See all servicesNext.js Development
Vlad Sedenko · Web Product Developer

Service / Independent specialist

Freelance Next.js Developer for SaaS Web Apps and Marketing Websites

I help startups, agencies, and B2B teams build production-ready Next.js websites, web apps, and CMS-driven marketing platforms with React, TypeScript, Sanity/Strapi, and Vercel.
  • Marketing websites, landing pages, and product pages in Next.js
  • SaaS dashboards, MVPs, and internal web applications
  • CMS integrations, forms, analytics, deployment, and support
  • Performance, Core Web Vitals, and SEO-ready technical structure
I work remotely with clients across Europe, the UK, the US, and Canada. My portfolio includes verifiable projects such as dr100 and GetInData, and for NDA projects I describe only the factual technical scope.
10+ years in web developmentPublic projects: dr100, GetInData
Based in the EU, working remotely worldwide
Available for new projects from January 2026
View casesEngagement modelsAbout VladSend brief
Get a quote for your project
Diagnostic infographic for Next.js Development: primary score and measurable service signals
Service diagnostic

/ Services

What you can hire me for

  • Next.js marketing website

  • SaaS dashboard / MVP frontend

  • CMS integration: Sanity / Strapi

  • Performance & technical SEO cleanup

  • Monthly support and maintenance

Marketing websites

B2B websites, landing pages, service pages, and product pages with clear structure, CMS, and SEO-ready metadata.

Web apps and MVPs

Portals, dashboards, SaaS interfaces, and MVPs with React, TypeScript, protected flows, and maintainable architecture.

CMS-driven platforms

Sanity or Strapi setups for teams that need to update content without developer help for every small change.

Performance and SEO fixes

Audits and improvements for speed, indexing, metadata, sitemap, canonical, schema, internal links, and Core Web Vitals.

/ Stack

Technologies and how I use them

01React02Next.js03Sanity04TypeScript05Stripe06Vercel

Next.js + React

SSR/SSG, App Router, interfaces, and production pages.

Sanity/Strapi

Editorial content, blog, landing pages, cases, and localization.

Stripe/Supabase/Firebase

Payments, auth, forms, data, and integrations when the project needs them.

TypeScript

Typed data contracts and fewer regressions as the product grows.

Cypress/Storybook

Checks for critical flows and stable UI components.

Vercel/Netlify

Deployment, preview environments, monitoring, and faster iteration.

10+ years in development

I have worked as a web developer since 2014, from freelance projects to product teams. My background can be checked through LinkedIn.

Dozens of tasks and projects

Contributed to dozens of website and web app projects across architecture, UI, frontend, CMS, optimization, and support since 2014.

Ongoing UX and SEO research

I regularly study SaaS, product, and marketing websites to improve structure, UX patterns, and conversion-focused implementation.

/ Engagement

Engagement models

Audit

Technical audit for Next.js, SEO, performance, CMS, and UX structure.

Fixed scope

Clear deliverables, estimate, timeline, and acceptance criteria.

Monthly support

Support, improvements, new pages, monitoring, and careful releases.

Consulting

Architecture support, technical review, migration planning, or project estimation.

/ Fit

Who This Is For

A good fit if

  • you need a Next.js website or web app that can grow after launch;

  • performance, SEO-ready structure, CMS, and team usability matter;

  • you need a developer who can work with design, business context, and code.

Not the right fit if

  • you need guaranteed Google rankings or instant traffic growth;

  • the project requires medical, financial, or legal advice instead of development;

  • there is no time for a brief, priorities, and result review before release.

/ Process

How I work

  1. Planning

    Scope, priorities, page map, user flows, CMS needs, integrations, and acceptance criteria. The output is a practical delivery plan, not a vague discovery document.

  2. Structure and UI

    Reusable sections, responsive layouts, accessibility basics, content states, and page patterns that can support new service pages, landing pages, or app flows later.

  3. Development

    Next.js + TypeScript, Sanity/Strapi CMS, protected admin routes, environment-based secrets, preview deployments on Vercel, handover notes for the team. Stack chosen per project.

  4. Optimization and release

    Metadata, sitemap, canonical, schema, redirects, image handling, caching, analytics events, form checks, and post-launch fixes for priority pages and flows.

10+

years in web development

120+

launched projects

24h

reply, EU-based

/ Projects

Selected Next.js Projects

Last updated: November 2025

Below are verifiable links and one NDA-style example. For dental/finance projects I describe only the technical role: frontend, CMS, performance, accessibility, testing, and deployment. This is not medical or financial advice.

dr100

Project: dr100

Role: Frontend Developer

Year: 2022-2023

Stack: Next.js, React, Tailwind CSS

Deliverables: marketing page, frontend for SaaS app, responsive UI, support for the marketing team.

Public link: https://dr100.pl/

GetInData

Project: GetInData website

Role: Frontend Developer

Year: 2019-2020

Stack: React, Gatsby.js, GraphQL, Netlify

Deliverables: company website, SEO-oriented page structure, performance improvements, marketing implementation.

Public link: https://getindata.com/

NDA finance subscription app

Project: NDA finance subscription management app

Role: Frontend / Full-stack Developer

Year: NDA

Stack: Next.js, React, TypeScript, tRPC, Prisma, shadcn/ui

Deliverables: frontend architecture, data handling, UX for reducing manual input errors, e2e testing, accessible UI.

Public link: Not public due to NDA.

/ Resources

Related resources

/ FAQ

FAQ

Can you be hired only for an audit?

Yes. I can review a Next.js project, identify technical risks, and prepare a prioritized improvement plan.

Do you work with agencies?

Yes. I usually join as a frontend/Next.js developer for production tasks, CMS integrations, performance, and release support.

What do you need for an estimate?

A short brief, links to design or the current site, must-have features, timeline, stack constraints, and expected engagement model.

Send a project brief

Describe the project, current problem, or estimation task. I will reply with clarifying questions, suggest the next step, and recommend a suitable engagement model.

Email:

vlad@sedenko.net

  • the website or app you want to build or improve;
  • links to design, current URL, or repository when possible;
  • rough timeline, priorities, and expected cooperation format.

I reply within 24 hours. You'll talk to me directly, not a sales team.

Frequently asked questions

Can you be hired only for an audit?

Yes. I can review a Next.js project, identify technical risks, and prepare a prioritized improvement plan.

Do you work with agencies?

Yes. I usually join as a frontend/Next.js developer for production tasks, CMS integrations, performance, and release support.

What do you need for an estimate?

A short brief, links to design or the current site, must-have features, timeline, stack constraints, and expected engagement model.

Related / Services

Related services

See all services
01

SaaS Development

SaaS and web application development for founders and small businesses: architecture, accounts and roles, Stripe subscriptions, dashboards, admin panels and client portals — built by one senior developer, from MVP to a product that scales.

SaaS Development →02

Speed Optimization

Website speed and Core Web Vitals optimization: measured performance work that makes your site load fast, pass Google's metrics and convert better.

Speed Optimization →03

React Development

Looking for a skilled React developer? With over 10 years of experience in React, JavaScript and web development, I deliver high-quality solutions for businesses worldwide.

React Development →