Frontend Modernization Companies

AngularJS to React migration guidance and component scaffolding

Conditional Access policy JSON and PowerShell migration script generation

Automated JavaScript/TypeScript codemod transforms

Automated Next.js version upgrade transformations

Warsaw-based AI-focused software house founded in 2009 with 49 engineers delivering full-stack solutions to fintech, blockchain, and enterprise clients. 95 projects completed across 18 countries; ~90% of client reviews highlight on-time delivery, strong project management, and technical depth.

Accenture is a global professional services powerhouse with deep expertise in mainframe modernization. They combine strategic consulting with massive execution scale, leveraging partnerships with all major cloud providers. Their "myNav" platform helps chart the best migration path.

Brainhub, founded in 2015 in Gliwice, Poland, is a 500-person software engineering agency part of the STX Next group. Specializes in AI/ML and software modernization. Recognized by Deloitte Technology Fast 50; 4.9/5 Clutch rating from 42 reviews. Typical rates: $50-99/hr.

Braintrust is a user-owned talent network that connects enterprises with top technical talent. They specialize in modern tech stacks including React, Next.js, and Web3.

Codurance is a software consultancy focused on software craftsmanship, TDD, and clean architecture. They specialize in modernizing legacy systems with a focus on quality and maintainability.

Cognizant is ranked #1 in Application Modernization by HFS. Their "Skygrade" platform acts as a force-multiplier, utilizing generative AI and modern tooling to accelerate holistic cloud-native transformations, particularly in banking and healthcare.

EPAM is known for its high-end software engineering capabilities. They don't just "migrate" code; they re-engineer it into modern, scalable digital products. Their "SAMP" platform accelerates modernization while maintaining high code quality standards.

Globant focuses on "Reinventing businesses." They heavily utilize AI (Augmented Coding) to accelerate the understanding and refactoring of legacy code. They are an excellent choice for modernizations that are driven by a need to improve customer experience (CX).

Grid Dynamics specializes in enterprise-level digital transformation, with a heavy focus on Retail and CPG sectors. They excel at modernizing monolithic commerce platforms into microservices-based cloud architectures.

Mobilize.Net is the undisputed leader in Windows-legacy modernization. Their tools (VBUC, WebMAP) are the industry standard for migrating Visual Basic 6 (VB6), PowerBuilder, and Silverlight applications to modern .NET, Angular, and Azure Web Apps.

PITSS is a specialist in Oracle Forms modernization. Their proprietary tools automate the analysis and migration of Oracle Forms and Reports to modern technologies like Java, React, and APEX, significantly reducing the risk and cost of manual rewrites.

Slalom focuses on a "strategy-first" approach. They are excellent at aligning the business case for modernization with the technical execution. They have deep partnerships with AWS, Azure, and Google Cloud.

SoftServe combines deep engineering expertise with strong industry verticals, particularly in Healthcare and Retail. Their Application Modernization Platform (SAMP) provides a repeatable framework for moving to AWS and Azure.

TestPros provides independent IT assessment and testing services, specializing in test automation for large-scale modernization projects in regulated industries.

Thoughtworks pioneered many of the patterns used in modern software development, including the "Strangler Fig" pattern for legacy modernization. They are the premium choice for complex, strategic re-architecting where code quality and domain alignment are paramount.

Toptal is a network of the top 3% of freelance software developers, designers, and finance experts. They provide on-demand senior talent for frontend modernization projects.