Senior Software Engineer, Back-End Focus

Build scalable Ruby and Typescript applications that power Kin’s insurance platform. Solve complex problems, mentor engineers, and ship high-impact features in a fast-moving environment. We’re looking for a Senior Software Engineer to help us build and scale the products that power Kin’s insurance platform. In this role, you’ll tackle complex engineering challenges across our Ruby-based backend and Typescript front-end systems. You’ll collaborate closely with Product, QA, and cross-functional partners to ship high-quality features using Scrum methodologies.

Responsibilities

Design, build, and maintain scalable backend services in Ruby, with occasional contributions in Python and Typescript; Develop and enhance front-end functionality using modern JavaScript frameworks and Typescript; Lead and contribute to architectural and design discussions that improve long-term system maintainability; Ship large, complex features from concept through deployment with high quality and strong testing practices; Participate actively in Scrum ceremonies including daily standups, sprint planning, and retrospectives; Collaborate cross-functionally with Product, QA, PMO, and other engineering teams to align technical solutions with business goals; Mentor junior engineers through pair programming, code reviews, and technical guidance; Advocate for thoughtful technical investments and clearly articulate trade-offs to stakeholders; Contribute to improving development workflows, tooling, and engineering best practices

Requirements

Demonstrated track record of shipping large, complex software projects in production environments; Fluency in Ruby and experience working with Python or Typescript; Experience with PostgreSQL or other relational databases; Experience contributing to architectural design and technical decision-making; Ability to articulate the value and trade-offs of technical investments; Experience mentoring engineers through code reviews, pairing, or informal leadership; Familiarity with modern JavaScript frameworks such as React, Vue, or Angular; Experience operating within Agile/Scrum development environments; Comfortable in a fast-paced startup environment with evolving priorities; Ability to operate independently with limited technical guidance; Strong communication skills and cross-functional collaboration experience; Able to live and work full-time in one of the listed states (AL, AR, AZ, CA (exempt only), CO, CT, FL, GA, ID, IL, IN, IA, KS, KY, MA, ME, MD, MI, MN, MO, MT, NC, NE, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, UT, VT, VA, WA, and WI); At this time, we are unable to sponsor employment visas for this role

Nice to have

Located in Central or Eastern US time zones (CDT or EDT) strongly preferred

Benefits

Competitive salary and company equity through Restricted Stock Units (RSUs); 401(k) with company match up to 4% of eligible earnings; Multiple medical plan options, plus dental and vision coverage; Company-funded HSA contributions; Company-paid life insurance and short-term disability; Supplemental benefits including long-term disability, critical illness, accident, legal, and pet insurance; Mental health support and confidential counseling resources; Flexible PTO for exempt employees, plus 8 company-observed holidays; Paid parental leave (up to 14 weeks at 100% pay for birthing parents and 8 weeks at 100% pay for non-birthing parents); Career mobility and internal growth opportunities; Professional development budgets