Lead Full Stack Engineer - Users & Auth (Ingeniero/a Lead Full Stack - Usuarios y Autenticación) - Hybrid

13 days ago

São Paulo, BrazilStaff+

Responsibilities

Own partner and customer integration delivery from qualification, scoping, and build through handoff.
Run qualification assessments covering systems, data flows, risk, and implementation approach.
Build and configure integration connectors, data mappings, and partner adapters.
Act as the primary technical contact for partner technical teams and coordinate with Platform/API squads.
Ensure integrations meet standards for idempotency, observability, secrets management, data minimization, and sandbox testing.
Prepare runbooks, dashboards, on-call assignments, and support playbooks for handoff.
Identify reusable integration patterns and contribute them to shared libraries or platform configuration.

4+ years of backend software development experience with hands-on API integrations, webhooks, and data mapping.
Experience working directly with external partners and end customers in a technical capacity.
Ability to design solutions from scratch and own customer relationships and delivery.
Deep knowledge of REST, event-driven architectures, OAuth/token management, and idempotency.
Strong proficiency in one or more backend languages, preferably Java, and comfort across multiple systems and technology stacks.
Working knowledge of logs, metrics, tracing, alerting, and SLOs.
Experience with integration platforms or connector frameworks such as N8N, Zapier, or custom-built equivalents.
Working proficiency in English and Spanish, or English and Portuguese.
Preferred qualifications include fintech, payments, or financial data infrastructure experience; PCI/PII and compliance familiarity; and AWS, Kafka, or event-streaming experience.
Proficiency in Portuguese, Spanish, and English is a strong plus.

Competitive salary and stock options through ESOP from day one.
Annual learning budget and internal accelerated development paths.
Flexible vacation.
Hybrid work model with time split among the office, customer visits, and working from home; no minimum office-day requirement for most roles, though office presence is expected during ramp-up or when required.
Multicultural team with daily exposure to Portuguese, Spanish, and English.

501-1,000 employees