Staff Software Engineer

Beacon Software is a permanent capital holding company which acquires and grows essential businesses. We are a profitable series B+ firm that combines great technologists, operators and M&A professionals to accelerate the scale of the ambition of the dozens of businesses we own and operate. We are supported by capital from tier-1 venture capital, crossover, and endowment investors as well as the founders of the leading technology companies from the past decade. We are growing our team in Toronto, San Francisco, and New York. Apply below. Software Engineer We’re looking for a versatile Software Engineer to drive technical innovation and accelerate growth across our portfolio of software companies. You’ll collaborate closely with product, design, and leadership teams within our portfolio companies to solve high-impact problems across diverse architectures, tech stacks, and industries. You'll learn how to design and execute large-scale software modernization efforts with AI, build new AI-powered features, re-imagine the product experience. You’ll have direct influence on revenue, customer experience, product vision, and technical direction—bridging code with commercial impact. This is a hands-on, high-impact role ideal for a full-stack engineer or ex-founder who thrives in fast-paced, entrepreneurial environments. Key Responsibilities Deploy into Beacon portfolio companies to identify, design, and deliver high-impact technical initiatives. Analyze portfolio company codebases to identify value creation opportunities and technical debt reduction strategies. Refactor, modernize, and scale existing systems using current best practices and frameworks. Build AI-powered features and products that drive measurable business growth. Architect scalable backend and API services (Node.js, Python, Go, Ruby, etc.). Develop modern, performant frontends using React, Next.js, and TypeScript. Collaborate with product and business leaders to translate commercial goals into technical roadmaps. Contribute to internal engineering playbooks and best practices across Beacon’s platform. Mentor and support technical teams within portfolio companies to lift engineering standards What We’re Looking For 5+ years of experience as a full-stack or backend engineer, ideally in a startup or high-growth environment. Strong foundation in software engineering best practices, including code quality, testing, and deployment Command of one or more modern programming languages (e.g., Python, Go, TypeScript, Ruby). Experience with cloud infrastructure and modern DevOps practices. Comfort working across diverse architectures—from monoliths to microservices. Curiosity and versatility to dive into unfamiliar codebases and domains Familiarity with AI integration, LLMs, and data-driven applications. Strong systems-thinking mindset and a bias for simplicity. Proven ability to deliver autonomously with high ownership. Excellent communication skills and collaborative spirit. Commercial mindset, curiosity about business models, and how software creates enterprise value. Desire to grow into a technical leader or founder role. This Role Is Perfect for You If You’re an ex-founder or founding engineer who thrives in ambiguity. You want to build and ship products across multiple industries. You’re fascinated by how code translates into profit and growth. You enjoy diving into new codebases, diagnosing bottlenecks, and scaling systems. You believe AI will reshape how software is built—and you want to be at the forefront. You care deeply about clean, maintainable, and scalable engineering. You want to learn how to acquire, operate, and scale software businesses. You’re commercially curious—just as excited by go-to-market strategy as by refactoring a service. You’re energized by speed, autonomy, and a culture that values judgment over process. You want to work with people who set a high bar—and help you raise yours. Our Values at Beacon Software Humility : We acknowledge that the path to