Front End Developer

Leapfrog is a digital direct marketing firm, developing programs for Fortune 500 marketers that find, convert and monetize the right customers. Offering a unique mix of agency-level strategy and services, a proprietary closed-loop technology platform and a performance-based compensation model, Leapfrog Online's customized programs deliver full operating control and completely align with our Clients' goals strategically, operationally and financially.

Leapfrog Online is seeking a skilled Front End Developer to join our User Experience (UX) competency in a contract capacity; this role will implement and maintain high-volume consumer-facing, conversion-focused websites and e-commerce applications. Candidates should have 3+ years of experience, preferably working with targeted, data-driven transactional experiences and e-commerce.

* Build, maintain, test, and optimize targeted, data-driven transactional experiences and e-commerce flows. * Participate within the UX Team—comprised of Creative, Front End Development, Content Strategy, and Content Production—as a meaningful, collaborative contributor to ideas, process, and innovation. * Work with cross-functional teams across the organization to provide Front End perspective to potential solutions and communicate enhancements. * Participate in code reviews, research, and internal initiatives to drive Front End goals as a forward-thinking unit within the organization.

* A dependable problem-solver with an analytical mind and demonstrable applied experience with modern development standards and practices. * Strong experience in standards-based, semantic and well-formed HTML 5 markup, with an emphasis on cross-browser, device-independent product where responsive design techniques and modularity are paramount. * Fluent in writing elegant, truly cascading CSS to bring rich interfaces to life, and associated experience with CSS methodologies (OOCSS, SMACSS, BEM), preprocessing (SASS) and frameworks. * Experience with JavaScript and its associated ecosystem, prototyping and developing data-driven, complex interface solutions with an eye on performance and reusability. JavaScript ES2015/ES6 experience strongly preferred. * Familiar with the development and maintenance of web-based applications leveraging fit-for-purpose design patterns and related frameworks. * Experience with modular templating (e.g., Handlebars/Mustache, Nunjucks) in the context of content management. * Experience with Node-based tooling and build systems (Gulp, Grunt) and writing Unit Tests (Mocha/Chai). Applied experience with build process implementation in a continuous implementation environment preferable. * Comfortable with Git version control and using command line interfaces (CLI). * Comfortable with using image editing software (e.g. Adobe Creative Suite), interactive prototyping tools (UX Pin), and asset optimization. * Detail-oriented, communicative to stakeholders, and able to effectively manage time and priorities. **Set Yourself Apart:** * Prior digital agency or consultancy experience. * Experience with Accessibility Concepts and Implementation (Section 508, WCAG 2.0, ARIA). * Experience with Web Components and modular build tactics such as Atomic Design. * Exposure to or experience with Ruby and/or Python.