Martin Costantini
Martin Costantini

Senior QA Analyst | Manual Testing (Web, Mobile & API)

Open to offers · Member since 13 Oct 2026
Location
Buenos Aires, Argentina
Desired salary
Confidential
Work preference
Remote Only / Full Time, Part Time, Contract, Freelance, Temporary
Experience level
Senior

About

Professional summary

I am a QA Analyst with more than six years of experience testing web, mobile, and API applications in Agile environments. I specialize in manual testing, with a strong focus on quality assurance, defect prevention, and clear communication with development teams.

I have worked on healthcare, labor union, travel, and transportation platforms, including systems that process credit card and digital wallet payments. My experience includes validating critical workflows, data consistency, payment scenarios, and integrations across multiple systems.

I design and execute test plans, test cases, regression tests, smoke tests, exploratory tests, usability tests, and compatibility tests. I am experienced in testing releases, hotfixes, and production-related incidents across different deployment environments.

I use Postman and SoapUI for API and microservice testing, SQL for data validation, and Charles Proxy and Fiddler for network traffic analysis. My networking background, including CCNA and CCENT studies, helps me diagnose issues thoroughly and produce precise, reproducible bug reports.

I work comfortably with Agile and Scrum teams, participating in planning, refinement, and synchronization meetings. I also use cloud-based AI tools to accelerate test case design, test data generation, and defect documentation while maintaining a focus on software quality.

I communicate effectively in Spanish and English and have experience writing detailed technical bug reports for international teams. I am motivated by improving QA processes, reducing issue resolution time, and helping teams deliver reliable software products.

Skills

20 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Application Utilities

Collaboration

Design

Languages & Frameworks

Experience

Career history

QA Analyst CONFLUENCIA IT

I design, execute, and maintain test plans and test cases for web and mobile applications used by healthcare organizations and labor unions. I validate business requirements and workflows, including payment integrations with digital wallets and data consistency between connected systems.

I test APIs and microservices with Postman and SoapUI, perform regression testing, re-testing, and release or hotfix validation across deployment environments. I report and track defects in Jira and Redmine, collaborate with developers, participate in Agile meetings, and use cloud-based AI tools to improve test design, test data generation, and bug report drafting.

QA Analyst / Level 1 Support PROSYS S.A.

I analyzed critical customer-reported incidents in ticketing and booking systems for the tourism industry. I reproduced and isolated issues, prepared technical documentation for developers, and supported the resolution of production incidents.

I tested payment flows involving credit cards and digital wallets, verified transaction results and cross-system consistency, and ran smoke tests after critical production releases. I also designed browser and operating-system compatibility matrices and improved bug resolution times through detailed defect reports and knowledge-base contributions.

Crowdtester / Freelance QA uTest

I performed exploratory, usability, and performance testing for mobile applications and web platforms used by international clients across different industries. I evaluated application behavior, user experience, and functional issues in varied test environments.

I monitored network and API traffic on mobile devices using Charles Proxy and Fiddler. I wrote detailed bug reports in English with logs, screenshots, and videos, enabling development teams to reproduce and resolve issues efficiently.

Education

Learning history

Coderhouse

Manual QA Tester, Web, Mobile and API Testing

Specialization in manual quality assurance testing for web, mobile, and API applications.

Instituto PROYDESA

CCNA / CCENT, Networking, Routing & Switching

Training in networking, routing, and switching.

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