Full Stack Engineer, Experimentation

Mixpeek; United States; On-site; USD 145,000 - 235,000; Full time

Benefits offered by this job

RSUs

Health, Vision, Dental insurance

Mental health benefits

Job summary

LaunchDarkly is hiring a Full-Stack Engineer to contribute to an experimentation platform. You will build scalable services with Go and RESTful APIs, and front-end experiences with React and TypeScript.

You’ll collaborate with cross-functional teams on architecture, feature delivery, and reliability. You’ll own parts of projects, grow technical expertise, and help improve system quality while staying aligned with the team’s vision for data-driven experimentation at scale.

Qualifications

• 5+ years of hands-on experience building full stack web applications.
• Familiarity with TypeScript, React, Node, and Go is preferred but not required.
• Experience with cloud platforms and building scalable systems.

Responsibilities

• Contribute to design, development, and maintenance of scalable solutions for experimentation and data-driven products.
• Collaborate with senior engineers on architectural decisions impacting scalability and performance.
• Lead limited scope features from definition to deployment.
• Identify and troubleshoot performance issues and help optimize reliability.
• Work with product managers, engineers, data scientists, and designers to implement new features.
• Participate in code reviews to support code quality and provide feedback.
• Write clean, maintainable, well-tested code enhancing readability of systems.
• Improve observability, monitoring, and operational excellence.
• Investigate and resolve production issues, coordinating with customer support as needed.
• Collaborate across functions to align priorities and improve team workflows.
• Learn from senior engineers and contribute to a culture of growth and inclusion.
• Stay current with industry trends in software development, experimentation, and backend technologies.
• Demonstrate curiosity and proactive problem-solving.

Skills

TypeScript

React

Go

Node.js

RESTful APIs

AWS

Tools

CI/CD tooling

AWS

GCP

Azure

Job description

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 Affiantive Action Plan. To do so, contact People Ops at [e-mail].

Do you need a disability accommodation? Fill out this accommodations request form and someone from our People Operations team will contact you for assistance.