{"id":197633,"url":"https://alion.io/job/nubank-senior-security-engineer-ai-security","title":"Senior Security Engineer (AI Security)","company":{"id":13935,"name":"Nubank","domain":"nubank.com.br","url":"https://alion.io/company/nu-bank","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":98,"open_postings":16,"ghost_share":0,"stale_share":0,"repost_share":0.125,"time_to_fill_p50_days":37,"computed_at":"2026-10-30T05:48:23Z"}},"role":"Security","role_family":"Security","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["São Paulo, Brazil"],"countries":["BR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":58000,"max_usd":133000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":2372},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Machine Learning","optional":false},{"name":"OWASP","optional":false},{"name":"Python","optional":false},{"name":"Zero Trust","optional":false},{"name":"Ansible","optional":true},{"name":"AWS","optional":true},{"name":"Kubernetes","optional":true},{"name":"Model Context Protocol","optional":true},{"name":"PyTorch","optional":true},{"name":"TensorFlow","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-09-03T15:19:29Z","employer_posted_date":"2026-10-08","last_verified_at":"2026-10-30T05:01:58Z","board_verified":true,"closed_at":null,"days_open":56,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":55},"description":"About Nu\nNu serves more than 140 million customers, guided by a mission to fight complexity and empower people. The company has been leading an industry transformation through innovative products and human-centered services.\nProprietary technology and data at scale power Nu’s digital platform, built to promote financial access, advancement, and transparency. Its business model thrives on customer love and lower costs, feeding a flywheel of growth and profitability.\nVisit ourInstitutional Page\nAbout the role\nWe are looking for a Senior Security Engineer to work closely with our teams to strengthen the security and resilience of our AI ecosystem. In this role, you will identify and assess security risks across machine learning models and Generative AI applications, design and implement security controls, and help build security frameworks and tooling for the safe adoption of AI at scale.\nYou will partner with engineering teams to integrate security throughout the AI development lifecycle, automate security assessments and controls, and contribute to the continuous evolution of our AI security practices. This role combines hands-on security engineering, risk analysis, and applied AI security, requiring strong technical expertise, sound judgment, and a proactive mindset to help ensure the secure and responsible use of AI technologies.\nMain Responsibilities\nIdentify and analyze vulnerabilities, providing insights and recommendations for mitigation;\n\nContribute to the development and implementation of cutting-edge security frameworks, ensuring the responsible and secure usage within our AI ecosystem;\n\nWork closely with development teams to integrate security measures into the AI development lifecycle;\n\nAssist in incident response planning specific to AI-related security incidents and participate in simulations to test response effectiveness;\n\nDevelop and integrate tools to automate security assessments and controls;\n\nProactively seek knowledge and engage in research and development initiatives to support innovation;\n\nRaise Nubank awareness towards safe AI usage.\n\nMust Have\nKnowledge of security frameworks, such as OWASP;\n\nProgramming skills in languages commonly used in machine learning (e.g., Python);\n\nProactive mindset with the ability to analyze complex systems and identify potential security risks;\n\nStrong communication skills to effectively convey complex security concepts to technical and non-technical stakeholders.\n\nHands-on experience with CI/CD pipelines and implementing security tools (e.g., SAST, DAST, SCA).\n\nExperience with high scalability environments.\n\nExperience in zero-trust and regulated environments.\n\nNice to Have\nExperience with AI frameworks and libraries (e.g. PyTorch, TensorFlow);\n\nExpertise with automation programming languages (e.g. Bash, Ansible, Go);\n\nKnowledge of cloud infrastructure technologies (e.g. AWS, K8S, Terraform);\n\nKnowledge of Machine Learning and Generative AI concepts and technologies (e.g. HuggingFaces, MCP).\n\nRole Location\nHybrid: Belo Horizonte, Rio de Janeiro, São Paulo, Campinas - SP.\nOur Benefits\nChance of earning equity at Nubank\n\nFood/ Meal Card (Vale-Refeição and/or Vale Alimentação)\n\nPublic Transportation Commuting Benefit (Vale-Transporte)\n\nNuCare - Psychological, Financial and Legal Assistance Program\n\nLife Insurance\n\nMedical Plan\n\nDental Plan\n\nNuLanguage - Language Course Program\n\nNucleo - Our learning platform of courses\n\nExtended Parental Leave\n\nDaycare Allowance\n\nParental Consultancy\n\nWork-from-home Allowance\n\nGym Partnerships\n\n30 days of paid vacation\n\nRelocation Assistance Package, if applicable\nWork Model for this Role\nHybrid 2-3 times/week: Our hybrid work model brings us to the office at least twice a week, on strategic days designed to maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/\nExplore how we build technology at Nubank:\nbuilding.nubank.com.br ↗\nyoutube.com/@building.nubank ↗\nListen to our stories onSpotify ↗\n\nOur recruitment process may involve the use of artificial intelligence-enabled tools, such as automated interview transcription and analysis, to support the evaluation process. Artificial intelligence is not used to make final hiring decisions; all decisions are made by human reviewers.\nTo maintain a consistent and fair process for every candidate, Nu does not provide individualized technical feedback. See how our policy works here","description_format":"text","description_chars":4448,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Hybrid work","Life insurance","Parental leave","Relocation assistance"],"hiring_locations":[{"name":"Brazil","iso":"BR","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Artificial Intelligence","Financial Services","Cards & Card Issuing","Digital Banks & Neobanks"],"lifecycle":[{"event":"open","at":"2026-09-03T16:55:48Z"},{"event":"close","at":"2026-09-22T13:20:47Z"},{"event":"reopen","at":"2026-10-08T16:13:21Z"}],"visa":[],"liveness":{"score":34,"band":"fade","label":"Fading","p_open":1,"p_active":0.754,"p_room":0.45,"age_days":56,"expected_fill_days":37,"reasons":["conf:0","velocity","win:tail"],"computed_at":"2026-10-30T05:48:23Z"},"pay":null,"html_url":"https://alion.io/job/nubank-senior-security-engineer-ai-security","json_url":"https://alion.io/job/nubank-senior-security-engineer-ai-security.json","meta":{"generated_at":"2026-10-30T09:19:49Z","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":13407,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-31T00:00:00Z"}},"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":13935},"rest":"https://alion.io/mcp/rest/get_company?id=13935"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fnubank-senior-security-engineer-ai-security"},{"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%2Fnubank-senior-security-engineer-ai-security"},{"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%2Fnubank-senior-security-engineer-ai-security"},{"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/nubank-senior-security-engineer-ai-security\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnubank-senior-security-engineer-ai-security"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":197633}},{"tool":"search_jobs","arguments":{"company":"nubank.com.br","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":197633},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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