Senior Software Engineer

Join our team of founders, engineers, and innovators who are passionate about turning visionary ideas into successful ventures.

Work directly with founders to build products that solve real problems. Every project you work on has the potential to become the next breakthrough startup.

We embrace cutting-edge technology and AI-first development. You'll work with the latest tools and methodologies in a fast-paced, innovative environment.

Learn from experienced founders who've built and scaled multiple successful companies. Gain exposure to diverse industries and technologies.

Westlake, OH (Hybrid — 4 days/week in office)
• Full-time
• Engineering

K2 Venture Partners is a hands-on software development studio specializing in AI-first problem solving and zero-to-one product development, founded by serial entrepreneurs who've built dozens of products and sold multiple companies. We partner with early-stage companies to transform bold ideas into market-ready products, with a core focus on achieving product-market fit through rapid, traction-centric development.

We're looking for a Senior Software Engineer who's ready to work at the bleeding edge of AI, both building intelligent systems and creating AI-native tooling to build them.

You'll be a technical leader on a small, elite team where your decisions shape products from day one. You'll architect AI-powered systems that solve real problems, while simultaneously pushing the boundaries of how software gets built. We expect you to be fluent in modern AI development tools (Claude, Codex, Cursor, and whatever comes next) and constantly experimenting with new ways to amplify your output.

As a full-stack generalist with deep backend expertise, you'll own entire features end-to-end: from designing scalable APIs and data architectures to implementing sophisticated AI/RAG pipelines to polishing React interfaces. You'll work alongside our product team and directly with product owners, translating ambitious visions into elegant technical solutions and making the architecture calls that set products up for long-term success.

• Architect AI-native systems:
  Design and build intelligent applications powered by LLMs, RAG architectures, vector databases, and cutting-edge AI capabilities
• Lead technical decisions:
  Make critical calls on frameworks, infrastructure, and architecture patterns that shape product trajectories. You'll be a key technical voice in product decisions.
• Build at AI-augmented speed:
  Leverage K2's proprietary system, Meridian, as well as AI coding assistants, automated testing tools, and generative AI workflows to ship production-quality code faster than traditional approaches allow
• Own the full stack:
  Design scalable backend systems (APIs, databases, microservices) while maintaining the flexibility to deliver polished frontend experiences
• Drive AI tooling innovation:
  Experiment with and advocate for new AI-powered development tools; help define how our team builds software
• Mentor and elevate:
  Share knowledge across the team, conduct code reviews, and help establish engineering best practices
• Ship relentlessly:
  Write clean, maintainable code with comprehensive testing that enables rapid iteration without sacrificing quality

• 5+ years of professional software development experience shipping production systems at scale
• Deep backend expertise:
  You've designed and built robust APIs, scalable databases, and complex business logic. Proficient in Python (Django/FastAPI), Node.js, Go, or similar
• Strong AI/ML intuition:
  Hands-on experience building with LLMs, implementing RAG systems, or integrating AI capabilities into production applications
• Solid computer science fundamentals:
  Data structures, algorithms, system design. You can reason through complex technical problems and design elegant solutions
• AI-native development mindset:
  You actively use AI coding assistants (Claude, Codex, Cursor, and whatever comes next) and are excited about pushing the boundaries of AI-augmented development
• Full-stack capability:
  Comfortable building responsive interfaces in React/Type Script when needed
• Architectural…