Senior Software Engineer (Platform & Backend)

Alongside is a Portuguese company that partners with international organizations to build and scale exceptional tech teams.
Our client is a fast-growing SaaS company transforming the automotive dealership experience by automating administrative processes, streamlining sales workflows, and ensuring compliance.
They are looking for a highly experienced Senior Software Engineer (Platform & Backend) to join their fully remote team. This is a hands-on engineering role for someone who enjoys solving complex technical challenges, taking ownership of architecture, and leading technical initiatives across the entire stack.
This is not a people management role . Instead, you’ll act as a technical leader, driving architecture, owning critical parts of the platform, and leading projects from design through production.
Responsabilities:

- Own and evolve major parts of the application architecture.

- Design, build and maintain scalable software across backend, frontend and infrastructure.

- Lead technical projects from design through production.

- Make architectural decisions and drive technical direction.

- Build and operate production systems with a strong focus on reliability, scalability and performance.

- Review code and promote engineering best practices.

- Troubleshoot production issues and improve platform resilience.

- Collaborate closely with product and engineering teams to deliver high-impact features.
Requirements

- Extensive experience building and scaling SaaS products.

- Strong expertise in TypeScript , with solid experience across backend, frontend and cloud infrastructure .

- Strong backend engineering experience.

- Experience operating and maintaining production infrastructure in cloud environments.

- Proven experience designing software architecture and leading technical projects.

- Previous experience as a Tech Lead, Staff Engineer, Principal Engineer or Senior Software Engineer with architectural ownership .

- Comfortable working across the full stack and taking ownership from infrastructure through backend to frontend.

- Experience with AWS, Pulumi, Bun, React, Vite, GraphQL, PostgreSQL and Redis is a plus.

- Excellent communication skills and the ability to work autonomously in a fast-paced startup environment.
Benefits

- Fully remote , based in Portugal.

- Salary range: 50k – 80k per year