{"id":3105780,"url":"https://alion.io/job/page-matrix-principal-engineer","title":"Principal Engineer","company":{"id":4430251,"name":"page - Matrix","domain":"matrix-ifs.com","url":"https://alion.io/company/matrix-ifs","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Comeet","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":116000,"max_usd":234000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1829},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"CI/CD","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"Agentic Workflows","optional":true},{"name":"Function Calling","optional":true},{"name":"LLM","optional":true},{"name":"RAG","optional":true}],"status":"live","first_seen_at":"2026-10-22T18:27:20Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-23T17:54:50Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Description\nPrincipal Engineer\nHands-On Technical Leadership | Full-Stack Engineering | AI-Driven Development\nPosition Summary\nWe are seeking an experienced, hands-on Principal Engineer to serve as the CTO’s technical right hand and help lead day-to-day engineering execution. This is a senior individual contributor role for a trusted technical leader who combines broad full-stack expertise, strong architectural judgment, and a pragmatic approach to building high-quality software.\nReporting directly to the CTO, you will take ownership of routine engineering decisions, guide technical implementation, review code, unblock developers, and maintain delivery momentum. You will act as the CTO’s technical deputy when needed, allowing the CTO to focus on strategic direction, product vision, and long-term technology priorities.\nA defining responsibility of this role is to establish AI-agent-assisted development as a core engineering practice. You will use AI coding agents across the software development lifecycle and help the team adopt effective practices for building, debugging, testing, and reviewing software with AI while maintaining high standards of quality and reliability.\nThis role is ideal for a technically versatile, low-ego engineer who thrives in ambiguity, takes ownership, and can balance architectural excellence with practical execution.\nKey Responsibilities\n1. Technical Leadership and CTO Partnership\nServe as the CTO’s technical deputy, owning routine engineering decisions and representing the CTO’s direction when needed.\nManage day-to-day engineering execution, including pull request reviews, technical approvals, developer support, and issue resolution.\nMaintain close alignment with the CTO through proactive communication, early escalation of risks, and transparent decision-making.\nChallenge assumptions constructively, evaluate trade-offs, and provide recommendations that improve technical and business outcomes.\n2. Architecture and Technical Direction\nContribute to architecture and system design decisions across the next-generation platform in partnership with the CTO and platform architect.\nEvaluate technical options and select solutions appropriate to current product requirements, operational needs, and anticipated growth.\nBalance maintainability, reliability, performance, and delivery speed without introducing unnecessary complexity.\nTranslate product and research requirements into practical technical approaches and actionable implementation plans.\n3. Hands-On Full-Stack Engineering\nDesign, build, debug, and maintain solutions across databases, backend services, frontend applications, cloud infrastructure, and DevOps.\nPrototype new capabilities, develop critical components, and step in wherever technical expertise is needed.\nLead by example through clean code, effective testing, sound engineering practices, and production-ready implementations.\nRemain actively involved in development rather than operating primarily as a people manager.\n4. AI-Agent-Assisted Development\nChampion the adoption of AI coding agents as a standard part of the engineering workflow.\nUse AI agents across the development lifecycle, including implementation, debugging, investigation, testing, code review, and infrastructure-related work.\nEstablish practical standards, workflows, and guardrails for effective agent usage, including context management, prompting, verification, security, and code quality.\nHelp engineers improve productivity and problem-solving effectiveness through responsible, effective AI-assisted development.\nEvaluate where AI agents can accelerate delivery and where human judgment, validation, or direct implementation remains essential.\n5. Engineering Standards and Delivery\nMaintain high standards for code quality, code reviews, automated testing, CI/CD, observability, and operational reliability.\nSupport both established systems and greenfield development initiatives.\nReduce key-person dependencies by improving documentation, knowledge sharing, and distributed ownership.\nIdentify delivery bottlenecks, resolve technical blockers, and keep engineering work progressing efficiently.\n6. Cross-Functional Collaboration\nPartner closely with the CTO, platform architect, engineering team, product, and research stakeholders.\nCommunicate technical decisions, trade-offs, dependencies, and risks clearly to technical and non-technical audiences.\nWork effectively across asynchronous and real-time collaboration environments.\nRequired Qualifications\nTechnical Expertise\n10+ years of software engineering experience, including senior-level experience as a Senior, Staff, or Principal Engineer.\nDemonstrated hands-on expertise across the full stack, including databases, backend development, frontend technologies, and cloud infrastructure or DevOps.\nStrong system design and architecture skills, with the ability to evaluate trade-offs and make pragmatic technical decisions.\nExperience building, debugging, testing, and maintaining production software across multiple technology layers.\nDemonstrated fluency with AI coding agents, using them regularly for software development and debugging across the stack.\nAbility to establish engineering practices that enable other developers to use AI agents effectively without compromising code quality, security, or reliability.\nTechnical Judgment and Ownership\nProven ability to operate independently with ambiguous requirements and limited supervision.\nStrong decision-making skills, with the confidence to make routine technical calls and the judgment to recognize when escalation is necessary.\nA pragmatic, outcome-oriented mindset that prioritizes effective solutions over unnecessary complexity.\nAbility to challenge technical decisions constructively and serve as a trusted partner to executive technical leadership.\nStrong ownership, accountability, integrity, and follow-through.\nCommunication and Collaboration\nExcellent written and verbal English communication skills.\nProactive communication habits, with an emphasis on transparency, early risk identification, and clear documentation.\nAbility to mentor and support engineers through technical guidance, code reviews, and knowledge sharing.\nAvailability to work full-time as an embedded team member, with at least three hours of daily overlap with U.S. Pacific morning hours.\nPreferred Qualifications\nExperience building LLM-powered applications, including retrieval-augmented generation (RAG), tool use, or agentic workflows.\nExperience establishing AI-assisted engineering standards or introducing AI development practices across a team.\nExperience working on early-stage products, next-generation platforms, or greenfield engineering initiatives.\nExperience working closely with a CTO or other senior technical leader in a high-trust, fast-moving environment.\nQualities of a Successful Candidate\nTrusted technical partner: Makes sound decisions, follows through, and operates with integrity.\nHands-on leader: Remains deeply involved in engineering while helping others succeed.\nPragmatic architect: Chooses solutions that meet real needs without unnecessary complexity.\nProactive problem-solver: Creates clarity in ambiguous situations and removes blockers before they slow the team down.\nAI-forward engineer: Treats AI agents as a practical force multiplier for individual and team productivity.\nCollaborative communicator: Keeps stakeholders informed, challenges ideas constructively, and avoids surprises.\nTeam multiplier: Shares knowledge, distributes ownership, and raises the effectiveness of the entire engineering organization.\nEducation\nBachelor’s degree in Computer Science, Engineering, or a related discipline, or equivalent practical experience.\nBroad knowledge of software engineering principles, modern development frameworks, cloud infrastructure, and emerging engineering practices is expected.\nWHY JOIN US\nMatrix is a global, dynamic, and fast-growing technology services and consulting company with over 17,000 employees worldwide. Founded in 2001, Matrix has grown through significant organic expansion and strategic acquisitions, executing some of the largest and most impactful technology projects in the market.\nWe specialize in the design, development, and implementation of advanced technologies, software solutions, and digital products. Our services include infrastructure and consulting, IT outsourcing and offshore delivery, training and assimilation programs, and acting as a trusted implementation and delivery partner for the world’s leading software vendors.\nWith deep expertise across both the private and public sectors-spanning Finance, Telecom, Healthcare, Hi-Tech, Education, Defense, and Security -Matrix serves a strong customer base in Israel alongside a continuously expanding global client portfolio.\nAt Matrix, our people are at the heart of our success. We are a community of talented, creative, and dedicated professionals who are passionate about innovation and excellence. We actively attract, develop, and retain top talent, recognizing that every employee’s contribution is critical to our continued growth and future success.\nMatrix’s success is built on a challenging and engaging work environment, competitive compensation and benefits, and meaningful career development opportunities. We foster a diverse, inclusive culture that encourages collaboration, continuous learning, and growth-together.\nJoin the winning team. Be challenged, grow your career, and enjoy the journey in a highly respected global organization.\nTo learn more, visit: www.matrix-ifs.com\nEQUAL OPPORTUNITY EMPLOYER: Matrix is an Equal Opportunity Employer and Prohibits Discrimination and Harassment of Any Kind. Matrix is committed to the principle of equal employment opportunity for all employees, providing employees with a work environment free of discrimination and harassment. All employment decisions at Matrix are based on business needs, job requirements, and individual qualifications, without regard to race, color, religion or belief, family or parental status, or any other status protected by the laws or regulations in our locations. Matrix will not tolerate discrimination or harassment based on any of these characteristics. Matrix encourages applicants of all ages.","description_format":"text","description_chars":10279,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":["Continuous learning"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Cybersecurity","Professional Services"],"lifecycle":[{"event":"open","at":"2026-10-22T19:07:34Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":23,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-23T05:54:15Z"},"pay":null,"html_url":"https://alion.io/job/page-matrix-principal-engineer","json_url":"https://alion.io/job/page-matrix-principal-engineer.json","meta":{"generated_at":"2026-10-23T18:00:46Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":27401,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-24T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":4430251},"rest":"https://alion.io/mcp/rest/get_company?id=4430251"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fpage-matrix-principal-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fpage-matrix-principal-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fpage-matrix-principal-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/page-matrix-principal-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fpage-matrix-principal-engineer"}]}