Software Engineer III

Software Engineer III Reporting to the Director in the Quantitative Investment Platform (QIP) team within Research, the Software Engineer will help design, build, and maintain the Python applications, services, and tooling that power the Firm's investment platform. As a senior engineer, this person will write production code — APIs, domain logic, automation, and supporting libraries — with a strong emphasis on clean, well-tested, maintainable software. This is a strong fit for someone with real depth in software engineering that wants to develop critical infrastructure, model, and data handling code in a quantitative investment firm.

Key Job Responsibilities

Design, build, and maintain Python applications and services that support the firm's research and investment process

Write clean, well-tested, maintainable code following team standards: type hints throughout, small focused functions, and clear naming

Build and consume internal APIs (e.g., FastAPI) and well-modeled domain libraries (e.g., Pydantic), with attention to clear interfaces and separation of concerns

Participate actively in code review, both giving and receiving feedback, as a core part of how the team ships software

Contribute to the team's automated test suites and help keep them fast, reliable, and meaningful

Help maintain and improve CI/CD pipelines (GitHub Actions) so that changes ship safely and frequently

Integrate the software you build with the firm's data platform (Snowflake) and orchestration (Prefect) where the work calls for it

Write and keep current the technical documentation and runbooks for the components you own

Collaborate with quantitative researchers and fellow engineers to turn requirements into reliable, well-designed software

Participate in agile team practices including sprint planning, backlog grooming, and estimation

Continuously sharpen your engineering practice and take on increasing scope and ownership as you grow

Build and extend AI-assisted tooling for the research and engineering workflow, including MCP servers and agent integrations (e.g., Claude, Anthropic API) that expose internal data and services to LLM-based assistant/agent.

Skills and Knowledge Required

Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics, Statistics, or equivalent professional experience

At least 5 years of hands-on professional experience writing production software

Solid proficiency in Python, including a working understanding of idiomatic, well-structured code

Familiarity with writing automated tests and an understanding of why testing matters.

Familiarity with version control in Git, including branching and the pull-request / code-review workflow

Understanding of core software engineering fundamentals: data structures, clean code, modular design, and debugging

Working proficiency in SQL

Demonstrated ability to learn new technologies quickly and a genuine eagerness to do so

Clear written and verbal communication, and the ability to work effectively on a collaborative team

Experience or strong interest in building with LLMs: MCP server development, agentic workflows, and frameworks such as LangChain/LangGraph and LangSmith for tracing and evaluation

Skills and Knowledge Desired

Exposure to test-driven development and an interest in software craftsmanship (e.g., Clean Code, refactoring, working effectively with legacy code)

Experience building web APIs, ideally with FastAPI or a similar framework

Experience with data modeling and validation libraries such as Pydantic

Exposure to CI/CD pipelines (e.g., GitHub Actions) and modern deployment practices

Familiarity with Azure or another major cloud provider, and with containerization (Docker)

Exposure to a cloud data warehouse (ideally Snowflake) and workflow orchestration (Prefect, Dagster, Airflow)

Interest in financial markets, quantitative investing, or financial/market data

This is a hybrid position based in Los Angeles, CA which requires weekly attendance.

No recruiters, please.

Los Angeles Capital is an SEC registered investment adviser and required to track certain political contributions under rule 206(4)-5. Therefore, you will be required to disclose your prior political contributions.

Los Angeles Capital is an Affirmative Action/Equal Opportunity Employer committed to providing employment opportunity without regard to an individual's race, color, religion, age, gender, gender identity, sexual orientation, national origin, ancestry, marital status, medical condition, genetic information, veteran status or disability.