boot 3.

· 3+ years of experience with Kafka or other event-streaming platforms such as RabbitMQ, Client Kinesis, or Azure Service Bus.

· 5+ years of experience working with relational databases such as Oracle, SQL Server, MySQL, or PostgreSQL.

· Experience with distributed caching and in-memory data grid technologies, such as Hazelcast.

· Proficiency with software development and DevOps toolsets including Git/BitBucket, Jira, and Maven.

· Experience designing, deploying, and managing scalable applications on Kubernetes.

· Knowledge of capital markets, with a strong understanding of back-office technology platforms and systems.

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More about this job

Skills

Oracle Java
Apache Kafka
Spring Boot
RabbitMQ
Microsoft Azure
Oracle
Microsoft SQL Server
MySQL
PostgreSQL
Software development
Git
Atlassian Bitbucket
Jira
Apache Maven
Kubernetes

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