Senior Software Engineer - Backend

Winnin; Brasil; Presencial; BRL 85 000 - 120 000; Tempo integral

Resumo da oferta

Winnin is seeking a passionate Software Engineer Backend to design and develop high-performance back-end services and database architectures. You'll work with cutting-edge technologies like NestJS, TypeScript, and PostgreSQL to build robust APIs and optimize performance.

Your role will involve event-driven communication, ensuring reliability through effective architectural decisions, while collaborating closely with front-end engineers. Join our mission to empower truck drivers by enhancing technology in the logistics sector.

Qualificações

• Solid experience with NestJS and the Node.js ecosystem.
• Strong TypeScript and object-oriented / clean-architecture fundamentals.
• Deep PostgreSQL knowledge: schema design, indexing, and query optimization.

Responsabilidades

• Design and evolve domain APIs in NestJS/TypeScript following a strict layered architecture.
• Build event-driven communication between services with Pub/Sub.
• Model and optimize PostgreSQL schemas and queries.

Conhecimentos

NestJS

TypeScript

PostgreSQL

Docker

Git

Descrição da oferta de emprego

About Us

At Billor, short for \"Bill of Rights,\" we are building the largest trucking ecosystem in the U.S., dedicated to supporting truck drivers. By combining FinTech, Technology, and Freight Management, we empower drivers to achieve truck ownership and a better quality of life. Our mission is rooted in freedom, responsibility, and efficiency, enabling drivers to maximize productivity and enjoy more time with their families.

About the role

We are looking for a Software Engineer Backend who is passionate about scalable architecture and efficient APIs. You will be responsible for designing, developing, and optimizing our back-end services and database architecture to ensure high performance and reliability.

Responsabilities

• Design and evolve domain APIs in NestJS/TypeScript following a strict layered architecture: thin controllers, business logic in the service layer, data access isolated in repositories.


• Build event-driven communication between services with Pub/Sub, using patterns like transactional outbox and idempotent consumers to guarantee reliability.


• Model and optimize PostgreSQL schemas and queries — proper types, indexing, and normalization decisions (when a field should really be a related table).


• Use Redis for caching and session data, with deliberate TTL and invalidation.


• Design clean, versioned REST contracts (plural resources, correct HTTP verbs and status codes, standardized JSON response envelopes).


• Implement authentication and authorization (SSO/JWT via a central gateway), always revalidating permissions on the server — never trusting the client.


• Collaborate with front-end/BFF engineers on typed, contract-first API interfaces.


• Write unit and integration tests as a first-class part of delivery.


• Participate in code and architecture reviews, and help make (and document) sound architectural decisions.

Qualifications

• Solid experience with NestJS and the Node.js ecosystem.


• Strong TypeScript and object-oriented / clean-architecture fundamentals (SOLID, separation of concerns, dependency inversion).


• Deep PostgreSQL knowledge: schema design, indexing, query optimization.


• Hands‑on experience with event-driven / message-based architectures (Pub/Sub, queues, or similar) — retries, idempotency, ordering.


• Comfort with layered / hexagonal service design and keeping business logic out of controllers and infrastructure.


• Experience designing and consuming REST APIs at scale (versioning, contracts).


• Authentication & authorization fundamentals (JWT, SSO, OAuth concepts).


• Docker and containerized deployments.


• Git and Agile workflows (Scrum/Kanban).


• Ability to write unit and integration tests to ensure reliability.