Hybrid Senior Java Engineer — Low-Latency Exchange

Adaptive Financial Consulting, LLC.; Greater London; Hybrid; GBP 120,000 - 170,000; Full time

Benefits offered by this job

25 days holiday

Family medical and dental

Pension plan

Season ticket loan

Gym subsidy

Life insurance

Long-term disability insurance

Employee Assistance Plan

Hybrid working model

Job summary

Adaptive Financial Consulting, LLC is seeking a Senior Java / Systems Engineer with deep experience in Platform Exchange Systems to design and optimise production-ready, low-latency Java services using Aeron. You will work across the full delivery lifecycle, building matching engines and exchange integrations for a high-performance product.

You will collaborate with client teams, SREs, QA, and leadership, define models for orders and accounts, develop automated tests, run performance benchmarks,

Qualifications

• Hands-on engineer for low-latency Java services across the full delivery lifecycle.
• Experience building Platform Exchange Systems including Matching Engines.
• Experience with automated testing, benchmarking, and diagnosing production issues.
• Excellent technical communication and collaborative problem-solving skills.
• Experience with order entry and market data protocols (FIX/ITCH).
• Familiarity with Aeron, Chronicle, or LBM.
• Understanding of replicated state machines, event sourcing, or deterministic systems.
• Exposure to cloud environments (AWS/GCP), containers, Kubernetes, or observability tooling.

Responsibilities

• 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.
• 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.

Skills

Java

Low-latency

Concurrency

Performance profiling

Automated testing

Communication

Agile

Tools

Aeron

Chronicle

LBM

AWS

Kubernetes

FIX

ITCH

Job description

Adaptive Financial Consulting, LLC is seeking a Senior Java / Systems Engineer with deep experience in Platform Exchange Systems to design and optimise production-ready, low-latency Java services using Aeron. You will work across the full delivery lifecycle, building matching engines and exchange integrations for a high-performance product.

You will collaborate with client teams, SREs, QA, and leadership, define models for orders and accounts, develop automated tests, run performance benchmarks,