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Oliver BelaifaOB

Oliver Belaifa

Backend Engineer & Tech Lead | Node.js, Kafka, AWS

€800/day
Berlin, DE
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Oliver

I develop and review scalable backend systems hands-on and close to architecture. My focus is on stable, secure data flows, event streaming, and maintainable cloud architectures with AWS, PostgreSQL, and Kubernetes.
  • German

    Native or bilingual

  • English

    Fluent

Can work on-site
Berlin (up to 50km)

Experience

  • Industrieunternehmen (anonymisiert)
    Software Engineer & IT Consultant
    July 2023 - Today (2 years and 11 months)
    Berlin, Germany
    Deployed as Software Engineer & IT Consultant in an industrial project focused on IoT and data-driven maintenance processes. In various roles, I further developed backend components, internal tools, and data processing pipelines.

    The main task was to extend existing event streaming and ETL logic to reliably connect a new, cloud-based technology from an external partner company to the existing system. The challenge was to adapt existing data flows and integrate them stably into the overarching infrastructure.

    Additionally, a local test environment was set up to simulate cloud-based systems. The project was primarily managed remotely.
  • VISI/ONE GmbH
    Tech Lead
    AUTOMOBILE
    August 2020 - June 2023 (2 years and 10 months)
    Berlin, Germany
    Technical lead in the development of scalable cloud and IoT systems with a focus on backend architecture, messaging, and data processing.

    Hands-on responsibility for system design, architectural decisions, prototyping, and the implementation of central backend components.

    I significantly optimized the development process through my own initiative – including unifying all services, full Dockerization, and a local development environment based on Docker Compose, which enabled debugging across multiple services.

    In a later step, the environments were migrated to Kubernetes to enable production-like testing and scaling.

    Collaboration with internal and external teams to successfully implement technical requirements.
  • LIQID Investments GmbH
    Software Architect & interim Backend Team Lead
    BANKING AND INSURANCE
    May 2019 - May 2020 (1 year)
    Berlin, Germany
    Software Architect and interim Lead Backend Engineer for the migration of a Ruby-on-Rails monolith to distributed Node.js-based cloud services.

    Responsible for software and API design, architectural decisions, and the technical direction of the backend.

    Integration of Auth0 as a central identity management system into a new, maintainable microservice architecture.

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Education

  • Diplom-Ingenieur (equivalent to Master of Science) in Computer Engineering
    TU Berlin
    2017

Skill set

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