Custom Web Development Agency
Devs & Logics is a US web development agency building marketing sites, SaaS dashboards, and B2B platforms with Next.js, React, and Node.js—optimized for SEO, Core Web Vitals, and long-term maintainability.
The problem we solve
Slow WordPress sites, legacy SPAs, or offshore builds without SEO discipline hurt conversion and fundraising. You need a partner who ships fast, indexable, production-grade web apps—not page builders.
What we deliver
From high-converting marketing sites to multi-tenant SaaS dashboards, we deliver full-stack web products for US startups and enterprises—with clear APIs, accessible UI, and deployment pipelines your team can own.
- Marketing sites and product web apps
- Next.js 15 and React 19
- Headless CMS integration
- SEO and Core Web Vitals focus
- API design and third-party integrations
- Responsive UI with Tailwind CSS
Our process
- 1
Requirements & IA
User journeys, content structure, and technical requirements—CMS, auth, or integrations mapped upfront.
- 2
UI & component system
Responsive layouts with Tailwind and accessible components; headless CMS when marketing needs edit control.
- 3
Full-stack implementation
Next.js app router, API routes or Node services, database design, and third-party integrations.
- 4
SEO & performance QA
Metadata, schema, Lighthouse targets, and staged rollout to Vercel or AWS.
Proof & outcomes
- NYC fintech B2B SaaS web platform with role-based dashboards and Stripe billing
- San Francisco AI-native SaaS built on Next.js with structured data and fast LCP
- SEO-ready Next.js builds with JSON-LD schema and Core Web Vitals tuning
Technologies
Related articles
Frequently asked questions
What is the difference between a website and a web application?
A marketing website focuses on content and conversion; a web application includes authenticated users, databases, and business logic. We build both—often starting with a site and growing into a SaaS platform on the same stack.
Do you build SEO-friendly websites?
Yes. We use Next.js for server rendering, semantic HTML, meta tags, JSON-LD schema, and performance tuning so pages rank and load fast—see https://devsandlogics.com/locations for geo-targeted examples.
Can you migrate our existing site to Next.js?
We assess your current CMS, URLs, and integrations, then plan a phased migration with redirects and analytics continuity so SEO equity is preserved.
Areas we serve
8 US markets — explore local pages:
Discuss your Web Development project
Share your goals and timeline. We will propose a clear MVP or build plan.
Contact us