What we’re looking for

• 5+ years of experience building and shipping production-grade software in fast-paced and early-stage start up
• Proven, hands-on experience developing and deploying production-ready AI features
• Highly proficient with AI-first thinking and software development best practices
• Strong full-stack engineering skills with a backend-first orientation
• Deep experience designing, building, and operating scalable backend systems, ideally in Python
• Solid frontend experience with React or similar modern frameworks
• Experience working with data-heavy, analytics-driven, or workflow-oriented systems
• Strong technical judgment and the ability to balance speed, correctness, and long-term maintainability
• Clear, thoughtful communication skills for a remote, highly collaborative team
• A proactive, ownership-driven approach to ambiguous problems

This role is a great fit if

• You want to work on high-leverage systems that directly shape how institutional investors deploy capital
• You enjoy owning complex technical problems from problem definition through production impact
• You like working at the intersection of data, product, and business decision-making
• You’re comfortable influencing technical direction and raising the bar for engineering quality
• You thrive in environments with autonomy, responsibility, and evolving priorities with strong ownership

Not a great fit if

• You lack strong backend experience or are uncomfortable owning production systems in Python
• You prefer narrowly scoped tasks over end-to-end ownership
• You avoid frontend or product-facing work You struggle with ambiguity, changing requirements, or close cross-functional collaboration
• You prefer highly rigid processes and minimal iteration

Tools we use

• Languages: Python, TypeScript
• Backend: FastAPI, Django
• Frontend: React, Next.js
• Data: Airflow, dbt, Snowflake, PostgreSQL
• Infra: AWS, Terraform
• Tooling: GitHub

Mainstay Built on Trust

At Mainstay, trust is at the core of everything we do. We build trust with everyone -- from candidates to employees to partners. We believe in fairness and openness throughout our hiring process, evaluating candidates based on qualifications without regard to race, color, religion, national origin, age, gender, marital status, disability, veteran status, sexual orientation, gender identity, or any other protected status. Our privacy practices describe how we handle applicant information, you can find the policy details for California residents here.

We are committed to providing reasonable accommodations throughout our recruitment processes for candidates with disabilities, pregnancy, religious beliefs, or other reasons protected by applicable laws. If you require assistance or a reasonable accommodation, please contact us at [email protected]