Product Engineer Porto

Overview

Siena is the first intelligence layer for customer experience. We’re creating an operating system of AI agents that learn, remember, and act across every customer touchpoint—from support conversations to shopping experiences to voice and social media interactions. We’re building agents that don’t just respond to customers—they remember them, learn from every interaction, and connect experiences across channels.

We’re a small, distributed team that emphasizes impact, speed, and collaboration. If you’re excited about building something that doesn’t exist yet, read on.

What you’ll do

• Build new agent capabilities
  -
  - end and make them work seamlessly across platforms
• Translate messy customer workflows into elegant product features and deployment opportunities
• Design and ship evaluation and QA systems that improve agent performance over time
• Expand our integrations ecosystem by shipping new platforms and enterprise connections
• Own platform automation and onboarding to help customers go live in days, not weeks
• Work across multiple initiatives at once, balancing speed with thoughtful
  - offs
• Partner with product, design, and leadership to shape what gets built—and what doesn’t

What you’ll need

• 3+ years of software engineering experience building technical B2B products, ideally in CX,
  - commerce, or AI automation
• AI-native mindset — you already use tools like Claude, Cursor, v0, or Chat
  GPT daily to build and ship faster
• Full-stack fluency — React, Type
  Script, Node. js, APIs, integrations, data modeling
• Comfort working directly with clients and solving complex,
  - world problems
• Curiosity and a builder’s DNA — you like figuring things out, not just following specs
• Product judgment — you’re able to build product with agency and autonomy

Why Siena?

• Meaningful impact. Your work directly shapes our product and company.
• Globally distributed team working at the bleeding edge of CX and AI.
• Great salary plus the opportunity for equity or stock grants.
• Learning budget. If you’re growing, so are we.
• The thrill of building something new. Join us at a stage where your contributions matter most.
• AI-fluency. Make AI your second nature.
• Tackle unsolved problems. We’re redefining how customer experience will look like in the next decades.

Our values

The people who thrive here are curious,
- obsessed, and take ownership without being asked. They fix problems first and explain later. They’re direct about feedback—both giving and receiving it—because they care more about getting things right than being polite. They maintain high standards while moving at startup speed, and they build real relationships with teammates because they know that’s how great work gets done. When things get tough, they adapt and keep pushing forward.

Our approach to AI

The people who thrive here treat AI like a natural extension of themselves. They’ve built their own ecosystem of agents—some for research, others for debugging, writing, analysis, or writing code. They know which AI works best for what problem. Everyone gets premium accounts plus a quarterly budget for new tools. Demo days showcase clever workflows, and knowledge is shared through Slack threads and collaborative learning.

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.

Equality statement. 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.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Engineering and Information Technology
• Industries: Technology, Information and Internet