Senior Software Engineer, Kit (Formerly ConvertKit)

• Expertise developing complex web applications with high-craft beautiful user experiences, using React, JavaScript, and modern CSS frameworks like tailwind
• Expertise with Ruby on Rails (preferred). Or experience with other backend frameworks with willingness to learn and master Rails. You’re a strong contributor across the stack, from the browser to the database
• Ability to plan, estimate, and execute complex ambiguous projects independently while keeping stakeholders informed
• Ability to write high-quality, well-tested, performant, and accessible code with minimal guidance
• Clear communication skills with ability to drive clarity with Engineers, Product Managers, and Designers
• Experiences:
• Partnering effectively with Product and Design to create delightful experiences, prioritizing user outcomes and business impact in your technical solutions
• Working across a legacy codebase and evolving it safely through migrations and system refactors
• Diagnosing root causes of problems and proposing solutions with clear trade-offs and business impact
• Mentoring and teaching other engineers formally and informally
• High agency and ability to work independently while collaborating closely with teammates
• Adaptability within a dynamic and ambiguous environment, with proactive ownership of problems
• 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 give thoughtful peer feedback
• Embraces learning with growth mindset and a demonstrated ability to build new skills quickly

Desirable

• We’re looking for a Senior Software Engineer 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
• This is a hands-on role for a product-minded full-stack engineer who excels at crafting exceptional user experiences
• You'll architect complex features across the stack while collaborating closely with Product and Design to deliver impactful solutions that elevate how creators experience our publishing platform
• 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: Own and deliver at least one complex feature from concept to launch. Improve our codebase through thoughtful refactoring while maintaining quality standards. Ensure service reliability by participating in on-call rotations. Present at least one Lunch & Learn session. Proactively identify and act on opportunities to improve our product and development processes

• Deadline to Apply: October 24, 2025 at 4:00 AM UTC
• We usually receive a large number of applications, and our goal is to follow up with you within two weeks
• You’ll hear from us either way. Here’s what you can expect from the rest of our hiring process:
• A phone screen with our recruiter
• Hiring manager screen
• Take-home assignment
• A technical interview
• Technical execution & collaboration interview
• We’ll keep you informed through every step. To get started, complete this application, including a cover letter and answers to the questions on the next page. We read every single application, and your cover letter and responses help put your experience into context