Senior Backend Software Engineer | AI Engine

We are hiring a Senior Backend Software Engineer in our CARE - AI Engine team in Brazil! We build AI-powered backend services that put LLMs in front of real users. We need a senior engineer who can ship them and keep them reliable, observable, and fast in production.

Responsibilities

Design and ship AI-powered features end to end; Build backend services and APIs that hold up under real load; Instrument what you ship, watch the numbers, fix what's wrong; Review code and designs critically; Help taking prompt, retrieval, and agent changes from experiment to production; Live the mission: inspire and empower others by genuinely caring for your own wellbeing and your colleagues; Bring wellbeing to the forefront of work and create a supportive environment

Requirements

Strong Python and a track record of shipping and operating production backends; Solid AWS, including serverless (Lambda); SQL and NoSQL (DynamoDB, OpenSearch, Postgres); APIs designed, integrated, and monitored in production; Event-driven systems (Kafka, SQS); Production observability: metrics, logs, traces, alerts (Grafana, Prometheus, OpenTelemetry); Comfort with distributed systems and loosely-scoped problems; Experience working with Kotlin, Golang, or Java; Microservices; Distributed systems; Strong communicator, written and verbal, with technical and non-technical audiences; Critical thinker; No ego; Proactive; Collaborative across product, design, data science, and engineering

Nice to have

Strong SQL and some data pipeline experience (e.g., Airflow); Experience with LLM-based systems in production. Evaluation, prompts, retrieval, agentic workflows; AI coding tools (Cursor, Claude Code, GitHub Copilot); Kotlin, Go, or Java for cross-team work

Benefits

Free Gold+ membership with access to onsite gyms and studios, digital fitness programs, and online wellness resources; Add up to three family members to your wellness plan; WELLZ emotional wellbeing program with 52 individual therapy sessions per year and on-demand content; Health, dental, and life insurance; Flexible work with hybrid and remote options; Home office reimbursement; Flexible schedule defined with leaders; Paid time off including vacations after 6 months, additional 3 days off per year, 1 day off per year of tenure up to 5 additional days, and an extra holiday for your birthday; 100% paid parental leave to all new parents, with extended leave and ramp-back period for parents giving birth; Career growth opportunities with world-class platforms, personalized development roadmap, and internal opportunities; Culture of passionate people, collaboration, and meaningful impact