Senior Software Engineer, Core

Responsibilities

• Design, develop, and maintain high-performance platform services including API gateways (FIX, WebSocket, REST), and the core libraries that product teams across Talos build on.
• Build and evolve Aeron-based messaging infrastructure for reliable, low-latency communication.
• Tackle hard distributed systems problems end-to-end: ordering and determinism guarantees, zero-downtime deployments, active-active architectures spanning cloud regions, and crash-consistent recovery.
• Work cross-functionally to ensure platform primitives meet the throughput and latency requirements of real-time trading workflows, including market data distribution at scale.
• Provide product teams with reusable service infrastructure to build scalable, reliable, and cost-efficient services.

Qualifications

• 7+ years of backend engineering experience with deep proficiency in Go, C++, Java, Rust or similar systems languages.
• Demonstrated ownership of large-scale distributed systems, from initial design through deployment, scaling, and long-term operations.
• Strong systems-level fundamentals: concurrency primitives, memory layout, I/O models, database design, network protocols, and the performance implications of each.
• Experience designing systems with stringent correctness guarantees — ordering, consistency, durability — not just ones that work under normal conditions.
• Track record of leading technical decisions: navigating ambiguity, defining architecture, making meaningful trade-offs, and bringing a team along on the reasoning.
• Comfortable operating at multiple levels of abstraction, from API contract design down to diagnosing latency spikes at the socket or disk layer.

Preferred Experience

• With Aeron or comparable low-latency messaging frameworks (e.g., Chronicle, LMAX Disruptor, ZeroMQ).
• Hands-on experience building geo-distributed or multi-site systems with active-active replication and regional failover.
• Familiarity with FIX protocol (4.x/5.x) or other structured financial messaging formats.
• Background in trading infrastructure, market data systems, or other latency-sensitive financial platforms.
• Experience with sequencer design, write-ahead logging, or custom persistence engines.