Mustafa A.-Senior SAP Basis & Technical Operations Specialist
Check rate
Experience
Business Applications & Systems Manager
Destek Investment Securities
- Managed controlled upgrades, patch deployments, and compliance-driven changes for business-critical trading and core applications.
- Administered Microsoft SQL Server environments and supported server deployment, database operations, monitoring, and production reliability.
- Configured Zabbix monitoring to improve platform-health visibility and support earlier identification of operational issues.
- Provided L1/L2 production support for trading platforms and core applications, including incident triage, troubleshooting, stakeholder communication, and vendor coordination.
- Closed data-centre audit findings and strengthened access-control processes through RBAC and maker-checker workflows.
- Managed OTP-SMS and third-party API integrations across internal teams and external providers.
Senior SAP Basis / S/4HANA Administrator
A101 Yeni Mağazacılık A.Ş.
- Performed SAP Basis and technical operations for a nationwide retail organization with 10,000+ stores, supporting the availability, performance, security, and continuity of business-critical enterprise platforms.
- Administered SAP S/4HANA, SAP HANA, SAP NetWeaver, SAP ERP/R3, and Microsoft SQL Server environments across day-to-day production operations.
- Contributed to the SAP S/4HANA migration programme, supporting technical readiness, implementation activities, go-live execution, and post-go-live stabilization.
- Managed SAP transport activities, upgrades, batch and background-job operations, monitoring, incident investigation, and production-support processes.
- Improved SAP platform reliability and transaction responsiveness through proactive monitoring, infrastructure improvements, controlled upgrades, and production incident resolution.
- Worked with ABAP developers, functional consultants, infrastructure teams, and external vendors to diagnose, resolve, and prevent business-critical SAP incidents.
- Strengthened SAP governance, access-control, security, and compliance practices in line with internal IT controls, GDPR requirements, and operational standards.
- Contributed to A101's cloud transformation initiative, recognized as Grand Winner, SAP Quality Awards 2021 – Cloud Transformation.
Retail Systems & Payment Systems Administrator
A101 Yeni Mağazacılık A.Ş.
- Supported retail payment and store-system operations across the nationwide network, including POS, ECR, payment terminals, and multimedia CRM platforms.
- Coordinated banking relationships, vendor delivery, and third-party integrations supporting payment processing and store operations.
- Coordinated UAT, production rollouts, field-issue resolution, and post-deployment support for ECR, payment-terminal, and CRM solutions.
IT Systems Engineer
Verifone EEMEA Region
- Supported POS, payment-infrastructure, and enterprise-system implementations for Verifone’s Eastern Europe, Middle East, and Africa operations.
- Performed technical troubleshooting, system-integration support, performance analysis, and post-deployment operational support for payment environments.
- Collaborated with regional teams, customers, and vendors to translate business requirements into technical implementation and support activities.
IT Systems Consultant
Ericsson
- Delivered system-engineering, business-analysis, and implementation support for billing, charging, collection, and transaction-processing systems.
- Supported enterprise integration and operational delivery across telecommunications, banking, payments, and technology-sector engagements.
- Gathered and analysed business and technical requirements, translating them into implementation, integration, and production-support activities.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Retail, Banking and Finance, Information Technology, and Telecommunication.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology.
Summary
Senior SAP Basis and technical operations professional with 10+ years of experience supporting business-critical platforms across large-scale retail, telecommunications, and financial-services environments. Experienced in SAP S/4HANA, SAP HANA, SAP NetWeaver, SAP ERP/R3, Microsoft SQL Server, production support, transport management, upgrades, batch operations, monitoring, and incident resolution. Supported SAP and retail technology operations for a nationwide retailer with 10,000+ stores and contributed to an award-winning SAP cloud transformation initiative.
Skills
Sap Platform & Basis Operations
- Sap S/4hana
- Sap Hana
- Sap Netweaver
- Sap Erp/R3
- Sap Basis Administration
- Sap Transport Management
- Sap Upgrades
- Batch Processing
- Background Job Monitoring
- Production Support
Database, Infrastructure & Monitoring
- Microsoft Sql Server
- Linux/Unix
- Server Deployment
- Zabbix
- System Monitoring
- Performance Monitoring
- Incident Troubleshooting
- Platform Reliability
Operations, Controls & Delivery
- Incident Management
- Change Management
- Release Management
- Sap Security
- Rbac
- Maker-Checker Controls
- Audit Remediation
- Uat
- Vendor Management
- Api And Third-Party Integrations
Domain Experience
- Large-Scale Retail
- Payment Systems
- Pos
- Ecr
- Payment Terminals
- Banking Integrations
- Trading Platforms
- Telecom Billing
- Charging
- Collection Systems
Languages
Education
Beykent University
BSc · Computer Engineering · Istanbul, Turkey
Certifications & licenses
Introduction to SAP HANA Administration
SAP
Managing ABAP Systems on SAP NetWeaver
SAP
Oracle / PL/SQL Programming
Bilge Adam
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Mustafa is based in Istanbul, Turkey.
Mustafa speaks the following languages: Turkish (Native), English (Advanced), French (Intermediate).
Mustafa has at least 10 years of experience. During this time, Mustafa has worked in at least 5 different roles and for 4 different companies. The average length of individual experience is 2 years and 1 month. Note that Mustafa may not have shared all experience and actually has more experience.
Based on recent experience, Mustafa would be well-suited for roles such as: Business Applications & Systems Manager, Senior SAP Basis / S/4HANA Administrator, Retail Systems & Payment Systems Administrator.
Mustafa's most recent position is Business Applications & Systems Manager at Destek Investment Securities.
In recent years, Mustafa has worked for Destek Investment Securities and A101 Yeni Mağazacılık A.Ş..
Mustafa is most experienced in industries like Retail, Banking and Finance, and Information Technology. Mustafa also has some experience in Telecommunication.
Mustafa is most experienced in business areas like Information Technology.
Mustafa has recently worked in industries like Retail and Banking and Finance.
Mustafa has recently worked in business areas like Information Technology.
Mustafa holds a Bachelor in Computer Engineering from Beykent University.
Mustafa has 3 certificates. These include: Introduction to SAP HANA Administration, Managing ABAP Systems on SAP NetWeaver, and Oracle / PL/SQL Programming.
The availability of Mustafa needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 21 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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