Senior Engineer, Fullstack - Growth

Join a remote-first engineering team building innovative infrastructure that simplifies global payments and helps businesses optimize their payment operations. As a Senior Fullstack Engineer focused on Growth, you will lead the frontend architecture and technical direction of the self-service onboarding experience, helping merchants move from account creation to their first live payment. You will play a key role in shaping a newly established product area, with significant autonomy over technical decisions and engineering standards. Working closely with Design and Product, you will turn complex requirements into intuitive, high-quality user experiences. You will also mentor engineers, establish best practices, and contribute to backend development when needed. This is an opportunity to make a meaningful impact in a collaborative, globally distributed environment where initiative and technical leadership are highly valued.

The ideal candidate brings strong frontend engineering expertise, proven technical leadership, and the confidence to shape architecture and engineering standards in a team that is still taking form. You should be comfortable working autonomously, mentoring others, and contributing beyond your primary area of expertise.

• Demonstrated experience architecting and building complex frontend applications in production environments.

• Strong frontend engineering skills, including the ability to make sound architectural decisions rather than simply implementing existing design systems.

• Confidence acting as the most senior frontend technical voice on a team, including constructively challenging product and design decisions when technical considerations require it.

• Some backend development experience and a genuine willingness to work with Python codebases; deep Python expertise is not required.

• Experience mentoring other engineers, ideally including early-career team members.

• Ability to work independently, establish appropriate technical standards, and make decisions without relying on extensive guidance.

• Strong collaboration and communication skills, with the ability to work effectively with Design, Product, and Engineering colleagues.

• Adaptability and comfort with ambiguity, particularly in a newly formed team where processes and tools are still evolving.

• Experience building or integrating payment products.

• Experience working on growth-oriented product experiences, particularly merchant onboarding, activation, or self-service journeys.