UI Engineer (React/Python)

The Hollister Group; Boston (MA); On-site; USD 120,000 - 170,000; Full time

Job summary

The Hollister Group in Boston is seeking an experienced full‑stack engineer to own and evolve a flagship portfolio management and decomposition platform. You will build fast, scalable tools that drive real-time investment decisions and work across Python, TypeScript, and React to deliver robust, cloud-ready solutions.

You will design backend systems with Python, Ray, and Pandas/Polars, optimize performance, and collaborate with quants, PMs, and engineers to refine investment workflows.

Qualifications

• Bachelor's degree in a relevant field.
• 4-6 years of full-stack development experience with production systems.
• Strong front-end skills with TypeScript, HTML/CSS, React; component design, state management, performance for data-heavy views.
• Hands-on experience with Material UI (MUI) and MUI X for UI and visualizations.
• Strong backend skills with Python, Ray, FastAPI, and Pandas/Polars; API design and databases (relational and non-relational).
• Experience optimizing systems for performance, scalability, and cloud deployment.
• Ability to collaborate well in a team and adapt in a fast-paced environment.
• Some investment domain knowledge in portfolio decomposition or attribution is a plus.

Responsibilities

• Build, test, and enhance tools that attribute drivers of portfolio positions, returns, and risk to models.
• Develop full-stack applications using Python, TypeScript, and React for speed and maintainability.
• Design and implement backend systems with Python, Ray, and databases for high-performance data processing.
• Create cloud-ready, modular solutions that are easy to maintain as investment needs evolve.
• Work with data structures and APIs for fast access to portfolio insights.
• Align tools with investment workflows by collaborating with PMs, quants, and engineers.
• Contribute to research to improve the investment process informed by attribution systems.

Skills

Full-stack dev

TypeScript

React

Python

API design

Ray

FastAPI

Pandas/Polars

Databases

Cloud deployment

Teamwork

Investment domain

Education

Bachelor's degree in a relevant field

Tools

PostgreSQL

MongoDB

Redis

MUI

MUI X

Job description

***Please note this is a long term contract position and only candidates local to Boston will be considered with proof of residence.

Position Overview:

This is an opportunity to own and evolve one of the firm’s flagship internal software products, delivering a market-leading portfolio management and decomposition platform that provides a competitive edge in systematic investing. It is an execution-heavy role for an engineer who wants to build fast, scalable, and maintainable tools that drive real-time investment decision-making.

What You’ll Do:

• Build, test, and enhance tools that attribute drivers of portfolio positions, returns, and risk to alpha, risk, transaction, and liquidity models.
• Develop full-stack applications using Python, TypeScript, and React, ensuring speed, reliability, and maintainability.
• Design and implement backend systems using Python, Ray, and databases for scalable, high-performance data processing.
• Implement cloud-ready, modular, and extensible solutions that are easy to maintain and update as investment needs evolve.
• Work with data structures and APIs to ensure fast and efficient access to portfolio insights.
• Optimize and unify reporting across multiple geographies, strategies, and use cases, including exception-based management reports.
• Collaborate with portfolio managers, quants, and engineers to align tools with investment workflows.
• Participate in and facilitate research efforts to improve the investment process informed by feedback from the attribution systems you build.

We’re Looking for Teammates With:

• Bachelor's degree in a relevant field.
• 4-6 years of full-stack development experience including work on production systems.
• Strong front-end development skills using TypeScript, HTML/CSS, and React, including component design, state management, and performance optimization for data-heavy views.
• Hands‑on experience with Material UI (MUI) and MUI X for building user interfaces and data visualizations is a plus.
• Strong backend engineering skills using Python, Ray, FastAPI, and Pandas/Polars, including API design, distributed parallel computing, and experience with both relational and non-relational databases.
• Experience optimizing software systems for performance, scalability, and cloud deployment.
• Ability to work as an effective team player and self-starter, willing to roll up their sleeves to help accomplish team goals.
• Ability to work well in a fast-paced, rapidly changing environment.
• Some investment domain knowledge, particularly in portfolio decomposition, attribution, risk analysis, or quantitative equity strategies, is a plus.

Our Commitment to Inclusion & Belonging

The Hollister Group is an equal opportunity employer. We welcome and encourage applications from people who are under-represented in their respective occupations or positions.