Lead Fullstack Engineer

Koalafi

Lead Fullstack Engineer building frontend infrastructure for Koalafi's financing applications. Collaborate with product and design to enhance user experiences across legacy and new systems.

Posted 6/15/2026full-timeRemote • Virginia • 🇺🇸 United StatesSenior💰 $168,000 - $227,000 per yearWebsite

Tech Stack

Tools & technologies

AngularAWSCypressGoJavaNode.jsPythonReactVue.js

About the role

Key responsibilities & impact

Work with Design and Product to improve and maintain the application experience for both our customers and merchant partners
Review and understand high level feature requirements to propose implementation options and define user stories
Collaborate cross-domain to further understand potential impacts and limitations of proposed requirements
Actively engage in agile processes including sprint planning, retrospectives, and daily stand-ups
Oversee delivery of features step by step: develop implementation plans, coordinate tasks with teammates, communicate with stakeholders, devise testing strategy, and deliver to production
Help to evaluate priority, troubleshoot, and resolve bugs across the stack
Research and implement emerging technologies to improve system performance and customer experience
Drive front-end strategy within the team, with a focusing on maintainability and extendibility
Champion new ideas to shape strategy for the Tech organization as a whole
Act as a technical mentor, guiding engineers on best practices and modern standards pertaining to UI development
Participate in code reviews to ensure high-quality standards as well as share knowledge across the team
Improve application observability to better understand customer behavior and identify areas for improvement
Minimize application bundle size and load times to minimize friction
Utilize AI tooling in day to day tasks to streamline implementation cycles

Requirements

What you’ll need

Four-year college degree in Computer Science/Engineering or Information Systems required
6+ years of experience with modern web technologies (React, Vue, Angular)
React preferred
Experience in UX from accessibility to user behavior to responsive/adaptive web design
Knowledge of front-end tooling and best practices in areas such as state management, component libraries, and performance optimizations
Experience in writing end to end test suites using tooling that simulates user behavior (Cypress, Playwright, etc.)
Knowledge of building and consuming REST APIs using modern programming languages (Golang, Java, Node, Python, etc.).
Golang preferred
Understanding of HTTP/REST architecture and operation for APIs/Orchestration
Knowledge of architecting and delivering applications in AWS
Knowledge of scrum/agile software development process
Exceptional analytical, conceptual, and problem-solving abilities
Highly self-motivated and directed, with keen attention to detail
Ability to work in a team-oriented, collaborative environment
Excellent communication skills with strong EQ.

Benefits

Comp & perks

Comprehensive medical, dental, and vision coverage
20 PTO days + 11 paid holidays
401(k) retirement with company matching
Student Loan & Tuition Reimbursement
Commuter assistance
Parental leave (maternal + paternal)
Inclusion and Associate Engagement Programs

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

ReactVueAngularGolangJavaNodePythonCypressPlaywrightREST APIs

Soft Skills

analytical skillsproblem-solvingself-motivatedattention to detailteam-orientedcollaborativecommunication skillsemotional intelligence

Certifications

Bachelor's degree in Computer ScienceBachelor's degree in EngineeringBachelor's degree in Information Systems