Sr. Full Stack Engineer

Tapcart; Santa Monica (CA); Hybrid; USD 175,000 - 350,000; Full time

Benefits offered by this job

Competitive salary and equity

Medical, dental, and vision

401(k)

Flexible PTO

Remote-friendly

Home office stipend

Quarterly merchant stipend

Swag drops

Job summary

Tapcart, based in Santa Monica, is seeking skilled engineers to work on a mobile commerce platform that powers top brands like Forever 21 and Princess Polly. You'll architect and ship core products that deliver impact, all while collaborating with key stakeholders and maintaining high-quality standards.

The role emphasizes engineering craft and offers a unique opportunity to work in a fast-paced environment where your contributions directly affect hundreds of millions of users. Competitive salary and benefits included.

Qualifications

• 5+ years of engineering and product work is required.
• Demonstrated skills across frontend, backend and database layers.

Responsibilities

• Architect and ship core product that feels durable, fast and clean.
• Design proactive AI agent orchestration layers.
• Prototype new interaction patterns for collaboration.

Skills

Engineering experience

Frontend development

Backend development

Database management

GitHub proficiency

Job description

At Tapcart, we believe every brand needs a direct relationship with their customers - one they actually own.

We are the mobile commerce engine that powers shopping for Shopify's fastest‑growing brands. $15B+ in revenue processed. 200M+ shoppers worldwide. Brands like Princess Polly, Béis, Forever 21, and Young LA rely on us to power a large portion of their revenue.

We're a lean team with minimal management and big autonomy. Everyone here builds and code is core to what we do — engineers, product, leadership. We use our own platform, we talk to merchants daily, and we ship constantly. Backed by Shopify, Silver Lake and other top VCs. Profitable and growing.

If you want a place where you own real outcomes, not just tickets, you'll fit in.

Why you should join Tapcart, when you have a sea of other options?

• You want to work with colleagues who have high standards and who love building beautiful, performant software
• You prefer the dopamine of working on software that will get into hundreds of millions of users' hands, vs working on enterprise, forward‑deployed software

We deeply care about using AI in our work. Don't proceed with applying if:

• You don't love agents / don't use them daily
• You don't value craft and cannot speak to software that inspires you

What you’ll be working on at Tapcart

• Architect and ship core product that feels durable, fast and clean. Work across multiple stacks to deliver impact.
• Design our proactive AI agent orchestration layers used by thousands of high‑growth brands
• Prototype new interaction patterns for human–agent collaboration
• Raise our bar for engineering craft, help with recruiting, and hold the line on quality
• Dogfood the platform and our apps every day :)

You’ll be a true owner, from prototype to production, and work side‑by‑side with the CEO, design, and key stakeholders, all while staying close to merchants to deliver value early and iterate quickly.

Qualifications

• 5+ years of engineering and product work
• Demonstrated skills across frontend, backend and database layers
• A GitHub that is more green than black

Salary Range

$175,000 – $350,000 - we pay for exceptional.

Benefits

Competitive salary and equity. Medical, dental, vision. 401(k). Flexible PTO. Remote‑friendly. Home office stipend. Quarterly merchant stipend. Lots of swag drops.