Senior Backend Software Engineer | AI Engine

Your wellbeing, our mission. Join a company shaping a healthier world. GET TO KNOW US At Wellhub we're revolutionizing workplace wellness. Our platform connects employees worldwide to the best partners for fitness, mindfulness, therapy, nutrition, and sleep—all in one simple subscription. Headquartered in NYC with team members in Europe, North America and South America, we’re on a mission to make every company a wellness company. We believe work should be fulfilling, inspiring, and balanced. Here, you’ll find a team that values wellbeing, collaboration, and different perspectives, where passion and creativity push boundaries to create real impact. Your contributions will help shape a healthier, more balanced world for you and millions of people globally. Join us in redefining the future of wellbeing! THE OPPORTUNITY 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. 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. WHAT WE OFFER YOU With thoughtful benefits, emotional wellbeing resources, and a culture that empowers you to take ownership of your role and your wellbeing, we create an environment where you can thrive in all dimensions of your life. Our flexible benefits program allows you to customize some of the benefits, according to your needs! Our benefits include: WELLHUB: Free Gold+ membership with access to onsite gyms and studios, digital fitness programs, and online wellness resources for meditation, nutrition, mental wellbeing support, and more! Add up to three family members to your plan, ensuring access to wellness for those who matter most to you. WELLZ: A complete emotional wellbeing program with a unique approach. It offers personalized journeys that combine individual therapy sessions (52 per year) and on-demand content. HEALTHCARE: Health, dental, and life insurance. FLEXIBLE WORK: As a Flexible First company, we offer hybrid and remote options to give you the freedom to work in a way that suits you. The model for this specific role can be discussed with your recruiter and hiring manager. When you join, use our home office reimbursement to set up your home office. FLEXIBLE SCHEDULE: Flexibility for us isn’t just about where we work—it also means being able to shape how and when we get things done. Together with their leaders, employees define schedules that align with their time zones, team needs, and personal routines. PAID TIME OFF: It’s important to take time away from work to recharge.Employees receive 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: Welcoming a new child is one of the most special moments in your life. Take the time to be present and enjoy your growing family. We offer 100% paid parental leave to all new parents. Parents giving birth are eligible for an extended leave and a ramp-back period to return part-time while they get settled. CAREER GROWTH: Access world-class platforms, participate in interactive sessions, build your personalized development roadmap, and explore internal opportunities. We focus on continuous learning and feedback to support your journey toward personal and professional success. CULTURE: You’ll join a team of passionate people who come together to break boundaries, support each other, and create a meaningful impact in workplace wellness. We win together, building trust through open communication and a culture where every perspective matters. Learn more about our shared culture and values here. And to get a glimpse of life at Wellhub… Follow us on Instagram @lifeatwellhub and LinkedIn ! Diversity, Equity, and Belonging at Wellhub We aim to create a collaborative, supportive, and inclusive space where everyone knows they belong. Wellhub is committed to creating a diverse work environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, sex, gender identity or expression, sexual orientation, age, non-disqualifying physical or mental disability, national origin, veteran status, or any other basis covered by appropriate law. Our commitment to inclusion also extends to how we recognize and reward our people. We’re proud to be Syndio Fair Pay Certified, reflecting our ongoing dedication to equitable and fair pay practices across our global team. Read more about it here. Questions on how we treat your personal data? See our Aviso de Privacidade para Candidatos. #LI-REMOTE