Денис

Denys Zub
Integration Support Engineer (L2/L3) | Technical Support Engineer
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | LinkedIn

SUMMARY
Integration and technical support specialist with 2+ years of experience on B2B SaaS and ERP integrations at
Advantive. Most of my days went into finding out why data did not sync between CRM and ERP: reproducing
the issue, checking API calls in Postman and data in SQL, and handing developers a clear bug report.
Led a support optimisation initiative that raised daily resolved tickets by 65% with the same people. Comfortable
with Linux, Bash and the command line, and used to explaining technical issues to non-technical clients.
English C1.

SKILLS
● Support: L2/L3 support, troubleshooting, root cause analysis, issue reproduction, bug reporting,
incident management, ticket triage, SLA, escalation management, knowledge base
● Technical: SQL, REST API, JSON, XML, Postman, ODBC, Azure Entra ID, Linux, Bash, Git, Docker,
Python
● Systems: Microsoft Dynamics 365 Business Central, Oracle NetSuite, SAP Business One, MYOB,
Acumatica, Pronto, Cin7, Salesforce
● Tools: Jira, Notion, Wrike, Google Sheets

WORK EXPERIENCE
Project Manager (Integration Support & Escalations)
Advantive, Opmetrix B2B CRM | May 2026 - Present
● Handled support escalations for ERP integrations: investigated sync failures between Opmetrix and
Business Central, MYOB, Acumatica, Pronto, Cin7 and NetSuite
● Troubleshot ODBC/DSN connections, API permission issues (Azure Entra ID, Business Central
service-to-service authentication) and broken endpoints after environment migrations
● Reproduced issues in UAT and sandbox environments and wrote bug reports with steps and payloads
for developers
● Coordinated server migrations with client IT teams: remote access, connection setup, cutover
● Built an integration support knowledge base from scratch
● Kept clients in Australia and New Zealand updated on open issues and set clear expectations on
timelines
Technical Project Manager
Advantive, Pepperi B2B CRM | Oct 2024 - Nov 2025
● Led a support optimisation initiative. Daily resolved tickets went from 4.3 to 7.1 (+65%) with the same
team
● Handled incidents for an enterprise MRO distributor in the US (1,500-hour annual account): first
response, root cause analysis, priority, fix with developers
● Investigated database performance and load issues with SQL together with developers
● Maintained SQL-based data operations and integration documentation
● Automated task tracking and team updates in Google Sheets with Apps Script
React Native Developer
Public-sector mobile app | Jun 2024 - Nov 2024
● Developed and maintained cross-platform mobile app features with React Native and Expo

EDUCATION
Bachelor's degree, Information Systems and Technologies
Igor Sikorsky Kyiv Polytechnic Institute | expected Jun 2027
Relevant courses: Information Systems Infrastructure, Information Systems Security, QA of Embedded Systems

CERTIFICATIONS
● Oracle SQL & Database Specialization, LearnQuest, 2025
● CS50x: Introduction to Computer Science, Harvard

LANGUAGES
Ukrainian: Native | English: C1 (EF SET 90/100)

INTERESTS
Project delivery and planning (big fan of Bent Flyvbjerg's How Big Things Get Done), minimalistic workflows,
workflow automation, terminal tooling, guitar and bass