Senior Go Engineer — Low-Latency Trading Systems

2 days ago

Bengaluru, Karnataka, India SumCircle Technologies Private Limited Full time ₹ 3,00,00,000 - ₹ 6,00,00,000 per year

Senior Go Engineer — Low-Latency Trading Systems (HFT)

Location:
Bangalore (on site)

Team:
Core Trading Systems

Type:
Full-time

Mission

Build and evolve ultra-low-latency, fault-tolerant trading services powering a high-frequency crypto exchange. You'll design and ship Go services that execute, route, and risk-check orders at extreme throughput and tight latency budgets, while integrating with our market data, matching, and settlement stacks

What You'll Own

  • Low-latency services:
    Design and implement Go microservices for order ingest, risk checks, book building, pricing, and routing with sub-millisecond P99 budgets.
  • Performance engineering:
    Profile and optimize hot paths (CPU, memory, GC, syscalls), apply lock-minimizing/data oriented designs, tune goroutine/queueing strategies, and leverage NUMA/IRQ/network stack optimizations in collaboration with Platform.
  • Distributed systems:
    Build resilient pipelines for market data and events (Kafka) and stateful services on top of NoSQL and KV stores; design idempotent, exactly-once flows where required.
  • Reliability & correctness:
    Implement strong failure-domain isolation, backpressure, circuit breaking, replay/recovery, and well-defined consistency/ordering guarantees.
  • Infrastructure integration:
    Service discovery and dynamic config using HashiCorp Consul; zero-downtime deploys, feature flags, and canaries.
  • Observability:
    Ship with comprehensive metrics, tracing, and structured logs; create SLOs and on-call playbooks for rapid incident response.
  • Security & compliance:
    Follow least-privilege, secrets hygiene, and secure coding practices; participate in design reviews and threat modeling for critical paths

Minimum Qualifications

  • 5+ years
    of professional systems/backend experience, 3+ years in Go building high-throughput services.
  • Proven delivery in low-latency or HFT/market-data/matching/risk adjacent systems (or equivalent domains like ad serving, realtime bidding, gaming backends, telemetry ingestion).
  • Deep knowledge of concurrency (goroutines, channels, atomics, sync primitives), memory models, and data-oriented design.
  • Strong grasp of networking (TCP, UDP, multicast, kernel networking basics, connection pooling, Nagle/Delayed ACKs, TLS overhead trade-offs).
  • Practical experience with Kafka (producer/consumer tuning, partitions, compaction, idempotent/transactional producers, lag management).
  • Hands-on with at least one NoSQL/KV store (e.g., FoundationDB, DynamoDB, Scylla/Cassandra, Redis, Aerospike): schema/key design, consistency/latency trade-offs, and capacity planning.
  • Production use of HashiCorp Consul (service discovery, health checks, KV/config, session locks/leader election).
  • Proficiency in Linux performance tooling (pprof, perf, eBPF, flamegraphs) and benchmarking methodology.
  • Excellent testing discipline: deterministic unit tests, property/fuzz tests, fault injection, and load tests that simulate exchange conditions

Bonus Points

  • C/C++/Rust experience for hot-path components, FFI, custom allocators, or low-level networking.
  • Kernel/bare-metal tuning: IRQ steering, RSS, SR-IOV, busy-poll, hugepages, io_uring.
  • Time-sync and clock-domain experience (PTP, NTP, clock skew handling) for market-data alignment and fair sequencing.
  • Prior work on matching engines, order books, risk engines, FIX/ITCH OUCH protocols, or market-data handlers.
  • Experience with zero-copy techniques, memory arenas, lock-free/wait-free structures (ring buffers, MPSC queues).
  • Strong familiarity with idempotent outbox, sagas, exactly-once semantics where they truly matter—and knowing when they don't

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