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Stan ZaitsevSZ

Stan Zaitsev

Senior Fullstack Developer

400 €/Tag
Frankfurt am Main, DE
15+ Jahre

Durchschnittliche Reaktionszeit: 1h

Über Stan

I help companies design and scale reliable systems. With 16+ years in software development and 9 years in leadership, I bring strong Java backend expertise combined with solid full-stack experience and a track record of delivering production-ready solutions.

What I do best:
  • Build and optimize microservices (Spring Boot, Hibernate, Kafka, RabbitMQ).
  • Design and repair CI/CD pipelines (GitHub Actions, GitLab, Jenkins, AWS CodePipeline).
  • Migrate legacy monoliths to cloud-native architectures (AWS, Docker, Kubernetes).
  • Work with databases: PostgreSQL, MySQL, MongoDB, Redis — from data modeling to performance tuning.
  • Full-stack development with JavaScript/TypeScript, React, Angular when projects require it.
  • Build engineering teams from scratch: hiring, mentoring, and organizing workflows for efficiency and growth.

Track record highlights:
  • Led backend team building high-load services for a German bank (millions of users).
  • Delivered mobile transaction verification and online ordering/payment platforms.
  • Improved CI/CD workflows, reducing delivery risks and speeding up releases.

I’m not just a developer - I fix bottlenecks, stabilize systems, and grow strong teams. If you need someone who can step into a project, solve critical issues, and set up long-term foundations, let’s talk.
  • Russisch

    Muttersprachlich oder zweisprachig

  • Englisch

    Verhandlungssicher

  • Deutsch

    Grundkenntnisse

Vor Ort möglich
Frankfurt am Main (bis zu 50 km)

Projekt- und Berufserfahrung

  • Agents Inc,
    Outstaff IT Consultant
    DIGITALAGENTUREN & IT-CONSULTING
    Oktober 2022 - Heute (3 Jahre und 8 Monate)
    Berlin, Deutschland
    • Advised on solution architecture and technology strategy, transitioning legacy codebases to modern stacks.
    • Assisted in complex backend development challenges, reviewing and refining critical components for scalability and efficiency.
    • Assisted in hiring and onboarding developers for startup teams, ensuring a smooth integration process and fostering team efficiency.
    Java Scala Play framework Typescript artificial intelligence
  • Excelsior-Solutions,
    Lead Software Engineer
    DIGITALAGENTUREN & IT-CONSULTING
    August 2020 - März 2025 (4 Jahre und 7 Monate)
    Frankfurt, Germany
    • Led a backend team in developing high-load services for a major German bank, supporting millions of users. Led projects such as a mobile transaction verification application utilizing OneSpan Crypto Engine, and a mobile app for user legitimation integrating Regula and IDNow.
    • Migrated the backend from a monolithic to a microservices architecture, collaborating with DevOps to optimize deployment pipelines. Designed and optimized microservices-based backend architectures.
    • Worked closely with cross-functional teams (frontend, design, QA, bank architects) to deliver scalable, production ready solutions.
    • Led the development of an online restaurant ordering platform, overseeing backend architecture (Java 17, Spring Boot, AWS), CI/CD pipeline automation and frontend integration. Developed microservices for payment processing, refunds handling, and billing system management.
    • Enhanced CI/CD workflows across multiple projects by integrating automated code checks, security audits and quality gates using Bitbucket Pipelines, SonarQube, Jenkins and AWS Services (CodePipeline, CodeBuild, CodeDeploy, and CloudFormation as IaC tool).
    • Refined code review and testing processes by setting best practices and enforcing quality standards. Integrated ELK Stack and Grafana for performance monitoring and troubleshooting.
    Java AWS Spring Apache Kafka PostgreSQL
  • 1C-Soft,
    Lead Software Engineer
    September 2019 - August 2020 (11 Monate)
    Moscow, Russia
    • Single-handedly developed a custom Maven plugin to generate Java, TypeScript, and Eclipse Xcore classes from YAML definitions, automating development workflows.
    • Implemented backend and frontend integrations for UI generation, using Java and Angular.
    • Contributed to the development of the company's core platform, focusing on modularization and maintainability.
    Java Spring Angular Typescript Elasticsearch

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Ausbildung und Abschlüsse

  • M.S.: Computer
    National Research University "Moscow Power Engineering Institute"
    2011
    M.S.: Computer
  • 10266 Programming with C#
    Microsoft® .NET
    2012
    10266 Programming with C#

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