Flagship Pioneering
Extuitive, Inc. | Cambridge, MA Senior Backend Developer
Flagship Pioneering, Oklahoma City, Oklahoma, United States
Extuitive is a Flagship Pioneering–backed startup reimagining product innovation for the AI era. Our mission is to empower entrepreneurs and direct-to-consumer (D2C) brands with AI-driven tools that simplify, accelerate, and scale the launch of new products. Based in Cambridge, MA, we operate like a special ops unit—fast-moving, data-driven, and relentlessly focused on impact.
About the Role
As a senior backend engineer, you will be instrumental in delivering architecture improvements that will scale our platform . You’ll collaborate closely with product managers, designers, and other engineers to translate complex requirements into elegant, responsive, and performant interfaces. Beyond building, you’ll set standards, mentor peers, and play a key role in scaling both our product and our engineering practices. Specifically, you will:
Responsibilities
Build and Scale the Core Infrastructure - Design and implement the foundational backend architecture (APIs, databases, services)
Own End-to-End Backend Features - Translate product requirements into backend solutions — from data modeling to API design to deployment.
Collaborate Closely with Product & Frontend - Partner with product managers and frontend engineers to deliver user-facing functionality that feels seamless.
Handle Data & Integrations - Own the data layer (schema design, migrations, query optimization),
Introduce coding standards, testing practices, CI/CD pipelines, and monitoring/observability from the start.
Requirements
5+ years of professional back-end development experience
Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent experience)
Expertise in back-end technologies, including Python, Node.js, FastAPI, and Supabase
Strong knowledge of databases: schema design, query optimization, and performance tuning
Familiarity with DevOps practices, including CI/CD pipelines, monitoring, logging, and observability tools
Experience building real-time systems (e.g., WebSockets, data streaming) and/or AI/ML-powered applications
Commitment to clean, maintainable code and a passion for establishing best practices
Thrives in fast-paced startup environments, with adaptability to shifting priorities
More About Flagship Pioneering
Flagship Pioneering is a bioplatform innovation company that invents and builds platform companies, each with the potential for multiple products that transform human health or sustainability. Since its launch in 2000, Flagship has originated and fostered more than 100 scientific ventures, resulting in more than $90 billion in aggregate value. Many of the companies Flagship has founded have addressed humanity’s 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 FORTUNE’s “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 Company’s annual list of the World’s Most Innovative Companies. Learn more about Flagship atwww.flagshippioneering.com .
Flagship Pioneering and our ecosystem companies are committed to equal employment opportunity
regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. At Flagship, we recognize there is no perfect candidate. If you have some of the experience listed above but not all, please apply anyway. Experience comes in many forms, skills are transferable, and passion goes a long way. We are dedicated to building diverse and inclusive teams and look forward to learning more about your unique background. 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 Pioneering’s 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. Create a Job Alert Interested in building your career at Flagship Pioneering, Inc.? Get future opportunities sent straight to your email. Apply for this job
* indicates a required field First Name * Last Name * Email * Phone * Location (City) Resume/CV * Enter manually Accepted file types: pdf, doc, docx, txt, rtf Enter manually Accepted file types: pdf, doc, docx, txt, rtf Employment Title Select... Start date year End date month Select... End date year Current role Will you now or in the future require sponsorship for employment visa status (e.g., H-1B visa status)? * Select... If you'll require the company to commence ("sponsor") an immigration or work permit case in order to employ you, either now or at some point in the future, then you should select Yes. Otherwise, select No. Do you currently reside within the continental United States? * Select... How active are you in your job search? * Select... Are you located in the greater Boston area, or are you willing to relocate for this position? * Select... When are you able to start a new position? * Do you have 5+ years of professional backend development experience? * Select... Are you proficient in Python and have you built production-grade APIs (RESTful and/or GraphQL)? * Select... Are you comfortable with DevOps practices, including CI/CD pipelines, monitoring, logging, and observability tools? * Select... Do you have experience with cloud platforms (AWS, GCP, or Azure) and containerization/orchestration (Docker, Kubernetes)? * Select... Have you built or worked on real-time systems (e.g., WebSockets, data streaming) or AI/ML-powered applications? * Select... Do you have strong experience with databases (schema design, query optimization, performance tuning) and have you worked with Supabase or similar platforms? * Select...
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regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. At Flagship, we recognize there is no perfect candidate. If you have some of the experience listed above but not all, please apply anyway. Experience comes in many forms, skills are transferable, and passion goes a long way. We are dedicated to building diverse and inclusive teams and look forward to learning more about your unique background. 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 Pioneering’s 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. Create a Job Alert Interested in building your career at Flagship Pioneering, Inc.? Get future opportunities sent straight to your email. Apply for this job
* indicates a required field First Name * Last Name * Email * Phone * Location (City) Resume/CV * Enter manually Accepted file types: pdf, doc, docx, txt, rtf Enter manually Accepted file types: pdf, doc, docx, txt, rtf Employment Title Select... Start date year End date month Select... End date year Current role Will you now or in the future require sponsorship for employment visa status (e.g., H-1B visa status)? * Select... If you'll require the company to commence ("sponsor") an immigration or work permit case in order to employ you, either now or at some point in the future, then you should select Yes. Otherwise, select No. Do you currently reside within the continental United States? * Select... How active are you in your job search? * Select... Are you located in the greater Boston area, or are you willing to relocate for this position? * Select... When are you able to start a new position? * Do you have 5+ years of professional backend development experience? * Select... Are you proficient in Python and have you built production-grade APIs (RESTful and/or GraphQL)? * Select... Are you comfortable with DevOps practices, including CI/CD pipelines, monitoring, logging, and observability tools? * Select... Do you have experience with cloud platforms (AWS, GCP, or Azure) and containerization/orchestration (Docker, Kubernetes)? * Select... Have you built or worked on real-time systems (e.g., WebSockets, data streaming) or AI/ML-powered applications? * Select... Do you have strong experience with databases (schema design, query optimization, performance tuning) and have you worked with Supabase or similar platforms? * Select...
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