{"id":1148068,"url":"https://alion.io/job/affirm-senior-software-engineer-backend-consumer-authentication-platform","title":"Senior Software Engineer, Backend (Consumer Authentication Platform)","company":{"id":572,"name":"Affirm","domain":"affirm.com","url":"https://alion.io/company/affirm","size_band":null,"is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":70,"open_postings":5,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":76,"computed_at":"2026-09-24T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["CA"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":130000,"max_usd":246000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":105},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"AWS","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"MySQL","optional":false},{"name":"PCI DSS","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false}],"status":"live","first_seen_at":"2026-09-23T15:55:30Z","employer_posted_date":"2026-09-23","last_verified_at":"2026-09-24T08:48:04Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"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 Consumer Authentication Platform team is looking for a passionate Senior Software Engineer to help build the secure, reliable, and seamless authentication experiences that connect millions of consumers with Affirm’s financial products.\nAuthentication is the front door to Affirm. Our systems power critical consumer journeys (including sign-up, sign-in, account recovery, checkout authentication, step-up challenges, session management, and connected merchant experiences) across thousands of merchants and multiple countries. We build foundational capabilities such as authentication factors, identity federation, session and authorization services, and risk-based authentication that protect consumers while minimizing unnecessary friction. We work closely with Product, Security, Fraud, Identity, Analytics, Compliance, Data Science, and a wide range of engineering teams to both leverage existing systems and build new systems. This role requires a high level of technical capability, strong cross-functional communication, and a creative mindset. Our work needs to be secure, reliable, correct, scalable, and extensible. Our job is to build an authentication platform that balances security, regulatory requirements, fraud prevention, customer experience, and business growth.\nAs a senior engineer, you will lead significant technical initiatives, influence the architecture and evolution of the platform, and help the team deliver secure authentication capabilities that can be reused across products, merchants, and geographies.\nWhat You’ll Do\nYou will own the technical design and delivery of significant authentication platform capabilities, leading projects from early requirements and architecture through implementation, rollout, and ongoing operation.\nYou will build secure, highly available systems that support consumer sign-in, authentication factors, account recovery, step-up authentication, session management, authorization, and identity federation.\nYou will support your peers and stakeholders in the product development lifecycle by collaborating with product management, Security, Fraud, Compliance, design, and analytics; participating in ideation; articulating technical constraints; and partnering on decisions that properly consider risks and trade-offs.\nYou will translate security, regulatory, fraud, and customer-experience requirements into pragmatic technical designs that appropriately balance risk, friction, complexity, and delivery speed.\nYou will proactively identify project, process, technology, security, reliability, or business issues, advocate for them, and lead in solving them.\nYou 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,” and on-call efforts.\nYou will foster a culture of quality, security, and ownership on your team by setting or improving code review and design standards and advocating for them beyond your team through your writing and tech talks.\nYou will help develop talent on your team by providing feedback and guidance, mentoring other engineers through design reviews and hands-on collaboration, and leading by example.\nYou will clearly communicate technical decisions, constraints, risks, and trade-offs to engineering and non-engineering audiences through design documents, reviews, and technical discussions. You will lead the investigation and resolution of complex production issues and identify systemic improvements that prevent recurrence.\nWhat We Look For\nYou have 4+ years of experience designing, developing, and launching backend systems at scale using languages like Python, Kotlin, Java, or another comparable modern programming language.\nYou have a track record of developing highly available distributed systems using technologies like AWS, MySQL, and Kubernetes, as well as relational databases, event-driven architectures, and RPC or API frameworks.\nYou have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, secure, simple, and extensible design. You write high-quality code that is easily understood and used by others.\nYou are proficient at making significant changes in a large codebase and have developed a suite of tools and practices that enable you and your team to do so safely, including testing strategies, migration plans, and controlled rollouts.\nYour experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, manager, and stakeholders, while helping other engineers grow through mentorship and technical leadership.\nYou have strong verbal and written communication skills that support effective collaboration with our global engineering team and cross-functional partners.\nThis position requires either equivalent practical experience or a bachelor’s degree in a related field.\nFamiliarity with standards and protocols such as OAuth 2.0, OpenID Connect, WebAuthn/passkeys, FIDO2, JWTs, and public-key cryptography. Knowledge of security and assurance frameworks such as the NIST Digital Identity Guidelines or PCI DSS.\nExperience designing session-management, token-issuance, account-recovery, or multi-factor authentication systems. Familiarity with risk-based or adaptive authentication and the interaction between identity, security, compliance, and fraud controls.\nThis 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\nPay Grade - N\n Equity Grade - 6\n Employees 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 equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents.)\nCAN base pay range per year: $153,000 - $213,000 CAD\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":7791,"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":["Commerce"],"lifecycle":[{"event":"open","at":"2026-09-23T16:19:36Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":76,"reasons":["conf:1","velocity","win:early","comp:brand"],"computed_at":"2026-09-24T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/affirm-senior-software-engineer-backend-consumer-authentication-platform","json_url":"https://alion.io/job/affirm-senior-software-engineer-backend-consumer-authentication-platform.json","meta":{"generated_at":"2026-09-24T09:32:46Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}