Full-Stack Developer (FE Focus)

Join to apply for the Full-Stack Developer (FE Focus) role at Joy_

Join to apply for the Full-Stack Developer (FE Focus) role at Joy_

At Joy_ we’re turning every product on the internet into a potential moment of appreciation.

Our infrastructure stitches together live merchant feeds, AI-powered search and instant checkout rails so brands can offer any product online, in real time, through a single API.

That engine powers a new class of experiences:

• Commerce infrastructure for retailers – plug Joy_ into site-search or checkout to fill “out-of-stock” gaps, drop-ship on demand and grow assortment with zero inventory or new workflows.
• Gift cards that aren’t stuck in walled gardens – branded, media-rich and redeemable for millions of items instead of a single store.
• Loyalty & rewards that feel personal – users save for the exact product they want, not a generic catalogue.
• Employee benefits that people actually use – from monthly stipends to one-off “thank-yous”, all white-labelled and API-first.

Because everything is virtual we need no warehouses, no middlemen and zero extra stock; partners keep the margin while customers enjoy true flexibility.

Whether you’re an e-commerce giant filling assortment gaps, a fintech nudging action with meaningful rewards, or an HR platform boosting engagement, Joy_ is building the infrastructure for the future of commerce.

At Joy_ we’re turning every product on the internet into a potential moment of appreciation.

Our infrastructure stitches together live merchant feeds, AI-powered search and instant checkout rails so brands can offer any product online, in real time, through a single API.

That engine powers a new class of experiences:

• Commerce infrastructure for retailers – plug Joy_ into site-search or checkout to fill “out-of-stock” gaps, drop-ship on demand and grow assortment with zero inventory or new workflows.


• Gift cards that aren’t stuck in walled gardens – branded, media-rich and redeemable for millions of items instead of a single store.


• Loyalty & rewards that feel personal – users save for the exact product they want, not a generic catalogue.


• Employee benefits that people actually use – from monthly stipends to one-off “thank-yous”, all white-labelled and API-first.

Because everything is virtual we need no warehouses, no middlemen and zero extra stock; partners keep the margin while customers enjoy true flexibility.

Whether you’re an e-commerce giant filling assortment gaps, a fintech nudging action with meaningful rewards, or an HR platform boosting engagement, Joy_ is building the infrastructure for the future of commerce.

As our second dedicated engineer on the client side, you will:

• Own the entire front-end experience—from design critique to pixel-perfect implementation—and contribute to the Python back-end when needed.


• Craft elegant, responsive UIs for customers (B2C gift card flows) and partners (B2B self-serve dashboards, embeddable widgets).


• Shape component libraries, design tokens, and accessibility guidelines in a company with focused product-management and design resources.


• Pair with founders on product discovery, run quick experiments, and measure impact.


• Review code and mentor future team-mates.

What we're looking for

• 3+ years of professional experience building modern web products, with Vue knowledge (or React/Angular expertise with enthusiasm to learn Vue).


• Solid Python skills: comfortable adding endpoints, optimizing queries, and debugging async workers.


• Strong design sensibility—at ease discussing typography, layout grids, and motion; proficient with Figma.


• Pragmatic testing approach (unit + e2e) and dedication to performance and accessibility.


• Excellent spoken and written English.

Nice to have

• Experience with payments, e-commerce, or loyalty/rewards products.


• Familiarity with experiments/A-B testing frameworks and event analytics.


• Experience with design systems or Storybook, and infrastructure-as-code (Terraform, Pulumi).


• Working knowledge of SQL, RESTful API design, GitHub Actions (or similar), and containerized deployments on Kubernetes.

How we work & what you get

• Small, senior team & big ownership – ship end-to-end features in days, not quarters.


• Hybrid-friendly – our office is in Berlin, with team members across Europe (regular in-person meetings).


• Competitive salary + meaningful equity – we want you to win with us.


• Purposeful product – build tech that makes giving (and getting) gifts more personal, sustainable, and joyful.

Sounds like you?

Send a quick note, your GitHub or portfolio, and a short example of a UI you're proud of. No formal cover letter needed—just tell us _why Joy__ and how you can make an impact.

We can't wait to build the future of commerce together!

At Joy_, we place great value on equal opportunities. We believe that an outstanding work environment should reflect a diversity of backgrounds, talents, and thoughts. Together, we grow as a team based on our individual strengths. Every personnel decision is made solely based on qualifications, performance, and the requirements of the company.

Seniority level

• Seniority level

  Associate

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Administrative and Support Services

Referrals increase your chances of interviewing at Joy_ by 2x

Sign in to set job alerts for “Full Stack Engineer” roles.

Berlin, Berlin, Germany $60,000 - $96,000 2 weeks ago

Software Engineer - Frontend (Working Student)

Frontend software engineer (React) - Europe Remote

Junior Software Engineer – Game Development (all genders welcome) – Berlin oder 100 % remote

Frontend Developer / Remote within Germany (All genders)

Frontend Developer (All genders) - Remote within Germany

Mainz, Rhineland-Palatinate, Germany 1 month ago

Cologne, North Rhine-Westphalia, Germany 1 week ago

Frontend Developer (m/w/d) - in SaaS Startup (Remote / Hybrid)

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.