Back to jobs
Regional hiringpublishedExternal employer
PPhantom
PhantomCrypto Wallet

Backend Engineer

Growth & Engagement Team

Location

Germany

Work type

Remote

Employment

Full Time

Experience

7+ years

Compensation

Compensation not disclosed

Posted

13h ago

Summary and responsibilities

Role overview

Summary

As a Backend Engineer on Phantom's Growth & Engagement team, you will design, implement, and maintain backend systems for rapid experimentation, personalized engagement features, and scalable growth initiatives. This includes building microservices for referral programs, action cards, and push notifications, ensuring high performance and reliability.

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

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 on self-custodial crypto wallets.

There has never been a better time to work in crypto to help shape the future of innovation with a focus around the wallet experience!

First impressions matter: Wallets are responsible for a users first impression with crypto and onboarding new users into crypto. By ensuring that a user has a great first-time experience with crypto, we can help supercharge the growth of the entire ecosystem.

Make crypto easier to navigate: There is no easy way for a user to discover and navigate all that crypto has to offer. Wallets have a unique opportunity to help users not only onboard to crypto but also stay retained by exploring new things to do.

We live in a multi-chain world: We currently support Solana, Ethereum, Polygon and Bitcoin with more networks to come in the new future. We are focused on creating a unified, multi-chain crypto experience for users.

Updated 13h ago

Candidate fit

Skills and qualifications

Additional skills

Backend Development • 1+ yrs
System Design • 1+ yrs
Architecture • 1+ yrs
Microservices • 1+ yrs
Feature Flags • 1+ yrs
A/B Testing • 1+ yrs
Real-time Metrics • 1+ yrs
Tracing • 1+ yrs
Logging • 1+ yrs
Incident Response • 1+ yrs
Performance Optimization • 1+ yrs
Fault Tolerance • 1+ yrs
On-chain Data • 1+ yrs
Wallet Integrations • 1+ yrs
Decentralized Application Patterns • 1+ yrs
Node.js • 1+ yrs
TypeScript • 1+ yrs
NestJS • 1+ yrs
Experimentation • 1+ yrs
Cross-Functional Collaboration • 1+ yrs
Leadership • 1+ yrs
Communication • 1+ yrs
Mentoring • 1+ yrs
Collaboration • 1+ yrs

Experience

7+ years

How this role is positioned

Role classification

Job domains

Software Engineering

Industries

Finance & Banking

Employment

Full Time

Contract duration

Permanent

Hiring type

Direct

Global hiring

Location specific

Offer details

Compensation and benefits

Compensation

Compensation not disclosed

VisibilityShared on listing
CurrencyUSD
PeriodYearly

Benefits and perks

Dental Insurance
Vision Insurance

Location, schedule, and role shape

Work setup

Work conditions

Primary locationGermany
Work typeRemote
Global hiringNo

Bandwidth profile

peopleHigh8/10
physicalLow2/10
cognitiveHigh9/10
executionHigh9/10
creativityMedium7/10
uncertaintyMedium7/10
communicationHigh8/10

Context on the employer

Company snapshot

Company

Phantom

Team size

Growing team

Location

Germany

Phantom is the modern money app used by tens of millions around the world, combining everything people need to manage, spend, and grow their money in one simple, intuitive experience. It brings the control and flexibility of crypto-powered finance into mainstream consumer finance with industry-leading security and thoughtfully designed tools. Phantom is revolutionizing how millions interact with the crypto ecosystem through its self-custodial wallet, offering a seamless, unified experience across Solana, Bitcoin, Ethereum, and Polygon, and has achieved significant milestones including surpassing 16 million MAU’s and ranking as a Top 50 app.

Visit website

Backend Engineer

GermanyFull Time