{"id":747736,"url":"https://alion.io/job/scope3-staff-software-engineer-fullstack-be-leaning","title":"Staff Software Engineer (Fullstack, BE-leaning)","company":{"id":3834685,"name":"Apostra","domain":"apostra.com","url":"https://alion.io/company/apostra-2","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["US","CA"],"hiring_countries_total":2,"salary":null,"salary_estimate":{"min_usd":105000,"max_usd":184000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":28},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"A2A","optional":false},{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"GCP","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Node JS","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"Google BigQuery","optional":true},{"name":"JavaScript","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Redis","optional":true}],"status":"live","first_seen_at":"2026-06-30T23:15:06Z","employer_posted_date":"2026-06-30","last_verified_at":"2026-11-03T03:04:35Z","board_verified":true,"closed_at":null,"days_open":125,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":125},"description":"About Apostra\nApostra is defining a new future for advertising, for both humans and their agents.\nOur founders helped build the technology that shaped advertising as we know it today. Now, we’re reimagining it from the ground up for a world of people and agents, with human intent at its heart.\nWe’re creating a place where advertisers, media owners and their agents can discover and act on every kind of media, opening up opportunities that have historically been fragmented and hard to access.\nAbout the Role\nWe’re building the future of programmatic advertising through AI agents. Our technical team is creating the infrastructure that enables AI agents to discover, negotiate, and transact media inventory autonomously.\nIn this role, you’ll be a technical leader responsible for the APIs, protocols, and agent interfaces that power our agentic advertising platform. You’ll design systems where AI agents are first-class participants, with their own authentication, capabilities, and communication standards.\nYou’ll work at the intersection of advertising technology, distributed systems, and emerging AI agent frameworks-making architectural decisions that shape how our marketplace evolves.\nThis is a Fullstack (80/20 backend leaning), hands-on leadership role. You’ll write production code, prototype new agent communication patterns, review system designs, and mentor engineers while setting technical direction.\nThis isn’t a typical engineering role\nWe’re operating in a space without a fixed playbook, so this role is best suited for builders who are comfortable creating structure where none exists.\nOur approach favors rapid experimentation over upfront perfection-we test, learn, and then formalize what works.\nThe pace is fast and often pushes beyond what feels comfortable. For the right person, that’s part of the appeal.\nWe’re also looking for engineers who are already actively exploring AI-this isn’t a “learn it on the job” environment.\nResponsibilities:\nDesign and architect scalable APIs for both human and AI agent clients\nLead development of agent interfaces, MCP servers, and A2A communication layers\nBuild and operate high-throughput systems for real-time advertising transactions\nEvaluate and integrate emerging agent frameworks and protocols\nPartner with product and design to define clear, agent-friendly API contracts\nDrive architectural decisions around authentication, protocols, and transaction flows\nCollaborate with external DSPs, SSPs, and agent platform partners\nMentor engineers on API design, distributed systems, and agent architectures\nAnticipate and address edge cases in autonomous agent behavior\nQualifications:\n8+ years building distributed backend systems at scale\n4+ years in a technical leadership role\nStrong expertise in API design and architecture (REST, event-driven systems, auth, versioning)\nExperience with AI agent frameworks and communication protocols, or the ability to rapidly learn and evaluate them\nProficiency with TypeScript/Node.js, React, and cloud platforms (GCP or AWS)\nExperience designing systems for autonomous or semi-autonomous decision-making\nTrack record of mentoring engineers and fostering a collaborative team culture\nComfort working in fast-moving, evolving environments\nAdTech experience preferred, but not required\nTech Stack:\nAPI Layer: TypeScript/Node.js, REST and event-driven services\nAgent Interfaces: MCP servers and A2A protocol handlers\nData: PostgreSQL, BigQuery, Cloud Storage, Redis\nAs the agent ecosystem evolves, you’ll help evaluate new technologies and ensure our marketplace remains at the forefront.\nCompensation:\nThe salary range for this role is $180k-$230k USD / $190k-$245k CAD.\nThese ranges span multiple location-based salary bands across the US and Canada. Candidates are aligned to a narrower range based on geographic market compensation data specific to where they live, and final offers reflect demonstrated skills, experience, and role expectations.\nBenefits & Perks:\nDetails vary by location (USA/Canada), but all employees receive:\nHealth & wellness: Comprehensive medical, dental, and vision coverage with significant employer contribution; short- and long-term disability coverage; health savings/flexible spending options\nRetirement: Employer-matched retirement savings plan (401(k) or RRSP)\nTime off: Generous paid time off, statutory holidays, and year-end office closure\nParental leave: 13 weeks fully paid (eligibility requirements apply)\nRemote work: Company-provided home office equipment, setup stipend, and access to WeWork spaces\nEquity: Stock options","description_format":"text","description_chars":4574,"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","Home office","Parental leave","Retirement plans","Stock options"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Advertising","Marketing & Sales AI"],"lifecycle":[{"event":"open","at":"2026-09-11T14:41:45Z"}],"visa":[],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.362,"p_room":0.28,"age_days":125,"expected_fill_days":27,"reasons":["conf:2","win:tail","crowd:"],"computed_at":"2026-11-03T05:54:40Z"},"pay":null,"html_url":"https://alion.io/job/scope3-staff-software-engineer-fullstack-be-leaning","json_url":"https://alion.io/job/scope3-staff-software-engineer-fullstack-be-leaning.json","meta":{"generated_at":"2026-11-03T07:23:16Z","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":10391,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-04T00:00:00Z"}},"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":3834685},"rest":"https://alion.io/mcp/rest/get_company?id=3834685"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fscope3-staff-software-engineer-fullstack-be-leaning"},{"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%2Fscope3-staff-software-engineer-fullstack-be-leaning"},{"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%2Fscope3-staff-software-engineer-fullstack-be-leaning"},{"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/scope3-staff-software-engineer-fullstack-be-leaning\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fscope3-staff-software-engineer-fullstack-be-leaning"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":747736}},{"tool":"search_jobs","arguments":{"company":"apostra.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":747736},"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. Docs: https://alion.io/developers"}}