Senior Software Engineer, Front End

ABOUT PIONEERING INTELLIGENCE

Pioneering Intelligence builds on Flagship Pioneerings legacy of founding cutting-edge science and computational ventures harnessing recent advances in AI machine learning and data to accelerate fundamental research and create a portfolio of AI-first companies. As part of Flagships integrated model of science entrepreneurship and capital it transforms breakthrough ideas into world-changing companies elevating the AI advances happening across the ecosystem in human health sustainability and beyond.

Position Summary

We are seeking a Senior Front End Engineer. As a key contributorin this early-stage initiative you will architect and implement the user experience for a new platform that leverages large language models (LLMs) and AI agents to enhance complex high-stakes workflows. This is a user-first AI-augmented product your work will transform abstract reasoning tasks into intuitive high-performance tools that empower experts across diverse research domains. You will lead front-end development and collaborate closely with engineers AI scientists product designers and end users. This is a rare opportunity to shape a greenfield product at the intersection of usability flexibility and advanced reasoning.

Key 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 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.

Qualifications

• 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 TypeScript Tailwind CSS Redux Toolkit Playwright and Shadcn.
• Strong experience with .
• 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 Qualifications

• Background in scientific domains such as biology chemistry or complex systems (a plus not ).

Why Join Us

By joining this initiative within Flagships Pioneering Intelligence group you will:

• Help define a new category of intelligent software tools for real-time humanAI collaboration.
• Build a greenfield product at the intersection of usability reasoning and scientific innovation.
• Collaborate with visionary thinkers and top-tier researchers across Flagships ecosystem.
• Thrive in a supportive mission-driven culture with access to world-class technical and operational resources.
• Shape the future of AI-powered discovery in a role that combines engineering excellence with health impact.

About Flagship Pioneering

Flagship Pioneering invents and builds platform companies each with the potential for multiple products that transform human health sustainability and beyond. Since its launch in 2000 Flagship has originated more than 100 companies. Many of these companies have addressed humanitys most urgent challenges: vaccinating billions of people against COVID-19 curing intractable diseases improving human health preempting illness and feeding the world by improving the resiliency and sustainability of agriculture.

Flagship has been recognized twice on FORTUNEs Change the World list an annual ranking of companies that have made a positive social and environmental impact through activities that are part of their core business strategies and has been twice named to Fast Companys annual list of the Worlds Most Innovative Companies. Learn more about Flagship at.

At Flagship we accept impossible missions to enable bigger leaps. Our core values guide us through uncertainty and toward lasting impact.

We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to race color religion sex sexual orientation gender identity national origin disability protected veteran status or any other characteristic protected by law.

We recognize that great candidates often bring unique strengths without fulfilling every qualification. If you have some of the experience listed above but not all please apply anyway. We are dedicated to building diverse and inclusive teams and look forward to learning more about your background and interest in Flagship.

Recruitment & Staffing Agencies: Flagship Pioneering and its affiliated Flagship Lab companies (collectively FSP) do not accept unsolicited resumes from any source other than candidates. The submission of unsolicited resumes by recruitment or staffing agencies to FSP or its employees is strictly prohibited unless contacted directly by Flagship Pioneerings internal Talent Acquisition team. Any resume submitted by an agency in the absence of a signed agreement will automatically become the property of FSP and FSP will not owe any referral or other fees with respect thereto.

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The salary range for this role is $108000 - $176000. Compensation for the role will depend on a number of factors including a candidates qualifications skills competencies and experience. Pioneering Intelligence currently offers healthcare coverage annual incentive program retirement benefits and a broad range of other benefits. Compensation and benefits information is based on Pioneering Intelligences good faith estimate as of the date of publication and may be modified in the future.

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