Senior Developer

HLS Trading; Greenwich (CT); Hybrid; USD 180,000 - 280,000; Full time

Job summary

HLS Trading is seeking a Senior Developer to own and extend the trading and research platform, working with Python and C++ components, data pipelines, and model interfaces. You will collaborate with the investment team to translate research needs into robust technical solutions.

The role emphasizes reliability, observability, and scalable architecture, with a path toward leading a development team as the firm grows. Hybrid work in Miami or Greenwich is offered.

Qualifications

• 5+ years of professional software development experience, including real-time trading systems or research platforms.
• Expert-level Python for large-scale data processing with NumPy, Pandas, Polars, PyTorch, or similar.
• Working proficiency in C++ for performance-sensitive components.
• Hands-on experience with very large datasets and time-series databases and columnar formats.
• Familiarity with monitoring and logging tools (Prometheus, Grafana, ELK, Datadog).
• Advanced, hands-on use of LLM coding tools and agents as a core part of builds.

Responsibilities

• Own real-time market data ingestion into models and position management.
• Extend connectors for live data feeds, broker connections, and vendor APIs.
• Maintain latency-sensitive C++ components.
• Build pipelines for tick-level and historical data with validation.
• Design data models, storage, and query APIs for large datasets.
• Develop Python tooling for backtesting and research reproducibility.
• Improve observability, monitoring, alerting, and logging across systems.
• Set testing and deployment standards, including replay testing.
• Provide technical leadership to guide future development teams.

Skills

Python

NumPy

Pandas

Polars

PyTorch

LLM tools

C++

Time-series DB

Parquet

DuckDB

ClickHouse

Prometheus

Grafana

ELK

Datadog

Docker

Kubernetes

Terraform

Pulumi

Tools

InfluxDB

TimescaleDB

kdb+/q

Parquet

DuckDB

ClickHouse

Prometheus

Grafana

ELK

Datadog

Docker

Kubernetes

Terraform

Pulumi

Job description

HLS Trading is a systematic macro fund with offices in Miami, FL and Greenwich, CT. We launched in 2026 and run a deliberately small team, so everyone works directly on the business. For a systematic manager, the trading platform is the business, and this role owns it.

About the Role

The Senior Developer owns the platform behind our trading and research. Core pieces are already in place, including a position management system that handles order generation, routing, and pre-trade risk controls, and colocated market data infrastructure in NY4, so the work is to extend, harden, and improve that platform rather than build it from scratch. The stack is primarily Python, with C++ for performance-sensitive components. Cloud infrastructure and CI/CD are handled by a dedicated team member, so while familiarity with those areas is useful, this role is squarely focused on the trading and research platform itself. There are no direct reports today, but we expect this role to lead a development team as the firm grows. This is a hybrid role based in either our Miami or Greenwich office, with three days a week in the office.

Responsibilities

Trading Infrastructure

• Own the real-time systems that carry live market data into our models and model target positions into the position management system.
• Extend and maintain the connectors that ingest live market data, including high-volume exchange feeds in NY4, broker connections, and vendor APIs (e.g., Bloomberg, LSEG).
• Maintain and improve C++ components on latency- and throughput-sensitive paths.

Market Data and Research Platform

• Build and optimize pipelines that process, clean, and validate tick-level and aggregated historical futures and FX data, along with the reference data they depend on, such as contract specifications, roll schedules, and trading calendars.
• Design data models, storage, and query APIs for large volumes of market data, prioritizing query performance, data integrity, and cost efficiency.
• Develop Python tooling and libraries that make research, model evaluation, and backtesting faster and more reproducible, with shared code and data paths so strategies behave the same in backtests as in live trading.
• Work directly with the investment team to turn complex, often loosely defined research needs into durable technical solutions.

Production and Reliability

• Improve the reliability, observability, and testability of research and production systems, including monitoring, alerting, and logging for every market data feed and trading system.
• Diagnose difficult problems across the research-to-production lifecycle and follow through on root-cause fixes.
• Set standards for testing, code review, and production readiness, including simulation and replay testing before changes reach live trading.

Technical Leadership

• Make pragmatic architecture and build-versus-buy decisions for the platform, and establish the engineering practices a future development team will build on.

Qualifications

Required

• Experience: 5+ years of professional software development experience, including direct work on real-time trading systems or research platforms.
• Programming: Expert-level Python, including large-scale data processing with NumPy, Pandas, Polars, PyTorch, or similar.
• C++: Working proficiency in C++ for performance-sensitive components.
• Data Systems: Hands-on experience with very large datasets, including time-series databases (e.g., InfluxDB, TimescaleDB, kdb+/q) and columnar formats and engines (e.g., Parquet, DuckDB, ClickHouse), or similar.
• Observability: Familiarity with monitoring and logging tools such as Prometheus, Grafana, ELK, or Datadog.
• LLM Fluency: Advanced, hands-on use of LLM coding tools and agents as a core part of how you build, with a clear sense of where they fail.

Strongly Preferred

• Understanding of futures and FX market data conventions and market microstructure.
• Experience with systematic trading or quantitative research workflows.
• Experience mentoring engineers or leading technical projects.
• Familiarity with cloud platforms (AWS, GCP, or Azure) and containerization (Docker, Kubernetes).
• Exposure to CI/CD pipelines and infrastructure-as-code tools (Terraform, Pulumi).

Equal Opportunity Statement

HLS Trading is an Equal Opportunity Employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, veteran status, disability, or any other characteristic protected by law.