Senior Software Engineer, AI Infrastructure - Developer Tooling

Senior Software Engineer, AI Infrastructure - Developer ToolingResponsibilitiesAbout the Team We're building the AI-powered backbone of our developer tools. You'll work on three core systems: a retrieval infrastructure powering our AI products, a coding agent that assists users in writing code, and the evaluation frameworks that measure their effectiveness.Retrieval Systems (RAG Infrastructure)Design and scale retrieval pipelines including vector search, BM25, and hybrid retrieval strategiesBuild and optimize embedding pipelines, chunking strategies, and re-ranking systemsDevelop query understanding and rewriting components to improve retrieval relevanceManage vector database infrastructure at production scaleCoding Agent DevelopmentBuild agent architectures that support multi-step code generation, refactoring, debugging, and diagnosticsImplement tool-use patterns (function calling, code execution sandboxing, file system interaction)Develop context management strategies for long-form code understandingEvaluation & BenchmarkingDesign and maintain evaluation frameworks for retrieval quality and agent task completionBuild custom benchmark suites for real-world coding task assessmentCreate reproducible testing infrastructure with automated regression detectionQualificationsMinimum QualificationsBachelor's degree in CS, EE, or related field (or equivalent experience)4+ years of software engineering experienceStrong proficiency in Python (primary) and TypeScript/JavaScriptExperience with at least one systems-level language (C++, Rust, Go)Practical experience integrating LLMs into applications (prompt engineering, context management, output parsing)Understanding of agent patterns: tool use, multi-turn reasoning, error recoveryFamiliarity with code-specific LLM tasks (generation, summarization, analysis)Preferred QualificationsMaster's or Ph.D. in Computer Science, Machine Learning, or related fieldContributions to open-source developer tooling, retrieval systems, or coding assistantsExperience with AST parsing, code analysis tools, or language serversFamiliarity with rendering pipelines or cross-platform framework architectureExperience deploying and optimizing ML models in production (latency, cost, reliability)Job InformationThe base salary range for this position in the selected city is $212800 - $387600 annually.Compensation may vary outside of this range depending on a number of factors, including a candidate's qualifications, skills, competencies and experience, and location. Base pay is one part of the Total Package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and restricted stock units.Benefits may vary depending on the nature of employment and the country work location. Employees have day one access to medical, dental, and vision insurance, a 401(k) savings plan with company match, paid parental leave, short-term and long-term disability coverage, life insurance, wellbeing benefits, among others. Employees also receive 10 paid holidays per year, 10 paid sick days per year and 17 days of Paid Personal Time (prorated upon hire with increasing accruals by tenure).The Company reserves the right to modify or change these benefits programs at any time, with or without notice.About UsFounded in 2012, ByteDance's mission is to inspire creativity and enrich life. With a suite of more than a dozen products, including TikTok, Lemon8, CapCut and Pico as well as platforms specific to the China market, including Toutiao, Douyin, and Xigua, ByteDance has made it easier and more fun for people to connect with, consume, and create content.Why Join ByteDanceInspiring creativity is at the core of ByteDance's mission. Our innovative products are built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and enrich life - a mission we work towards every day.As ByteDancers, we strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our Company, and our users. When we create and grow together, the possibilities are limitless. Join us.Diversity & InclusionByteDance is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At ByteDance, our mission is to inspire creativity and enrich life. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.Reasonable AccommodationByteDance is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at https://tinyurl.com/RA-request