Senior Backend Engineer (Node.js + AWS)

About Siena

Siena is building enterprise empathic AI Agents powered by reasoning-adept LLMs. Siena is the first AI Agent of its kind, designed to integrate with existing systems and interact with customers across multiple channels from a single, unified platform.

If you're excited about the intersection of human-to-machine communication and want to be part of a team driving innovation and making a real impact in automating agentic workflows, join us on our mission to revolutionize customer experience through empathetic AI.

Some of our values

We're not big on corporate-speak, but here's what matters to us:

• Curiosity and creativity: You always seek new knowledge, ask questions, and explore different perspectives to deepen your understanding.
• Customer empathy: You are driven by our customers’ success. You see needs they can’t articulate.
• Resilience: You bounce back from setbacks, adapt to change, and thrive in the face of challenges.
• Ownership and autonomy: When things break, you fix first, explain later.
• Relationships: You create bonds with your colleagues - building trust and sharing success.
• Craft and speed: You balance vision with pragmatism. Your standards pull everyone higher.
• Open and direct: You share and receive feedback. You are open about what’s working and what not.

The role & what you'll be doing:

In the role of senior backend engineer, you own projects end to end. Ownership is yours - take over new and existing product features.

• You'll contribute with ideas and constructive feedback to the product's development from the roadmap all the way to architecture.
• You'll develop and collaborate closely with the Product team to slice and dice scope and deliver piece by piece.
• Building products: 80% of time by building new software products, or improve existing features.
• Mentorship: you have the ability to mentor and lead other members about 20% of time if you have an appetence for it.
• Problem-solving: you unblock yourself and other team members when they hit a roadblock.

Join the team if you:

• Have previous experience working on the backend for 4+ years - ideally with NodeJS, Typescript & Express
• Are familiar with the AWS cloud system. (EKS, ECS, Fargate)
• Have experience working with Postgres (or similar)
• Have experience with CI/CD (GitLab, Github, Jenkins or similar)
• You are product-focused and have the ability to build microservices products by understanding the business and customers.
• You have the drive and focus to get challenging projects over the finish line while meeting deadlines.
• You love solving problems and writing elegant code.
• You are proud of your microservices architecture skills. But don't like to brag.
• You thrive in a fast-paced environment.

We're not aiming for expert levels in Node.js, but rather cross-language minded engineers that view and use stacks as problem-solving tools, not the solution.

Impress us even further:

• You have a high degree of technical knowledge around scaling systems.
• You have been in a startup from Seed to exit.
• You have experience working in remote teams.

Why Joins Us

We're a startup. We can't offer you fancy offices or extra perks. But here's what we can offer:

• Real impact. Your work will directly shape our product and company.
• A seat at the table. In a small team, every voice matters. Yours will be heard.
• Freedom to work your way. Home, coffee shop, moon base - if you're productive, we're happy.
• Top pay. Competitive salary and an opportunity for equity or stock grants.
• Time off when you need it. Take at least 15 days. More if you need it.
• Budget to keep learning. Because if you're not growing, we're not growing.
• The chance to build something from the ground up. This is the time when what you do has the biggest impact.
• Problems worth solving. We're reshaping how work gets done.

At Siena, we’re not just looking for people who can do a job. We’re looking for people who want to break boundaries, create the future, and reshape industries. If that’s you, we look forward to your application.

Siena provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetics, sexual orientation, gender identity, or gender expression. We are committed to a diverse and inclusive workforce and welcome people from all backgrounds, experiences, perspectives, and abilities.