Senior Growth Engineer

New York, NY Pelago is the world’s leading virtual clinic for Substance Use Management. Our program provides guidance, support and treatment for members seeking to overcome their tobacco, alcohol and opioid use. From unhealthy habits to active substance use disorders, Pelago delivers a personalized solution based on individual health, habits, genetics, and goals, providing care for members wherever they might be on the substance use spectrum. Pelago's suite of virtual services ranges from education, to cognitive behavioral therapy (CBT) to comprehensive medication-assisted treatment (MAT). Pelago enables employers and health plans to deliver accessible, affordable, and effective treatment for substance misuse. Pelago has scaled to helping hundreds of employers and health plans and has already helped more than 750,000 members manage their substance use better. We have recently closed our Series C and raised over $151m from leading global investors. If you are passionate about making an impact on the health of others, join us and make it happen!

About Pelago Engineering:

Our engineering team operates as empowered, outcome-oriented problem solvers, working in close partnership with product, design, and clinical teams to improve member outcomes at scale. As AI transforms how software is built, we are intentionally evolving our development lifecycle so we spend less time on mechanical implementation and more time on system design, judgment, and impact.

How We Work:

• Outcome-driven: Engineers are given problems to solve, not just features to build. Success is measured by learning, impact, and outcomes—not velocity alone
• AI-native: We use AI across the SDLC to accelerate implementation, testing, and review. Engineers focus on defining intent, validating behavior, and designing resilient systems
• High autonomy, high accountability: Teams have real ownership over their domains. With autonomy comes responsibility for quality, safety, and results
• Cross-functional by default: Engineers partner deeply with Product, Design, Data, and Clinical. Discovery, experimentation, and delivery are shared responsibilities
• Quality and safety matter: We build in a regulated, member-impacting domain. Reliability, observability, and correctness are first-class concerns

What You’ll Do:

Instead of task lists, anchor on ownership:

• Own meaningful problem spaces end-to-end, from discovery through delivery and iteration
• Design and evolve systems that support safe, scalable, AI-augmented development
• Use data and experimentation to validate whether solutions actually work
• Collaborate cross-functionally to balance member impact, clinical constraints, and technical tradeoffs
• Shape how we work—our tools, processes, and culture

What We Look For:

We explicitly assess for empowerment:

• You start with "why" before diving into "how"
• You're energized by ambiguity and collaborative problem-shaping
• You use AI to amplify your judgment and move faster on what matters
• You think in systems and anticipate second-order effects
• You want to own outcomes, not just ship features

Overview of the Role:

Pelago is hiring a Senior Growth Engineer to build and optimize the technical systems that power member acquisition activation & early engagement.This role sits at the intersection of engineering product & marketing.You will own the code & infrastructure behind our highest-impact growth surfaces landing pages registration flows onboarding journeys & experimentation systems with direct accountability for measurable business outcomes. As a growth driver you will identify funnel opportunities propose & ship experiments & turn performance data into product decisions that increase conversion & member growth. This is a full-stack role with a frontend lean ideal for an engineer who thinks like a product owner thrives in fast experimentation cycles & wants to see their work directly move company-level metrics. This is a hybrid role with a high-collaboration rhythm (3 days/week in our NYC office).

In this role you will:

• Own & optimize Pelago’s highest-impact growth surfaces — including landing pages registration flows onboarding experiences & other key conversion pathways across web & mobile.
• Design build & iterate on A/B tests & multivariate experiments using both traditional experimentation frameworks & AI-assisted approaches to increase testing velocity & insight generation.
• Leverage AI tools & automation to accelerate prototyping personalization & experimentation across growth surfaces.
• Translate acquisition & campaign strategy into high-performing technical execution partnering closely with Marketing & Product to move conversion & activation metrics.
• Ensure comprehensive instrumentation & analytics coverage across the funnel so every change is measurable & insights drive prioritization.
• Continuously improve performance SEO accessibility & Core Web Vitals to maximize traffic efficiency & conversion.
• Ship quickly while maintaining reliability privacy & compliance in a regulated healthcare environment where member trust is non-negotiable.

The background we are looking for:

• Strong proficiency in React & TypeScript with experience building performant user-facing web applications.
• Experience implementing & iterating on A/B tests to improve conversion & user flows.
• Comfort working across the stack (APIs backend services analytics instrumentation) to ship end-to-end growth improvements.
• Data-informed mindset including event tracking & funnel analysis to guide experimentation & prioritization.
• Familiarity with AI-assisted development workflows (e.g., agentic coding tools prompt-driven prototyping automation tooling) & a demonstrated ability to use AI to increase iteration speed & engineering leverage.
• Experience collaborating with product & marketing partners in fast-paced experimentation-driven environments.

What you’ll love about us:

We have a whole host of perks for our people! From life essentials to nice-to-haves there are more than a few good reasons to love working with us. We strive to ensure Pelago employees have equitable access to healthcare wellbeing time away & then some.

• Generous and meaningful equity package
• Full Medical Dental & Vision coverage
• 401k Plan
• Unlimited PTO Policy 10 paid holidays & company wide “Me Time” Days
• Paid maternity paternity & new parent leave
• Flexible working environment
• Annual Learning and Development stipend to support continued learning and career development
• Wellness Reimbursement Program
• Access to Reproductive & Family Planning Care
• Substance Use Support for employees and family members

At this time we are unable to offer visa sponsorship for this position. Please note that Pelago is dedicated to providing accommodations to candidates upon request. If you need accommodations at any point throughout the interview process please reach out to your recruiter.