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Tasks and Responsibilities
Show originalWe are a B2B SaaS platform serving solar energy integrators across Brazil: plant monitoring, CRM, payments, and a WhatsApp messaging product built on the official API. We are launching new initiatives in Node/NestJS and are looking for someone to own this foundation from the ground up—not just to "pick up tickets," but to decide how it will be built.
What you will do
- Build new services in Node/NestJS from scratch: data modeling, contracts, queues, observability, deployment, and on-call responsibilities.
- Make architecture decisions for a multi-tenant system with unstable third-party integrations—resilience, idempotency, and retry mechanisms are part of the daily routine.
- Elevate the team's technical level: review code, define standards, mentor mid-level and junior developers, and advocate for quality without blocking delivery.
- Participate in product discussions with direct access to the CTO and business context; we expect you to challenge scope, not just implement.
- Get hands-on with infrastructure when needed, including Kubernetes.
What we are looking for
- Extensive backend trajectory—practically, 8+ years writing software in production, with solid experience in Node/TypeScript and NestJS.
- Experience building a product from scratch in a startup environment and dealing with the long-term consequences of your own technical choices.
- Hands-on technical leadership profile: leads by technical reference, not by agenda management.
- Platform mindset: thinks about multi-tenancy, infrastructure costs, third-party limits, data migration, gradual rollouts, and incidents outside business hours.
- Ability to investigate problems end-to-end, correlating logs, network, database, and third-party APIs.
- Clear written communication and a habit of documenting technical decisions.
Differentials
- Experience with messaging systems at scale, such as WhatsApp Business API and CPaaS.
- Comfortable in a polyglot ecosystem—part of the core is Java/Spring, and you will interact with it.
- Experience operating GCP in production.
- Technical English for reading and documentation.
Selection Process
- Initial conversation with HR (~30 min) — context, expectations, background, and salary alignment.
- Technical interview with a real system design exercise from our product, no whiteboard algorithms.
- Conversation about leadership and career trajectory.
- Job offer.
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