About
Calvin Soares
Software engineer working across the stack, with experience in CRM, SaaS and payment platforms, improving products, integrations and critical flows.
My current focus is architecture, back-end and the technical decisions that connect reliability, scale and user experience.
Focus
Distributed systems
Stack
React, Node.js, Java/Spring
Delivery
Product, architecture and scale
01
Sistemas que permanecem claros quando o contexto fica complexo.
02
Decisões técnicas guiadas por produto, não por tendência.
03
Integrações críticas desenhadas para falhar bem.
04
Interfaces que tornam operações e dados compreensíveis.
<Calvin />
Full Stack Engineer
Available for full stack, architecture and technical leadership challenges
How I add value
Architecture
I design solutions that prioritize scalability, maintainability and resilience.
Back-end
I work with Node.js and Java/Spring on APIs, authentication, webhooks, payments and critical business rules.
Delivery
I connect product, engineering and UX to turn requirements into reliable software.
Featured experience
PagLemon
Senior Tech Lead
A payment platform connected to the PIX ecosystem, with charge creation, QR code generation and status updates through postbacks and webhooks. The work focused on stronger operational reliability, less checkout friction and better transaction traceability.
My Expertise
Skills
