Senior Software Engineer

Ark; Cambridge (MA); On-site; USD 120,000 - 150,000; Full time

Job summary

A cutting-edge bioprocess simulation software company in Cambridge is seeking a Senior Software Engineer to join their team. In this full-time role, you will work on core infrastructure and simulation tooling, collaborating with design and product teams. Ideal candidates have 5+ years in software development, fluent in Python and TypeScript, and frontend expertise with frameworks like React and Vue. Join Ark to tackle challenging problems in biomanufacturing and contribute to life-saving medical breakthroughs.

Qualifications

• 5+ years of experience in professional software development.
• 4+ years of frontend experience with frameworks like React or Vue.
• Strong foundation in testing and modular system design.

Responsibilities

• Build and maintain scalable, type-safe services.
• Develop responsive SPAs using modern frameworks.
• Design and manage shared schemas using OpenAPI.

Skills

Python

TypeScript

Go

React

Vue

Docker

CI/CD best practices

Tools

Zod

openapi-typescript

Redux

Kubernetes

Job description

Overview

Ark is building the world’s highest-fidelity bioprocess simulation software so cutting edge science reaches those who need it most. Through democratizing complex multi-physics models in an easy to use software interface, Ark’s changing the way biopharma scientists work, ensuring that more medical breakthroughs break through from the lab to the world – faster. With Ark’s software, scientists can replace slow (multi-week), expensive ($10K-1M+) experiments with simulations that run in seconds! Ark is ushering in a new era of bioprocess, where scientists can run 10,000x as many experiments, making sure more life-saving medicine reaches those who need it most.

About the role

Ark is seeking a full-stack Senior Software Engineer to join our fast-moving startup tackling some of the hardest problems in biomanufacturing. This is a high-ownership role focused on building core infrastructure, simulation tooling, and production-grade features that power our digital bioprocess platform. You’ll collaborate closely with our world-class modeling, design, and product teams to create performant, scalable systems. From monorepo architecture to cross-platform type sharing, you’ll help define engineering excellence at Ark.

Responsibilities

• Backend ownership– Build and maintain scalable, type-safe services in a polyglot environment (Python, TypeScript, Go).
• Frontend engineering– Develop responsive SPAs using modern frameworks like React or Vue; optimize for performance and UX.
• Shared types & APIs– Design and manage shared schemas using OpenAPI, JSON Schema, and tools like Zod and openapi-typescript.
• Infrastructure & workflows– Maintain CI/CD pipelines, containerized environments with Docker, and IaC solutions.
• Code quality & design– Write clean, modular code with strong testing and Git workflows; contribute to a shared culture of engineering maturity.
• Cross-functional collaboration– Partner with bioprocess modelers and designers to ship production-ready simulations and interfaces.

Qualifications

• 5+ years of experience in professional software development, with fluency in Python, Go, TypeScript, or similar strongly typed language.
• 4+ years of frontend experience with frameworks like React, Vue, or Svelte
• Comfortable navigating polyglot codebases with shared types and monorepo setups
• Deep understanding of frontend component architecture and state management (e.g., Zustand, Redux, Pinia)
• Strong foundation in testing, modular system design, Git workflows, and asynchronous team communication
• Experience with Docker-based development and CI/CD best practices
• Bonus: Exposure to systems languages (Rust, Java, C#, C++) or Kubernetes

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Engineering and Information Technology