Quantitative Developer

• Build and extend the team’s research platform: data ingestion, back testing, scenario analysis, portfolio construction, monitoring, and reporting.

• Own the multi-asset data layer: market data, macro, fundamentals, fund and index data, internal holdings, with quality control the PMs actually trust.

• Use AI coding agents daily for prototyping, refactoring, testing, review, and documentation. Bring opinions on where they help and where they hurt.

• Build internal AI-backed tooling for the team where it earns its keep: research workflows, client-reporting drafts, commentary support, meeting prep.

• Write production code that other quants want to build on. Own reliability, testing, and observability for what you ship.

• Mentor teammates on effective AI-augmented engineering practice.

• Carry out other duties as assigned

• Have built industrial-scale enterprise-quality quantitative/systematic models based on specs provided by PM’s.

• Have deployed quantitative/systematic models to production at non trivial size. Have monitored operational performance of these models and taken ownership of making sure the models behave properly

• Are familiar with the SDLC (eg testing/deployment)

• Are heavy users of modern AI tools (claude code/codex/opencode/pi/ampcode/factory droid/cursor/cline)

• Have written extensive documentation about the implementation of a model.

Nice to have skills

• Working knowledge of financial markets preferred

• Knowledge of Excel preferred

• Github (or other version control), CI/CD and/or cloud services experience is beneficial

• Excellent interpersonal, relationship building and customer service skills

• Strong econometrics and statistics background, experience in asset pricing empirical work

• Passionate about financial markets with a curiosity about investing

The base salary range for this position is $110,000 - $125,000. This range is estimated for this role. Actual pay may be different. This position will be open through August 31, 2026.

A career at Janus Henderson is more than a job, it’s about investing in a brighter future together .

Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.

Our Values are key to driving our success, and are at the heart of everything we do:

If our mission, values, and purpose align with your own, we would love to hear from you!, Janus Henderson (including its subsidiaries) will not maintain existing or sponsor new industry registrations or licenses where not supported by an employee’s job functions (as determined by Janus Henderson at its sole discretion).

You should be willing to adhere to the provisions of our Investment Advisory Code of Ethics related to personal securities activities and other disclosure and certification requirements, including past political contributions and political activities. Applicants’ past political contributions or activity may impact applicants’ eligibility for this position.

You will be expected to understand the regulatory obligations of the firm, and abide by the regulated entity requirements and JHI policies applicable for your role.