You will get Get a professional IT consultation for your business

Oleksandr S.Status: Offline
Oleksandr S.

Let a pro handle the details

Buy Web Application Programming services from Oleksandr, priced and ready to go.
Oleksandr S.Status: Offline
Oleksandr S.

Let a pro handle the details

Buy Web Application Programming services from Oleksandr, priced and ready to go.

Project details

You will get a 2-hour IT & Business consultation with a professional development team.
We help startups, enterprises, and business owners solve their most important tech and business challenges — from choosing the right tech stack and reviewing architecture to scaling products and optimizing processes.

With years of experience in enterprise-level software development and product strategy, our team will provide clear, actionable recommendations tailored to your needs. After the session, you’ll leave with practical solutions and a concrete roadmap for your next steps.

FAQ (опционально, можно добавить 2–3 вопроса)

Q: How should I prepare for the consultation?
A: Please provide a short project description, your main challenges, and any specific questions in advance. This will help us use the 2 hours as efficiently as possible.

Q: Can I get follow-up materials after the session?
A: Yes, we can provide a written summary with recommendations as an add-on.

Q: Who will conduct the consultation?
A: The session is held with our core team (developers and business experts) to give you multi-angle expertise, not just a single perspective.
Programming Languages
HTML & CSS, JavaScript, Java
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Design

What's included $60

These options are included with the project scope.

$60
  • Delivery Time 1 day
  • Number of Revisions 0
  • Number of Pages 0
    • Design Customization
    • Content Upload
    • Responsive Design
    • Source Code
Oleksandr S.Status: Offline

About Oleksandr

Oleksandr S.Status: Offline
Senior Full-Stack Engineer | Java, Spring Boot, React | AI & Cloud
Warsaw, Poland - 6:23 pm local time
Senior Full-Stack Engineer and co-founder of Deffina, a results-driven software company trusted by brands like Visa, Macy’s, and TaxAgent. I combine deep coding expertise with a business-focused mindset to help startups and enterprises build secure, scalable, and high-performance applications that drive measurable business results.

Over the past 7+ years, I’ve delivered software for clients in the US, UK, Netherlands, and Poland, working on projects ranging from fast MVPs to large-scale enterprise-grade systems. My approach is simple: understand your business goals first, then engineer the solution to achieve them.

💻 What I Deliver
Full-cycle product development — backend (Java, Spring Boot), frontend (React, Next.js), DevOps, QA, UX/UI.

AI-powered automation — integrating OpenAI, custom ML models, and intelligent workflows to reduce costs, increase efficiency, and unlock new capabilities.

Cloud-native architecture — AWS, Azure, GCP — scalable, secure, and compliance-ready for industries like fintech, retail, and SaaS.

High-load systems & microservices — designed for performance, fault tolerance, and long-term maintainability.

Outstaffing / team extension — vetted engineers seamlessly integrated into your processes and culture.

Custom web & mobile applications — React Native, Swift, Kotlin, cross-platform and native development.

🏆 Proven Results for Leading Brands
Visa — Optimized transaction processing systems, reducing response time and enabling higher daily volume. This directly improved revenue capacity and operational efficiency.

Macy’s — Enhanced e-commerce performance, site speed, and personalization algorithms, leading to higher conversion rates and increased average order value.

TaxAgent — Developed automation tools that cut manual processing by 70%, freeing up teams for high-value tasks and improving client retention.

⚙️ My Tech Stack
Backend: Java, Spring Boot, Node.js, .NET
Frontend: React, Next.js, Angular, Vue.js
Mobile: React Native, Swift, Kotlin
Databases: PostgreSQL, MySQL, MongoDB, Redis
Cloud & Infrastructure: AWS, Azure, Google Cloud, Kubernetes, Docker
AI & Automation: OpenAI, TensorFlow, LangChain, custom ML models

🌍 Why Clients Work With Me
Business-first approach — I align every technical decision with your business goals to ensure ROI.

Predictable delivery — Clear milestones, transparent reporting, and no missed deadlines.

Agile methodology — Short iterations, early feedback loops, and constant optimization.

Long-term partnerships — Many clients start with a small engagement and grow with us into multi-year collaborations.

Global reach — Projects delivered for fintech, e-commerce, telecommunications, and SaaS companies in multiple countries.

🛠 How I Work
Discovery & Planning — Understand your business model, challenges, and goals.

Architecture & Design — Define a scalable, future-proof system design.

Development — Write clean, maintainable, and test-covered code.

Quality Assurance — Manual & automated testing to ensure zero critical bugs.

Deployment & Monitoring — CI/CD pipelines, cloud infrastructure setup, real-time monitoring.

Ongoing Support — Continuous improvements, scaling, and feature expansion.

📈 Additional Capabilities
Rapid MVP delivery for startups looking to validate product-market fit.

Enterprise modernization — upgrading outdated systems to cloud-native, scalable architectures.

Data integration & analytics — turning raw data into actionable business insights.

Security & compliance — ensuring solutions meet GDPR, PCI DSS, and ISO standards.

Whether you need a dedicated senior developer, a full product team, or a technology partner to scale your business, I can help you move from concept to market with speed, precision, and confidence.

📩 Message me to discuss your project or schedule a free consultation. Let’s build something that delivers real business value.

Steps for completing your project

After purchasing the project, send requirements so Oleksandr can start the project.

Delivery time starts when Oleksandr receives requirements from you.

Oleksandr works on your project following the steps below.

Revisions may occur after the delivery date.

2-Hour Consultation Session

We will meet for a 2-hour live consultation, discuss your challenges in detail, review any provided materials, and give you clear, actionable recommendations for the next steps.

Review the work, release payment, and leave feedback to Oleksandr.