---
title: 'Software Engineer - Applied AI at Hudson River Trading'
canonical: 'https://feeny.ai/job/software-engineer-applied-ai-hudson-river-trading-london-m65b6vq29bf5'
type: 'job'
last_seen: '2026-09-26'
---

# Software Engineer - Applied AI at Hudson River Trading

- **Company:** Hudson River Trading
- **Location:** London, United Kingdom / New York NY, United States / Singapore
- **Posted:** 2026-09-26
- **Last confirmed live:** 2026-09-26
- **Apply:** https://www.hudsonrivertrading.com/careers/job/?gh_jid=8234195

## Job description

At Hudson River Trading (HRT) the Applied AI team’s mission is to increase the speed and quality of work across the firm’s most consequential workflows. We build AI systems that help researchers and developers iterate faster, automate increasingly complex work, and enable autonomous exploration at a scale that would not otherwise be possible.

We apply frontier models and agentic systems to how quantitative research, software development, and other critical work at HRT gets done. We combine cutting-edge commercial and open-source models and tools with infrastructure, research, and systems of our own.

Our work spans the full stack required to make this successful: AI infrastructure, research engineering, post-training and reinforcement learning, agent evaluation, security and alignment, and deployment into real workflows.

## Responsibilities

- Building scalable infrastructure for training, evaluating, and operating language models and AI agents
- Developing research environments, evaluation systems, and experimentation platforms that allow us to measure and improve agent performance
- Improving model and agent capabilities through post-training, reinforcement learning, prompting, tool design, and workflow optimization
- Designing sandboxing, policy enforcement, monitoring, and other safeguards for increasingly capable autonomous systems
- Partnering with teams across HRT to identify work AI can newly perform, develop effective solutions, and turn successful experiments into durable systems
- Evaluating new models, techniques, and products, and making informed decisions about when to build, buy, or adapt them
- Sharing technical knowledge and establishing effective practices for building and working with AI across HRT

Profile

- You are an excellent engineer who can turn ambiguous problems into working systems
- You learn unfamiliar technical and business domains quickly and enjoy moving between them
- You care about advancing what AI systems can reliably accomplish
- You use rigorous measurement and experiment design to guide decisions
- You are comfortable operating across research and production engineering
- You communicate clearly and collaborate well with people from different technical backgrounds
- You are curious about the capabilities, limitations, and risks of increasingly autonomous systems

## Qualifications

- Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience required
- Strong Python proficiency required
- Excellent software design, debugging, and problem-solving skills required
- Experience building and operating substantial software systems required
- Demonstrated engagement with modern AI systems, tools, or research required
- Machine learning research or engineering, including post-training, fine-tuning, reinforcement learning, or alignment
- AI-agent architecture, evaluation, or tool-use environments
- Distributed systems, model serving, orchestration, or high-throughput research infrastructure
- Security sandboxing, policy enforcement, adversarial testing, or governance for AI systems
- Forward-deployed engineering: working closely with users to discover, build, and operationalize new capabilities
- Linux, systems performance, networking, C++, or TypeScript

The estimated base salary range for this position is 200,000 to 300,000 USD per year (or local equivalent). The base pay offered may vary depending on multiple individualized factors, including location, job-related knowledge, skills, and experience. This role will also be eligible for discretionary performance-based bonuses and a competitive benefits package. Culture

Hudson River Trading (HRT) brings a scientific approach to trading financial products. We have built one of the world's most sophisticated computing environments for research and development. Our researchers are at the forefront of innovation in the world of algorithmic trading.

At HRT we welcome a variety of expertise: mathematics and computer science, physics and engineering, media and tech. We’re a community of self-starters who are motivated by the excitement of being at the cutting edge of automation in every part of our organization—from trading, to business operations, to recruiting and beyond. We value openness and transparency, and celebrate great ideas from HRT veterans and new hires alike. At HRT we’re friends and colleagues – whether we are sharing a meal, playing the latest board game, or writing elegant code. We embrace a culture of togetherness that extends far beyond the walls of our office.

Feel like you belong at HRT? Our goal is to find the best people and bring them together to do great work in a place where everyone is valued. HRT is proud of our diverse staff; we have offices all over the globe and benefit from our varied and unique perspectives. HRT is an equal opportunity employer; so whoever you are we’d love to get to know you.

Please be advised: Use of AI tools during interviews or assessments is strictly prohibited, unless otherwise instructed or agreed upon. We employ various methods to evaluate the authenticity of candidate responses. If we determine that AI assistance was used during any stage of the hiring process, we reserve the right to immediately disqualify your candidacy or rescind any job offers extended.

## About Hudson River Trading

## Company Overview
- **One-liner**: Hudson River Trading (HRT) is a multi-asset class quantitative trading firm that builds automated trading algorithms to provide liquidity on global markets.
- **Entity Type**: Private (no public ticker; no external funding rounds disclosed)
- **Headquarters**: New York City, New York, USA
- **Founded**: 2002
- **Founders**: Not publicly disclosed (current owner is Jason Carroll)

## Core Business
- **Primary industry**: Financial services – algorithmic trading and market making.
- **Target customers**: Institutional market participants, exchanges, and liquidity consumers (B2B). The firm trades on over 200 markets worldwide.
- **Mission/purpose**: “We are thoughtful market leaders, committed to the health and longevity of global markets.” [hudsonrivertrading.com](https://www.hudsonrivertrading.com/)

## Products & Services
- **Automated Trading Algorithms**: Proprietary models developed by mathematicians, physicists, and software engineers to execute trades across equities, futures, options, and other asset classes. Emphasis on statistical analysis and high-performance infrastructure.
- **Market Making**: HRT provides two-sided liquidity on electronic exchanges, holding about 25% of capital overnight with an average holding time of roughly five minutes (distinct from stereotypical high-frequency trading firms). [wikipedia.org](https://en.wikipedia.org/wiki/Hudson_River_Trading)

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Key Metric**: In Q1 2021, HRT generated approximately **$1.2 billion** from trading, amid heightened market volatility (Bloomberg report). [wikipedia.org](https://en.wikipedia.org/wiki/Hudson_River_Trading)
- **Notable Investors/Partners**: No external investors (private, founder-owned). Member of the Principal Traders Group (Futures Industry Association). Acquired competitor Sun Trading in 2018.
- **Growth Signals**: Employs over 800 people across offices in New York, Chicago, Austin, Boulder, London, Singapore, Shanghai, Mumbai, and Dublin. Continues to hire aggressively for roles in software engineering, algorithmic development, and research (130+ open roles as of mid-2026 per career page). [hudsonrivertrading.com/careers](https://www.hudsonrivertrading.com/careers/)

## Competitive Advantages
- **Advanced technology stack**: HRT’s distributed system is on the Pareto frontier of latency and throughput, giving researchers and engineers a unique platform for fast experimentation.
- **Collaborative culture**: Unlike many prop trading firms, HRT emphasizes shared R&D and cross-team cooperation (“the best ideas are born in a shared research and development environment”).
- **Ethical stance**: Internal code of ethics that exceeds regulatory requirements; transparent market participation (<1% of trading in dark pools).
- **Diversified strategies**: Multi-asset, multi-timeframe trading reduces single-point risk and enables resilience.

## Strategic Focus
- **Talent acquisition**: Actively recruiting from top math, computer science, and physics programs, as well as experienced engineers from big tech (Wall Street Journal noted HRT’s efforts to attract talent from Silicon Valley).
- **Global expansion**: Continued office openings in Asia and Europe to access more markets and liquidity pools.
- **Infrastructure investment**: Ongoing development of low-latency, high-throughput systems to maintain a competitive edge in algorithmic trading.

## Why Work Here
- **Culture**: HRT describes itself as “a small tech company with a big impact” – a community of curious, collaborative problem-solvers. Core values include automation & efficiency, make it better, togetherness, and inclusivity. [hudsonrivertrading.com/life-at-hrt](https://www.hudsonrivertrading.com/life-at-hrt/)
- **Hybrid/remote policy**: Majority of teams adopt an even split between in-office and remote work; some roles require full-time presence. Relocation assistance is available.
- **Perks & benefits**: Company-paid medical/dental (no premiums), 401k/pension matching, generous parental leave (via Progyny), caregiver support (Vivvi), fitness centers/reimbursement, daily catered meals, coffee bar, and regular social events (company trips, happy hours, volleyball tournaments).
- **Engineering environment**: Strong emphasis on C++, Python, OS internals, CPU architecture, and networking. Engineers work on everything from high-frequency trading engines to research infrastructure.

## Sources
1. [hudsonrivertrading.com](https://www.hudsonrivertrading.com/) – Company overview, mission, and philosophy.
2. [hudsonrivertrading.com/careers](https://www.hudsonrivertrading.com/careers/) – Job types, locations, and role descriptions (Algo Developer, Software Engineer, Algo Software Engineer).
3. [hudsonrivertrading.com/life-at-hrt](https://www.hudsonrivertrading.com/life-at-hrt/) – Benefits, culture, diversity & inclusion, work environment.
4. [wikipedia.org](https://en.wikipedia.org/wiki/Hudson_River_Trading) – History, business model, trading statistics (5% of US trading in 2014, Q1 2021 revenue, acquisition of Sun Trading).

## Other roles at Hudson River Trading

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- [Data Scientist Intern - 2027](https://feeny.ai/job/data-scientist-intern-2027-hudson-river-trading-new-york-ny-a78ap56zc2k3) — New York NY, United States
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- [Software Engineer - Low Level (C++)](https://feeny.ai/job/software-engineer-low-level-c-hudson-river-trading-singapore-8gf6g9651d9w) — Singapore
- [PhD Winter Internship - 2027](https://feeny.ai/job/phd-winter-internship-2027-hudson-river-trading-new-york-ny-x5krxfzzwmdj) — New York NY, United States
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- [Women in Trading and Technology Internship (WiTTI) – Winter 2027](https://feeny.ai/job/women-in-trading-and-technology-internship-witti-winter-2027-hudson-river-v67btm4wqk50) — New York NY, United States