Lead/Senior Java Developer

About the Role

We are building a next-generation, high-performance market-data platform for a large-

scale brokerage platform, capable of processing high-volume exchange market data

and distributing real-time prices to millions of users.

You will work on the core market-data distribution platform spanning exchange feed

processing, Aeron-based messaging, high-performance interest routing, WebSocket

fanout, real-time candle generation, replay/recovery and persistent tick recording.

Key Responsibilities

• Design and develop high-performance Java applications for real-time market-

data processing.

• Build an Aeron-based ultra-low-latency market-data distribution layer.

• Develop the Interest Router responsible for routing instrument ticks to interested

WebSocket nodes.

• Design lock-free/concurrent data structures for high-throughput subscription

management.

• Build high-performance WebSocket infrastructure using Netty.

• Implement dynamic subscription/unsubscription, heartbeats, reconnection and

recovery.

• Develop real-time 1-minute, 5-minute and 15-minute candle aggregation.

• Integrate Chronicle Queue or equivalent technologies for tick recording and

replay.

• Design sequence-number-based recovery and gap detection mechanisms.

• Optimize JVM performance, memory allocation, GC and thread scheduling.

• Investigate and resolve latency, throughput and backpressure issues.

• Design highly available and horizontally scalable market-data components.

• Work closely with infrastructure teams on Linux, networking, CPU affinity, NUMA

and high-performance NIC configuration.

• Build performance benchmarks and load tests for millions of subscriptions and

high tick rates.

• Develop observability using Prometheus/Grafana/OpenTelemetry.

Mandatory Skills

• 6+ years of strong Java development experience.

• Excellent understanding of Java concurrency and the Java Memory Model.

• Strong knowledge of volatile, CAS, Atomic classes, VarHandle, locks, lock-free

algorithms and concurrent data structures.

• Strong JVM knowledge including GC, JIT, memory allocation and profiling.

• Strong experience with high-throughput, low-latency applications.

• Strong Linux fundamentals.

• Good understanding of TCP, UDP, multicast, network buffers and backpressure.

• Experience with Netty or another high-performance networking framework.

• Strong distributed-systems and system-design skills.

• Experience designing systems that operate at high throughput with predictable

latency.

Preferred Skills

• Aeron / Aeron Archive

• Chronicle Queue

• LMAX Disruptor

• Agrona

• JCTools

• DPDK / AF_XDP / kernel-bypass networking

• FIX/FIXFAST or exchange market-data protocols

• NSE/BSE market-data experience

• Capital-markets / brokerage experience

• WebSocket infrastructure at large scale

• ClickHouse / Kafka

• Prometheus / Grafana

• Kubernetes / AWSRole & responsibilities

Preferred candidate profile