I plan, design, build and optimise Next.js web applications and websites

Vlad Sedenko - WEB Developer
Your Partner in Building Fast, Modern & Composable Marketing Websites & Web apps
LinkedInSince discovering Next.js, it has become my go-to framework for building fast, scalable, and modern web applications. I see it as one of the most powerful tools in the current web development landscape, and have focused my expertise around delivering high-quality solutions using Next.js.
As an experienced freelance remote developer, I’ve worked with clients across the UK, USA, Canada, and Europe — trusted by agencies and businesses to turn their ideas and designs into fully functional, performant websites. I handle every aspect of the development process, from architecture to deployment, with a focus on efficiency, user experience, and long-term maintainability.












Planning
- Research
- Strategy
- Roadmap

Before writing any code, I start with understanding the context: why the website / web app is needed, what problems it should solve today, and where it needs to grow tomorrow. Many clients come to me knowing they want to use Next.js — it's fast, modern, SEO-friendly — but the project itself still feels abstract.
At this stage, I help structure the idea:
- We define what’s essential for the first release, and what can be postponed
- I explain where we can simplify and reuse components — and where shortcuts will hurt in the long run
- I design for growth: from filters and integrations to roles and custom dashboards
I’m not just listing features — I look at the project as a whole. I show where you can go lean, and where it’s smarter to build for the long term. This isn’t about making things slow or expensive — it’s about making smart decisions early that save you time and money later.
Designing
- Prototype
- Architecture
- UX / UI
- Responsive Design

If the structure isn’t thought through from the start, the site becomes hard to grow. New pages don’t fit, design breaks down, logic gets messy. That’s why I approach design as system architecture — not just visuals.
I start with prototyping: simple wireframes to test how users will move through the site and reach their goals. I don’t aim for “pretty” — I focus on clarity, structure, and making sure the important things are obvious right away.
- Designing clear page structure and reusable components
- Planning for growth: filters, user roles, languages, new sections
- Building with accessibility, responsiveness, and readability in mind
- Treating UI/UX as a system, not a collection of screens
To me, design is about simplifying complexity. The cleaner the project is at this stage — the fewer issues we’ll face later.
I've been working as a web developer since 2014 — from freelance gigs to collaborative product teams. I deliver clean, efficient solutions with a growth mindset.
Contributed to over 150 projects at various stages — from initial architecture and UI planning to final optimization and maintenance.
I've analyzed and studied thousands of websites. This visual exposure gave me a sharp sense of what works — and what absolutely doesn't.
Developing
- Architecture
- Development
- Testing
- Deployment
- Maintenance

Writing code is only part of the job — the result also needs to be easy to use and maintain. Too often, I see sites where changing a headline requires editing the code, and the CMS feels like a developer-only tool.
I set up content management systems that are intuitive, secure, and tailored to your team — so you don’t need to call a developer every time you want to update something.
- Implementing flexible, user-friendly CMS (usually Sanity or Strapi)
- Empowering non-developers to manage content safely and easily
- Focusing on security — protecting APIs, admin areas, and sensitive data
- Integrating analytics, forms, marketing tools, and external services
- Writing clean, scalable Next.js code built for long-term stability
I don’t just make things “work” — I make sure your platform can grow without becoming a constant maintenance headache.
Optimizing
- Performance
- Costs
- Security
- SEO
- UX
- Monitoring

Once a site is live, it still needs to be fast, visible, and cost-effective — otherwise it won’t deliver results. I've seen projects where everything looks good, but:
- The pages load slowly and users bounce
- Google can’t properly index the content
- Server costs keep growing with little return
This stage is where I make sure the site performs — technically and in terms of business goals.
- Improving loading speed with SSR, SSG, caching, and smart asset handling
- Full SEO pass: meta, structure, accessibility, sitemap, schema
- Deploying on modern infrastructure (Vercel, Netlify) to reduce costs and downtime
- Tracking real user behavior and performance (Core Web Vitals, analytics, heatmaps)
Optimization isn’t about tweaks — it’s about making sure your site reaches people, loads instantly, and supports your growth without burning your budget.
Selected projects

web application + website
dr100
Developed the marketing page for a SaaS solution aimed at dental clinics, collaborating closely with designers and marketers. Additionally, I contributed as a front-end developer to the application's development. (HTML, CSS, JavaScript, Next.js, React, Tailwind CSS)
Link
Website
GetInData
Developed big data company website from scratch with SEO and marketing improvements which brought a lot of traffic to the site and increased user retention (React, Gatsby.js, GraphQL, Netlify)
Link
web application
CRM for Financial Subscription Management
Redesigned and rebuilt a finance subscription management web application from scratch, focusing on performance, scalability, and usability; planned architecture, optimized data handling, minimized manual input errors, implemented full end-to-end test coverage, and built a cohesive, accessible UI (Next.js, React, TypeScript, tRPC, Prisma, shadcn/ui).
"Vlad is an exceptional developer who delivered our Next.js project on time and with excellent quality. His expertise in performance optimization made a significant difference."
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"Working with Vlad was a great experience. He helped us quickly build an MVP prototype with a solid architecture that we could easily scale and iterate on to test our ideas fast."
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Have a project in mind?
Let's discuss how I can help you build and optimize your Next.js website.