Senior Software Engineer, Ecomm

FERMÀT enables eCommerce brands to transform clicks into conversions with highly-personalized , 1:1 dynamic shopping experiences.

We've raised $30M+ to date and are backed by Bain Capital Ventures, Greylock, QED, and other top angels and commerce investors. Located in SF, Austin, NYC, and Bangalore, we're looking to expand our 70+ person team to build the future of eCommerce! After announcing our $17M Series A, FERMÀT is one of the fastest growing companies at this stage in the US.

FERMÀT is the leading AI-native funnel management platform built for e-commerce marketers. We empower brands to create and manage delightful customer experiences across multiple channels in minutes. Our platform helps businesses transform their digital presence through intelligent, data-driven funnel creation that strengthens customer acquisition and drives measurable results. With FERMÀT, e-commerce teams can rapidly built, test and iterate on their customer journey while maintaining brand consistency across every touchpoint.

As a Senior Software Engineer on the Ecommerce Integrations team, you’ll play a pivotal role in accelerating FERMÀT’s growth by developing and owning end-to-end integrations with diverse ecommerce platforms. Your work will serve as the essential connective tissue linking external ecommerce platforms with our foundational internal architecture. Each new platform and customer presents unique technical challenges, and you’ll skillfully balance rapid, incremental feature delivery with designing scalable, sustainable solutions for long-term growth.

You’ll collaborate directly with technical teams from customer organizations to craft effective integration strategies and resolve technical complexities. In close partnership with our foundational Platform team, you’ll ensure your integrations seamlessly align with the broader internal architecture powering FERMÀT’s entire commerce ecosystem. The integrations you build will have wide-reaching visibility and influence across the entire organization.

Responsibilities:

• Design, develop, and maintain end-to-end integrations with a variety of external ecommerce platforms, operating with a high degree of autonomy.

• Ensure a consistent, stable, and scalable integration layer that supports multiple platforms and adapts fast to evolving requirements.

• Collaborate directly with customers’ technical teams to design integration solutions, provide implementation guidance, and troubleshoot technical issues.

• Take full ownership of integrations throughout their lifecycle—including monitoring for breaking changes, tracking deprecated versions, and executing seamless migrations.

• Work closely with FERMÀT’s Platform Architecture team to ensure integrations align with and feed cleanly into our internal systems.

• Build robust observability into integrations by implementing logging, monitoring, and alerting to ensure high reliability and fast issue resolution.

• Partner with internal stakeholders, including product, engineering, and customer-facing teams, to deliver high-impact features and support strategic initiatives.

Requirements:

• Energized by startup momentum and takes ownership in transforming complex challenges into elegant solutions.

• Strong communication skills to be able to interface with customers as well as internal teams on the integration aspects.

• Experienced with Go, Python, or other modern backend languages

• Strong understanding of API design principles and best practices

• Proficient with distributed systems design and scaling microservices

• Familiar with data warehouses and other storage systems(Relational databases, key-value stores, cloud buckets etc)

• Experienced with cloud infrastructure (preferably Google Cloud)

Nice to haves:

• Experience with GraphQL API design

• Familiarity with containerization and orchestration (Docker, Kubernetes)

• Previous work in eCommerce or adtech domains

• Experience with subscription-based payment models

Tech stack:

• Golang

• Typescript

• React

• Nextjs

• Postgres

• Google cloud

Benefits

• Competitive salary + equity package

• Comprehensive health, dental, and vision insurance for you and all your dependents.

• Retirement benefits:

  • US: 401(k) plan with 4% matching

  • India: Provident Fund with 12% matching

• 4 months of paid parental leave

• Unlimited PTO policy (with minimum 5 days PTO / quarter!)

• WFH stipend

• Monthly wellness stipend