Senior Software Engineer II - Ecosystem

Kit is an email-first operating system for creators who mean business. We help creators grow and monetize their audience with ease. For coaches, YouTubers, authors, podcasters, and other creatives, there isn't a better marketing hub to rely on to grow audiences, automate email marketing, and sell digital products — all within one platform.
More importantly, there isn't a team more committed to helping creators earn a living. We're on a mission to help creators earn $1 billion using our creator marketing platform. We have always been 100% independent and 100% remote.
We are proud to have built a product that our customers love, and we look for people who have enthusiasm and belief in our mission, vision, and values to join our team. We're also embracing AI thoughtfully — both in how we build and how we hire to ensure our team is adaptable, innovative, and ready for what's next.

We're looking for a Senior Software Engineer II to lead the evolution of our extensibility and automation platform that powers how creators customize Kit to their unique needs.

You'll be joining the Ecosystem team, which owns the Kit App Store, developer platform (APIs, plugins, webhooks, OAuth), and automation suite that enables creators to build sophisticated, automated marketing systems. We're a newly forming team tackling both legacy modernization and greenfield opportunities, so your enthusiasm for building resilient teams and transforming brown-field systems into elegant solutions is essential.

You're a full-stack, product-minded engineer with deep expertise in Ruby on Rails and React, not content with just shipping features but playing the long game. You see our developer platform not as a technical requirement but as the foundation that empowers thousands of creators to extend Kit in ways we haven't imagined. You combine technical depth with leadership and extreme ownership, partnering closely with Product and Design to shape both the "what" and the "how". You thrive in ambiguity, take initiative without waiting for permission, and elevate everyone around you through your generosity and optimism.

Most importantly, you understand that great developer experiences create compounding value: when we make it easier for others to build on Kit, we accelerate the entire creator ecosystem.

You'll report to the Engineering Manager who leads the Ecosystem 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 extensibility and automation 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 Kit App Store supports creators from small to large, 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.

• Deep expertise developing full-stack web applications using both Ruby on Rails and React, with a track record of owning features end to end

• Ability to write high-quality, well-tested, performant, and accessible code that balances speed of delivery with long term maintainability with minimal guidance

• Support strategic product decisions by anticipating business needs and translating them into technical solutions

• Communicate highly effectively across Engineering, Product, and Design to maintain alignment and momentum across complex initiatives

• Champion technical health through proactive monitoring, creating dashboards and alerting systems that identify issues early and drive systematic improvements

• Ability to lead without authority, aligning teams on goals, trade-offs, and success criteria

•  Led major cross-team initiatives from ambiguous requirements to successful delivery with measurable business impact

• Modernized and improved existing systems through hands-on brown-field development

• Made data-driven decisions throughout the product development lifecycle

• Worked transparently by sharing progress, learnings, and seeking feedback early and often

• Delivered features that directly impacted customer success and business goals

•  Model continuous growth while developing others through mentorship, code reviews, and deliberate knowledge sharing

• Balance pragmatism with strategic thinking, creating clarity and momentum for teams in uncertainty

• Champion creative execution by breaking down complex challenges into achievable steps others want to follow

• Pioneer AI adoption strategies that thoughtfully balance experimentation with practical team enablement

• Act as a force multiplier by building systems, tools, and knowledge-sharing practices that make the entire team more effective

• Shape and champion solutions that deeply align with user needs, balancing technical excellence with product impact

You will stand out if you have:

• Designed and scaled frameworks used by developers, like RESTful API platforms with versioning or OAuth app scopes

• Established thought leadership through conference talks, technical blogs, or significant OSS contributions

• Built successful products or partnerships within the creator economy ecosystem

• Struggling to operate in evolving problem spaces without established processes or guardrails

• Preferring to work solo or stay purely technical

• Needing full consensus or permission before moving forward

• Uncomfortable with direct feedback culture (both giving and receiving)

• Prioritizing technical perfection over pragmatic business solutions

We're 100% remote with team members across the globe. We work mostly on East Coast time—so if you're based on the West Cost of the United States, Europe, or Asia, you might have a few early mornings or late evenings. We do our best to keep things reasonable, but a little time zone juggling comes with the territory.

Kit has standardized salaries based on position, no matter where you live. For this role, we’re hiring at our level L4 ($181,000/year). Level is determined based on experience and our interview process.

• Profit Sharing

• Kit equity

• 401k with a 5% match

• We cover up to $1,950 per month toward medical premiums, with dental and vision premiums fully covered. We offer Health Insurance plans through Aetna.

• $4,000 equipment allowance for your first two years, $3,000 budget every following two years

• Individual learning + development budget ($3,500/year)

• Gender affirming benefits

• Childcare benefit up to $3,000 annually

• Twenty (20) days of paid time off during each year of employment

• Paid paid vacation: An after-tax bonus of $1,000 for taking five consecutive days of vacation where you’re fully unplugged from work

• Ten (10) paid holidays a year

• Two weeks of paid sick time each year, including mental health + well being days

• Twelve (12) weeks paid parental leave and flexible scheduling in your child’s first year

• Up to six weeks of paid bereavement leave, medical leave, and disaster after six months of employment, two weeks of each paid leave in your first six months

• Winter Break Closure: Kit closes for a week at the end of December, giving everyone a collective break to enjoy the holiday season. Essential support services remain available, with teams coordinating to ensure coverage during this period

• Four-week, paid sabbatical after five years with the team

• Fantastic in-person or virtual retreats with the team twice a year

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:

1. A phone screen with our recruiter

2. Hiring manager interview

3. Take-home assignment

4. A technical interview

5. Technical execution and leadership 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.

Kit is an equal opportunity employer

We value diversity in all of its forms. Research tells us that applicants who are female or non-binary, as well as applicants who are people of color, are less likely to apply for roles they do not feel 100% qualified for. If you think you meet more than 50% of our requirements but fewer than 100% of them, please apply.

We’re imperfect communicators, so think of our job postings as the starting point for discussion rather than proof that you shouldn’t apply.

Kit does not discriminate on the basis of race, sex, color, religion, age, national origin, marital status, disability, veteran status, genetic information, sexual orientation, gender identity or any other reason prohibited by law in provision of employment opportunities and benefits.