Full Stack Engineer, Experimentation

About the Job: LaunchDarkly is seeking a skilled Full-Stack Engineer to join our Experimentation team! You’ll collaborate closely with a cross-functional team of backend, frontend, and full-stack engineers, along with product managers, data scientists, and designers, to help build an experimentation platform that balances power and accessibility. In this role, you’ll contribute to the design, development, and maintenance of scalable, performant services using Go and RESTful APIs, and user experiences built with React and TypeScript. You’ll have opportunities to take ownership of projects, grow your technical expertise, and help improve the quality and reliability of our systems. We’re focused on building a best-in-class experimentation platform that enables customers to run impactful, data-driven experiments with ease and confidence, and we’re actively growing the team to deliver on this vision. We are committed to delivering a leading experimentation platform that empowers our customers to run tests and data-driven experiments seamlessly and at scale. We have a robust product roadmap, and we are actively expanding our teams to execute on it. Responsibilities: Contribute to the design, development, and maintenance of scalable and performant solutions for experimentation and data-driven products, with attention to usability and maintainability. Collaborate with senior engineers on architectural decisions that impact system scalability and performance. Lead limited scope features from definition to deployment Help identify and troubleshoot performance issues and participate in efforts to optimize service reliability. Work closely with product managers, engineers, data scientists, and designers to implement new features and iterate on existing functionality. Participate in code reviews to support code quality and share constructive feedback with teammates. Write clean, maintainable, and well-tested code that enhances the reusability and readability of team systems. Contribute to the team’s efforts to improve observability, monitoring, and operational excellence. Help investigate and resolve production issues, occasionally partnering with customer support or other teams as needed. Collaborate across functions to align on priorities, surface blockers, and improve team workflows. Learn from and support more senior engineers, and contribute to a culture of growth, inclusion, and continuous improvement. Stay current with industry trends related to software development, experimentation, and backend technologies. Demonstrate curiosity, creative thinking, and a proactive mindset in problem-solving. Qualifications: 5+ years of hands-on experience building full stack web applications. Familiarity with Typescript, React, Node, and Go is preferred but not required. Solid grasp of software engineering principles, design patterns, and coding best practices. Exposure to building or maintaining scalable, production-grade systems. Familiarity with observability practices and tools (e.g., logging, metrics, monitoring). Experience working with cloud platforms (AWS, GCP, or Azure) is a plus. Strong collaboration and communication skills with a team-oriented mindset. Comfortable working in Agile development environments. Experience with CI/CD practices and tools. Passion for writing high-quality code and continuously improving engineering practices. A self-motivated approach and willingness to take initiative. Ability to thrive in a fast-paced, evolving environment. Prior experience working with or contributing to distributed teams is a plus. Pay: Target pay ranges based on Geographic Zones* for Level 3: Zone 1: San Francisco/Bay Area or NYC Metropolitan Area, Boston, Seattle - $171,200 - $235,400** Zone 2: Irvine, LA, Monterey, Santa Barbara, Santa Rosa, Austin, Portland, Philadelphia, Chicago - $154,100 - $211,860** Zone 3: All other US locations - $ 145,500 - $200,090 ** LaunchDarkly operates from a place of high trust and transparency; we are happy to state the pay range for our open roles to best align with your needs. Exact compensation may vary based on skills, experience, and location. *Within the United States, our geographic pay zones are defined by counties surrounding major metropolitan areas. **Restricted Stock Units (RSUs), health, vision, and dental insurance, and mental health benefits in addition to salary. About LaunchDarkly: Modern software delivery was supposed to be the foundation for a thriving digital business but reality has proven otherwise. Slow, inefficient development cycles, costly outages, and fragmented customer experiences are preventing developers from building their best software. The LaunchDarkly platform helps developers innovate on new features faster while protecting them with a safety valve to instantly rewind when things go wrong. Developers can target product experiences to any customer segment and maximize the business impact of every feature. And by gradually rolling out new application components, they escape nightmare "big-bang" technology migrations. The LaunchDarkly platform was built to guide engineers to the next frontier of DevOps by: Improving the velocity and stability of software releases, without the fear of end customer outages Delivering targeted experiences by easily personalizing features to customer cohorts Maximizing the business impact of every feature through the ability to experiment and optimize Coordinating the release and optimization of software to provide consistent experiences across mobile platforms and device types Improving the effectiveness and productivity of engineering teams, by providing insights into engineering cadence and stability At LaunchDarkly, we believe in the power of teams. We're building a team that is humble, open, collaborative, respectful and kind. We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, gender identity, sexual orientation, age, marital status, veteran status, or disability status. LD invites any applicant to review our written Affirmative Action Plan. To do so, contact People Ops at hr@launchdarkly.com . Do you need a disability accommodation? Fill out this accommodations request form and someone from our People Operations team will contact you for assistance. Your safety matters to us. To protect yourself from potential scams, LaunchDarkly recruiters will only contact you from @ launchdarkly.com email addresses or via LinkedIn from "Verified Recruiter" accounts. Be cautious of emails from other domains. Legitimate LaunchDarkly recruiters will never ask for money, fees, or banking information before making a job offer. LaunchDarkly will never make a job offer without conducting a formal interview process. Our interview process does not involve asking detailed questions by email. If you are ever unsure about a communication that you receive, don't click any links—visit Careers | LaunchDarkly directly for confirmed job openings and links to apply. Please notify us of any fraudulent representation by sending an email to careers@launchdarkly.com .