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Blockhouse Systems Inc. logo

Quantitative Developer Internship (Winter 2026)

Job Overview

Location

New York City

Job Type

Full-time

Category

Software Engineering

Date Posted

December 25, 2025

Full Job Description

đź“‹ Description

  • • Own the full lifecycle of ultra-low-latency trading components—from white-board sketches to production deployment—using modern C++17/20 in a UNIX environment. You will profile, benchmark, and shave microseconds off critical paths that directly affect P&L and shape the firm’s competitive edge.
  • • Design and extend our real-time market-data ingestion layer: parse exchange feeds (ITCH, OUCH, MDP, FIX/FAST), normalize messages, and fan them out through ZeroMQ/Kafka-style buses to downstream strategies with sub-millisecond latency budgets. Your code will be the first line of defense against stale or malformed ticks.
  • • Build deterministic, event-driven simulation engines that let researchers replay billions of ticks and test new alphas without touching live capital. You’ll craft replay tooling, synthetic order books, and Monte-Carlo stress tests that run 24Ă—7 on our GPU cluster.
  • • Implement execution algorithms that split large parent orders into child slices while reacting to micro-structure signals—queue position, imbalance, spread, volatility. You’ll measure slippage, adverse selection, and fill probability in real time and iterate on the fly.
  • • Instrument every service with fine-grained logging, metrics, and tracing so we can diagnose issues at 3 a.m. without waking the entire team. Expect to work with GDB, perf, flame graphs, Prometheus, Grafana, and custom eBPF probes.
  • • Automate deployment pipelines that push new builds to AWS EC2 bare-metal instances and Docker containers with zero-downtime blue-green swaps. You’ll script the glue in Python or Bash, guard everything with unit/integration tests, and own the rollback strategy.
  • • Collaborate shoulder-to-shoulder with PhD researchers to translate mathematical models into rock-solid C++ kernels. When a researcher says “factor X predicts 2 bps,” you make it run in 200 nanoseconds and prove it under live fire.
  • • Triage and fix production incidents—whether it’s a memory leak, a kernel NIC driver quirk, or an exchange protocol change—under the pressure of live markets. Post-mortems are blameless but fast; root-cause fixes are permanent.
  • • Contribute to our in-house libraries: lock-free queues, custom allocators, nanosecond clocks, SIMD intrinsics, and TCP bypass techniques. Your commits will be reviewed by engineers who previously built Tier-1 HFT stacks.
  • • Present weekly lightning talks on performance tricks, new C++ features, or war stories from the trading floor. Teaching is the fastest path to mastery, and interns often become go-to experts by the end of the program.
  • • Leave with a portfolio you can’t get in a classroom: order books you hardened, sim engines you accelerated, and strategies you helped launch with real capital. Your GitHub will sparkle with production-grade code that moved markets.

Skills & Technologies

Python
C++
AWS
Docker
Linux
Junior
Onsite
$0k-$0k
Degree Required

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Blockhouse Systems Inc. logo
Blockhouse Systems Inc.
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About Blockhouse Systems Inc.

Blockhouse Systems is a technology company that builds secure, privacy-preserving data platforms for defense, intelligence, and critical-infrastructure organizations. Its core offering, the Blockhouse Vault, combines confidential computing, zero-trust architecture, and sovereign-cloud deployment to let agencies share, analyze, and act on sensitive information without exposing source data or cryptographic keys. Founded in 2020 and headquartered in Washington, D.C., the firm serves U.S. and allied government customers under FedRAMP High and DoD IL5 accreditations, delivering real-time collaboration, AI-driven insights, and mission-grade resilience while maintaining strict compliance with ITAR, CJIS, and FIPS 140-3 standards.

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