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.
See all servicesNext.js Development
Vlad Sedenko · Web Product DeveloperService / 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
Get a quote for your projectBased in the EU, working remotely worldwide
Available for new projects from January 2026
/ Services
What you can hire me for
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Next.js marketing website
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SaaS dashboard / MVP frontend
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CMS integration: Sanity / Strapi
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Performance & technical SEO cleanup
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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
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.
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
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you need a Next.js website or web app that can grow after launch;
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performance, SEO-ready structure, CMS, and team usability matter;
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you need a developer who can work with design, business context, and code.
Not the right fit if
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you need guaranteed Google rankings or instant traffic growth;
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the project requires medical, financial, or legal advice instead of development;
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there is no time for a brief, priorities, and result review before release.
/ Process
How I work
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.
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.
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.
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.
/ 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.
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.
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