Principal Software Engineer

Invisible Technologies makes AI work. Our end‑to‑end AI platform structures messy data, automates digital workflows, deploys agentic solutions, measures outcomes, and integrates human expertise where it matters most.

Our platform cleans, labels, and structures company data so it is ready for AI. It adapts models to each business and adds human expertise when needed, the same approach we have used to improve models for more than 80% of the world’s top AI companies, including Microsoft, AWS, and Cohere.

Our successes span industries, from supply chain automation for Swiss Gear to AI‑enabled naval simulations with SAIC, and validating NBA draft picks for the Charlotte Hornets.

Profitable for more than half a decade, Invisible reached $134M in revenue and ranked as the number two fastest growing AI company on the 2024 Inc. 5000. In September 2025, we raised $100M in growth capital to accelerate our mission of making AI actually work in the enterprise and to advance our platform technology.

We are seeking a highly skilled and driven Principal Software Engineer with a strong background in full‑stack development, particularly in backend technologies and Agentic AI, to join our AI/ML team. In this role, you’ll work at the intersection of engineering, data science, and real‑world impact, partnering directly with clients and internal stakeholders to design and deploy ML‑powered tools that solve meaningful problems.

This role combines hands‑on model development with robust backend engineering and infrastructure work. You’ll help build scalable systems, support R&D initiatives, and ensure rapid iteration and deployment of machine learning solutions in dynamic, production‑ready environments. You will work embedded with our top clients and the client teams to conduct use‑case discovery with senior stakeholders directly, and developing solutions that address complex client needs.

This will require being onsite with clients 3‑4 days a week on a regular basis in New York or London.

• Contribute as part of the Forward Deployed Engineering team during a phase of rapid growth focused on scaling models and improving platform performance. Help build backend systems, support client‑facing deployments, and enable smoother workflows for machine learning solutions.
• Develop and maintain AI/ML systems:
  Build robust, scalable backend systems that support machine learning operations and data processing pipelines.
• Cloud operations and management:
  Oversee and optimize cloud infrastructure to ensure efficient deployment and operation of ML models.
• Problem solving:
  Independently explore and address complex problem spaces to improve system capabilities and performance without extensive guidance.
• Cross‑functional collaboration:
  Work closely with ML engineers and data scientists to integrate advanced ML technologies, ensuring seamless operations across various platforms.
• Client engagement:
  Collaborate directly with Invisible’s clients, working embedded with client teams to support use‑case discovery, product development, and AI deployment.
• Innovation and R&D:
  Actively participate in research and development of new tools that can enhance our AI capabilities and workflows.

• 5+ years of software engineering experience, with a strong focus on ML engineering and deploying machine learning models in production.
• Extensive experience in full‑stack development, particularly in backend environments that support AI/ML workloads.
• Prior experience working directly with clients in use‑case discovery, product development, and leading client engagements.
• Technical expertise:
  Strong proficiency in Python, with deep expertise in LLMs, AI agents, and ML model development.
• Experience designing and deploying scalable ML systems, such as retrieval‑augmented generation (RAG) pipelines and production‑grade AI applications.
• Extensive experience with cloud platforms (AWS, GCP, Azure) and operational best practices for ML workloads.
• Familiarity with Kubernetes and other container‑management tools.
• Ability to write well‑structured, organized code and automated unit/E2E tests.
• Comfortable with polyglot persistence models (SQL vs. No
  
  SQL).…