Staff Full-Stack Engineer - Data Intensive Web-Applications - Personalization

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Full-Stack Engineer - Data Intensive Web-Applications - Personalization based in Brazil.

• This is a Staff-level, hands-on engineering role focused on building and operating data-intensive web applications and personalization capabilities.
• You will develop backend services, APIs, analytical data access layers, and authentication systems that power commercial intelligence and data-driven decision-making.
• The role combines backend depth with full-stack ownership, allowing you to take features from design through production and into ongoing operation.
• You will work on distributed systems where performance, reliability, observability, scalability, and cost efficiency are treated as core product requirements.
• The position sits within a lean team of experienced engineers, with opportunities to influence technical standards through design, code review, pairing, and evidence-based decisions.
• You will integrate applications with internal services, analytical platforms, and AI or agent-based services while handling complex distributed-system challenges.
• This opportunity is ideal for a strong technical builder who enjoys owning production systems end to end and using modern engineering practices to deliver high-impact products.