Senior Software Engineer

We’re entering a phase of rapid product and infrastructure scaling. To support this growth, we’re hiring a Senior Software Engineer who will help define the technical foundations of our platform, shaping everything from backend architecture to product performance and developer experience.

This is a hands-on, high-ownership role for someone who wants to build the core technology that enables the world’s most advanced materials to be developed and manufactured. You’ll have the freedom to make architectural decisions, work closely with scientists and engineers, and see your code directly power breakthroughs in industry and research.

This role reports directly to our and offers a significant degree of autonomy and influence over technical decisions and product direction.

A snapshot of your first 6 months at Polaron

• Month 1 – Understand and Contribute
  • Quickly develop a deep understanding of our product, systems, and users
  • Deliver incremental improvements to our product or platform
  • Share early insights to help shape technical and product decisions
• Month 3 – Take Ownership
  • Lead the design and delivery of an end-to-end feature that provides clear customer value
  • Collaborate cross-functionally with ML and product teams to turn complex ideas into working software
  • Support and mentor junior engineers through code reviews, pairing, and guidance
• Month 6 – Drive Impact
  • Demonstrate strong technical and product judgment, independently shaping and improving complex systems
  • Take ownership of key architectural areas or projects
  • Contribute to better engineering practices, tooling, and team efficiency

Requirements

You are an experienced engineer who loves building robust, elegant systems that serve real product needs.

• 5+ years’ experience as a product-focused software engineer.
• Experience writing well-tested, maintainable code in a statically-typed language (TypeScript, Go, Rust, Java/Scala…).
• Strong fundamentals in API design, database modeling, scalability, and system performance.
• Experience deploying and maintaining systems on AWS, using tools such as Terraform, Docker, and Kubernetes.
• The ability to work across the stack when needed but with a clear backend focus (data, APIs, infra).
• Excellent communication skills: you can explain complex technical concepts with clarity.

Bonus points for:

• Experience building high-performance canvas or visualization interfaces (D3, Observable Plot).
• Exposure to PyTorch or machine-learning pipelines.
• Knowledge of on-prem or hybrid cloud deployments.

Mindset and values

• Is product-oriented: you care about impact, not just elegant code.
• Is scientifically curious and thrives on complex, technical challenges.
• Works with low ego and collaborates transparently.
• Enjoys autonomy but knows when to ask questions and seek alignment.
• Has a long-term mindset: ready to help build a company, not just a product.
• Communicates openly and values shared learning.