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Senior Backend Developer
Hamburg, Germany - Full-time
  • About fanblast
    fanblast is a fast-growing SaaS that connects creators with their fans through WhatsApp and SMS. We empower influencers and creators to build meaningful fan relationships, monetize exclusive content, and foster genuine engagement. Our product focuses on ease of use, seamless monetization, and scalability, transforming the way creators connect with their audience. With a collaborative, agile, and creative work culture, each team member's input helps shape our innovative product. Join fanblast, where your work will help define the future of creator-fan interactions and bring real value to influencers across various industries, including entertainment, social media, and more.

    We are seeking an experienced Senior Backend Developer to join our engineering team. You will be responsible for designing, developing, and maintaining scalable backend services that power our tool. This role involves working with a modern microservices architecture, integrating with third-party services, and ensuring high performance and reliability of our backend systems.
  • Responsibilities
    • Design, develop, and maintain robust, scalable backend APIs and microservices
    • Architect and implement efficient database schemas and queries for PostgreSQL
    • Implement caching strategies using Redis to optimize application performance
    • Build and maintain message queue integrations using RabbitMQ and NATS
    • Integrate with third-party payment processors (Stripe, Solidgate, PayPal)
    • Develop and maintain integrations with messaging platforms (Telegram, WhatsApp)
    • Implement media processing pipelines and services
    • Write clean, maintainable, and well-documented TypeScript/JavaScript code
    • Collaborate with frontend developers and other team members to deliver features
    • Participate in code reviews and maintain high code quality standards
    • Debug and resolve production issues in a timely manner
    • Optimize application performance and scalability
    • Design and implement RESTful APIs following best practices
    • Work with Docker and containerized applications
    • Implement proper error handling, logging, and monitoring
  • Required Technical Skills
    Core Technologies

    Technology

    Proficiency

    Key Responsibilities / Experience

    Node.js (v24+)

    Advanced proficiency

    Building high-performance, scalable applications

    TypeScript

    Strong experience

    Type-safe development and large-scale application maintenance

    Express.js

    Strong experience

    Building RESTful APIs and web services

    JavaScript (ES6+)

    Strong experience

    Modern JavaScript features and best practices


    Databases & Data Storage

    Technology

    Focus

    PostgreSQL

    Database design, query optimization, migrations

    Redis

    Caching strategies, session management, pub/sub

    Couchbase

    NoSQL/document database operations


    Message Queues & Event Systems

    System

    Role

    RabbitMQ

    Message queue implementation and management

    NATS

    Event-driven architecture and messaging


    Infrastructure & DevOps

    Tool / Concept

    Application

    Docker

    Containerization and Docker Compose

    Microservices Architecture

    Designing and maintaining service-oriented systems

    Nginx

    Reverse proxy configuration and load balancing

    Linux/Unix

    Server administration and deployment


    Third-Party Integrations

    Integration Type

    Specific Experience

    Payment Processing

    Stripe, Solidgate, PayPal integration experience

    Messaging Platforms

    Telegram Bot API, WhatsApp integration

    Cloud Services

    AWS SDK, Superbase & Betterstack

    API Integration

    RESTful APIs, webhooks, authentication


    Development Tools & Practices

    Practice / Tool

    Requirement

    Git

    Version control and collaborative development

    Yarn/NPM

    Package management

    Code Quality

    ESLint, Prettier, code review practices

    Testing

    Unit testing, integration testing

    API Documentation

    OpenAPI/Swagger, API design best practices



    Preferred Qualifications
    • 5+ years of professional backend development experience
    • Experience with microservices architecture and service communication patterns
    • Strong understanding of database design principles and query optimization
    • Experience with payment gateway integrations and PCI compliance considerations
    • Knowledge of real-time messaging systems and WebSocket protocols
    • Experience with media processing and file uploads
    • Understanding of security best practices (authentication, authorization, encryption)
    • Experience with monitoring, logging, and observability tools
    • Familiarity with CI/CD pipelines and automated deployment processes
    • Experience working in agile development environments

    Nice to Have
    • Experience with GraphQL APIs
    • Knowledge of Kubernetes for container orchestration
    • Experience with message broker patterns (pub/sub, queues)
    • Understanding of event sourcing and CQRS patterns
    • Experience with performance testing and optimization
    • Knowledge of internationalization (i18n) implementation
    • Experience with WebRTC or real-time communication protocols
  • Why you should join us
    • Great workplace in the center of Hamburg (hybrid: 3 days per week in office).
    • Flat hierarchies, fair compensation & flexible working hours
    • You'll be part of an ambitious team that values speed, persistence and results.
    • You'll work with top creators, helping them transform how they connect and monetize.
    • fanblast is at the center of the creator economy boom — a $250B+ market that's reshaping culture.
    • We're a startup with momentum: lean, ambitious, and ready to scale
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