Contact Tugrul Yildirim
Get a custom proposalCustom CRM, ERP & API Integration Developer
I design and build Laravel-based CRM, ERP, B2B portal, SaaS and API integration systems for manufacturing, wholesale, distribution and other operationally complex businesses.
My work helps teams replace spreadsheets, reduce duplicate data and control the workflows connecting sales, quoting, orders, inventory, procurement and finance. Typical engagements include custom CRM and ERP development, CRM–ERP integration, RFQ and quote-to-cash automation, B2B customer portals, system modernization and integration reliability reviews.
I approach operational software as business infrastructure. Each engagement begins with workflow discovery, measurable scope and clear acceptance criteria. Delivery is staged and includes role-based permissions, auditability, reliable API contracts, documentation, code ownership and structured handover.
I work independently and communicate directly with the decision-makers and technical teams responsible for the project. NDA and long-term stabilization or support options are available when required.
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Min project size
$10,000+
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Hourly rate
$150 - $199 / hr
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Employees
Freelancer
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Locations
İstanbul, Türkiye
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Year founded
Founded 2016
1 Locations
- İstanbul , Türkiye
Service Lines
- API Development
- 25%
Select Focus Area
- Application Platforms
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- Linux server
- 50%
- Windows server
- 20%
- Amazon Application Development Framework
- 10%
- Azure Platform
- 10%
- CRM Functions
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- CRM Customer Support
- 20%
- CRM Social Relationship Management
- 20%
- Other CRM focus
- 20%
- Sales automation
- 20%
- API Type
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- REST API
- 50%
- Partner API
- 20%
- Webhook API
- 20%
- OPEN API
- 10%
- CRM Solutions
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- Other CRM
- 100%
- ERP Solutions
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- ERP Implementation
- 50%
- Other ERP
- 50%
Industries
- Manufacturing
- 50%
- Supply Chain, Logistics, and Transport
- 25%
- eCommerce
- 15%
- Business services
- 10%
Clients
- Small Business (<$10M)
- 60%
- Midmarket ($10M - $1B)
- 40%
Pricing Snapshot
Min. project size
$10,000+
Avg. hourly rate
$150 - $199
/hr
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Packages we offer:
Custom CRM/ERP Discovery Sprint
A structured discovery engagement for manufacturers, wholesalers and B2B companies planning a custom CRM or ERP-connected workflow. I analyze your processes, data and integrations, then deliver a requirements backlog, solution architecture and implementation roadmap. Development is quoted separately.
Small
Best for one team and one core workflow
$2,500
/total
- Discovery Workshops: 1 workshop
- Departments Covered: 1 department
- Core Workflows Mapped: 1 workflow
- Systems Reviewed: Up to 2 systems
- Requirements Backlog: Essential
Medium
Best for multi-team CRM and ERP workflows
$5,000
/total
- Discovery Workshops: Up to 3 workshops
- Departments Covered: Up to 3 departments
- Core Workflows Mapped: Up to 3 workflows
- Systems Reviewed: Up to 4 systems
- Requirements Backlog: Detailed
Large
Best for complex, integration-heavy operations
$8,500
/total
- Discovery Workshops: Up to 5 workshops
- Departments Covered: Up to 5 departments
- Core Workflows Mapped: Up to 6 workflows
- Systems Reviewed: Up to 6 systems
- Requirements Backlog: Comprehensive
| Features |
Small $2,500 /total |
Medium $5,000 /total |
Large $8,500 /total |
|---|---|---|---|
|
Discovery Workshops |
1 workshop |
Up to 3 workshops |
Up to 5 workshops |
|
Departments Covered |
1 department |
Up to 3 departments |
Up to 5 departments |
|
Core Workflows Mapped |
1 workflow |
Up to 3 workflows |
Up to 6 workflows |
|
Systems Reviewed |
Up to 2 systems |
Up to 4 systems |
Up to 6 systems |
|
Requirements Backlog |
Essential |
Detailed |
Comprehensive |
|
Solution Architecture |
High-level |
Detailed |
Full blueprint |
|
Roadmap & Budget Estimate |
High-level |
Phased plan |
Phased and prioritized |
|
Risk & Dependency Register |
Not included |
Included |
Included |
|
Final Review Session |
60 minutes |
90 minutes |
120 minutes |
|
Small $2,500 /total |
|
|---|---|
|
Discovery Workshops |
1 workshop |
|
Departments Covered |
1 department |
|
Core Workflows Mapped |
1 workflow |
|
Systems Reviewed |
Up to 2 systems |
|
Requirements Backlog |
Essential |
|
Solution Architecture |
High-level |
|
Roadmap & Budget Estimate |
High-level |
|
Risk & Dependency Register |
Not included |
|
Final Review Session |
60 minutes |
|
Medium $5,000 /total |
|
|---|---|
|
Discovery Workshops |
Up to 3 workshops |
|
Departments Covered |
Up to 3 departments |
|
Core Workflows Mapped |
Up to 3 workflows |
|
Systems Reviewed |
Up to 4 systems |
|
Requirements Backlog |
Detailed |
|
Solution Architecture |
Detailed |
|
Roadmap & Budget Estimate |
Phased plan |
|
Risk & Dependency Register |
Included |
|
Final Review Session |
90 minutes |
|
Large $8,500 /total |
|
|---|---|
|
Discovery Workshops |
Up to 5 workshops |
|
Departments Covered |
Up to 5 departments |
|
Core Workflows Mapped |
Up to 6 workflows |
|
Systems Reviewed |
Up to 6 systems |
|
Requirements Backlog |
Comprehensive |
|
Solution Architecture |
Full blueprint |
|
Roadmap & Budget Estimate |
Phased and prioritized |
|
Risk & Dependency Register |
Included |
|
Final Review Session |
120 minutes |
Our Story
I started my independent software development practice in 2016 and now focus on custom CRM, ERP and integration systems for manufacturing, wholesale, distribution and complex B2B operations.
My work is built around real operational workflows rather than generic feature lists. I map how sales, quoting, orders, stock, procurement and finance currently interact; identify the highest-risk manual handoffs; and deliver a maintainable system in controlled stages.
Meet the Team
Tuğrul YıldırımIndependent CRM, ERP & Integration Developer
Tuğrul Yıldırım is a full-stack Laravel and React developer focused on custom CRM, ERP, B2B portal, SaaS and API integration systems.
What Sets Us Apart
Workflow-First Delivery (Not Feature-First)
I begin with the real process: ownership, approvals, exceptions, handoffs and measurable acceptance criteria. The software is then designed around the workflow instead of forcing teams into unrelated generic modules.Reliable Integration Engineering
I treat integrations as production systems. Data ownership, versioned contracts, idempotency, retries, reconciliation, structured logging and failure visibility are defined before critical business data is synchronized.Direct Technical Ownership
Clients communicate directly with the developer responsible for discovery, architecture and delivery. Engagements include staged releases, code ownership, API documentation and structured handover so the system can be maintained long term.Locations (1)
Contact Tugrul Yildirim
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