CoSoft

CoSoft

Turning MVPs into Scalable Enterprise Products | Full-Cycle Development

Ari'el, ישראל
פרילנסר

אודותינו

מפתח Full Stack בכיר | מומחה React, Next.js & Python | פיתוח מוצרים מורכבים

נעים להכיר, אני ירון. אני לא רק מתכנת פרילאנסר, אלא שותף טכנולוגי לעסק שלך.
אני מתמחה בבניית מערכות Web מורכבות, פלטפורמות SaaS וחנויות איקומרס ברמה הגב��הה ביותר.

היתרון שלי:
אני עובד במודל של "צוות בוטיק". כשאתה שוכר אותי, אתה מקבל מעטפת מלאה: אני מוביל את הפיתוח (Frontend/Architecture), ועובד צמוד עם איש Backend בכיר ו-מעצב UI/UX מהצוות שלי.

השירותים שלי:
✅ פיתוח: React.js, Next.js, Python (Django/FastAPI), PHP.
✅ עיצוב: UI/UX ברמה בינלאומית (Figma).
✅ חדשנות: Telegram Mini Apps, מערכות מועדון לקוחות, אינטגרציות AI.

מתאים במיוחד לסטארטאפים ולעסקים שרוצים לעבור מ-MVP למוצר Production יציב וסקיילבילי.
דובר עברית, רוסית ואנגלית. זמין לעבודה מיידית.

שפות

רוסית
שפת אם
אנגלית
שליטה טובה
עברית
שליטה בינונית

Portfolio

0

תחומי התמחות

תכנות ופיתוח תוכנה

130 ₪ לשעה
HTML5, CSS3, JavaScript
Advanced Frontend Engineering & Performance Optimization.

While frameworks change, the core remains. I possess deep knowledge of raw HTML/JS/CSS, allowing me to solve complex issues that framework-only developers cannot fix.

My Engineering Standards:

- Modern JavaScript (ES6+ / TypeScript): Writing strictly typed, bug-free logic. No "spaghetti code."

- Semantic HTML5: Structuring code specifically for SEO and Accessibility (a11y). Google ranks my sites higher because robots understand them better.

- Advanced CSS: Mastery of Tailwind CSS, SCSS, and modern layout techniques (Grid/Flexbox). I ensure Pixel-Perfect implementation across all browsers (Chrome, Safari, Firefox).

- Performance: Optimization of Core Web Vitals (LCP, CLS). I know how to minimize reflows and repaints for 60fps animations.

I build the solid foundation upon which your application runs.
PHP
Modern PHP Development (Laravel / Symfony).

PHP powers 70% of the web, but quality matters. My backend partner specializes in Modern Enterprise PHP, building secure and fast applications.

Our PHP Expertise:

- Frameworks: Laravel & Symfony ecosystem. We write clean, object-oriented code (OOP).

- API Development: Building robust RESTful / GraphQL APIs to feed data to my React/Next.js frontends.

- Speed: Optimization for high traffic (Redis caching, database tuning).

- Legacy Refactoring: We can take an old PHP project and migrate it to a modern architecture.

Stable, proven, and cost-effective solutions for business logic.
Scripting
Business Automation, Scraping & Bots (Python/Node.js).

We write scripts to automate boring tasks and save you money.

What we automate:

- Telegram Bots: Advanced bots for sales, support, and community management (our specialty).

- Data Scraping: Parsers to monitor competitor prices or gather leads from the web.

- API Integrations: connecting different services (e.g., CRM <-> Google Sheets <-> Website) to work as one ecosystem.

- Data Processing: Python scripts for analyzing and formatting large datasets.

If you are doing something manually more than once a day — we can script it.
מתכנת, פיתוח תוכנה כללי
Technical Consulting, Code Audits & CTO Services.

Sometimes you don't need code yet; you need a plan. Or you have a buggy project and need to know why.

I offer High-Level Engineering Services:

1. Code Audit: I will review your current project (React/Python/PHP), find security holes, and tell you why it's slow.

2. Architecture Planning: Designing the database schema and technology stack BEFORE you start spending money on development.

3. Telegram Mini Apps Strategy: Consulting on how to launch your business inside Telegram.

4. Rescue Missions: Fixing critical bugs in abandoned projects.

I provide clarity and technical leadership for your business.
Python
Advanced Python Backend: Django, FastAPI & AI.

For projects requiring heavy calculation, AI integration, or extreme speed, I deploy my Senior Python Partner.

What we build with Python:

- High-Load Backends: Using FastAPI (asynchronous) for real-time applications and Django for secure enterprise systems.

- AI & Data: Integration of OpenAI (GPT) APIs, data scraping, and processing pipelines.

- Telegram Ecosystems: Complex backends for Telegram Mini Apps and Bots.

- Microservices: Scalable architecture using Docker/Kubernetes.

The best choice for Startups, Fintech, and Data-driven projects.
Django
Enterprise-Grade Backend Architecture (Python/Django).

This is the core strength of my partner. We build secure, scalable backends for complex platforms where security and data integrity are paramount.

Our Django Stack:

- DRF (Django Rest Framework): Building robust APIs for React/Next.js frontends.

- Security: Banking-grade security features (ideal for Fintech & Crypto projects).

- Admin Panels: Customizing Django Admin for efficient business management.

- Scalability: Dockerized environments ready for AWS/Google Cloud.

Perfect for Startups, SaaS, and marketplaces that need a solid foundation.
AngularJS
Enterprise Angular Development & Migration Services.

While I personally specialize in React, my in-house partner is a Senior Angular Developer. This allows us to handle heavy Enterprise legacy codebases.

Our Services:

- Maintenance: Support and bug fixing for existing Angular applications (v2+ to v17).

- Migration Strategy: Safely rewriting old AngularJS/Angular apps to modern React/Next.js architecture without breaking business logic.

- Hybrid Apps: Integrating modern components into legacy systems.

Ideal for Enterprise clients (Banks, Insurance, Gov) looking for reliable support.
jQuery Mobile
Legacy Code Modernization & Migration to React.

I don't build new projects on jQuery Mobile (it's obsolete). Instead, I specialize in Rescuing Legacy Projects.

My Service:

- Migration: I safely refactor old, slow jQuery codebases into modern, fast React/Next.js applications.

- Bug Fixing: If you have an existing system that needs maintenance, I can read and fix "spaghetti code" that others refuse to touch.

- Performance Boost: Upgrading from jQuery Mobile to modern frameworks typically increases speed by 300%.

Don't let your business run on 2012 technology. Let's upgrade it.
Full Stack Developers
End-to-End Product Development (React + Python / PHP).

I provide a complete software production cycle. Unlike solo freelancers who get stuck on complex tasks, I lead a specialized unit that delivers fully integrated products.

Our "Right Tool for the Job" Approach:
I handle the Frontend (React/Next.js), while my backend partners handle the server logic based on your needs:

- Option A: Python (Django/FastAPI): Best for High-Load SaaS, AI integrations, and heavy data processing.

- Option B: PHP (Laravel/Symfony): Best for classic Web Applications, CRM systems, and fast-to-market MVPs.

Why hire this setup?

1. Versatility: We don't force one language. We use what's best for YOUR business.

2. Unified Responsibility: I am your single point of contact. I manage the architecture and ensure the Frontend and Backend communicate perfectly.

3. Scalability: From simple admin panels to complex microservices - we cover it all.
React.js
Senior React.js & Next.js Architecture (High-Performance).

I specialize in building large-scale, complex Single Page Applications (SPA) where performance matters.

My Production Stack:

- Next.js (App Router): For perfect SEO, SSR, and lightning-fast initial load.

- State Management: Redux Toolkit / Zustand / Context API — tailored to the project's complexity.

- Code Quality: TypeScript for type safety, ESLint/Prettier for clean code, and strict Component composition patterns.

- Optimization: Solving re-render issues, code splitting, and optimizing Core Web Vitals.

I write clean, reusable, and self-documenting code that is easy to maintain.

עיצוב וגרפיקה

130 ₪ לשעה
עיצוב אתרים
Strategic Web Design: Where UI Meets Performance.

Many designers create beautiful mockups that are impossible to code efficiently. Since I am a Senior Developer working with a Top-Tier Designer, we create Production-Ready Designs.

Our Approach:

1. Mobile-First: We start designing for mobile screens to ensure the perfect experience for 80% of your users.

2. Conversion Focused: Every button, color, and layout choice is based on psychology to drive sales (UX Research).

3. Design Systems: We create a library of components (Figma), ensuring your site remains consistent as it grows.

You get a Figma file that is 100% ready for pixel-perfect React/Next.js development
ממשקים, שמישות, יצירת פרוטוטייפ
Professional UI/UX Design & Prototyping (Integrated Workflow).

I am a Developer who understands the value of great design. That's why I don't rely on generic templates.

How I work:
I work in a permanent pair with a dedicated Senior UI/UX Designer. This allows me to offer a full "Design + Build" service without the overhead of a large agency.

What you get:

1. Modern UI: High-end interfaces (Figma) created by a professional designer, not a developer.

2.Developer-Ready: Since we work together daily, every pixel of the design is technically feasible and optimized for React/Next.js implementation.

3. One Point of Contact: You communicate directly with me. I manage the design process to ensure it matches your business logic perfectly.

Perfect for clients who need a turnkey product but want to avoid managing multiple freelancers.
תלת מימד - מידול, אנימציה, סימולציה
Interactive WebGL & High-End Animations (Creative Frontend).

I specialize in Code-Based Animation to create immersive web experiences that standard websites cannot match.

My Tech Stack:

- 3D on Web: React Three Fiber (R3F), Three.js — rendering 3D models directly in the browser with high performance.

- Advanced Motion: GSAP (GreenSock), Framer Motion for complex scroll animations and micro-interactions.

- Performance First: I ensure that even heavy 3D visuals run smoothly (60 FPS) on mobile devices.

Perfect for promo-sites, crypto-projects, and premium landing pages that need a "WOW" factor.
עיצוב גרפי, ביצועיסט
Digital Branding & Marketing Assets for Tech Companies.

I provide high-end visual support for startups and digital businesses. It’s not just about "pictures"; it’s about a consistent Visual Language.

Services:

- Social Media Kits: Templates for Instagram/LinkedIn that match your website's branding.

- Pitch Decks: Professional presentation design for investors (essential for startups).

- App Assets: Icons, banners, and store screenshots (App Store / Google Play).

Ensure your brand looks premium across all digital touchpoints.
עיצוב לוגו
Premium Brand Identity & Modern Logos.

A logo is the face of your business. My partner specializes in Minimalist & Modern logos that work perfectly in the digital age (app icons, favicons).

What you receive:

- Unique Concept: No clipart or stock templates. 100% custom vector art.

- Scalability: Logos provided in SVG/EPS/AI formats (ready for any size, from a pen to a billboard).

- Brand Guidelines (Mini-Book): A guide on fonts and colors to keep your brand consistent.

We design identities that build trust instantly.
עיצוב תבניות, עיצוב טמפלטים
Custom Component Libraries & Design Systems.

I don't just "install themes". I build scalable Design Systems and reusable component libraries (React/Next.js) for your business.

What I offer:

- Custom Templates: If you need a unique look for a CMS (headless WordPress/Strapi), I build the frontend from scratch, so it looks nothing like a generic template.

- Scalability: I create a set of "Lego blocks" (components) for your project, allowing you to build hundreds of new pages instantly without breaking the design.

- Brand Consistency: Ensuring your digital presence adheres to strict brand guidelines.
עיצוב ממשקי משתמש - UI, UX
Enterprise-Grade GUI & SaaS Interfaces.

Designing complex software requires more than just artistic skills; it requires logic. My tandem (Dev + Designer) specializes in creating intuitive interfaces for heavy-duty applications.

Our Focus:

- Admin Dashboards: Turning complex data into clean, readable graphs and tables.

- SaaS Platforms: User flows that minimize friction and customer support tickets.

- Mobile App UI: Native-feel designs for iOS/Android (and Telegram Mini Apps).

We ensure the GUI is not only beautiful but strictly follows usability principles (heuristics) and is ready for React/Vue implementation.
באנרים ופרסומות
High-CTR HTML5 Rich Media Ads.

Static JPEGs get ignored. I build interactive HTML5 Banners using code (GSAP/CSS) that grab attention and drive clicks.

Why Code-Based Banners?

1. Interactivity: Animations that react to mouse movement.

2. Performance: Lightweight files that load instantly on ad networks (Google Ads, DoubleClick).

3. Scalability: Automating the creation of 50+ banner sizes using code, ensuring brand consistency across all formats.

Ideal for high-budget marketing campaigns that need premium execution.
עיצוב כרטיסי ביקור, הדפסה
Smart Digital Business Cards & NFC Solutions.

In 2025, paper cards are outdated. I create Interactive Digital Business Cards (mini-websites) aimed at networking.

What I offer:

- Digital Profile: A mobile-optimized mini-site with your contacts, portfolio, and "Save to Contacts" (vCard) button.

- QR/NFC Integration: Solutions ready for physical NFC cards.

- Print Design: If required, my partner can also design the physical card to match your digital identity perfectly.

Elevate your networking with a card that never runs out and tracks your leads.
עיצוב דפי נחיתה
Conversion-Driven Landing Pages (Design + Dev).

A landing page has one goal: Sales. My designer and I create pages that convert visitors into leads.

Our Process:

1. Marketing Structure: We don't just draw pretty pictures. We design the flow to guide the user to the "Buy" button (AIDA model).

2. Premium UI: My partner creates a high-end visual style (Figma) that builds trust instantly.

3. Technical SEO: I code the page (Next.js) to load in <1 second, giving you a 100/100 Google Score and cheaper ad clicks (CPC).

Result: A premium landing page that looks expensive but pays for itself through high conversion

בניית אתרים

130 ₪ לשעה
בניית אתרים דינמיים
Next-Gen Web Applications & SaaS Platforms.

I don't build old-school static websites. I build dynamic, interactive Single Page Applications (SPA) that feel like native apps.

My Approach to Dynamic Web:

- Modern Stack: React.js / Next.js for instant page transitions (no reloading).

- Heavy Logic: Custom Dashboards, CRM systems, User Portals with complex roles and permissions.

- Backend Power: Integration with Python/PHP APIs to handle massive data processing securely.

- Real-Time Data: WebSockets for live notifications, chats, and updates.

Whether it's a Corporate Portal or a Booking System, I deliver a scalable, enterprise-grade solution.
בניית אתרים פשוטים, עמודי נחיתה
High-Conversion Landing Pages with Premium Performance.

Why hire a Senior Developer for a Landing Page? Because template builders (Wix/Elementor) are slow, generic, and kill your SEO.

What I deliver:

1. Lightning Speed: 99/100 Google PageSpeed. Fast sites rank higher and sell better.

2. Advanced Animations: Smooth scroll effects, parallax, and interactive elements (GSAP / Framer Motion) that capture user attention.

3. Pixel-Perfect Mobile: A flawless experience on every device, not just "auto-adapted."

4. Marketing Ready: Integrated with analytics, pixels, and CRMs from day one.

I create Digital Business Cards that impress your clients instantly.
סחר אלקטרוני - פייפאל, magento, מג'נטו וכד', Stripe
I build High-Performance Revenue Engines, not just standard online stores.

Specialized in Headless Commerce and Telegram Mini Apps. I move businesses away from slow, generic templates (Shopify/WP) to custom, lightning-fast solutions that dominate the market.

My Unique Offerings:

1. Telegram E-commerce Ecosystems:
Full-fledged shops inside Telegram (Mini Apps) with built-in Gamified Loyalty Systems. I turn users into recurring buyers using points, crypto-rewards, and referral mechanics.

2. Next-Gen Headless Shops:
Using Next.js (Frontend) + Python/PHP (Backend) to separate the storefront from the logic.

- Result: Instant page loads (99/100 Google Speed), higher SEO ranking, and conversion rates 2x higher than template sites.

3. Complex Integrations:

- Smart Inventory Management & ERP sync.

- Hybrid Payments: Fiat (Credit Cards) + Crypto processors.

- AI-driven product recommendations.

If you need a simple shop, use Shopify. If you need a Scalable Digital Asset with complex logic — hire me.
אירוח אתרים, שרתים
Professional deployment and DevOps for High-Load projects.

I don't just "buy hosting". I set up robust environments for Frontend and Backend:

- VPS Configuration: AWS, DigitalOcean, Hetzner.

- CI/CD Pipelines: Setting up GitHub Actions/GitLab CI for auto-deployment.

- Server Management: Nginx/Apache configuration, Docker containers, SSL certificates.

- Database Admin: PostgreSQL / MySQL setup and optimization.

My goal is to ensure your project runs fast, secure, and stable under load.
חיתוך PSD לעיצוב HTML ו- CSS
I convert Figma/Adobe XD designs directly into Modern Component Architecture (React.js / Next.js).

Unlike basic HTML slicing, I provide:

1. Component-Based Approach: Reusable components (React) using Tailwind CSS or Material UI.

2. Performance: 95+ Google PageSpeed score (Core Web Vitals).

3. Interactivity: Smooth animations and state management included.

4. Pixel Perfect: 100% match with your design across all devices.

Perfect for Startups and SaaS looking for scalable frontend code, not just static pages.

נסיון תעסוקתי

אוגוסט 2024 - דצמבר 2025

Frontend Developer

АО ЦТУ
  • Role: Frontend Architect & Lead Developer (Next.js)
  • I was responsible for the architecture and development of a complex enterprise web application from scratch.
  • Key Responsibilities & Achievements:
  • 1. Architecture (FSD): I designed the project structure using the Feature-Sliced Design (FSD) methodology. This ensured the codebase remained scalable, modular, and easy to maintain as the project grew.
  • 2. Core Stack Implementation: Built the application using Next.js and TypeScript for strict type safety and robust logic.
  • 3. State Management: Implemented a complex global state using Redux Toolkit and managed API interactions via Axios.
  • 4. UI System: Integrated Ant Design (AntD) to build a consistent, professional-grade user interface, while customizing components to match specific design requirements.
  • Result: Delivered a stable, scalable production application with a clean architectural foundation.

קורסים, הסמכות, לימודי תעודה

Advanced JavaScript & React.js Engineering

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