{"id":99608,"url":"https://alion.io/job/synack-software-engineer-ai-level-determined-by-experience-2","title":"Software Engineer, AI (Level determined by experience)","company":{"id":38833,"name":"Synack","domain":"synack.net","url":"https://alion.io/company/synack","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"C","score":64,"open_postings":10,"ghost_share":0.6,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-17T05:46:00Z"}},"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":"explicit","locations":["United Kingdom"],"countries":["GB"],"hiring_countries":["GB"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":106000,"max_usd":198000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":29},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Apache Kafka","optional":false},{"name":"Docker","optional":false},{"name":"FedRAMP","optional":false},{"name":"Function Calling","optional":false},{"name":"GCP","optional":false},{"name":"Kubernetes","optional":false},{"name":"LangGraph","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Python","optional":false},{"name":"RAG","optional":false},{"name":"Tool Use","optional":false},{"name":"LangChain","optional":true},{"name":"Red Teaming","optional":true}],"status":"live","first_seen_at":"2026-07-14T17:14:47Z","employer_posted_date":"2026-09-15","last_verified_at":"2026-10-17T23:02:09Z","board_verified":true,"closed_at":null,"days_open":95,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":94},"description":"Synack’s Penetration Testing as a Service platform manages customers’ attack surfaces by discovering new assets, pentesting for critical vulnerabilities and gaining visibility into the root causes of security risks. We are committed to making the world more secure by harnessing a talented, vetted community of security researchers to deliver continuous penetration testing and vulnerability management, with actionable results. Synack's PTaaS platform has uncovered more than 71,000 exploitable vulnerabilities to date, protecting a growing list of Global 2000 customers and U.S. agencies in a FedRAMP Moderate Authorized environment. For more information, please visit www.synack.com.\nWe are looking for a Senior Software Engineer (AI), where you'll design and ship AI agents that plan, reason, drive security tooling and surface exploitable vulnerabilities, running autonomously inside sandboxed environments. It's a hands-on senior role spanning applied AI and cybersecurity. You'll own systems end to end and raise the technical bar for the team around you.\nSounds interesting? Keep reading…\nPlease note: This is a remote position based in the UK. We can only hire citizens of the United Kingdom for this role. Given the nature of the work, the role may be subject to nationality, residency and security-clearance checks.\nHere’s what you'll do\nBuild AI agents that automate penetration testing: planning, tool use, reasoning over findings, and acting safely within scope.\nStand up and run the sandboxed cyber-lab and range infrastructure, containerised on Kubernetes, where these agents execute offensive tooling.\nShip features from ideation through production, including evals, guardrails and monitoring.\nImprove how our agents work: prompting, tool orchestration, evaluation, and cost.\nLead code reviews and design sessions, and help the engineers around you grow.\nWork closely with our security researchers to translate how they hack into how our agents operate.\nHere’s what you’ll need\n4+ years of software engineering experience\nProven ability to build and scale production systems\nStrong Python, polyglot codebase\nFluent or willing to learn Go\nHands-on experience building and operating production AI applications using LLMs and agentic frameworks (e.g., RAG, MCP, LangGraph or similar), including tool integration, prompt design, evaluation, guardrails, and token/cost optimization.\nDemonstrate ability to create reliable agents (prompting, evaluation, guardrails, understanding of token and cost optimization\nCapable leveraging Docker, Kubernetes, isolated sandbox, cloud experience GCP preferred\nBrings a disciplined testing approach to microservices gPRC, API design, async messaging (Pub/Sub, Kafka)\nPassionate desire to understand how systems get compromised\nClear communication\nCollaborative ability to partner across teams\nNice To Have\nOffensive security experience: penetration testing, red teaming, CTF, or security tooling.\nExperience driving security tools programmatically or automating an attack chain.\nStartup experience, where scope is broad and priorities move fast.\nReady to join us?\nSynack is committed to embracing diversity. Our people are our strength. Each addition to our team is an opportunity to grow and diversify our ideas, experiences, and viewpoints. We strive to be inclusive of Race, Ethnicity, Religion, Sex, LGBTQ+, Veterans, Disabilities, and Age. Synack welcomes you!\nAs a candidate, Synack cares about your privacy. Please view our candidate privacy policy.\nThis position has responsibility to ensure Synack’s security and privacy posture is maintained.\nSalary is determined by a combination of factors including location, level, relevant experience, and skills. The compensation package for this position may also include equity, and benefits. \nFor more details about our benefits, please see our benefits overview. Then for the Employer code, enter: synack","description_format":"text","description_chars":3906,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Penetration Testing","Vulnerability Management"],"lifecycle":[{"event":"open","at":"2026-07-14T17:14:47Z"}],"visa":[],"liveness":{"score":6,"band":"cold","label":"Long shot","p_open":1,"p_active":0.215,"p_room":0.28,"age_days":94,"expected_fill_days":29,"reasons":["conf:2","stale_co","ghost","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/synack-software-engineer-ai-level-determined-by-experience-2","json_url":"https://alion.io/job/synack-software-engineer-ai-level-determined-by-experience-2.json","meta":{"generated_at":"2026-10-17T23:49:13Z","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":2230,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":38833},"rest":"https://alion.io/mcp/rest/get_company?id=38833"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsynack-software-engineer-ai-level-determined-by-experience-2"},{"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%2Fsynack-software-engineer-ai-level-determined-by-experience-2"},{"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%2Fsynack-software-engineer-ai-level-determined-by-experience-2"},{"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/synack-software-engineer-ai-level-determined-by-experience-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsynack-software-engineer-ai-level-determined-by-experience-2"}]}