Senior Software Engineer

Mithrl•San Francisco, CA

2d•Onsite

About The Position

We are hiring a Senior Full Stack Engineer to help build, scale, and evolve the core Mithrl product. This is a highly product-oriented engineering role with deep ownership across frontend, backend, and system design. You will work closely with product, design, ML, and scientific teams to turn complex scientific workflows into intuitive, high-performance software used daily by world-class researchers. As a senior engineer, you will be responsible not just for execution, but for technical direction, architectural decisions, and setting engineering standards. You will own features end-to-end, from initial concept through production, iteration, and scale. This role requires strong full-stack engineering fundamentals, a bias toward shipping, and the ability to operate comfortably in ambiguous, fast-moving environments. If you enjoy building real products used by sophisticated users, thinking deeply about system design and user experience, and taking ownership of critical parts of a fast-growing platform, this role is an ideal match.

Requirements

7+ years of professional software engineering experience
Strong full-stack engineering experience with Python and React in production environments
Proficiency in Django for building backend APIs, services, and data-intensive systems
Strong experience building modern frontend applications using React
Experience designing and working with GraphQL APIs, including schema design, performance considerations, and client-server data modeling
Experience designing and working with scalable systems, databases, and data-intensive applications
Strong understanding of system design, software architecture, and engineering best practices
Experience shipping and owning production systems used by real customers
Ability to work effectively in fast-paced, ambiguous environments
Strong problem solving skills and a product-oriented mindset
Excellent communication skills and ability to collaborate cross-functionally

Nice To Haves

Experience building products for technical or scientific users
Familiarity with data-heavy, analytics, or ML-enabled platforms
Experience with cloud infrastructure such as AWS, GCP, or Azure
Experience mentoring or leading other engineers
Exposure to biotech, life sciences, or R&D workflows

Responsibilities

Design, build, and maintain core Mithrl product features across frontend and backend
Own end-to-end feature development, from product requirements to production deployment and iteration
Build intuitive user interfaces that abstract complex scientific and data workflows
Develop scalable backend services, APIs, and data pipelines that power the Mithrl platform
Collaborate closely with product, design, ML, and scientific teams to translate user needs into technical solutions
Make architectural decisions that balance speed, scalability, reliability, and developer velocity
Improve system performance, reliability, and observability as usage and data volumes grow
Write clean, maintainable, and well-tested code that sets a high bar for quality
Mentor junior engineers and contribute to raising the overall engineering bar
Participate in technical planning, code reviews, and ongoing platform evolution