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Sasa Miljkovic

@sasamiljkovic

Senior QA Engineer at MOZZART, refactored mobile automation from Java to Python and added Playwright end-to-end coverage.

Serbia

Message

At MOZZART, I develop and maintain mobile and web test automation, including a major refactoring from Java to Python. I also created Playwright end-to-end tests for critical user workflows and regression coverage.

At PREDSENSE.AI and GETBREADCRUMBS.AI, I tested AI-powered features, validating anomaly detection results, AI-generated insights, and AI agent behavior across business scenarios.

At ONYX IQ, I tested lending and financial workflows with SQL and API validation, and participated in performance testing and release validation.

For VTSD, I developed Python automation for processing incoming emails, extracting attachments, and validating business documents. I also founded and developed SALENEUM.APP, a personal productivity and lifestyle application.

Experience

Work history, roles, and key accomplishments

Current

Senior QA Engineer

Current

Mozzart

Jan 2020 - Present (6 years 9 months)

Developed and maintained test automation frameworks for mobile and web, integrated tests into CI/CD, mentored QA team members, and led test process planning.

Python Java Playwright Appium Selenium TestNG Pytest PyQt LambdaTest Jenkins GitLab CI CD REST APIs Postman Oracle Git Gitlab Jira Microservices

QA Analyst (Contract)

GetBreadcrumbs.ai

Jan 2025 - Jan 2026 (1 year)

Performed end-to-end testing of AI agent functionality and user workflows, evaluated AI-generated responses, and identified edge cases through exploratory testing.

AI Agent Testing Manual Testing Exploratory testing API Testing Jira Regression Testing

QA Engineer (Contract)

Onyx IQ

Jan 2023 - Jan 2025 (2 years)

Validated lending and financial workflows, performed backend data validation and API testing, and conducted performance and load testing.

Postman REST APIs Oracle SQL TestRail Jira JMeter Performance Testing Fintech Testing

Automation Engineer (Contract)

VTSD

Jan 2023 - Dec 2023 (11 months)

Developed Python-based automation solutions for processing emails and documents, integrated with ERP systems, and implemented exception handling and monitoring.

Python PywinAuto Windows Automation Scripting ERP Integration Process Automation Workflow Automation

Manual QA Tester

Rhea Software

Jan 2019 - Jan 2020 (1 year)

Performed manual testing of accessibility-focused websites and mobile apps, validated usability and accessibility, and maintained regression test scenarios.

Jira TestLodge Accessibility Testing Mobile Testing Cross Browser Testing Functional Testing

QA Engineer (Contract)

Predsense.ai

Jan 2026 - Present (9 months)

Tested AI-powered anomaly detection and predictive analytics features, validated data processing workflows and AI-generated insights, and collaborated with engineering teams.

REST APIs SQL Jira AI Testing Data Validation Anomaly Detection Exploratory testing

Founder & Developer (Personal Project)

Saleneum.app

Defined product vision and roadmap, designed and developed workflows for productivity and finance, and applied QA best practices throughout development.

React Native Firebase SQLite Supabase TypeScript Product Design QA Testing