[Hiring] Senior Backend Software Engineer | AI Engine @Wellhub

Role Description

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.

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.

Qualifications

• 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.

Requirements

• 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.

Benefits

• Free Gold+ membership with access to onsite gyms and studios, digital fitness programs, and online wellness resources.
• A complete emotional wellbeing program with personalized journeys that combine individual therapy sessions (52 per year) and on-demand content.
• Health, dental, and life insurance.
• Flexible work options to give you the freedom to work in a way that suits you.
• Flexibility in shaping how and when we get things done.
• Paid time off after 6 months, 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.
• 100% paid parental leave to all new parents, with extended leave for parents giving birth.
• Access to world-class platforms, interactive sessions, and personalized development roadmap.
• A culture that empowers you to take ownership of your role and wellbeing.