Speed uplift
99%+
I optimized heavy flows from minutes down to seconds for production teams.
Full-Stack Developer
Hi, I'm Paolo Kos.
I build reliable full-stack web applications with Angular or Next.js, and Node.js. I work on e-commerce and custom business platforms with a focus on clean architecture, performance, and long-term maintainability. With 4+ years of professional experience, I focus on speed, reliability, and maintainable architecture.
4+ Years ExperienceAngular / Next.js + Node.jsPerformance Focused
Impact
Proven results
Numbers from production projects where performance, reliability, and business outcomes all matter.
Daily users
1000+
Products I maintain handle thousands of active users each day.
Payment reliability
24/7
I build and monitor stable payment flows with real-world transaction volume.
Years shipping
4+
Professional full-stack delivery from discovery through launch and iteration.
Proof
Client success stories
Feedback from clients across Upwork and direct project work.
Franko K.
Upwork
Nov 21, 2025
Paolo delivered exactly what I needed, in an extremely short timeframe. The communication was very easy, and there were no problems with the result delivery.
Noel O.
Direct client message
Mar 24, 2026
Paolo created a website for me that was fully tailored to my needs and requirements. Throughout the process, we stayed in close contact, and he was always available, responsive, and very kind. Even the small details I wanted changed were updated exactly as requested and in the shortest possible time. The website works flawlessly, and I am very satisfied with the result. If I need any changes or updates in the future, I will definitely contact Paolo again.
Selected
My work
Noel Okanović Coaching
A fully production-ready bilingual (HR/EN) Next.js landing page for personal trainer Noel Okanović, featuring SEO optimization, responsive UX, Motion animations, currently awaiting final domain assignment after client licensing.
View Project
Kos obrt
Bilingual, high-performance landing page for KOS Obrt, tailored for a client acquisition in Labin and surrounding areas.
View Project
Tip-Top Labin
Built multilingual cleaning business website with Sanity CMS, dynamic services, and gallery showcase.
View Project
RukaZaRuku
Community-driven platform that enables people to exchange services using in-app tokens or direct barter.
View Project
Services
What I do
01
Web development
I build fast, responsive websites and web apps with Angular, Next.js, React, Node.js, Express, and CMS platforms such as Sanity. From landing pages to full product systems, I focus on stable architecture and production-ready delivery.
02
Web design
I design modern, conversion-focused interfaces in Figma and implement them with clean, consistent frontend systems that work across mobile and desktop.
03
SEO
I improve organic visibility with technical SEO, content structure, and performance optimization so your pages rank better and attract high-intent traffic.
04
Support & maintenance
I handle updates, monitoring, and reliability with CI/CD pipelines (GitHub Actions), Dockerized deployments, and structured testing workflows. Your site stays secure, fast, and maintainable while your team focuses on growth.
Stack
Technologies I use
Tools I rely on to build fast, stable, and scalable products across frontend, backend, and data.
Support
Frequently Asked Questions
Quick answers on process, pricing, and support.
01How long does a typical project take?
01
How long does a typical project take?
Project timelines vary depending on complexity and scope. A simple landing page typically takes 1-2 weeks, while a full web application can take 4-12 weeks. I provide detailed timelines after understanding your specific requirements and will keep you updated throughout the development process.
02What's your pricing structure?
02
What's your pricing structure?
I offer flexible pricing based on project scope and requirements. For fixed-price projects, I provide detailed quotes after discussing your needs. For ongoing work, I offer hourly rates. Contact me with your project details, and I'll provide a customized estimate that fits your budget.
03How do you handle revisions?
03
How do you handle revisions?
I include a reasonable number of revision rounds in all project quotes to ensure you're completely satisfied with the final result. Additional revisions beyond the initial scope can be discussed and accommodated. My goal is to deliver exactly what you envision.
04What's included in your services?
04
What's included in your services?
My services include full-stack web development, responsive design, SEO optimization, testing, deployment, and documentation. I also provide ongoing support and maintenance options. Each project is tailored to your specific needs, and I'll clearly outline what's included in your project proposal.
05How do you communicate during projects?
05
How do you communicate during projects?
I maintain clear and consistent communication throughout the project. I provide regular updates on progress, respond to messages within 24 hours, and am available for scheduled calls or video meetings when needed. You'll always know the status of your project.
06Do you provide ongoing support?
06
Do you provide ongoing support?
Yes, I offer ongoing support and maintenance packages to keep your website running smoothly. This includes security updates, bug fixes, performance monitoring, and feature additions. I can customize a support plan that fits your needs and budget.
07What technologies do you work with?
07
What technologies do you work with?
I specialize in modern web technologies including React, Next.js, Angular, Node.js, Express.js, MongoDB, and more. I use the MEAN stack (MongoDB, Express.js, Angular, Node.js) professionally at my work. I stay current with industry best practices and can recommend the best technology stack for your specific project needs.
Contact
Let's Build Something Strong
Share your project goals and timeline. I'll reply with clear next steps, scope direction, and practical implementation options.
Insights
Latest Blog Posts
Notes from real projects: performance, architecture, UI decisions, and practical implementation lessons.
How I use AI as my "Senior Developer"
I use AI like a senior developer - planning, reviewing, debugging, and refactoring with it. Less typing, more thinking, and better code as a result.
4 min read
My First Impressions of NestJS (And Why It Clicked Fast)
My first impressions of NestJS: a structured, TypeScript-first backend framework that finally made architecture feel clean instead of improvised on top of Express.
3 min read
The Illusion of the “Right” Framework
Chasing the “right” framework keeps you at tutorial level in five tools. Pick one stack, go deep, and build fundamentals, debugging, and finishing skills - those outlive every trend.
5 min read