Senior Backend Developer

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The Company

FL100, Inc. is a privately held, early-stage company pioneering the use of artificial intelligence-based agents to build an integrated, end-to-end platform for AI-driven product innovation. FL100 has created intelligent and reliable AI agent-powered workflows for emergent product innovation. Emergent product innovation leads to new products with breakthrough market adoption that generate new sources of value by solving for large unmet consumer needs and creating demand that did not exist previously.

We're leveraging multi-agent systems to accelerate growth, speed up product design innovation, and automate e-commerce operations. Our vision is to create a multi-platform service that empowers anyone to build and operate an e-commerce business efficiently. Currently, we offer a Shopify app that demonstrates our capabilities, with plans to expand across various e-commerce platforms and online marketplace.

FL100 is backed by Flagship Pioneering, an innovation enterprise that conceives, creates, resources, and builds companies that invent breakthrough technologies to transform health care, agriculture, and sustainability. Flagship has created over 100 groundbreaking companies since 2000, including Moderna.

The Role

We’re seeking a skilled Senior Backend Developer with 5+ years of industry experience who has successfully shipped SaaS products. In this role, you will architect and implement backend services that power our multi-agent system for e-commerce automation. You’ll work closely with our AI/ML teams to translate AI-driven concepts into scalable, production-ready applications, ensuring robust integrations with various e-commerce platforms (e.g., Shopify, WooCommerce) and online marketplace (e.g., Amazon, eBay). Your ability to deliver high-performing, secure, and maintainable systems will directly influence our platform’s success.

Key Responsibilities

  • Design and develop scalable backend services for our AI-driven multi-agent platform.
  • Integrate with third-party e-commerce (Shopify, WooCommerce) and online marketplace (e.g., Amazon, eBay) to ensure seamless data flow and user experiences.
  • Collaborate with AI/ML researchers to transform complex AI workflows into production-ready APIs and services.
  • Contribute to microservices architecture by developing modular, reusable services that align with best practices in backend engineering.
  • Implement CI/CD pipelines and automated testing frameworks to ensure reliable and efficient deployment of new features.
  • Optimize performance by monitoring key metrics, identifying bottlenecks, and implementing improvements at both the code and infrastructure layers.
  • Participate in code reviews and provide mentorship to junior developers, fostering a culture of high-quality code and continuous learning.
  • Collaborate with product managers to ensure technical implementations align with business objectives and customer needs.
  • Stay current with emerging technologies, AI integrations, and cloud services to continuously improve our backend systems.

Qualifications

  • 5+ years of professional experience in backend or full-stack software development.
  • Proven track record of shipping SaaS products with high availability and scalability.
  • Proficiency in Python (preferred) or other modern backend languages (e.g., Node.js, Go).
  • Experience building and consuming RESTful APIs, with familiarity in microservices and serverless architectures.
  • Solid cloud experience, preferably on AWS (Lambda, ECS/Fargate, RDS, S3, etc.).
  • Database expertise in SQL and NoSQL (e.g., PostgreSQL, MongoDB).
  • DevOps and CI/CD exposure (Docker, Kubernetes, Git, Terraform, or similar).
  • Strong problem-solving skills and ability to work in a fast-paced environment.
  • Excellent communication and collaboration skills.

Preferred Qualifications

  • Familiarity with LLMs and Agentic systems.
  • Experience API integrations with e-commerce platforms (Shopify, WooCommerce and online marketplace (e.g., Amazon, eBay)
  • Advanced degree in Computer Science, AI, or a related field.
  • Experience with FastAPI or Flask for backend services.
  • Knowledge of additional cloud services (e.g., GCP, Azure).
  • AWS certifications (e.g., Solutions Architect).
  • Front-end exposure to React or other modern frameworks.
  • Experience with mobile app development (React Native).

Values and Behaviors

  • A constant learner with a passion for emerging technologies and their business applications
  • Customer-obsessed, with a keen ability to empathize with user needs and translate them into product features
  • Motivated and team-oriented, with an ability to thrive in a multidisciplinary environment
  • Mission-oriented and dedicated to bringing breakthrough AI technologies to customers
  • Entrepreneurial, pioneering spirit with the ability to navigate ambiguity and drive results
  • Works with velocity and carries a great sense of urgency
  • Excellent collaborator, able to work effectively with diverse teams and stakeholders
  • Holds oneself and others accountable for commitments in an assertive and positive manner
  • Fosters a growth-oriented, high-energy environment
  • An innovative mindset with a passion for leveraging technology to improve customer experiences and business outcomes

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 at www.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.

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