Full Stack Developer · System Architect · Automation Builder

I’m a Full Stack Web Developer with a strong focus on building modern, scalable, data-driven systems.

I specialize in:

• Advanced CRM systems
• Multi-tenant architectures
• Smart automation & workflow design
• SaaS dashboards
• Subscription & billing infrastructure
• System integrations & API ecosystems
• Clean backend architectures (SOLID, DTO, service layers)
• High-performance scraping & data processing tools

I like turning complex business logic into simple, elegant and maintainable systems.
Strong product thinking + clean code is my natural combo.

• System Architecture — database design, modular backend structure, scalable workflows
• CRM Engineering — contacts, deals, pipelines, tasks, activities, permissions, notifications
• Automation Design — background jobs, schedulers, triggers, webhooks, status tracking
• API Integrations — Social APIs, financial APIs, SMS/email gateways, payment gateways
• Workflow Intelligence — turning manual business processes into automated decision paths
• Scraping & Data Extraction — browser automation, chunked processing, data normalization
• Multi-Language & Multi-Currency Systems
• Subscription Systems — tier-based limits, quotas, credit logic, usage tracking
• Dashboard Engineering — analytics, charts, logs, activity streams
• User & Role Management — fine-grained permissions, audit logs, security flows
• Clean Code Practices — service layer, repository patterns, DTOs, validators, events

• Contact & customer management
• Lead pipelines & sales flows
• Activity logs, timelines & notifications
• Deals, tasks, notes, reminders
• Team roles & permission layers
• CRM analytics, performance dashboards
• Multi-language, multi-team CRM structures
• Smart automations & conditional workflows
• Attachment, media, document handling
• Activity-based scoring & insights

• Multi-step business workflows
• Background job orchestration
• Cron-based schedulers
• Status-driven pipelines (pending → processing → completed)
• Automatic retries, fail-safes, error isolation
• Data syncing & normalization
• Trigger-based logic (form submission → webhook → automation)

• Browser-controlled scraping (Puppeteer / Playwright)
• De-duplicated, validated datasets
• Chunked result streaming
• High-volume queueing & automatic throttling
• Real-time result dashboards
• Clean, structured business data extraction

• Tenant isolation
• Subscription tiers & feature limits
• Usage tracking
• Billing logic
• Settings panels
• Audit logs
• High-performant APIs

“A good system is not the one with the most features —
it’s the one where everything makes sense, scales cleanly,
and runs without manual effort.”

I enjoy building systems that:

• scale without breaking
• stay maintainable for years
• automate real business pain points
• support multilingual global usage
• work fast, stable and predictably

I’m obsessed with clean architecture, structured code and meaningful automation.

• 📩 Email: fatihbarissahan@gmail.com
• 💬 Open to collaborating on CRM platforms, automation systems, SaaS products and complex backend architectures.