Melvin Leonardo Sanchez Calvo

Melvin Leonardo Sanchez Calvo

About

Detail

Fraud & Risk Analytics | SQL | Anomaly Detection | Trust & Safety | IRT | Remote-Ready
Provincia de San José, Costa Rica

Contact Melvin regarding: 
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Full-time jobs
Starting at USD30k/year

Timeline


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Job
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Education

Résumé


Jobs verified_user 0% verified
  • Syniverse
    Customer Operations Specialist II - Fraud & Risk Analytics
    Syniverse
    Jun 2022 - Current (4 years 5 months)
    Global telecom technology firm specializing in messaging fraud detection and CDR
    analytics across international carrier networks.

    • Spearhead fraud and anomaly analysis across high-volume international messaging
    clusters and CDR datasets, proactively surfacing emerging risk patterns before
    they escalate to client-facing exposure.
    • Design and execute SQL queries against large structured datasets to evaluate
    fraud trends, benchmark rule performance, and identify detection gaps across
    multiple carrier clients.
    • Reclassify fraud typologies based on behavioral signal analysis, directly
    improving the accuracy of prevention policies and automated detection systems.
    • Produce exec
  • DXC Technology
    Risk & Collections Analyst
    DXC Technology
    Jan 2022 - Apr 2022 (4 months)
    Global IT services firm; delinquency risk analysis across residential and
    commercial account portfolios in North America.

    • Analyzed delinquent portfolios to identify behavioral risk patterns, default
    root causes, and recovery probability indicators.
    • Segmented accounts into risk tiers using financial and behavioral data, tailoring
    recovery strategies to optimize resolution rates.
    • Applied investigative techniques including skip tracing and credit profile
    analysis to locate high-risk delinquency cases.
    • Maintained comprehensive audit-ready documentation ensuring full regulatory
    compliance and internal quality standards.
  • Bill Gosling Outsourcing
    Collections Agent - Risk & Financial Process Monitoring
    Bill Gosling Outsourcing
    Oct 2020 - Dec 2021 (1 year 3 months)
    Financial services operations; account risk analysis and collections for U.S.-based
    residential and commercial auto loan portfolios.

    • Detected financial anomalies and assessed operational risk exposure across auto
    loan accounts using data-driven analysis.
    • Investigated complex scenarios including bankruptcies, payment disputes, and
    irregular transaction activity with full audit documentation.
    • Built operational and risk performance metrics supporting internal compliance
    reviews and leadership portfolio decisions.
    • Engineered customized recovery strategies tailored to delinquency stage,
    financial profile, and risk exposure.
  • Uber
    COE T2 & IRT Urgent Specialist - Trust & Safety Investigations
    Uber
    Dec 2016 - May 2020 (3 years 6 months)
    Global mobility platform; Incident Response Team (IRT) agent handling
    high-sensitivity cases across Latin American markets.

    • Served as IRT agent managing sensitive cases involving fraud, theft, physical
    aggression, accidents, and sexual abuse — requiring strict confidentiality,
    trauma-informed communication, and rapid risk assessment under pressure.
    • Investigated behavioral and transactional data to detect fraud patterns,
    incentive abuse, and platform manipulation, connecting case-level signals to
    broader risk trends.
    • Assessed enforcement decision quality by auditing false positive and false
    negative outcomes, driving improvements in detection threshold calibration.
    • Es
  • American Express
    Fraud Analyst, Prepaid Products
    American Express
    Sep 2015 - Dec 2015 (4 months)
    Global financial services institution; transaction-level fraud detection across
    prepaid card portfolios including gift cards, reloadable cards, and GPR products.

    • Executed deep-dive transaction analysis identifying velocity anomalies, geographic
    clustering, and behavioral indicators associated with organized fraud activity.
    • Evaluated fraud detection rule effectiveness by measuring false positive impact
    and recommending targeted rule adjustments to improve precision.
    • Conducted multi-signal investigations combining transactional data, account
    history, and behavioral risk indicators to support accurate enforcement decisions.
    • Detected and documented emerging fraud schemes including car
Education verified_user 0% verified
  • Fidelitas University
    Advertising Design
    Fidelitas University
    Jan 2014 - Jan 2022 (8 years 1 month)
  • C
    High School Diploma
    C.T.P. Granadilla
    Jan 2010 - Jan 2012 (2 years 1 month)