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You will get A scalable, secure cloud-based web app tailored to your needs
Top Rated
Project details
With extensive experience in developing cloud-based web solutions, I specialize in delivering scalable, secure, and efficient web applications tailored to your specific needs.
I focus on leveraging cutting-edge technologies such as AWS, React, Node.js, and modern DevOps practices to provide seamless, high-performing software.
My approach is client-centric, with clear communication and continuous collaboration throughout the project.
Expect high-quality code, efficient architecture, and reliable systems that will scale as your business grows.
I focus on leveraging cutting-edge technologies such as AWS, React, Node.js, and modern DevOps practices to provide seamless, high-performing software.
My approach is client-centric, with clear communication and continuous collaboration throughout the project.
Expect high-quality code, efficient architecture, and reliable systems that will scale as your business grows.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$2,100
|
Standard
$5,000
|
Advanced
$8,000
|
|---|---|---|---|
| Delivery Time | 21 days | 45 days | 70 days |
Number of Revisions | 1 | 2 | 5 |
Number of Pages | 3 | 6 | 12 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$500 - $1,250
Additional Revision
+$200Frequently asked questions
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FM
Fer M.
Mar 17, 2026
Technical Project Manager / Lead Developer (Next.js, APIs, Postgres)
Ognjen demonstrates strong technical and organizational skills and quickly adapted to the project environment. In his role as Lead Developer, he effectively coordinates the freelance team while remaining hands-on with development when needed. His expertise in Node.js, Next.js, RESTful architecture, and Postgres aligns well with the technical requirements of our SaaS platform. Communication is clear, progress is consistent, and his approach is highly accountable. Ognjen brings both leadership and practical problem-solving to the project, and his contribution has been valuable in keeping development structured and on track. I would gladly continue working with him.
EN
Evan N.
Jan 15, 2026
💻 Full-Stack Developer (Next.js + Node.js + Supabase) for Modern SaaS Platform
Ognjen’s backend development abilities are excellent. He’s extremely strong at understanding complex concepts and implementing them cleanly within the correct architecture for full-stack applications. His communication is clear, he thinks critically about solutions, and he consistently delivers high-quality work. I’d absolutely work with him again.
TK
Tural K.
Dec 2, 2025
Senior Fintech Developer — Striga Wallet, Card, and On/Off-Ramp API Integration (Individuals Only)
BB
Brendan B.
Aug 19, 2025
Senior Fullstack Engineer (React / Node.js) - Elite Remote Software Firm
Assessment completed quickly and efficiently!
About Ognjen
Lead / Senior Software Engineer | Solution Architect
100%
Job Success
Belgrade, Serbia - 2:21 am local time
Ex - Lead Software Engineer L2 @ FINcredible GmbH
Master's in Computer Software Engineering
PhD candidate in Computer Software Engineering (ongoing)
Senior Software Engineer with over 8+ years of experience, I specialize in architecting high-performance, scalable systems for the fintech, AI sectors and others. I lead projects from concept to launch, building robust, cloud-native, microservice or monolith based applications with TypeScript, Node.js, and React ecosystem.
If you are looking for a developer who just checks boxes, I’m not your guy. I build systems that actually solve the chaos of complex operations. Whether you are scaling a Fintech platform to millions of users or building AI-driven ETL pipelines, I don't just write code—I architect and deliver complete, scalable systems.
I have a proven track record of delivering critical business value:
- Cut data ingestion time by 85-90% for large-scale enterprise batch operations.
- Architected systems to handle millions of monthly users with high availability.
- Led development of a core fintech platform integrating with 100+ major EU banks via PSD2 and XS2A standards.
Transforming complex requirements into intuitive, high performance web applications.
AWS Certified Developer - Associate
My underlying expertise:
Architecture: System Design, System Architecture, Microservices, Event-Driven Systems, Fintech Systems, PSD2/XS2A, Domain Driven Design, Domain Modeling, 3DS
Backend: Node.js (NestJS, Express, Fastify), TypeScript, PostgreSQL, MySQL, DynamoDB, Payments, Supabase, Prisma, Twilio, Resend, Redis
Frontend: React (Next.js, Remix), TypeScript, JavaScript, PWA
Cloud & DevOps: AWS (Certified Developer), GCP, Terraform, Kubernetes, Docker, GitHub Actions, GitLab CICD, Vercel, Cloudflare
AI: AI-Driven Workflows, Vercel AI, Google Generative AI & Vertex, Hugging Face Models, Modal, Trigger.dev, Inngest, N8N, Deepgram, LangGraph
TypeScript and JavaScript wizard / addict. 👋
Let's discuss how I can architect and build your next-gen platform.
Send me a message to schedule an initial consultation.
I'm always available for a coffee chat, whatever the reason. 🤝
Please feel free to send a message so we can have a chat over a cup of coffee!
Steps for completing your project
After purchasing the project, send requirements so Ognjen can start the project.
Delivery time starts when Ognjen receives requirements from you.
Ognjen works on your project following the steps below.
Revisions may occur after the delivery date.
Client provides project requirements
Share your vision, desired features, and any preferred tech stack.
Initial project assessment & proposal
I will review your requirements and propose a technical solution, timeline, and cost.