Sr. Backend Software Engineer, Labs

About the Role 

At Pax8 Labs, we’re inventing the future of how businesses interact with autonomous technology—not just making AI possible, but making it practical, intuitive, and transformative. As a Backend Engineer, you’ll design and create the core infrastructure that powers human-guided AI workflows, enabling real-time orchestration and seamless integration across diverse environments. 

This is greenfield engineering in an innovation hub where speed, experimentation, and bold ideas drive everything we do. You’ll work on today’s hardest backend challenges while helping define the foundation for future projects and breakthrough technologies—from new interaction models to entirely new product lines. 

If you’re passionate about pioneering technology and want to help build a culture of innovation and future-focused projects, we want you—even if you don’t check every box. Diverse perspectives fuel our breakthroughs, so bring your curiosity and creativity. 

What You’ll Do 

• Design and build scalable backend services, APIs, and orchestration systems for coordinating AI-driven workflows across complex, multi-agent business processes. 

• Develop data pipelines, state management, and real-time communication for dynamic workflows. 

• Design and optimize infrastructure for scalability and reliability, including container orchestration, cloud deployments, and observability (monitoring, logging). 

• Contribute to SaaS platform architecture with modularity and extensibility in mind, building reusable frameworks that accelerate future projects. 

• Integrate and optimize AI/ML models in production, ensuring performance and reliability at scale. 

• Shape team culture by championing experimentation and knowledge sharing, collaborating in a small team focused on rapid learning and innovation. 

Labs Culture & Work Style 

• Modern Development: Embrace AI tools where they add genuine value, from coding assistance to automated testing 

• Async-First Communication: Thoughtful documentation (Slack, Notion, Loom), with focused in-person collaboration 1-3 days per week in our Denver office 

• Build-Measure-Learn:  We learn through iteration and support each other in experimentation 

Who We’re Looking For 

• Experience in backend languages such as Go, Python, Rust, Kotlin, or TypeScript (we value skill over years) 

• Proven ability to design and build robust, scalable APIs (REST, GraphQL, or gRPC) for complex systems 

• Deep knowledge of cloud-native architectures, containerization (Docker, Kubernetes), and microservices 

• Hands-on experience with one or more major cloud platforms such as Azure, AWS, or GCP, including managed services and deployment best practices 

• Extensive experience with databases, caching, message queues, and event-driven architectures 

Other Qualities We Value 

• Proficiency with modern DevOps practices, CI/CD pipelines, and infrastructure-as-code (Terraform) 

• Strong system design and architecture skills with focus on scalability and reliability 

• Experience debugging complex distributed systems and performance optimization 

• Adaptable and excited to work in an environment that values rapid learning and iteration. 

• Commitment to code quality, comprehensive testing, and operational excellence 

• Enthusiasm for AI/ML advancements and backend infrastructure innovations 

• Understanding of autonomous agent architectures and coordination patterns preferred 

• Experience with agent frameworks, workflow orchestration, or distributed coordination systems preferred, but not required 

• Degree or equivalent practical experience in Computer Science, Engineering, or related field 

What Success Looks Like 

First 90 Days: Help build initial prototypes and innovate, establish development practices, and integrate successfully with the team 

First Year: Deliver robust, scalable agent systems that validate core technical hypotheses and support rapid product iteration 

Our Values 

• Compassionate Candor - Assist others with candid, actionable feedback 

• Seek to Understand - Be open, curious and committed to learning 

• We Before Me - Collaborate and seek diverse perspectives for Team Pax8 wins 

• Do What You Say - Take ownership, honor commitments, prioritize and deliver 

• Light Up Learning - Try new ideas, be vulnerable, share failures for collective learning 

• Driven by Passion - Connect personal passion to Pax8 mission, stay resilient 

Why Join Pax8 Labs 

• Technical Challenge: Build distributed systems that coordinate autonomous agents at scale, solving novel problems in agent orchestration and system reliability 

• Pioneering Territory: Work at the forefront of agent technology in a rapidly evolving space 

• Massive Scale: Your code will reach thousands of partners through Pax8's established marketplace platform 

• Greenfield Engineering: Build systems from scratch with modern technologies and no legacy constraints 

• Strong Backing: Executive support and autonomy to build breakthrough technology 

• Exceptional Team: Work alongside our Technical Fellow, Engineering Manager, and experienced product and design professionals 

Compensation:

Pax8 Labs is committed to building a diverse and inclusive team. We welcome applications from all qualified candidates regardless of race, gender, age, religion, sexual orientation, or disability status. 

Perks:

Why Join Pax8?

Because here, success isn't just about numbers—it’s about impact.
It’s about being part of a team that thinks bigger, empowers each other, and never loses sight of why we do what we do: to make the cloud easier, more accessible, and more meaningful.

At Pax8 we believe that your Total Rewards should include a benefits package that shows how much we value our greatest assets. All FTE Pax8 people enjoy the following benefits:

• Non-Commissioned Bonus Plans or Variable Commission

• 401(k) plan with employer match

• Medical, Dental & Vision Insurance

• Employee Assistance Program

• Employer Paid Short & Long Term Disability, Life and AD&D Insurance

• Flexible, Open Vacation

• Paid Sick Time Off

• Extended Leave for Life events

• RTD Eco Pass (For local Colorado Employees)

• Career Development Programs

• Stock Option Eligibility

• Employee-led Resource Groups

Please take a moment to review our Proprietary Rights and Non-Competition Agreement — this document outlines important information about your rights and responsibilities if you join our team.

Pax8 is an EEOC Employer.

Equal Opportunities

Pax8 is an equal opportunities employer and welcome individuals who are in possession of the appropriate requirements to work within the country the role is based in. Offered individuals will be asked to undertake identity, security compliance and reference checks. Your privacy is important to us. Your data will be held in accordance with Data Privacy best practices and processed only in accordance with our recruiting processes.

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