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Our Story

Engineering-Led, From Day One

Most agencies start with design and hope the technology works. We started the other way around. After a decade building and scaling commerce platforms at Rocket Internet, Vodafone, and Learnship — migrating from Magento and Salesforce Commerce Cloud, running platforms that handled sudden spikes in traffic and demand — we saw the same pattern everywhere: beautiful storefronts that broke under real-world conditions.

27street was founded in 2015 on a conviction: commerce should be engineered first, then made beautiful. Engineering discipline — reliable architecture, clean integrations, measurable performance — is what separates stores that convert from stores that just look good.

Today, 37 engineers, designers, and commerce specialists across Berlin and Varna build the Shopify stores, apps, and integrations that ambitious merchants rely on to grow. 90% of our clients have worked with us for more than two years. Not because we lock them in, but because the work keeps compounding.

Meet the Team

Shopify Experts

As certified Shopify Experts, we help merchants get the most out of the platform. From setup to scale, we are your technical partner.

Portrait of Gero Keller, founder of 27street

Gero Keller

Founder & Shopify Engineering Partner

Ecommerce architectureMigrations to ShopifyProduct & engineering leadershipData-driven delivery

Gero grew up during the ecommerce revolution, building and scaling online businesses from the early Rocket Internet days to Vodafone and Learnship. As Head of Engineering at a Rocket Internet automotive marketplace, he worked in true hyperscaler mode: fast iteration, data-driven decisions, and platforms designed to cope with sudden spikes in traffic and demand.

Later, with crvsh, he ran a product studio that operated like an in-house agency for Vodafone. They owned the full digital customer journey for launches like V by Vodafone and Vodafone Smart Tech – from discovery and UX through to the commerce flows that actually convert.

Most recently, as CTPO at Learnship, Gero rebuilt the ecommerce setup from scratch, moving from a patchwork of in-house systems, Magento Cloud, and Salesforce Commerce Cloud to a focused Shopify-based stack that enabled new business models and faster iteration.

Today at 27street, he combines that experience to help merchants design and implement Shopify setups that are commercially sharp, technically robust, and ready to scale.

How I can help on Shopify

  • Designing and implementing ecommerce architectures that balance flexibility with operational simplicity
  • Migrating from legacy stacks (Magento, Salesforce Commerce Cloud, custom builds) to Shopify
  • Building custom apps, integrations, and automation to support your specific business model
  • Improving performance, reliability, and developer workflows so changes become cheaper and faster over time

Highlights

  • 20–25% faster cycle times (Swarmia case study)
  • Ecommerce migrations from Magento & Salesforce Commerce Cloud to Shopify
  • Former CTPO at Learnship and product studio lead for Vodafone (crvsh)
  • Experience with global B2B and consumer ecommerce for businesses of all sizes
Read the Swarmia case study
Portrait of Fabio Carneiro, Director of Merchant Solutions

Fabio Carneiro

Director of Merchant Solutions

Software Engineering LeadershipMarketplaces & SaaSArchitecture & DeliveryShopify Solutions

Fabio combines deep technical expertise with a strategic view of ecommerce. With over 15 years of leadership in software engineering, he doesn't just build systems; he designs technical strategies that align with business goals. His background spanning SRE, QA, and Development means he builds stores that are not only feature-rich but also stable, scalable, and easy to operate.

Before joining 27street, Fabio led engineering organisations at Learnship and Carmudi, where he was known for his tremendous sense of ownership and ability to drive cost efficiency alongside user experience improvements. He brings this same level of accountability to every merchant project, ensuring that delivery is predictable, transparent, and focused on tangible results.

At 27street, Fabio acts as a true technical partner for merchants. He cuts through complexity to find the right solution for your stage of growth—avoiding over-engineering while ensuring your setup is robust enough to scale. Whether it's a complex migration or a custom integration, Fabio ensures the technology serves your business, not the other way around.

How I can help on Shopify

  • Designing Shopify setups, integrations, and internal tools that are reliable, maintainable, and cost-efficient
  • Helping merchants choose the right level of solution for their stage and budget
  • Understanding the real business problem first to avoid over-engineering

Highlights

  • 15+ years in software engineering and leadership
  • VP of Software Engineering at Learnship
  • Head of Engineering at Carmudi
  • CTO at Squid Facil & Co-Founder/CTO at Layer

Meet the Team

Portrait of Sarah Jenkins

Sarah Jenkins

Senior Shopify Developer

Sarah is a certified Shopify expert with 5 years of experience building custom themes and apps. She specializes in performance optimization and headless commerce.

Portrait of Mike Chen

Mike Chen

Frontend Engineer

Mike brings designs to life with pixel-perfect precision. He has a background in UX design and ensures that every store we build offers an exceptional user experience.

Portrait of Elena Rodriguez

Elena Rodriguez

Project Manager

Elena keeps our projects on track and ensures clear communication. She has managed over 50 successful Shopify launches and migrations.

Portrait of David Kim

David Kim

Backend Developer

David handles complex integrations and data migrations. He loves solving difficult technical challenges and automating workflows for merchants.

Portrait of Felix Kohl

Felix Kohl

Operations Manager

Felix ensures smooth operations and efficient processes across all our projects. He keeps the team organized and focused on delivering value to our clients.