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# Core Java Engineer, Trading Systems

- **Company:** Business Integration Partners USA Inc.
- **Location:** United States
- **Experience:** Expert
- **Salary:** $140,000.0 - $180,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Algorithmic Trading, Data Analysis, Concurrent Computing, Directed Acyclic Graph (Directed Graphs), Software Design Patterns, DevOps, Human-Computer Interaction, Software Architecture, Reverse Engineering, Software Engineering, Data Streaming, Multithreading, Event Driven Architecture, Legacy Systems
- **Published:** October 8, 2026
- **Apply:** https://www.thejobnetwork.com/job/fcaca118-cc28-4a24-bdbd-ed40f66c6851/senior-core-java-engineer-trading-systems

## About the Role

The ideal candidate combines deep Core Java engineering, strong architecture skills, and familiarity with fixed income pricing, quantitative workflows, or enterprise trading systems., * 7+ years of professional Java software engineering experience, with strong Core Java expertise.
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 * Proven experience building, enhancing, or supporting complex enterprise trading, pricing, risk, or financial technology platforms.
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 * Strong understanding of software architecture, design patterns, maintainability, and large-scale system modernization.
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 * Experience reverse engineering legacy systems with limited documentation and safely implementing changes in production environments.
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 * Hands-on experience with event-driven systems, concurrent programming, multithreading, and thread-safety considerations.
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 * Ability to work with complex data flows where outputs from one calculation become inputs into downstream calculations.
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 * Experience integrating applications with enterprise services, APIs, market data, analytics libraries, or calculation engines.
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 * Strong problem-solving skills and ability to operate independently in a technically complex environment.
\n, * Experience with fixed income, rates, bonds, pricing engines, curve construction, or eTrading platforms.
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 * Familiarity with graph-based or DAG-based pricing frameworks, calculator orchestration, or dependency-driven computation models.
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 * Exposure to in-house or vendor-supplied analytics libraries used within capital markets technology.
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 * Experience modernizing monolithic applications or migrating functionality from legacy platforms to strategic architectures.
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 * DevOps experience across build, deployment, monitoring, observability, and production support tooling.
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 * Experience working directly with traders, quants, or front-office technology stakeholders.

## Description

Engineers will work on complex pricing workflows involving graph-based calculator frameworks, event-driven processing, multithreaded execution, and bidirectional integration between legacy and strategic pricing components., This position requires a hands-on engineer who can reverse engineer sparsely documented systems, make safe tactical changes to business-critical platforms, and help preserve a seamless trader experience throughout the migration., * Reverse engineer and enhance a mature Core Java pricing platform supporting rates eTrading workflows.
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 * Decompose legacy pricing functionality into components that can be migrated incrementally to a strategic platform.
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 * Modify existing pricing engines so selected inputs can be routed to downstream calculators and returned to trader-facing workflows.
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 * Develop and support integrations between legacy pricing components, external pricing services, market data, and user interface layers.
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 * Work within graph-based calculator frameworks involving Directed Acyclic Graphs (DAGs), calculation cycles, and dependent pricing outputs.
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 * Ensure thread safety, resiliency, and performance across event-driven, heavily multithreaded pricing applications.
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 * Support pricing calculations, curve generation, input/output management, and high-volume processing across large instrument sets.
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 * Partner with trading technology, quantitative, and platform teams to translate pricing requirements into engineered solutions.
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 * Contribute to modernization planning, technical documentation, knowledge transfer, and production stability throughout the migration lifecycle.
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