ZTABS delivers professional legacy app modernization for Berlin businesses — including incremental modernization, business logic preservation, data migration. Serving FinTech, E-commerce, Mobility companies in Berlin, Germany.

ZTABS provides legacy app modernization services in Berlin, Germany — including incremental modernization, business logic preservation, data migration, and more. We work with Berlin businesses across FinTech, E-commerce, Mobility using technologies like Next.js, React, Node.js.Get a free consultation →
Our legacy app modernization team delivers a full range of capabilities tailored to Berlin's FinTech and E-commerce sectors:
Modernize one module at a time — reducing risk, delivering value early, and keeping the business running throughout.
We extract and document the business rules embedded in legacy code so nothing gets lost in the new system.
Migrate from legacy databases (Access, FoxPro, SQL Server) to modern PostgreSQL or cloud-managed databases.
Build modern REST or GraphQL APIs that let the new system talk to legacy components during the transition period.
Create comprehensive test suites that verify the new system behaves identically to the old one for every critical workflow.
Deploy the modernized application on AWS, Azure, or Vercel with CI/CD pipelines, monitoring, and auto-scaling.
Each phase includes clear deliverables and Berlin stakeholder reviews. See our full process →
Berlin (the startup capital of Europe, population 3.7 million) is home to thriving FinTech, E-commerce, Mobility sectors — each with distinctlegacy app modernization needs. Fintechs need regulatory-compliant banking and payment platforms for European markets. E-commerce companies require marketplace infrastructure and logistics software. Mobility startups need fleet management, routing, and platform technology. SaaS businesses need scalable B2B platforms with EU data residency and GDPR compliance.
Berlin has earned its reputation as Europe's startup capital, with the highest concentration of startups on the continent. The city attracts founders and talent with its creative culture, relatively low costs, and thriving ecosystem in fintech, e-commerce, mobility, and SaaS. Companies like Zalando, N26, and Delivery Hero started here.
Lower costs than London or Munich with comparable talent. Strong engineering culture and design-focused startup scene. EU market access with Germany's economic stability. Government support for startups and immigration programs for tech talent. Excellent quality of life attracts founders and engineers.
Each of Berlin's core sectors has specific legacy app modernization requirements. We build solutions tailored to these industry needs:
We work with Berlin's fintech companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how fintech operates in Germany.
Legacy App Modernization for FinTech →We work with Berlin's e-commerce companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how e-commerce operates in Germany.
Legacy App Modernization for E-commerce →We work with Berlin's mobility companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how mobility operates in Germany.
We work with Berlin's saas companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how saas operates in Germany.
Our distributed engineering team delivers the same quality and responsiveness as a local partner. Lower costs than London or Munich with comparable talent. Strong engineering culture and design-focused startup scene. EU market access with Germany's economic stability. Government support for startups and immigration programs for tech talent. Excellent quality of life attracts founders and engineers.
Our legacy app modernization team aligns sprints, standups, and code reviews to Berlin's Central European Time (CET) business hours. We schedule overlap windows so your team gets same-day responses and real-time collaboration across time zones.
A senior legacy app modernization project lead manages your engagement end-to-end. They understand Berlin's business landscape and FinTech sector requirements, own your backlog, and ensure every two-week sprint delivers working features against your commercial goals.
Every Berlin client gets daily async updates on legacy app modernization milestones, weekly demos of working features, and shared project boards. We prioritize overcommunication so your team always knows the status, blockers, and what ships next.
We have delivered legacy app modernization for Berlin's core industries — FinTech, E-commerce, Mobility — and understand the compliance, integration, and performance requirements each sector demands. PCI DSS and SOC 2-ready infrastructure is built into every financial services project.
3.7 million
City Population
4
Key Industries
Central European Time
Time Zone
Common questions about legacy app modernization for Berlin businesses
We offer end-to-end legacy app modernization for Berlin businesses: incremental modernization, business logic preservation, data migration, api layer design. We use technologies like Next.js, React, Node.js to build solutions tailored to Berlin's key industries — FinTech, E-commerce, Mobility.
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Legacy App ModernizationLearn more about our legacy app modernization services nationwide.
Next.jsNext.js transforms web applications into high-performance, SEO-friendly platforms that drive user engagement and boost conversion rates. Leverage its capabilities to streamline your development process and accelerate time-to-market, ensuring your business stays ahead of the competition.
ReactHarness the power of React to accelerate your development process, enhance user experiences, and drive ROI. With its component-based architecture, React allows businesses to build dynamic applications that are both scalable and maintainable, ensuring long-term success in a competitive landscape.
Partner with ZTABS for expert legacy app modernization in Berlin. Get a free consultation today.