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Marat Mirzoiev
TECHNICAL SUPPORT L2-L3 | PAYMENTS, MONITORING & API INTEGRATIONS
[open contact info](look above in the "contact info" section) | Telegram: @xtcdmt

PROFILE

Technical Support L2-L3 specialist with hands-on experience in B2B payments, investigating incidents in production and
staging, and supporting API integrations. I work with both merchant onboarding and new payment providers: review API
documentation and technical fit before integration. Identify root causes through log and metric analysis, test payment scenarios,
document recurring solutions, and escalate incidents to the appropriate teams. Target roles: Technical Support, Monitoring
Specialist, and Payment/API Integration Specialist.

CORE SKILLS

Provider & merchant API integrations: pre-integration API review, technical feasibility, payment methods and flows,
requests/responses, statuses, callbacks/webhooks, test environments, and merchant support
Monitoring & incident management: internal and provider logs in production and staging, metrics and alerts, triage, technical
research, root-cause analysis, and escalation to Development/Product
Payment operations & testing: PSP-side post-integration testing, test payments, payment routing and cascades, anti-fraud/anti-spam
configuration, new payment flows and methods
Automation, documentation & B2B communication: appeal-process automation, Confluence knowledge base, internal API guides
and instructions, operational chats with merchants, providers, and internal teams
Tools: Elastic / OpenSearch (Kibana), Grafana, Google Cloud Logs Explorer, SQL, Metabase, RabbitMQ, Kafka, Swagger, Postman,
Jira Service Management, Zendesk

WORK EXPERIENCE

Technical Support L2-L3
FinTech Payment Processing Platform (iGaming, NDA) | 2024 - 2026
• Provided end-to-end technical support to merchants during API integrations, resolved technical blockers, and verified readiness for
launch.
• Reviewed payment-provider API documentation before integration: technical feasibility, methods and flows, API requirements,
statuses/callbacks, test environments, and platform fit; clarified open questions with providers for Development.
• Performed PSP-side post-integration testing: test payments, payment-method and flow validation, status and callback checks, and
follow-up on identified issues.
• Analyzed internal and provider logs in production and staging; monitored metrics, responded to alerts, and investigated technical
issues.
• Managed technical incidents: triage, research, root-cause investigation, and escalation to the appropriate Development and Product
teams.
• Configured payment routing and cascades, anti-fraud and anti-spam rules; tested new payment flows and methods.
• Automated appeal workflows, maintained technical documentation, and conducted B2B communications with merchants, providers,
and internal teams.
Support Specialist - Technical Support Engineer (L3)
Financial Company EVO / Payment Service RozetkaPay | 2020 - 2024
• Analyzed production incidents using logs and metrics, assessed impact, and identified root causes.
• Supported client and partner integrations, including technical setup and procedure compliance.
• Used Elastic (Kibana), Grafana, and Google Cloud Logs Explorer for monitoring and data analysis.
• Resolved escalations from L1/L2, reproduced incidents, and contributed to product and process improvements.
Communications Operator - Department Administrator - Reputation Manager
Proxy-Seller / ProxySale / YouProxy | 2017 - 2024
• Provided customer technical support for proxy connection issues and incident resolution.
• Worked with 1C for order processing and customer-interaction workflows.
• Coordinated team schedules and task execution; monitored service reputation with YouScan and managed external feedback
channels.

LANGUAGES

Ukrainian - fluent | Russian - fluent | English - Upper-Intermediate (technical written communication)