Dedicated and innovative Software Engineer with a strong academic background in Computer Science and Systems Analysis and Development. Proven experience in developing and maintaining highly complex front-end, back-end, and mobile applications. A technical reference and leader in software projects, with expertise in modern technologies such as React, Next.js, React Native, Node.js, AWS Services, and Testing. Passionate about delivering efficient and scalable solutions, while proactively optimizing systems and designing new products.
🧾 https://github.com/jtiagosantos
📞 (93) 992423295
🔗 https://www.linkedin.com/in/josetiagosantosdelima/?locale=en_US
Mid-level Software Engineer | Acquisition Team
Worked as a Back-end Software Engineer at a healthcare company, delivering solutions for medical students, residents, and physicians. I am part of the team responsible for handling the payment checkouts across all company products. I contributed to the main Q3 initiative to implement a new checkout flow for a new product launch. Since this checkout is designed to become the single, unified checkout for all products, gradually replacing existing ones, the main challenge was to build a solution from scratch capable of covering all current use cases. The existing checkouts operate under different contexts, acquisition models, and product-specific flows. The goal was to deliver a solution that is scalable, flexible enough to support future products, and maintains a high standard of engineering quality. Throughout this initiative, I participated in technical refinements, trade-off discussions, and decision-making processes. I was directly involved in task planning alongside the team, as well as in the hands-on implementation. At the checkout engineering level, we adopted a custom architecture based on the Vertical Slice approach, combined with principles from DDD and SOLID. All implemented features were covered by unit and/or integration tests, achieving a high test coverage. Additionally, I introduced observability across multiple services using OpenTelemetry, including structured logs, metrics, custom traces, alerts, and dashboards with Signoz.
Mid-level Software Engineer | Payments Lifecycle
Worked as a Back-end Software Engineer at a company in the healthcare sector, delivering solutions for medical students, residents, and physicians. I am part of a cross-functional payments team, responsible for the entire transaction lifecycle across the company’s products — from initial acquisition and subscription recurrence mechanisms to integration with the financial ERP. I implemented significant improvements to the store’s search filters, resulting in a faster and more efficient experience for sellers. I restructured the API responsible for these filters, replacing a single, hard-to-maintain parameter with isolated parameters with clear responsibilities, greatly improving the Developer Experience. Additionally, I added full test coverage, increasing reliability and enabling safer future enhancements. I contributed to the main Q2 initiative to resolve critical issues in the integration of financial titles with the ERP system. I developed a complete proof of concept (POC) to validate the solution, authored RFC documents, and participated in technical refinements, trade-off analysis, and implementation decisions. We implemented an asynchronous workflow based on BullMQ and the Transactional Outbox pattern, ensuring reliable orchestration and consistent event consumption. I also added observability across multiple services using OpenTelemetry, including structured logging, metrics, custom traces, alerts, and dashboards with Signoz and New Relic. As a result, we increased the integration success rate from under 50% to over 98%.
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