ZTABS delivers professional legacy app modernization for Seattle businesses — including incremental modernization, business logic preservation, data migration. Serving Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning companies in Seattle, WA.

ZTABS provides legacy app modernization services in Seattle, WA — including incremental modernization, business logic preservation, data migration, and more. We work with Seattle businesses across Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning 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 Seattle's Cloud Computing and E-commerce & Retail Tech 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 Seattle stakeholder reviews. See our full process →
Seattle (home to tech giants and a thriving startup ecosystem, population 740,000) is home to thriving Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning sectors — each with distinctlegacy app modernization needs. Seattle companies build at scale — this is the city where AWS was born. Businesses here need cloud-native architectures, microservices, and systems that handle billions of requests. The gaming industry needs real-time multiplayer infrastructure. E-commerce companies need platforms that can handle Prime Day-level traffic spikes.
Seattle is home to Amazon, Microsoft, and the headquarters of some of the world's most influential tech companies. The city's engineering talent is among the best in the world, and its cloud computing expertise (AWS, Azure) is unmatched. The startup ecosystem benefits from deep technical talent and enterprise connections.
No state income tax, the highest concentration of software engineers per capita in the US, and direct connections to the world's largest cloud platforms. UW's computer science program consistently ranks in the top 10 nationally.
Each of Seattle's core sectors has specific legacy app modernization requirements. We build solutions tailored to these industry needs:
We work with Seattle's cloud computing companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how cloud computing operates in Washington.
We work with Seattle's e-commerce & retail tech companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how e-commerce & retail tech operates in Washington.
Legacy App Modernization for E-commerce →We work with Seattle's ai & machine learning companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how ai & machine learning operates in Washington.
We work with Seattle's gaming companies on custom legacy app modernization — from regulatory compliance to workflow automation and data integration tailored to how gaming operates in Washington.
Our distributed engineering team delivers the same quality and responsiveness as a local partner. No state income tax, the highest concentration of software engineers per capita in the US, and direct connections to the world's largest cloud platforms. UW's computer science program consistently ranks in the top 10 nationally.
Seattle moves fast — so do we. Our legacy app modernization sprints, standups, and code reviews are scheduled within Pacific Time (PT) business hours. Same-day feedback loops mean your team never waits for offshore handoffs.
Seattle's tech ecosystem is competitive — our dedicated project lead brings the same senior-level rigor your team expects. They manage your backlog, anticipate technical debt, and ensure every sprint delivers shippable features that move your metrics.
Every Seattle 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 Seattle's core industries — Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning — and understand the compliance, integration, and performance requirements each sector demands. We optimize for conversion with sub-2-second page loads and mobile-first checkout flows.
740,000
City Population
4
Key Industries
Pacific Time
Time Zone
Common questions about legacy app modernization for Seattle businesses
We offer end-to-end legacy app modernization for Seattle 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 Seattle's key industries — Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning.
ZTABS delivers professional legacy app modernization for Houston businesses — including incremental modernization, business logic preservation, data migration. Serving Energy & Oil/Gas, Healthcare & Biotech, Aerospace & Defense companies in Houston, TX.
Legacy App Modernization in New York, NYZTABS delivers professional legacy app modernization for New York businesses — including incremental modernization, business logic preservation, data migration. Serving Finance & Fintech, Media & Advertising, Fashion & Retail companies in New York, NY.
Legacy App Modernization in Los Angeles, CAZTABS delivers professional legacy app modernization for Los Angeles businesses — including incremental modernization, business logic preservation, data migration. Serving Entertainment & Media, E-commerce & DTC Brands, Gaming & AR/VR companies in Los Angeles, CA.
Web Development in Seattle, WAZTABS delivers professional web development for Seattle businesses — including full-stack development, progressive web apps, api development. Serving Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning companies in Seattle, WA.
Web Design in Seattle, WAZTABS delivers professional web design for Seattle businesses — including ui/ux design, responsive design, custom interfaces. Serving Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning companies in Seattle, WA.
AI Development in Seattle, WAZTABS delivers professional ai development for Seattle businesses — including llm integration & fine-tuning, ai agents & automation, rag & knowledge systems. Serving Cloud Computing, E-commerce & Retail Tech, AI & Machine Learning companies in Seattle, WA.
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 Seattle. Get a free consultation today.