I will be your senior full stack web developer for front end and back end work

M
marians302
M
marians302
Marian S

Vetted Pro

Level 2

be your senior full stack web developer for front end and back end work
Full Screen
be your senior full stack web developer for front end and back end work
Vetted by Fiverr Pro

Marian S was selected by the Fiverr Pro team for their expertise.

About this gig

You need a senior developer who can take a task from design to production, without hand-holding.


Front end, back end, database, deployment. One person, accountable for all of it.


WHAT I DO

- New features and modules, end to end

- Redesigns of existing web apps and sites

- Building from Figma, Canva or any design tool you use

- APIs, integrations and database work

- Fixes, refactors and performance work


STACK

JavaScript and TypeScript, Node.js, Angular, Firebase, REST APIs, Stripe and AI APIs. Everything custom-coded.


HOW I WORK

Senior judgment, AI agents for speed. I understand every line I ship, and you get clear updates without chasing.


WHY ME

- 15 years of engineering, 250+ clients since 2014, rated 4.93

- Fractional CTO and lead software engineer for a private aviation company, 2022-2026

- US clients since 2014, US hours are no problem


Need ongoing work? Subscribe monthly and keep a senior developer on your team.


Tell me what you need built and what it's built with now. I'll tell you how many hours it really takes.

  • Website type

    • Business

  • Programming language

    • HTML & CSS
    • JavaScript
    • TypeScript
    • Bootstrap
    • jQuery

  • Website features

    • Marketing
    • Payment
    • Forum
    • Social media
    • Customer support
    • Shipping
    • Inventory
    • Analytics
    • Video
    • Landing page
Respect third-party rights

Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.

Get to know Marian S

Marian S

Vetted Pro

AI Tools, Fractional CTO, Web Apps, Ecommerce, Senior Software Engineer

5.0(7)

Level 2

Marian S is part of the Fiverr Pro catalog and has been hand-picked by a dedicated Fiverr Pro team for their skills and expertise.

Vetted for

  • Website Development

  • Website Maintenance

  • FromRomania
  • Member sinceNov 2021
  • Avg. response time1 hour
  • Last delivery3 months

  • Languages

    English, Romanian, Croatian, German
Hi, I'm Marian. Senior software engineer and technical partner. I build AI tools, web apps, premium websites and Shopify stores that hold up. One of the most successful freelancers since 2014. 250+ clients, rated 4.93, trusted by US businesses. - Fractional CTO and lead software engineer for a private aviation company (2022-2026) and a US marketplace (since 2026) - Technical partner to a Shopify Plus brand past $10M in sales - Built SelfManager.ai, my own AI SaaS: 400k+ lines, 14 AI features, MCP server, API & Webhooks What are you building?

My Portfolio

Other Website Development Services I Offer

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