TheWhiteam
TheWhiteam
201 – 500 Employees
ConsultingLogisticsMarketing
Founded in 2012, TheWhiteam is a technology consulting firm that helps organizations improve business profitability through effective information technology. Its work includes IT consulting and staffing for enterprise and public-sector clients, with expertise spanning cloud architecture, data center operations, backend and full-stack development, and HR platforms such as SAP SuccessFactors. TheWhiteam recruits technology professionals for flexible remote and on-site roles across multiple locations.

Senior Backend Developer, Java and Spring Batch – Remote in Spain

Modernize COBOL mainframe systems into Java and Spring Batch architectures while applying AI agents, automation, and advanced testing across the software development lifecycle.

Description

  • Analyze COBOL programs and JCL flows to understand dependencies, functional logic, and batch processes
  • Design and implement target architectures using Java, Spring Boot, and Spring Batch
  • Define jobs, steps, readers and writers, chunk processing, restart strategies, error handling, and return codes
  • Create and maintain specifications using Spec-Driven Development approaches
  • Build and optimize AI agents and development automations, including Claude Code, Cursor, and GitHub Copilot Agents
  • Implement validation and functional-equivalence mechanisms between legacy systems and modernized solutions
  • Design and execute testing strategies, including Golden Master, mutation testing, regression testing, and result comparison
  • Analyze quality, productivity, and cost metrics across the development pipeline
  • Propose continuous improvements to architecture, automation, and quality
  • Contribute to a strategic technology-modernization project and develop AI tools and agents for the SDLC

Requirements

  • More than 5 years of Java development experience
  • Strong experience with Spring Core, Spring Boot, Spring Data, and Spring Batch
  • Production experience with complex batch processes, large data volumes, reprocessing, and fault tolerance
  • Knowledge of batch architectures, systems integration, and file processing
  • Ability to analyze COBOL, JCL, copybooks, and embedded SQL
  • Experience applying AI to the development lifecycle, including prompt engineering, AI agents, LLM response evaluation, and hallucination control
  • Experience with advanced testing, including mutation testing, test automation, edge cases, and oracle design
  • Knowledge of Git Bash and Python
  • Comfort working in the terminal and advanced technical environments
  • Professional English is valued
  • Experience in banking mainframe environments, including z/OS, DB2, CICS, IMS, and Control-M, is valued
  • Experience with COBOL-to-Java migrations and legacy application modernization is valued
  • Knowledge of Spec-Driven Development and executable specifications is valued
  • Experience with corporate batch frameworks, APX, Elara, and proprietary banking frameworks is valued
  • Experience building pipelines with MCP, hooks, subagents, and quality gates is valued
  • Experience measuring token cost, generation quality, and AI-assisted productivity is valued

Benefits

  • 23 vacation days per year
  • 14 salary payments: 12 monthly payments plus additional payments in June and December
  • Flexible compensation with childcare vouchers
  • Flexible compensation with medical and dental insurance
  • Flexible working hours
  • Option to work on-site, remotely, or in a hybrid arrangement depending on circumstances
  • Access to leading-edge technologies and ongoing technology updates
  • Opportunity to work from locations worldwide

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