Senior Backend Software Engineer | AI Engine

We are hiring a Senior Backend Software Engineer in our CARE - AI Engine team in Brazil ! This is a Remote – Brazil position, meaning you can work from anywhere within the country. Please note that this role is only open to candidates 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; Own quality, latency, and cost; 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; Push back when something doesn't add up; 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 where everyone feels comfortable taking care of themselves, taking time off, and finding work-life wellness

Requirements

Strong communicator, written and verbal, with technical and non-technical audiences; Critical thinker; No ego; Proactive; Collaborative across product, design, data science, and engineering; 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 Python, microservices, and distributed systems are mandatory

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

Wellhub: 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 plan; Wellz: emotional wellbeing program with personalized journeys that combine individual therapy sessions (52 per year) and on-demand content; Healthcare: health, dental, and life insurance; Flexible work: hybrid and remote options; Home office reimbursement; Flexible schedule; Paid time off: vacations after 6 months and additional 3 days off per year + 1 day off for each year of tenure (up to 5 additional days) + an extra holiday for your birthday; Paid parental leave: 100% paid parental leave to all new parents; Parents giving birth are eligible for extended leave and a ramp-back period; Career growth: access world-class platforms, participate in interactive sessions, build personalized development roadmap, and explore internal opportunities; Culture: join a team of passionate people who come together to break boundaries, support each other, and create a meaningful impact in workplace wellness