{"id":3037558,"url":"https://alion.io/job/affirm-senior-software-engineer-backend-cost-engineering","title":"Senior Software Engineer, Backend (Capacity Modeling)","company":{"id":572,"name":"Affirm","domain":"affirm.com","url":"https://alion.io/company/affirm","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":81,"open_postings":7,"ghost_share":0,"stale_share":0.571,"repost_share":0,"time_to_fill_p50_days":68,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Canada"],"countries":["CA"],"hiring_countries":["CA"],"hiring_countries_total":1,"salary":{"min":153000,"max":213000,"currency":"CAD","period":"year","gross":null,"usd_annual":151929},"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"AWS","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"MySQL","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-10-21T18:00:26Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-26T10:01:32Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"At Affirm, we exist for the moments that matter-giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.\nThe Capacity Modeling team ensures Affirm can safely handle forecasted traffic-especially during peak sales events-by translating demand forecasts into concrete, testable capacity plans. They build and maintain statistical capacity models that map traffic inputs (e.g., checkout volume, app opens, batch/job activity) to resource outputs (CPU, memory, connections) and then convert those forecasts into recommended capacity settings such as pod counts, HPA ranges, and/or infrastructure sizing changes across regions and environments.\nWhat You'll Do\n· You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery.\n· You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs.\n· You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them.\n· You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts.\n· You will foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.\n· You will help develop talent on your team by providing feedback and guidance, and leading by example.\nWhat We Look For\n· You have 4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin.\n· You have a track record of developing highly available distributed systems using technologies like AWS, MySQL and Kubernetes.\n· You have experience supporting scale up and down of large scale sales event such as Prime Day, Black Friday Cyber Monday, or other sales holidays\n· You have tuned autoscaling, CPU/Memory, and multi-threading for compute type workloads.\n· You have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design. You write high quality code that is easily understood and used by others.\n· You are proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely.\n· Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders.\n· You have strong verbal and written communication skills that support effective collaboration with our global engineering team.\n· This position requires either equivalent practical experience or a Bachelor’s degree in a related field.\nPay Grade - N\nEquity Grade - 6\nEmployees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.\nBase pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company).\nCAN base pay range per year: CAD $153,000 - $213,000.\nLocation - Remote Canada\n This remote role is open only to candidates residing in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan.\nThis posting is for an existing vacancy.\n#LI Remote \nRemote-first with flexibility built in\n Affirm is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an Affirm office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience.\nBenefits designed for you \n Our benefits reflect our commitment to care, transparency, and flexibility. Here are a few highlights:\nHealth coverage at no cost: We cover 100% of premiums for employees and their dependents.\nSpending stipends: Monthly stipends support your tech setup, and the ability to choose health and wellness options that are right for you.\nTime off to recharge: Flexible time off and generous holiday calendars help you rest when you need to.\nOwn a piece of what you build: Our employee stock purchase plan (ESPP) lets you buy Affirm stock at a discount.\nWe’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities. If you need support, we’re happy to help.\nFor positions based in San Francisco or Los Angeles: Affirm considers qualified applicants with arrest and conviction records, as required by law.\nBy clicking \"Submit Application,\" you acknowledge that you have read Affirm's Global Candidate Privacy Notice and consent to the use of your personal information as described.","description_format":"text","description_chars":5550,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Flexible time off"],"hiring_locations":[{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Buy Now, Pay Later"],"lifecycle":[{"event":"open","at":"2026-10-21T21:47:55Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":4,"expected_fill_days":68,"reasons":["conf:0","velocity","win:early","comp:brand"],"computed_at":"2026-10-26T05:57:25Z"},"pay":{"stated_usd_annual":151929,"is_top_pay":false},"html_url":"https://alion.io/job/affirm-senior-software-engineer-backend-cost-engineering","json_url":"https://alion.io/job/affirm-senior-software-engineer-backend-cost-engineering.json","meta":{"generated_at":"2026-10-26T13:52:44Z","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":19173,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"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":572},"rest":"https://alion.io/mcp/rest/get_company?id=572"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Faffirm-senior-software-engineer-backend-cost-engineering"},{"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%2Faffirm-senior-software-engineer-backend-cost-engineering"},{"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%2Faffirm-senior-software-engineer-backend-cost-engineering"},{"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/affirm-senior-software-engineer-backend-cost-engineering\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Faffirm-senior-software-engineer-backend-cost-engineering"}]}