{"id":63024,"url":"https://alion.io/job/posh-senior-software-engineer-backend","title":"Senior Software Engineer, Backend","company":{"id":1758015,"name":"Posh","domain":"posh.vip","url":"https://alion.io/company/posh-vip","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Backend","role_family":"Backend","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":200000,"max":225000,"currency":"USD","period":"year","gross":null,"usd_annual":225000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":true},{"name":"GitHub","optional":true},{"name":"Java","optional":true},{"name":"JavaScript","optional":true},{"name":"Node JS","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-08-18T22:10:08Z","employer_posted_date":"2026-08-18","last_verified_at":"2026-11-04T11:38:13Z","board_verified":true,"closed_at":null,"days_open":77,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":77},"description":"About Posh\nWe are all social creatures, but the dominant “social” companies today have evolved into digital loneliness machines, driving isolation, anxiety, and mental health challenges around the world.\nHuman connection is lost. Posh is a beacon guiding us back.\nPosh enables anyone to build an IRL community based on shared interests, while connecting consumers with the communities of people just like them. Founded by event organizers who were frustrated with the growing loneliness epidemic and the tools available to build their own event brand, we’ve built the ultimate platform for launching, monetizing, and finding IRL communities of people just like you. In just 6 years, Posh has grown to a team of 70, expanded to 10M+ users, secured $70m in venture funding, and facilitated over $400M in transactions.\nAbout The Role\nWe're looking for a Senior Backend Engineer to help build and scale the systems behind Posh's platform. You'll take ownership of backend services already running at real scale, with organizers and attendees on the other end of everything you ship.\nThis is a hands-on IC role. You'll design APIs and services, make architecture calls that hold up under load, and push code quality up across teams beyond your own. You'll also mentor engineers earlier in their careers.\nThis is an in-person role at our New York City office in SoHo, 5 days a week onsite.\nKey Responsibilities:\nBuild and maintain the services and APIs that power Posh's platform, writing production code daily.\n\nTake end-to-end ownership of the backend systems you work on, from design through deployment and on-call.\n\nAddress performance and reliability issues as usage grows, evolving systems already in production rather than designing around problems on paper.\n\nInstrument what you build and design security in from the start rather than adding it later.\n\nBuild data models and pipelines that give organizers and the business actionable insight.\n\nContribute to design reviews and code review outside your immediate scope, and weigh in on technical decisions that affect other teams.\n\nMentor engineers earlier in their careers through code review, pairing, and direct feedback.\n\nParticipate in technical interviews and calibration.\n\nIdeal Candidate:\n5+ years of backend engineering experience, with a track record of shipping production systems in fast-paced environments.\n\nDeep expertise in backend fundamentals: APIs, data modeling, distributed systems, event-driven architecture.\n\nProficient in technologies relevant to our stack (e.g., Java, Node.js, PostgreSQL, MongoDB, AWS or similar technologies).\n\nExperience with Infrastructure as Code (e.g., Terraform) and deploying containerized applications.\n\nHas scaled systems operationally, not just designed them on paper - you've watched performance regress under load and evolved architecture that was already live.\n\nPragmatic about technology choices, and able to defend the tradeoffs you make.\n\nCommunicates technical tradeoffs clearly to engineers, product, and business stakeholders.\n\nExperience at a consumer, social, or marketplace company is a plus.\n\nWhen applying, please include links to your GitHub profile or a portfolio of past projects.\nPosh 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.\nThis policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.\nPosh is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. Please let us know if you need assistance or accommodation due to a disability","description_format":"text","description_chars":4008,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":70,"manages_managers":false,"education":{"level":"phd","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-08-18T22:10:08Z"}],"visa":[],"liveness":{"score":34,"band":"fade","label":"Fading","p_open":1,"p_active":0.775,"p_room":0.44,"age_days":77,"expected_fill_days":68,"reasons":["conf:4","win:tail","crowd:"],"computed_at":"2026-11-04T06:34:25Z"},"pay":{"stated_usd_annual":225000,"is_top_pay":true},"html_url":"https://alion.io/job/posh-senior-software-engineer-backend","json_url":"https://alion.io/job/posh-senior-software-engineer-backend.json","meta":{"generated_at":"2026-11-04T13:20:20Z","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":20197,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-05T00:00:00Z"}},"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":1758015},"rest":"https://alion.io/mcp/rest/get_company?id=1758015"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fposh-senior-software-engineer-backend"},{"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%2Fposh-senior-software-engineer-backend"},{"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%2Fposh-senior-software-engineer-backend"},{"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/posh-senior-software-engineer-backend\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fposh-senior-software-engineer-backend"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":63024}},{"tool":"search_jobs","arguments":{"company":"posh.vip","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":63024},"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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