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# Senior Java Systems Engineer - Platform Exchange / Matching Engine - NYC - Fintech

- **Company:** Adaptive Financial Consulting
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $240,000.0 - $260,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, Systems Engineering, Automation of Tests, Profiling, Memory Management, Java Web Services, Datadog, Cloud Platform System, Concurrency, State Machines, Kubernetes, Low Latency, Event Sourcing
- **Published:** October 19, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=24552a130860f6d8

## About the Role

We're looking for a Senior Java / Systems Engineer with significant experience in Platform Exchange Systems to design, deliver, and optimize production-ready, high-performance, low-latency technology using Aeron., * A hands-on engineer who enjoys designing and optimising low-latency Java services and protocols across the full delivery lifecycle.

 * Someone with genuine experience building Matching Engines and Platform Exchange Systems.
 * Driven by evidence-based engineering, automated testing, benchmarking, and profiling rather than guesswork.
 * A clear, confident communicator who can work across domain boundaries in a collaborative Agile environment, rather than being siloed into a single technology stack.

YOU HAVE:

 * Strong server-side, low-latency Java expertise (concurrency, memory management, I/O, and performance profiling).
 * Solid exchange, risk, or matching-engine experience.
 * Hands-on experience building automated testing strategies, running performance benchmarks, and diagnosing production issues.
 * Excellent technical communication and collaborative problem-solving skills.
 * Experience with order entry and market data protocols (e.g. FIX, ITCH).
 * Familiarity with low-latency frameworks such as Aeron, Chronicle, or LBM.
 * An understanding of replicated state machines, event sourcing, or deterministic systems.
 * Exposure to cloud environments (AWS/GCP), containers, Kubernetes, or observability tooling.

## Description

* Design, build, and optimise low-latency Java services and protocols for an Exchange Accelerator product across the delivery lifecycle.
 * Define order, session, instrument, and account models alongside exchange integration boundaries.
 * Develop automated testing strategies and perform evidence-based performance benchmarking and profiling.
 * Collaborate directly with client teams, SREs, QA, and leadership to ensure exchange readiness and durable production fixes.
 * Engage with client engineering and business stakeholders, communicating technical trade-offs clearly.
 * Support the product in production across multiple client deployments.

(And after six months)

 * Independently own key technical workstreams from concept to production readiness.
 * Deliver maintainable, observable, and well-tested systems aligned with core architecture.
 * Establish trusted relationships with clients through clear communication and steady delivery.