Senior Backend Engineer (Remote)

JR Spain; Barcelona; A distancia; EUR 60.000 - 80.000; Jornada completa

Descripción de la vacante

A pioneering technology company in Barcelona is seeking an experienced Senior Backend Engineer to develop and enhance their autonomous customer service platform. As part of a remote team, you will own projects, mentor team members, and contribute to architecture decisions. Candidates should have over 5 years of backend experience, preferably with NodeJS and AWS. This role offers a competitive salary, stock options, and a fully remote work culture.

Servicios

Competitive salary and stock options

Fully remote work culture

Flexible hours

Unlimited paid time off

Educational budgets and training programs

Formación

• 5+ years of backend experience, preferably with NodeJS, Typescript, Express.
• Familiar with AWS (EKS, ECS, Fargate).
• Experience with Postgres or similar databases.
• Know CI/CD tools like GitLab, Github, Jenkins.
• Driven and thrive in fast-paced environments.

Responsabilidades

• Own projects end-to-end as a senior backend engineer.
• Develop new products or improve existing features.
• Mentor and lead other team members.
• Unblock team members and solve problems efficiently.

Conocimientos

Backend experience

NodeJS

Typescript

AWS

Postgres

CI/CD tools

Descripción del empleo

Social network you want to login/join with:

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Client:

Siena AI

Location:

Barcelona, Spain

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

42060865126321356832460

Job Views:

1

Posted:

23.07.2025

Expiry Date:

06.09.2025

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Job Description:

At Siena, we are pioneering the development of the world's first autonomous customer service platform, leveraging artificial intelligence to enable machines to engage in useful and complex conversations. Our platform is designed to work out-of-the-box to effectively solve customer problems across all digital channels. Siena uses advanced natural language processing techniques to communicate naturally with customers and promptly answer questions, utilizing conversation redirecting algorithms to develop a human + AI operating model. This results in significant reductions in ticket backlogs, improved customer experience, better management of unpredictable conversation volumes, and increased agent capacity for high-empathy cases.

If you're excited about artificial intelligence and human-to-machine communication, and want to be part of a remote team driving innovation and impact, join us in pushing the boundaries of AI and CX performance.

Team and culture:

• Product-driven: Building a best-in-class product powering millions of brands.
• Ownership: We do meaningful work and own it 100%. Sharing wins and taking responsibility is key.
• Autonomy: Unblock yourself, search for answers, and make decisions within scope.
• Customer-first: Focused on understanding and optimizing for our customers.
• Impact: Small squad, big mission to improve ecommerce.
• Open & thoughtful communication: Prefer async work, deep focus, and minimal meetings.

The role & responsibilities:

• Own projects end-to-end as a senior backend engineer, taking ownership of new and existing features.
• Contribute ideas and feedback from roadmap to architecture.
• Develop and collaborate closely with the Product team.
• Build new products or improve existing features (80% of time).
• Mentor and lead other team members (about 20% of time).
• Unblock team members and solve problems efficiently.

Join us if you:

• Have 5+ years of backend experience, preferably with NodeJS, Typescript, Express.
• Are familiar with AWS (EKS, ECS, Fargate).
• Have experience with Postgres or similar databases.
• Know CI/CD tools like GitLab, Github, Jenkins.
• Are product-focused with microservices architecture skills.
• Are driven, focused, and thrive in fast-paced environments.

Bonus points for:

• Scaling system knowledge.
• Experience in startups from seed to exit.
• Remote team experience.

Benefits:

• Competitive salary and stock options.
• Fully remote work culture.
• Flexible hours and unlimited paid time off.
• Educational budgets and training programs.

Why join Siena?

• Growth opportunities and impactful work.
• Ownership, autonomy, and low ego culture.
• Learn from talented teammates.
• Help make ecommerce more human.

Life at Siena can be a roller coaster, but challenges bring growth. Enjoy the flexibility of working from anywhere, designing your day, and taking time off when needed.