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Software Engineer – IDE & DevTools (AI-Powered) – Toronto (Hybrid)

Are you passionate about building developer tools that empower engineers? Do you want to work on the cutting edge of AI, language tooling, and semiconductor design?

We’re hiring a hands-on Software Engineer to join the founding engineering team of an AI-native SaaS startup revolutionizing semiconductor design. You’ll help build an intelligent, high-performance Integrated Development Environment (IDE) that transforms how semiconductor engineers write, navigate, and refactor code.

A modular, extensible IDE using Monaco (VS Code), Tree-sitter, Language Server Protocol (LSP), and AST-based analysis

Intelligent features like autocomplete, go-to-definition, inline docs, and context-aware suggestions

LLM-powered capabilities including inline completions, chat, code transformation, and summarization

Plugin and extension systems, file/project awareness, and editor performance optimization

Architect and implement advanced code editor and tooling features

Collaborate with AI/ML and backend teams to integrate large language models into developer workflows

Optimize editor performance through smart diffing, incremental parsing, caching, and multithreading

Design and maintain plugin systems and developer extension frameworks

4+ years developing developer tools, IDEs, language tooling, or related software

Strong hands-on experience in TypeScript, Python, Go, or C++

Deep familiarity with editor architectures, especially Monaco, Tree-sitter, or similar frameworks

Experience with Language Server Protocol (LSP), AST parsing, and semantic code navigation

Built or maintained plugin/extension systems, command registries, or similar

Solid understanding of developer workflows, version control, and extensibility

Experience integrating LLMs (OpenAI, Claude, DeepSeek, etc.) into developer workflows

Knowledge of embeddings, token caching, or AI-powered code refactoring

Open-source contributions to IDEs, devtools, or language tooling

Have you built or contributed to IDEs or extensions (e.g., VS Code plugins)?

Have you contributed to any open-source projects?

Are you proficient in TypeScript, Python, Go, or C++?

Do you understand how editors like Monaco or Tree-sitter work under the hood?

Have you worked with LSP, AST parsing, or developer code navigation tools?

Have you built plugin or command registry systems?

If you answered yes to most, we want to hear from you!

Be a founding engineer in a fast-growing AI SaaS startup shaping semiconductor design

Work directly with the VP of Software and collaborate with Silicon Valley HQ

Influence product and team strategy with leadership growth potential

Competitive salary + early equity in a high-impact startup

Flexible hybrid work environment with a low-ego, high-trust culture

Interested? Send me a message or apply directly below. Tag someone who would be perfect for this!

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Apply: sasha@talenttohire.com | 416-833-3533

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