System design, technology selection, and scalability planning for new projects or system modernization.
Guidance on framework selection, tooling choices, and technology adoption based on team capabilities and project requirements.
Code review processes, engineering standards documentation, and knowledge transfer to elevate team performance.
In-depth evaluations of your codebase, architecture, and engineering practices. We identify technical debt, performance bottlenecks, and security risks with prioritized recommendations for improvement.
Deep analysis of system architecture, design patterns, and code quality. We evaluate scalability, maintainability, and adherence to best practices across your entire stack.
Comprehensive performance testing and reliability assessment. We analyze load capacity, response times, and system behavior under stress with concrete optimization strategies.
Security vulnerability scanning, authentication review, and compliance gap analysis. We provide a prioritized security roadmap based on risk assessment.
Evaluation of CI/CD pipelines, testing strategies, and team workflows. We recommend improvements to increase deployment frequency and reduce time to market.
Technical SEO implementation and content strategies that drive organic traffic growth. We focus on sustainable, white-hat techniques with measurable results.
Comprehensive site analysis covering crawlability, indexation, site speed, and technical optimization. Includes implementation support for recommended fixes.
Keyword research, content gap analysis, and editorial planning. We help develop content that ranks while serving user intent and business objectives.
Optimization strategies for businesses targeting multiple markets and regions. We understand international SEO, multilingual content strategy, and cross-border digital marketing.
Custom web application development using modern JavaScript frameworks and cloud infrastructure. We build production-ready systems with clean, maintainable code.
End-to-end development of web applications using Node.js/Deno backends and React/Preact frontends. We specialize in building scalable, performant systems deployed on AWS.
Rapid development of minimum viable products with focus on core functionality and time-to-market. We help startups validate ideas quickly without sacrificing code quality.
Strategic migration of legacy applications to modern stacks. We minimize risk through incremental refactoring while maintaining business continuity.
Targeted optimization of existing applications to improve speed, reduce costs, and enhance user experience.
We work with early-stage startups building MVPs, growing SMEs scaling their systems, and established enterprises modernizing legacy applications. Our clients span SaaS, e-commerce, fintech, and digital services across Europe.
Yes, we work with clients worldwide. Based in Barcelona, we're well-positioned for collaboration across multiple time zones and have experience working with distributed international teams.
We offer project-based engagements for defined scope work (like technical assessments or MVP development) and ongoing retainer arrangements for continuous consulting and development support. Initial engagements typically start with a discovery phase to properly scope the work.
Absolutely. We frequently collaborate with in-house teams, providing architecture guidance, code reviews, and mentorship. Knowledge transfer is a core part of our approach—we want your team to be self-sufficient after our engagement.
We've worked across SaaS platforms, e-commerce systems, educational technology, and digital services. Our focus is on technical excellence rather than industry-specific knowledge, though we quickly ramp up on domain-specific requirements.
Yes, we offer maintenance retainers for applications we've built. For legacy system modernization projects, we typically recommend a support period post-launch to ensure smooth operation.
Schedule a consultation to explore how zx web can help with your development challenges, architecture decisions, or system optimization needs.