Senior Software Engineer (Backend), Deliverability

Front is the customer operations platform built for B2B complexity, keeping every team, tool, and customer conversation in sync so companies can scale without losing connection. Others handle simple interactions. Front handles the coordination and context behind complex B2B customer relationships. Over 9,000 companies, including Uber Freight, Navan, and Stripe, rely on Front because it's the only one that can run the operational layer that makes customer-facing work actually succeed.Backed by Sequoia Capital and Salesforce Ventures, Front has raised $204M from leading venture capital firms and independent investors including top executives at Atlassian, Okta, Qualtrics, Zoom, and PagerDuty. Front has received numerous Great Place to Work accolades, including Built In's 100 Best Midsize Places to Work in SF 2025, Top Places to Work by USA Today 2025, Y Combinator's list of Top Companies in 2023, #4 on Fortune’s Best Workplaces in the Bay Area ,Inc. Magazine's 2022 Best Workplaces list, and Forbes Best Startup Employers 2022 List.We're looking for two experienced backend Software Engineers to join our Deliverability team in San Francisco. This team is responsible for the core systems that power Front - the pipeline that connects Front to the external world - which process tens of millions of events delivering emails, SMS, and other messages to and from Front quickly and reliably. You'll own critical infrastructure that our customers depend on and take on a technical leadership role within the team, building upon our deliverability systems that need to be performant, scalable and reliable, all at once.What will you be doing?Serve as a technical lead on the Deliverability team, driving the architecture and execution of major infrastructure and product projectsOwn and improve high-volume email infrastructure and decisioning systems spanning ingestion, routing, and outbound delivery, driving deliverability outcomes at scaleOwn key services that power Front and lead architectural evolutions to build for reliability and scaleCollaborate with other systems and infrastructure teams to build upon next-generation architectureCollaborate closely with product managers, product designers and other engineers to conceptualize, build, and test new product featuresWhat skills and experience do you need?5+ years of professional software engineering experienceStrong experience building and operating high-scale, distributed backend systemsComfort owning complex systems and making architectural decisions with real production impactA collaborative, low-ego approach to engineering and cross-team partnershipsExperience with on-call responsibilities and a strong sense of ownership over system reliabilityProduct mindset, building scalable and extensible solutions that meet customer requirementsFluency in a dynamic language like Javascript (Typescript), Python, Ruby, or similarStrong track record of launching and delivering projects of significant complexity and high level of ambiguityExperience architecting, deploying and operating asynchronous work queues, high-volume storage systems, or high-throughput systemsUnderstand the trade-offs in employing different engineering solutions to a problem, valuing pragmatism over idealismAbility to thrive in a dynamic, fast-paced, collaborative, and high-growth environmentNice to have - Prior experience at a B2B SaaS or customer communications companyFamiliarity with email sending at high volume (millions of messages/day)Experience with DNS infrastructureExperience working on software systems built on Amazon Web ServicesDeep knowledge of the email stack and assorted RFCsExperience with anti-spam infrastructure to prevent bad actors from exploiting an email serviceBuilt deep integrations with an email delivery service like SendGrid, MailGun, Mandrill or SparkPostExperience with Gmail or Office 365 APIsExperience with KafkaFront operates on a hybrid model — we come together in the office each Tuesday, Wednesday, and Thursday to collaborate and stay connected.What we offerCompetitive salaryEquity (we are post-series D & backed by some of the best VCs in the US)Private health insurance, including plan options at no cost to employeesPaid parental leaveFlexible time off policyFlexibility to work from home Monday and Friday, unless posted as a fully remote roleMental health support with Workplace OptionsFamily planning support with Maven$100 per month Lifestyle Stipend to spend on fitness, health and wellness, and other activitiesWellness Days - Fronteers get an additional day off on months with no holidaysWinter Break - Our offices are closed from Christmas to New Year's Day!Front provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age or disability. By applying, you acknowledge and agree that you have read and understand the California Recruiting Privacy Notice & EU Privacy NoticeCompensation Range: $177.9K - $203.7KLocationSan Francisco, CAEmployment TypeFull timeDepartmentEPDCompensationEstimated Base Salary $177.9K – $203.7K • Offers EquityIndividual compensation packages are based on factors unique to each candidate, including job-related skills, experience, qualifications, work location, training, and market conditions. At Front, we take a market-based approach to pay. In addition to cash compensation (base salary, which may include commissions or overtime pay where applicable), Fronteers are eligible to receive equity in the company. This resource will provide additional information on our location zone designations. If you have questions, please contact a member of our recruiting team for additional information.