Senior Frontend Engineer

Apollo.io is the leading go-to-market solution for revenue teams, trusted by over 500,000 companies and millions of users globally, from rapidly growing startups to some of the world's largest enterprises. Founded in 2015, the company is one of the fastest growing companies in SaaS, raising approximately $250 million to date and valued at $1.6 billion. Apollo.io provides sales and marketing teams with easy access to verified contact data for over 210 million B2B contacts and 35 million companies worldwide, along with tools to engage and convert these contacts in one unified platform. By helping revenue professionals find the most accurate contact information and automating the outreach process, Apollo.io turns prospects into customers. Apollo raised a series D in 2023 and is backed by top-tier investors, including Sequoia Capital, Bain Capital Ventures, and more, and counts the former President and COO of Hubspot, JD Sherman, among its board members.Your Role & Mission As a Senior Frontend Engineer, you will be a critical part of our growing company, working on a cross-functional team to implement and drive best practices in technology, architecture, and process. You'll have the chance to work in an open and collaborative environment, receive and give hands-on mentorship and have opportunities to grow and accelerate your career. You love both learning and teaching. In this role, you will be interfacing with product, design, software engineers, and members in teams outside of Engineering. You enjoy working cross functionally to solve hard problems and make an impact. At Apollo, you strive for quality, and are obsessed with improving quality, automation, and squashing any bugs that sneak through. You have a drive to constantly investigate performance improvements and innovative ideas. Daily Adventures & Responsibilities Work closely with product, design and engineering team to design and contribute to core product initiatives. Produce "clean" and well-structured code, with detailed specifications. This means that your code is commented, well structure, readable and comes with documentation. Implement "pixel perfect" design as delivered by our designers that works across different browsers, according to specifications provided Help maintain code quality, organization, automation and continuous delivery Effectively communicate development progress or blockers to the product lead, engineering manager, and other stakeholders Work effectively as part of a large global team Attend and engage in stand-ups, team meetings, and manager 1:1s Provide and receive constructive feedback and praise to co-workers in verbal and written form; respond and react to technical and behavior feedback from managers and peers Competencies Proactively acts without being told what to do. Able to identify areas of improvement and driving best practices to deliver high quality, performant, and scalable solutions. Ability to take ownership over everything you ship; you'd never call code "released" until you’re confident it’s correct You usually communicate effectively, clearly, concisely and in an audience-oriented way in written and verbal form both technical and non technical subjects, to your teammates. You actively listen to others and ensures they are understood. You pay attention to nonverbal communication. You help your teammates overcome obstacles, resolve blockers, and complete work tasks. You give or share credit where due. You deliver praise and constructive feedback to your team, teammates, and manager in a useful manner. You actively seek out feedback from your teammates and manager, and works to use feedback that you receive as a tool for growth. Confident in owning your role, and bringing creative ideas to the hands of our users Skills & Relevant Experience BS in Computer Science, or equivalent Minimum 5 years of total experience as Software Engineer in frontend development; at least 1-2 years in senior position, developing large-scale applications Solid understanding of core JavaScript (ES6), React, Redux, HTML, CSS, and TypeScript Strong attention to detail Understanding of REST APIs Experience with Cypress in writing meaningful tests Interest in building UI with performance, accessibility and scalability in mind Strong UX and product sense with the ability to negotiate the right MVP Your code is comprehensible, well-structured, highly performant Strong knowledge of Frontend Architecture and System Design Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, andproductivity optimization Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technologies Our tech stack is React/Redux/NodeJS on the frontend, Ruby/Ruby on Rails/MongoDB/Elasticsearch on the backend, and Kubernetes/Docker/Ansible/Terraform in infrastructure. Apollo.io Tech Blog: Deep dives into engineering, product design, and company-culture stories from the Apollo team, offering behind-the-scenes insight into how Apollo builds and scales its B2B sales platform. We are AI Native Apollo.io is an AI-native company built on a culture of continuous improvement. We’re on the front lines of driving productivity for our customers—and we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here. Why You’ll Love Working at Apollo At Apollo, we’re driven by a shared mission: to help our customers unlock their full revenue potential. That’s why we take extreme ownership of our work, move with focus and urgency, and learn voraciously to stay ahead. We invest deeply in your growth, ensuring you have the resources, support, and autonomy to own your role and make a real impact. Collaboration is at our core—we’re all for one, meaning you’ll have a team across departments ready to help you succeed. We encourage bold ideas and courageous action, giving you the freedom to experiment, take smart risks, and drive big wins. If you’re looking for a place where your work matters, where you can push boundaries, and where your career can thrive—Apollo is the place for you.  Learn more here!