Senior Fullstack Engineer (L6, FE-heavy) - 100% remote
First seen by Alion on Oct 23, 2026. Apollo.io scores A on the Alion truth index.
As a Senior Software Engineer on the Growth team, you will be a critical part of our growing company, working at the intersection of engineering, product, marketing, and data science to accelerate product growth through rapid experimentation, data analysis, and scalable technical solutions. You’ll implement and drive best practices in technology, architecture, and process while optimizing funnels, automating growth loops, and shipping features that drive measurable impact.
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, enjoy working cross-functionally to solve hard problems, and strive for quality — obsessing over automation, performance, and squashing any bugs that sneak through.
Our tech stack: Ruby/RoR, React.js, TypeScript, Redux, Node.js, Python, MongoDB, Elasticsearch, Ansible, Terraform, Grafana, Kibana, Docker, Kubernetes, AWS/GCP, GitHub Actions.
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.
What we offer:- Base salary + 10% yearly bonus + equity
- Contract of employment (Polish UoP) + AKUP 50% tax deductible costs with 70% creativity factor for the Eng roles
- 100% remote work (we don’t have offices and we don’t plan to have them), no hybrid, no forcing people to get back to the offices
- Allianz Medical Package and Warta Life Insurance covered by Apollo
- 1200 USD educational budget
- 300 USD Work From Home Stipend
- 4 additional PTO days for Engineering (Rest Days)
- 100% remote work and flexible working hours
Besides the great compensation package and culture that thrives in openness and excellence, we invest tremendous effort into developing our remote employees’ careers. The team embraces that we have a sole purpose: to help customers maximize their full revenue potential on the Apollo platform. This mindset opens us up to a lot of creative approaches to making customers successful at scale. You’ll be a significant part of a lean, remote team, empowered to really own your role as a proactive educator. We’re very collaborative at Apollo, so you’ll be able to lean on your teammates, even in adjacent departments, to help you achieve lofty goals. You’ll be supported and encouraged to experiment and take educated risks that lead to big wins. And, you’ll have a whole team remotely by your side to help you do it!
Zakres obowiązków
- Develop and execute engineering strategies that enable rapid experimentation and data-driven decision-making
- Collaborate cross-functionally with Product, Design, Marketing, Data Science, and Engineering to optimize key growth metrics and contribute to core product initiatives
- Architect and build scalable systems that support growth initiatives, such as onboarding flows, personalization engines, and viral loops
- Implement A/B testing and data instrumentation to ensure accurate tracking and measurement of experiments
- Leverage automation and machine learning to optimize user engagement, reduce churn, and personalize user experiences
- Produce clean, well-structured, well-documented code and implement pixel-perfect designs that work across browsers, per spec
- Help maintain code quality, organization, automation, and continuous delivery
- Ensure technical excellence through best practices in performance optimization, security, and scalability
- 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
- Give and receive constructive feedback and praise
Wymagania
QUALIFICATIONS:- 8+ years of industry experience in frontend or full-stack development, building large-scale applications
- Proficiency in JavaScript (ES6)/TypeScript, React, Redux, HTML, CSS, and at least one backend language (Ruby/RoR, Python, or Node.js)
- Proven experience leveraging AI tools to enhance software development (code generation, debugging, productivity optimization), with fluency integrating AI-driven solutions into your workflow and a willingness to stay current with emerging AI technologies
- Experience with cloud infrastructure (AWS/GCP) and REST APIs
- Experience with analytics tools (Amplitude, Mixpanel, Google Analytics) and A/B testing platforms (e.g., Optimizely, LaunchDarkly, Segment)
- Familiarity with growth frameworks (e.g., Pirate Metrics, viral loops)
- Strong UX and product sense, with the ability to negotiate the right MVP
- Strong analytical and problem-solving skills
- Experience with growth at a startup or scaling product
- Knowledge of SEO, CRM tools (Braze, HubSpot), or marketing automation
Tech stack
- JavaScript
- React
- TypeScript
- Redux
- HTML
- CSS
- REST API
- Ruby on Rails
- Amplitude
- Mixpanel
- Google Analytics
- A/B Testing
- Optimizely
- LaunchDarkly
- Segment
- Growth Frameworks
- Pirate Metrics
- CRM