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Get AI-powered advice on this job and more exclusive features. We are looking for a curious and performance-minded Software Engineer to help build the next generation of intelligent Integrated Development Environments (IDEs) for semiconductor design engineers. You will work at the intersection of developer experience, language tooling, and agentic AI integration to create a fast, responsive, and deeply intuitive development environment that other engineers in the semiconductor field would love. Your work will enable advanced features like real-time code intelligence, LLM-assisted agentic workflows, and low-latency editing at scale, empowering developers to write, navigate, and refactor code with confidence and speed. Core Responsibilities: Design and implement the underlying architecture of a modular, extensible code editor and development environment Integrate with Language Server Protocol (LSP), Tree-sitter, and AST-based systems to enable fast and accurate code analysis Build intelligent features such as autocomplete, go-to-definition, find-references, inline documentation, and context-aware suggestions Optimize performance of the editor through smart diffing, debouncing, incremental parsing, caching, and multi-threading Implement systems for plugin extensibility, file system management, and project awareness Collaborate with AI and backend teams to integrate large language models for inline completions, chat, code transformation, and summarization Required Skills & Experience: 5+ years of experience developing modern software tools or IDEs Strong programming skills in TypeScript, Python, Go, or C++ Deep familiarity with editor architecture, especially Monaco (VS Code), Tree-sitter, or similar frameworks Experience with Language Server Protocol (LSP), AST parsing, and semantic code navigation Experience integrating or building plugin systems and command registries Solid understanding of developer workflows, devtools, and source control systems Nice to Have: Familiarity with embedding models, token caching, or AI-powered refactoring tools Prior experience contributing to open-source editors or developer platforms What We Offer: Opportunity to shape the technical direction of a disruptive AI startup Competitive compensation package including equity High-caliber, talented collaborators from diverse disciplines Collaborative and innovative startup culture Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Industries Software Development and Semiconductor Manufacturing Referrals increase your chances of interviewing at Cognichip Inc. by 2x Inferred from the description for this job Medical insurance Vision insurance 401(k) Get notified about new Software Engineer jobs in Redwood City, CA . Software Engineer, Early Career 2025 Start San Francisco, CA $130,000.00-$238,000.00 4 days ago Software Engineer, AI Intern (Summer 2025) Software Engineer Frontend (Multiple Levels) - Slack Software Engineer, AI Platform - New Grad Software Engineer I (Full Time) United States San Jose, CA $98,600.00-$125,900.00 2 weeks ago San Francisco, CA $130,000.00-$190,000.00 4 days ago San Francisco, CA $170,000.00-$270,000.00 2 weeks ago San Francisco, CA $170,000.00-$250,000.00 2 weeks ago San Francisco, CA $112,000.00-$160,000.00 10 hours ago San Francisco, CA $56.25-$173,000.00 5 days ago San Francisco, CA $99,500.00-$200,000.00 8 hours ago Software Engineer, Frontend (All Levels) San Francisco, CA $150,000.00-$220,000.00 1 day ago New Grads 2025 - Software Engineer, Algorithm San Jose, CA $120,000.00-$165,000.00 8 months ago San Francisco, CA $150,000.00-$176,000.00 3 weeks ago San Francisco, CA $170,000.00-$270,000.00 2 weeks ago San Francisco, CA $120,000.00-$190,000.00 6 months ago Software Engineer 4 - TV & Web Player Platform Software Engineer - Fullstack, Mountain View Software Engineer I (Intern) United States San Jose, CA $44,000.00-$130,000.00 1 week ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr