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Behzad AshrafianiBA

Behzad Ashrafiani

Senior Backend Engineer: Kotlin, Kafka, AWS

€550/day
Berlin, DE
8-15 years

Average response time: 1 hour

About Behzad

Are you struggling with scalability bottlenecks, high AWS costs, or a slow migration from Java to Kotlin? That’s where I step in.

As a Senior Backend Engineer, I don't just write code; I design and implement resilient systems that handle millions of events securely and efficiently. My focus is on speed, stability, and clean architecture.

How I can help your team:

Architecture & Scale: Designing Event-Driven Architectures using Apache Kafka and AWS to handle high-load traffic.

Modernization: Leading migration strategies from monolithic Java legacy code to modern Kotlin microservices.

Performance: Identifying bottlenecks in your backend and optimizing queries and resource usage to cut infrastructure costs.

Mentorship: Elevating your current team's standards through code reviews and best practices in CI/CD and TDD.

My Core Tech Stack:
Languages: Kotlin (Expert), Java
Data & Messaging: Apache Kafka, PostgreSQL, Redis, NoSQL
Cloud & DevOps: AWS (EC2, S3, Lambda, Kinesis), Docker, Kubernetes, Terraform

I am available for contract work to help you clear your backlog, architect new features, or stabilize your core platform. Let’s build something solid.
  • German

    Basic

  • English

    Fluent

  • Persian

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • FLIXBUS GMBH.
    SENIOR SOFTWARE ENGINEER
    February 2022 - Today (4 years and 4 months)
    Berlin, Germany
    Modernized legacy backend systems into Kotlin-based microservices, improving scalability and maintainability. Designed Kafka event schemas and data pipelines to enable reliable, event driven communication. Built Terraform-managed AWS infrastructure for secure and automated deployments. Delivered high-quality data services and APIs, ensuring accuracy and consistency across systems. Enhanced CI/CD pipelines and testing, reducing release issues and improving delivery speed. Defined service boundaries and data ownership, driving clarity and long-term platform stability. Skilled in leading cross-functional teams to deliver high-quality software solutions on time. Expert in cloud technologies such as AWS and Azure for deploying and optimizing applications.
    Kotlin Apache Kafka CI/CD Management Event-driven architecture Java
  • MOMOX SE.
    SOFTWARE ENGINEER
    December 2019 - February 2022 (2 years and 2 months)
    Berlin, Germany
    Experienced software engineer with a strong background in developing scalable web applications. Proficient in multiple programming languages including Java, Python, and JavaScript. Demonstrated ability to work in agile development environments and collaborate with cross-functional teams. Skilled in problem-solving and optimizing code for performance and efficiency. Passionate about implementing best practices in software development and code reviews.
  • INSTAFREIGHT GMBH.
    SOFTWARE DEVELOPER
    March 2018 - December 2019 (1 year and 9 months)
    Berlin, Germany
    Dynamic Software Developer with over 5 years of experience in the logistics industry, specializing in freight management solutions. Proficient in developing scalable software applications that enhance operational efficiency in the instafreight sector. Skilled in utilizing modern programming languages such as Java, Python, and JavaScript to deliver high-quality code. Experienced in integrating APIs for seamless communication between various logistics platforms and third-party services. Strong understanding of Agile methodologies and experience working in cross functional teams to deliver projects on time.

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Education

  • BACHELOR
    UNIVERSITY OF MASHHAD.
    2008
    BACHELOR

Skill set

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