Flagship Pioneering · 2 hours ago
Senior Software Engineer, Front End
Cambridge, MA USA
Full-time
Onsite
Mid, Senior Level
$108K/yr - $176K/yr
6+ years expFlagship Pioneering is a biotechnology company that invents and builds platform companies aimed at transforming human health and sustainability. They are seeking a Senior Front-End Software Engineer to design, integrate, and deploy web-based applications that facilitate human–AI collaboration, contributing to the development of user-centric, LLM-enabled platforms.
FinanceFinancial ServicesVenture Capital
Responsibilities
Architect, develop, and maintain high-quality, testable front-end code and workflows aligned with complex scientific and analytical use cases
Translate user stories, wireframes, and prototypes into production-ready features emphasizing clarity, maintainability, and reusability
Implement responsive, accessible, and performant UIs optimized for data-rich, interactive workflows
Ensure security, scalability, and observability of front-end services in cloud environments (AWS)
Design and implement user interfaces from scratch, combining strong visual design with robust engineering
Create and maintain scalable, consistent, and visually appealing UI components using a modern React.js stack
Maintain front-end quality through comprehensive testing and validation of user flows and interface behavior
Develop and maintain test suites (unit, integration, and end-to-end) for UI reliability
Apply DevOps/GitOps practices for automated testing, deployment, and monitoring
Mentor engineers and scientists, driving technical quality and ensuring extensibility and performance across evolving use cases
Qualification
Required
B.S. in Computer Science, Engineering, or related field, with 6+ years of professional software development experience
Expertise with modern front-end frameworks and tools, including React.js, TypeScript, Tailwind CSS, Redux Toolkit, Playwright, and Shadcn
Strong experience with Node.js
Skilled in writing and maintaining comprehensive test suites (Jest, React Testing Library, Cypress)
Experience with system design, performance optimization, observability, and operational excellence for parallel LLM workloads
Strong intuition for UX design and a passion for building intuitive, workflow-first products
Excellent communication skills and a collaborative mindset in fast-moving, cross-functional environments
Preferred
Background in scientific domains such as biology, chemistry, or complex systems (a plus, not required)
Benefits
Healthcare coverage
Annual incentive program
Retirement benefits
Broad range of other benefits
Company
Flagship Pioneering
Flagship Pioneering is a venture capital firm that invests in life sciences and healthcare companies.
501-1000 employees
H1B Sponsorship
Flagship Pioneering has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (8)
2024 (4)
2023 (4)
2022 (4)
2021 (1)
Funding
Current Stage
Late StageLeadership Team
Noubar Afeyan
Founder and CEO
Chuck Carelli
Chief Financial Officer
Recent News
2026-01-16
2026-01-16
Company data provided by crunchbase