Senior Backend Software Engineer | CARE - Engagement & Platform

THE OPPORTUNITY

We are hiring a Senior Backend Software Engineer to join our CARE - Engagement & Platform 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.

YOUR IMPACT

As a Senior Backend Software Engineer on the AI Engine team, you will

• Design and ship AI-powered features end to end. You 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.

WHO YOU ARE

• Strong communicator, written and verbal, with technical and non-technical audiences.
• Critical thinker. You question assumptions instead of nodding along.
• No ego. Comfortable saying "I don't know" and going to find out.
• Proactive. You notice things that should be better and fix them without being asked.
• Collaborative across product, design, data science, and engineering.

WHAT YOU NEED

• Strong Python and a track record of shipping and operating production backends.
• Solid AWS, including serverless (Lambda).
• SQL and NoSQL (DynamoDB, OpenSearch, Postgres). you understand access patterns and where things fall over.
• APIs you've actually 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.

BONUS POINTS

• 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.

We recognize that individuals approach job applications differently. We strongly encourage all aspiring applicants to go for it, even if they don't match the job description 100%. We welcome your application and will be delighted to explore if you could be a great fit for our team. For this specific role, please note that experience working with Kotlin, Golang, or Java, microservices, and distributed systems are mandatory requirements.