Senior Software Engineer, Kit (Formerly ConvertKit)

• You're a frontend expert who thinks full-stack
• Modern frontend React development should be your superpower
• You're obsessed with crafting exceptional user experiences and have shaped React architectures at scale
• Deep expertise developing high-craft web applications, with a strong background in React, JavaScript, and modern CSS frameworks like tailwind
• Experience with Ruby on Rails (preferred). Or experience with other backend frameworks and languages, with willingness to learn and master Ruby on Rails
• Ability to architect systems that are well-designed, scalable, accessible, and easy to maintain, with a solid understanding of frontend testing practices
• Proven ability to partner effectively with Product and Design to create delightful experiences, prioritizing user outcomes and business impact in your technical solutions
• Clear and concise communication skills, tailoring messages to the audience and driving clarity across teams
• Acting as a frontend subject-matter expert, helping teams adopt modern frontend frameworks, patterns, and tradeoff decisions
• Building complex web components, such as visual canvases or rich text editors
• Leading complex technical projects from ambiguous ideation to launch and iteration beyond, taking extreme ownership to drive clarity, anticipate risks, and prioritize the biggest impact
• Working across a legacy codebase and evolving it safely through migrations and system refactors
• Championing solutions that have demonstrated large positive impact across teams
• High agency and ability to work independently while collaborating closely with teammates
• Adaptability within a dynamic and ambiguous environment, with proactive ownership of problems
• Strong interest in AI and eagerness to experiment with the evolving landscape to make our work more efficient and effective
• Openness to direct feedback and continuous improvement, with ability to shape team culture through empathetic feedback and mentoring
• Embraces learning with growth mindset and a demonstrated ability to build new skills quickly and model this for others

Desirable

• We’re looking for a Senior Software Engineer II to build Kit’s core publishing platform and creator growth experiences
• You will be joining the Builders team, which builds the suite of publishing tools creators use to create emails, landing pages, and newsletters
• Our team is responsible for creators' first experiences in the app, from onboarding, to activation, and conversion. And we steward Kit’s core application experience and design system
• But you don't stop at the browser: you architect end-to-end features from database to deployment
• You'll help us raise the bar for how creators experience our publishing platform by combining your frontend mastery with full-stack execution
• You combine technical depth with leadership and extreme ownership. You partner closely with Product and Design to shape the “what” as well as the “how.” You thrive in ambiguity, take initiative, and elevate the people around you
• You'll report to the Engineering Manager who leads the Builders team, a cross-functional product team at Kit
• You'll collaborate closely with a Product Manager, Product Designer, and peer Software Engineers
• You’ll also have access to a group of Engineers across Kit for support and mentorship, and will start with a peer onboarding buddy who will help you navigate our systems and codebase
• First Week: Dive into our codebase and publishing platform architecture. Set up your local environment and merge your first production code. Take part in Get To Know You's to meet our distributed team
• First Month: Work through your personal onboarding plan. Begin understanding how our publishing tools support creators from onboarding to conversion, and identify opportunities for improvement. Join team activities for planning, building, and measuring the experiences we ship to creators. Actively participate in code reviews, and contribute PRs weekly
• First Six Months: Lead and architect at least one major feature from ambiguous idea to launch. Transform our legacy codebase through strategic refactoring while applying systems thinking to enhance scalability and maintainability. Drive adoption of patterns and conventions that elevate team-wide technical standards. Ensure service reliability by participating in on-call rotations. Present at least one Lunch & Learn session. Actively mentor peers, and champion quality across our codebase

• Deadline to Apply: January 31, 2026 at 5:00 AM UTC
• We know that most people hate interviewing (we relate!). We aim to make it as good of an experience as we can, and part of that includes keeping you informed during the process
• Here’s what you can expect from the process:
• A phone screen with our recruiter
• Hiring manager interview
• Take-home assignment
• A technical interview
• Technical execution & leadership interview
• We read every single application, and your responses to our application questions help put your experience into context. We’ll keep you informed through every step