{"id":2773,"url":"https://alion.io/job/cresta-ai-senior-software-engineer-backend-ai-agent-runtime","title":"Senior Software Engineer, Backend (AI Agent Runtime)","company":{"id":34,"name":"Cresta","domain":"cresta.com","url":"https://alion.io/company/cresta-ai","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":83,"open_postings":87,"ghost_share":0.207,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":143,"computed_at":"2026-10-29T05:49:05Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Canada"],"countries":["CA"],"hiring_countries":["CA"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":104000,"max_usd":193000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":111},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Go","optional":false},{"name":"Kubernetes","optional":false},{"name":"LLM","optional":false},{"name":"Python","optional":false},{"name":"Vertex AI","optional":false},{"name":"GitOps","optional":true},{"name":"RAG","optional":true}],"status":"live","first_seen_at":"2025-05-06T19:44:30Z","employer_posted_date":"2026-10-19","last_verified_at":"2026-10-29T14:41:03Z","board_verified":true,"closed_at":null,"days_open":540,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":540},"description":"Cresta unlocks the true potential of the customer experience, turning every conversation into a competitive advantage. Cresta’s unified AI platform combines conversational AI agents, real-time human agent augmentation, and comprehensive conversation intelligence to drive revenue and efficiency gains across every channel. The world’s leading companies, including United Airlines, Cox Communications, and Marriott, use Cresta to power world-class customer experiences every day. \nBorn from the Stanford AI Lab, Cresta has raised more than $270 million from the world’s leading investors, including a16z, Greylock, and Sequoia. Cresta’s leadership includes some of the leading minds in AI today. Our CEO, Ping Wu, founded and led Google's Contact Center AI and Vertex AI platforms before joining Cresta to build the future of AI-driven customer experiences.\nOver the next few years, AI is going to redefine how people all over the world interact with businesses every day. Come build that future at Cresta.\nAbout the role\nBuild real-time AI agent infrastructure: Design and operate the stateful, low-latency runtime that powers voice and chat AI agents - from LLM streaming and conversation state management to graceful recovery and multi-channel support.\nSolve distributed systems problems: Own session management across scaled-out workers - including affinity, checkpointing, crash recovery, and consistency under concurrent access.\nBuild a function execution platform: Own a serverless-style runtime where customers deploy custom logic - build orchestration, container lifecycle, autoscaling, and versioned rollouts.\nOwn developer experience and test infrastructure: Build CLI tools, local development environments, and test execution frameworks that let engineers iterate quickly and ship with confidence.\nRaise the bar on production quality: Drive observability, incident response, and engineering best practices across the team.\nWhat we’re looking for\n5+ years of software engineering experience, with meaningful time spent on infrastructure, platform, or systems work.\nStrong Python and Go - both are core to this role, not one primary and one secondary.\nDeep understanding of distributed systems: consistency, fault tolerance, state management, concurrency.\nExperience with Kubernetes and cloud-native infrastructure.\nExperience building developer-facing tooling - CLIs, SDKs, local dev environments, or internal platforms.\nStrong communicator who can drive technical decisions, write clear design docs, and mentor others.\nHigh bar for code quality - thorough testing, thoughtful code review, and sustainable engineering practices.\nComfort operating what you build - on-call, incident response, and production ownership.\nAI-native workflow - you actively use LLMs and AI-assisted tools in your daily development, and can leverage them to move faster and tackle problems that would otherwise be impractical.\nNice-to-haves\nExperience with real-time voice or streaming media systems.\nHands-on with LLM integration - streaming inference, prompt orchestration, retrieval-augmented generation.\nExperience building serverless or function-as-a-service platforms.\n Workflow engines (Temporal, Argo, Airflow) for durable, long-running processes.\nExperience in conversational AI or speech domains.\nInfrastructure-as-code and GitOps workflows.\nPerks & Benefits:\nWe offer Cresta employees a variety of medical, dental, and vision plans, designed to fit you and your family’s needs\nPaid parental leave to support you and your family\nMonthly Health & Wellness allowance\nWork from home office stipend to help you succeed in a remote environment\nLunch reimbursement for in-office employees \nPTO: 3 weeks in Canada \nCompensation for this position includes a base salary, equity, and a variety of benefits. Actual base salaries will be based on candidate-specific factors, including experience, skillset, and location, and local minimum pay requirements as applicable. We are actively hiring for this role in the US and Canada. Your recruiter can provide further details.\nOur use of AI in recruiting: We may use AI tools in our recruiting process, which require human review and oversight. If you have questions about our use of AI or wish to opt out, please contact  (if you are opting out, please use the subject ‘Opt-Out’ in your email).\n\nRecording & AI transcription: We do not authorize candidates to record or use AI transcription of any interview by phone, notetaker app, AI glasses, or other device. Candidates may request an exception or accommodation for review during the interview process as needed.\n\nRecruiting impersonation scams: We have noticed a rise in recruiting impersonations across the industry, where scammers attempt to access candidates' personal and financial information through fake interviews and offers. All Cresta recruiting email communications will always come from the @cresta.ai domain. 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