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Optiveum

Senior Backend Developer – Java, Python

Optiveum

. Design and implement new features for the Automated Security Retest Engine .

Posted 10/8/2026contractWarsaw • PolandSenior💰 PLN 130 per hourWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in Python and Java development, with a strong focus on backend applications, REST APIs, and automated testing. Proficient in secure software development practices and capable of collaborating effectively with stakeholders to deliver high-quality software solutions.

Highest-signal resume keywords
Python DevelopmentJava DevelopmentREST API DevelopmentAutomated TestingSecure Software Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
PythonJavaSpring BootAutomated TestingGitInput ValidationAuthenticationAuthorizationSQLCI/CD
Soft Skills
Technical Communication
Tools & Technologies
OWASP ZAPNucleiSemgrepPytestDockerCloud ServicesPDF ProcessingOCRJavaScriptHTML
Industry Keywords
Application SecurityVulnerability RemediationSecurity EngineeringDASTSAST

Tech Stack

Tools & technologies
BootstrapCloudDockerJavaJavaScriptMavenPythonSpringSpring BootSpringBootSQL

About the role

Key responsibilities & impact
  • Design and implement new features for the Automated Security Retest Engine
  • Integrate external tools and APIs
  • Improve the reliability and quality of generated tests and analysis
  • Write automated tests, investigate defects, and maintain technical documentation
  • Collaborate with security and product stakeholders to translate requirements into practical, maintainable software
  • Preserve target-scope restrictions, protect credentials and user data, validate inputs, and provide reliable evidence for retest outcomes
  • Develop and maintain a Python-based processing pipeline and a Java Spring Boot web application providing the user interface

Requirements

What you’ll need
  • Professional software development experience in Python and/or Java
  • Experience developing and maintaining backend applications and REST APIs
  • For Java: familiarity with Spring Boot and common application-development practices
  • For Python: familiarity with modular application design, dependency management, and automated testing
  • Proven experience writing and maintaining automated tests
  • Working knowledge of Git and collaborative software-development workflows, including code reviews
  • Understanding of secure software development, including input validation, authentication, authorization, and safe handling of secrets
  • Ability to analyze an existing codebase, troubleshoot issues, and deliver changes with appropriate documentation
  • Good written and spoken English for technical communication
  • Experience with both Python and Java/Spring Boot preferred
  • Experience integrating LLM APIs or building LLM-assisted workflows preferred
  • Familiarity with DAST and SAST preferred
  • Experience with OWASP ZAP, Nuclei, Semgrep, pytest, or security-test automation preferred
  • Experience with PDF processing, OCR, or document extraction preferred
  • Familiarity with JavaScript, HTML, CSS, Bootstrap, or Thymeleaf preferred
  • Experience with SQL databases, Maven, CI/CD, Docker, or cloud services preferred
  • Interest in application security, vulnerability remediation, and security engineering preferred

Benefits

Comp & perks
  • Transparent working conditions
  • Ongoing support from the Optiveum team throughout our cooperation
  • Opportunity to work in an international, highly collaborative environment