João Maia Senior Software Engineer with +7 YOE

Software Engineer

Filljoy

Oct 2023 - Current (2 years 9 months)

Working closely with the CEO to maintain and create new projects from scratch, from infra on GCP to publishing the apps on Shopify App Store, mostly apps developed using ReactJS with Typescript on frontend, and Express with Typescript on backend, handled many third-party API migrations within the Shopify ecosystem, also launched a few IOT projects including golang micro-services for digital scales and routers. Also helping with designing the Company's roadmap and next projects.

Senior Software Security Engineer

Filljoy

Oct 2023 - Current (2 years 9 months)

• Led the full-scale refactor of the core Shopify application, migrating legacy logic to TypeScript and GCP, which slashed support tickets by 40% and improved page load performance by 40% for high-volume merchant stores. • Developed and launched custom Shopify apps for marketplace sellers, currently powering operations for 50+ multi-location retail stores.

Senior Software Engineer

Alice

Aug 2022 - Sep 2023 (1 year 2 months)

• Architected backend infrastructure supporting 50+ hospitals, enabling real-time health data processing and reducing data delivery latency for analytics. • Worked with data analysis team on developing data schemas for analysis, enabled data analysis on health outcomes per medical protocol.

Software Engineer

Alice

Jun 2021 - Aug 2022 (1 year 3 months)

• Scaled core application from 10 to 500+ daily active users, re-architecting legacy bottlenecks to handle a 50x increase in traffic while maintaining uptime quality. • Standardized monitoring and alerting practices across the squad, reducing manual incident investigation time.

Software Engineer

Zapay Pagamentos

Jan 2019 - Jun 2021 (2 years 6 months)

• Architected the integration layer for the company’s primary third-party partner, processing a large part of total revenue. • Developed a greenfield sales application that directly contributed to a 10% increase in company-wide sales volume. • Engineered the company’s primary B2B API, which became the backbone for integrations with major Brazilian fintechs. • Optimized B2B API services, reducing P99 latency by 30% and ensuring system stability during peak traffic periods.

João Maia

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