Your full-service B2C & B2B digital agency
Delivering Digital Excellence in E-Commerce
As a Berlin-based digital agency, we develop scalable e-commerce solutions, high-performance websites, and custom software—with a focus on increased visibility, conversions, and efficient processes. With over 20 years of experience, we support companies every step of the way, from strategy to technical implementation.
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Why ACID21?
Because we are problem solvers from conviction.
As an e-commerce agency based in Berlin, we combine design, technology, and data-driven marketing—all under one roof. Our teams develop digital products that not only look great but also deliver measurable results: increased traffic, rising conversion rates, and scalable processes. Executives, marketing teams, and retailers benefit from our technical expertise in Shopware, custom web apps, and automated systems. Every project is developed in close collaboration with our clients—agilely, transparently, and with clear key performance indicators.
E-Commerce
Excellence
Online shop development with Shopware & Shopify
As a certified Shopware partner, we develop scalable online stores based on Shopware—featuring modern design, high performance, and a clean technical structure. From product data management and custom features to ERP, PIM, payment, and logistics integration, we create e-commerce solutions that work reliably and drive sales.
Our focus is on conversion optimization, a seamless user experience, and automated processes to help online stores grow over the long term. Whether it’s a relaunch, an international rollout, or complex system environments, we support companies from strategy through to go-live and beyond with ongoing support and hosting.
Mobile
Innovation
Development of native apps for iOS & Android
We develop mobile solutions that work quickly, intuitively, and reliably on any device: from responsive websites and progressive web apps to native apps for iOS and Android.
UX design and loading speed play a central role in this—every app is technically optimized, GDPR-compliant, and future-proof. Our mobile applications help companies strengthen customer loyalty, digitize services, and simplify complex processes.
Custom
Software
Web platforms and customised software
Custom software means digital solutions without compromise. We develop business portals, interfaces, data dashboards, and automated processes that fit seamlessly with existing systems—rather than the other way around.
All applications are built to be scalable, secure, and cloud-ready, so they can grow alongside the business. From conception through UX and development to ongoing operations, we create software that solves real problems and delivers measurable value.
From the idea to the solution:
We deliver digital results from A to Z
For us, digital projects don’t end with the launch. We support companies over the long term—from strategy and UX design through development, hosting, and maintenance to automated scaling. Our clients achieve measurable results: improved performance, higher conversion rates, and significantly lower marketing costs. The projects below demonstrate how we turn digital ideas into real results.
Stash
Holistic tech stack for the Swiss quick-commerce provider. Development of the entire e- commerce platform with shopping app, pick/inventory app and delivery app. API-first architecture for maximum flexibility and scalability.
from order to delivery
in the App Store
Hidden Gyms
Development of a booking platform that allows users to book and pay for gym sessions and open doors directly in the app. Full service incl. software architecture, UX design consulting & React Native app development for iOS & Android.
Automated processes
Employee satisfaction
Globus Baumarkt
Relaunch of the Globus Baumarkt online shop incl. workshops, strategy and conversion consulting, migration from Shopware 5 to 6 as well as frontend and backend development.
Conversion Rate
Articles
MyHood
Conception, design and development of a community platform for car enthusiasts incl. UI/UX design, app development, community building, TecDoc integration and online marketing.
Reach
Users in 6 months
Stash
Holistic tech stack for the Swiss quick-commerce provider. Development of the entire e- commerce platform with shopping app, pick/inventory app and delivery app. API-first architecture for maximum flexibility and scalability.
from order to delivery
in the App Store
Hidden Gyms
Development of a booking platform that allows users to book and pay for gym sessions and open doors directly in the app. Full service incl. software architecture, UX design consulting & React Native app development for iOS & Android.
Automated processes
Employee satisfaction
Globus Baumarkt
Relaunch of the Globus Baumarkt online shop incl. workshops, strategy and conversion consulting, migration from Shopware 5 to 6 as well as frontend and backend development.
Conversion Rate
Articles
Rausch
Programming of a conversion-optimized B2C online shop based on Shopware, embedded in an individual shopping world, with a focus on emotional web design.
Somfy
Prototyping design sprint, UI/UX design, web development for the development of an interactive and intuitive smart home product configurator and storytelling of everyday situations.
deinSchrank.de
Website relaunch and optimization of the online shop by implementing a modular design system and product configurator for custom-made cabinets and shelves.
Conversion Rate
Wardrobe combinations
Paulmann
Development of an online configurator for a modular lighting/rail system including digital strategy, conception & wireframing, e-commerce design (UI/UX) and software development.
FWV
App development, portal and marketplace programming
Hidden Gyms
Development of a booking platform that allows users to book and pay for gym sessions and open doors directly in the app. Full service incl. software architecture, UX design consulting & React Native app development for iOS & Android.
Automated processes
Employee satisfaction
MyHood
Conception, design and development of a community platform for car enthusiasts incl. UI/UX design, app development, community building, TecDoc integration and online marketing.
Reach
Users in 6 months
Neumann
Strategic development of an entertainment and community platform incl. UI/UX screen design, brand community and online marketing. Implementation of an online & offline dealer finder.
evi.plus
E-health platform: Process digitization for communication between doctors/therapists,
laboratories and patients
Our approach
Successful digital products don’t happen by chance. Our process combines strategy, UX, design, development, and ongoing optimization. Through agile methods and close communication, projects remain transparent—with clear goals, deadlines, and measurable results.
- Initial consultation (15-30 min.)
- Follow-up appointment to coordinate the requirements (2 hours)
- Recommendation system architecture and ideal tech stack (1-2 days)
- Offer incl. project plan (2-3 days)
- Problem and product definition
- Market and competition research
- Idea generation and design thinking
- User research
- Business Model Canvas
- Definition of relevant function
- First technical evaluation
- Defining the overall product
- Customer journeys & processes
- Interaction design
- (Rapid) prototyping
- User research & tests
- Qualitative and quantitative validation
- Landing Page-Tests
- Business validation
- SCRUM management
- Product Security Design
- Deployment and test plan
- License management
- DevOps strategy
- Agile frontend and backend development
- Integration of interfaces (e.g. CRM, payment providers, tracking)
- Content maintenance (text, image, video, SEO)
- Setting up the server environments
- Manual and automated tests
- Functional tests (usability, responsiveness, loading times, forms, etc.)
- SEO and performance checks
- Implementation of analyses and BI
- Technical documentation
- Technical go-live (incl. backup, DNS, SSL etc.)
- Server monitoring & SLA
- Performance optimization
- Functional enhancements
- Conversion tracking & optimization
- Growth hacking (SEO, SEA, & social)
Technologies & Systems
Customized. Scalable. Future-proof.
Using modern technologies and scalable systems, we develop digital solutions that stand the test of time. Whether it’s Shopware stores, Shopify projects, headless architectures, cloud infrastructures, or custom interfaces—we rely on stable, secure, and future-proof technologies.
Our systems can be flexibly expanded, rolled out internationally, and seamlessly integrated with ERP, PIM, CRM, inventory management, or payment systems. This results in digital platforms that not only perform well today but will also remain scalable three years from now.
Figures & Facts
With over 1,000 completed projects and more than two decades of experience, we are one of the most experienced digital and e-commerce agencies in Berlin. Our clients benefit from an interdisciplinary team of developers, UX designers, and marketing experts.
23 years
E-commerce expertise in D2C, B2C and B2B e-commerce solutions with Shopware
1.000 projects
From web stores and product configurators to transactional commerce platforms including apps.
25 experts
Motivated professionals in the field of UX/UI
2 locations
Locations in Berlin & Heidelberg
ACID21 develops websites, e-commerce stores, mobile apps, and custom software—combined with UX design, hosting, support, and online marketing.
Our focus is on e-commerce, Shopware development, mobile apps, cloud infrastructure, automation, and data-driven marketing.
Yes. We develop custom plugins, interfaces, payment processes, product configurators, and automated workflows—all perfectly tailored to the online store.
We provide ongoing support for projects, including technical maintenance, updates, monitoring, hosting, security, conversion optimization, and further development.
Our team is based in Berlin, but we work throughout Germany and internationally. Many of our clients are based in Berlin, Brandenburg, and the DACH region.
After analysis and technical planning come UX design, development, testing, and launch. We then support companies with operations, marketing, and scalable further development.
Yes – we handle website relaunches, optimizations, load time improvements, conversion optimization, technical enhancements, and SEO measures.
Shopware, Shopify, AWS, headless systems, modern frameworks, API interfaces, databases, PWA technologies, and cloud solutions.
