C

Carlos Correira

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São Paulo, State of São Paulo, Brazil
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Starting at USD40/hour
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Timeline

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Résumé

Jobs verified_user 0% verified
  • Notion
    Senior Software Engineer
    Notion
    Aug 2023 - Current (3 years 1 month)
    • Architected and implemented cross-border payment disbursement platform in fintech domain using Java Spring Boot with PostgreSQL and React Next.js frontend, employing idempotent state machines and outbox pattern to ensure reliability under network retries and high-volume transaction processing. • Engineered contractor onboarding service orchestrating third-party KYC and KYB integrations, refactoring blocking REST calls into event-driven Kafka pipeline with progressive React UI, reducing completion time from 9 minutes to under 2 minutes while improving system reliability. • Optimized Payments domain Java APIs to sustain 40,000 requests per second across multi-region PostgreSQL and Redis infrastructure on AWS, configuring PgBouncer transacti
  • Cohere
    Full-Stack Software Engineer
    Cohere
    Aug 2021 - Jul 2023 (2 years)
    • Built end-to-end multi-tenant appointment scheduling platform in healthcare domain with React UI and Java Spring Boot backend against PostgreSQL, implementing row-level locking and Redis slot reservations to prevent double-booking under concurrent load. • Engineered integrations and Spring Boot starters for 30 plus clinic and lab record systems supporting HL7 and FHIR specifications, deploying each adapter behind LaunchDarkly feature flags with per-tenant progressive rollout. • Implemented field-level patient data masking on frontend and AWS KMS envelope encryption within JPA attribute converters with tenant-specific key management across patient-facing surfaces. • Reduced booking flow Largest Contentful Paint from 1.8 seconds to 320 mill
  • O
    Software Engineer
    Octobot (now Sparq)
    Jul 2019 - Jul 2021 (2 years 1 month)
    • Developed React UI components and corresponding Java Spring Boot API endpoints for catalog and merchandising services, collaborating with senior engineers to implement product specifications and API contracts. • Increased test coverage from 45 percent to over 85 percent on recommendation widgets and backend APIs using Jest, React Testing Library, JUnit, and MockMvc following test-driven development practices. • Debugged and resolved Redis cache-stampede issue causing intermittent 5xx errors on storefront API during nightly catalog updates by implementing single-flight cache wrapper pattern. • Migrated CI pipelines for two microservices from Jenkins to GitLab CI under platform engineering guidance and documented migration pattern for broad
  • Revelo
    Junior Software Engineer
    Revelo
    Jul 2017 - Jun 2019 (2 years)
    • Built React components for lesson content and interactive quizzes increasing completion rates from 48 percent to 69 percent through gamification and progress tracking mechanisms. • Developed Java Spring Boot microservices for student authentication and course progression with PostgreSQL backend, implementing JWT-based security and role-based access control patterns. • Created automated code evaluation system for programming assignments providing detailed feedback within 2 seconds of submission using isolated execution containers.
Education verified_user 0% verified
  • University of Sao Paulo
    Bachelor's degree in Computer Science
    University of Sao Paulo
    Oct 2013 - Jun 2017 (3 years 9 months)