Drive user-facing projects and improve core services as a Senior Fullstack Engineer at Kikoff, a growing fintech company.
Posted by employer 7 hours ago
First seen on Joblaze 4 hours ago
Last verified on the company career page 4 hours ago
Skills & Technologies
What you'll build
- Lead and implement data-driven projects around user-retention
- Be the technical owner for large product areas
- Enhance observability and reliability across services
Must have
- 6+ years of industry experience
- Strong fullstack development experience with backend focus
- Strong cross-functional communication skills
- Demonstrated ability to own and drive complex projects
Nice to have
- Experience with financial infrastructure
- Background in fintech or payments
- Experience integrating third-party APIs
- Experience with classical ML model training
- Experience with observability in customer-facing systems
Requirements
- Experience
- 6+ years
- Education
- Bachelor's degree
Not disclosed in this posting: work arrangement, visa sponsorship.
Joblaze summary
In this role, the Senior Fullstack Engineer at Kikoff will lead user retention projects and enhance the app ecosystem, focusing on improving customer engagement and satisfaction. The position requires strong fullstack development skills, particularly in backend technologies, with experience in frontend frameworks like React or mobile development using Flutter. Ideal candidates will have over six years of experience, preferably in fintech or related fields, and should be adept at managing complex projects from inception to completion. Kikoff's team emphasizes ownership and collaboration, aiming to create impactful financial solutions for users.
Joblaze insights
- Listed today — first seen on Joblaze October 2, 2026. Last confirmed on Kikoff's careers page October 2, 2026.
- Salary band is above the typical range for Fullstack roles (median ~$165,000).
- Starts above 93% of 102 comparable senior fullstack roles in United States that list React we track (median $169,500 across 50 companies). See React salary trends
- React appears in 70% of 237 comparable senior fullstack roles in United States; Flutter appears in 0.8% of 237 comparable senior fullstack roles in United States.
Quick facts
- What's the salary range?
- Kikoff lists $244,000–$292,000 for this role.
- How much experience is required?
- At least 6 years of relevant experience for this Senior Fullstack Engineer - User Retention & App Ecosystem role.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: Flutter, MySQL, React, Ruby on Rails.
- What seniority level is this role?
- Kikoff targets senior candidates for this position.
- Is this full-time or contract?
- Full-time for this Senior Fullstack Engineer - User Retention & App Ecosystem role at Kikoff.
From the original posting
Kikoff: The Fintech Powering Financial Security at Scale
Kikoff is a profitable, pre-IPO fintech company on a mission to empower everyone to achieve financial security. With record revenue growth in 2025 and a unicorn valuation, we've built a suite of products that help millions of people build credit, access liquidity, and save money.
We're scaling fast. Join us if you want to build something meaningful and help millions of people move forward financially.
About the team
The User Retention and App Ecosystem team focuses on sustainable, long-term, and interconnected customer growth at Kikoff. We help customers stay around longer and get more value from their subscriptions. We ensure that customers are excited to explore the different consumer fintech apps across Kikoff’s growing ecosystem, with as little cross-app friction as possible.
We’re looking for a Senior Fullstack Engineer to drive user-facing projects, improve existing core services, and own product domains. If you like owning both the work and the outcome of a complex project end-to-end, we’d like to talk to you!
What you’ll be doing
- Lead and implement data-driven and impact-focused projects around user-retention and ecosystem integration end-to-end, affecting millions of users.
- Be the definitive technical owner for 1 to 2 large product areas across credit report retrieval, credit disputes, customer off-boarding experience, and cross-app integration.
- Enhance observability, reliability, and operational excellence across existing services.
What we’re looking for
- B.A. / B.S. / M.S. or strong self-taught fundamentals in computer science
- 6+ years of industry experience, or high-slope growth, with demonstrated breadth and depth of product impact
- Strong fullstack development experience with a backend focus: proficient or highly proficient on the backend, and experienced in either web frontend (React) or mobile (Flutter preferred)
- Strong cross-functional communication and coworking skills with product, data, design, and legal partners
- Demonstrated ability to own and drive complex projects end-to-end, coordinating focused teams through ideation, requirements, design, implementation, launch, and post-launch.
- Good judgment in identifying and choosing trade-offs between business impact, delivery speed, and long-term operational excellence
- Strong system design skills for both new and existing systems
An ideal candidate also shows
- Experience with financial infrastructure or regulated environments (credit bureau data, PII, SOC2)
- Background in fintech, payments, or lending infrastructure
- Experience integrating third-party APIs reliably and communicating with technical vendors
- Experience with classical ML model training and production deployment
- Experience with observability, monitoring, and alarms in customer-facing systems
- Experience with using business metric focused A/B tests and experiments for new features
- Experience in leveling up the team through code reviews, design docs, and technical guidance
- Thoughtful use of AI tools to accelerate delivery while maintaining operational excellence
- Eagerness for product and feature ideation
- Experience with our stack is a plus: Ruby on Rails, React, Flutter, MySQL
Equal Employment Opportunity Statement
Standard company text repeated across Kikoff's postings is omitted here.