Frontend Engineer, Growth & Engagement Team

Role Description

As a core member of Phantom's Growth & Engagement team, you will build and operate the backend systems that power rapid experimentation, personalized engagement features, and scalable growth initiatives. You'll own services for action cards, referral flows, push-notification pipelines, and onboarding enhancements ensuring each feature can be launched, measured, and iterated on with minimal friction.

Responsibilities

• Experimentation Platform: Design, implement, and maintain a feature-flag and A/B-testing framework that supports rapid launch, metric collection, and automated rollback of growth experiments.
• Service Development: Build and scale microservices for key growth features: referral program APIs, action-card engine, push-notification orchestration.
• Instrumentation & Analytics: Instrument all services with real-time metrics, tracing, and logging; partner with Data teams to ensure clean event schemas and dashboarding.
• Operational Excellence: Own on-call rotations for growth services, define SLAs, write playbooks for incident response, and drive post-mortem action items.
• Cross-Functional Collaboration: Partner closely with Product, Frontend, Design, and Analytics to translate hypotheses into backend solutions, remove blockers, and deliver end-to-end experiments.
• Performance & Reliability: Ensure all growth systems meet sub-100ms latency targets under load and maintain ≥99.9% uptime.

Qualifications

• 7+ Years of Backend Experience: Demonstrated success in building large-scale, high-availability systems in Node.js, TypeScript, NestJS (or similar frameworks).
• Web3/Crypto Knowledge: Familiarity with on-chain data, wallet integrations, or decentralized application patterns is strongly preferred.
• Strong System Design & Architecture Skills: Ability to translate product requirements into scalable, maintainable solutions, with a keen eye for performance trade-offs and fault tolerance.
• Leadership & Communication: Experience mentoring engineers, leading technical initiatives, and collaborating effectively with cross-functional teams.

Why Work with Us

• Opportunity: We are a team of experienced builders in the blockchain and crypto industry. Our journey began from users seeking an easy, seamless path to accessing the crypto ecosystem. This passion fueled our exponential growth, allowing us to onboard over 16M+ active users in just over three years; with our user base growing weekly. Our dedication to a secure and seamless user experience has made us the leading wallet on Solana as well as our multi-chain approach enhances our platform's versatility, meeting the needs of a diverse and growing user base. By staying at the forefront of technology and user expectations, we continue to innovate and set industry standards.