{"id":3767037,"url":"https://alion.io/job/mirage-software-engineer-ai-developer-platform","title":"Software Engineer, AI Developer Platform","company":{"id":6327,"name":"Mirage","domain":"mirage.app","url":"https://alion.io/company/mirage","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":175000,"max":300000,"currency":"USD","period":"year","gross":null,"usd_annual":300000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"CI/CD","optional":false},{"name":"Least Privilege","optional":false},{"name":"LLM","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"Multimodal AI","optional":false}],"status":"live","first_seen_at":"2026-11-04T16:50:05Z","employer_posted_date":"2026-11-04","last_verified_at":"2026-11-07T00:30:41Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Mirage is an AI video company focused on making creation dramatically easier. Our team tackles some of the hardest creative and technical challenges in generative media.\nWe get to rethink how people collaborate with AI that can actually do creative work with them-defining entirely new interaction paradigms for AI-native video tools. We make that possible by building multimodal agents that turn creative direction into edits, rendering engines that composite multiple layers of video and graphics, and generative video models trained from the ground up that create new media when needed.\nAll of this comes together in Captions, our creative workspace for generating, editing, and designing video. The technology behind Captions is now available more broadly: Tesseract gives any AI agent native video-editing capabilities, while developers can integrate our models into their own products through APIs.\nExplore our work\nCaptions - Our flagship creative workspace \nTesseract - Our professional video engine for AI agents \nResearch - The foundation models we build in-house \nUpdates - The latest from Mirage \nTechCrunch, Forbes, Fast Company - Press\nOur Investors\nWe’re very fortunate to have some the best investors and entrepreneurs backing us, including Index Ventures, Kleiner Perkins, Sequoia Capital, Andreessen Horowitz, General Catalyst, Uncommon Projects, Kevin Systrom, Mike Krieger, Lenny Rachitsky, Antoine Martin, Julie Zhuo, Ben Rubin, Jaren Glover, SVAngel, 20VC, Ludlow Ventures, Chapter One, and more.\nPlease note that most of our roles will require you to be in-person at our NYC HQ (located in Union Square) \nAbout the role\nMirage is hiring a backend engineer to rebuild how we ship software as AI agents dramatically increase the volume of code we produce. You’ll own the path from commit to production, ensuring our build, test, review, deployment, and security systems help engineers and their agents ship quickly and safely.\nYou’ll treat our development infrastructure like a product-working directly with engineers to understand friction, measure bottlenecks, and build tools they want to use. You’ll also ship features across our AI video products and developer platform, grounding those improvements in firsthand experience.\nWhile we don’t use hierarchical titles or levels internally, we are currently hiring engineers who have operated at senior or staff+ scope.\nResponsibilities\nShip features alongside product engineers across our video creation software, video rendering engine, and developer platform, identifying where our development systems slow them down\n\nTurn those insights into tools, agents, and streamlined workflows that engineers choose because they’re the fastest way to ship\n\nRebuild CI/CD to support 100x the change volume through fast incremental builds, test selection, automated flaky-test detection and quarantine, merge queues, and preview environments\n\nMake deployments safe by default through progressive rollouts, automated canary analysis, feature flags, and automatic rollback, catching bad changes within minutes before they affect users\n\nOwn the environments coding agents work in, including sandboxes, ephemeral stacks, and the tooling agents need to build, test, and verify their own work\n\nBuild an AI review pipeline with agent reviewers tuned to our codebase, risk-based routing that directs risky changes to humans, and automated policy checks that gate merges\n\nRun continuous, agent-driven penetration testing against our applications, APIs, and infrastructure, moving beyond point-in-time annual audits and turning findings into pull requests with proposed fixes\n\nIntegrate security into the development pipeline through secrets, dependency, and supply-chain scanning, AI-assisted vulnerability triage, and automatically generated fix PRs\n\nSecure agents’ access to code, infrastructure, and data through least-privilege permissions, short-lived credentials, sandboxing, audit logs, and prompt-injection guardrails\n\nMeasure and improve the development lifecycle, with early priorities including reducing PR-to-production time as weekly merged PRs grow 10x, replacing long-lived credentials in CI and agent environments, and driving flaky tests close to zero through automated detection, quarantine, and fix PRs\n\nWhat Makes You a Great Fit\n5+ years of professional experience building backend or full-stack software, with a track record of shipping high-impact products or systems end-to-end\n\nStrong product sense-you’ve shipped things users love and bring that same attention to engineers and agents as users of your systems\n\nHands-on experience with CI/CD, cloud infrastructure, or security, and the drive to go deep; specialists and product engineers ready to specialize are both welcome\n\nExtensive use of coding agents in your current work, with informed opinions about where they break\n\nStrong security instincts, including thinking through how a system could be attacked while you’re building it\n\nA practical, measurement-driven approach-you measure before you fix and would rather ship an effective solution this week than wait a quarter for a perfect one\n\nComfort owning build, deployment, review, and security together, working across layers and defining a roadmap where no playbook exists\n\nAn interest in staying close to product, shipping to production every week, and using firsthand experience to guide infrastructure improvements\n\nA preference for making the right path easy to follow through useful tools and thoughtful defaults\n\nEven better if...\nYou’re a product engineer who keeps getting pulled into build, deployment, or security problems and wants to make that your focus\n\nYou’ve built internal developer platforms or productivity tooling at a fast-growing startup\n\nYou have offensive security experience, including penetration testing, red-teaming, bug bounties, or CTFs\n\nYou’ve shipped LLM agents or evaluations that run in production\n\nYou’ve worked with merge queues, monorepo tooling, or test-impact analysis\n\nYou’ve been a startup founder or an early engineer at one\n\nBenefits:\nComprehensive medical, dental, and vision plans\n\n401K with employer match\n\nCommuter Benefits\n\nCatered lunch multiple days per week\n\nDinner stipend every night if you're working late and want a bite!\n\nGrubhub subscription\n\nHealth & Wellness Perks\n\nMultiple team offsites per year with team events every month\n\nGenerous PTO policy\n\nCaptions provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.\nPlease note benefits apply to full time employees 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