Senior AI-Driven Legacy Modernization Engineer

Solid Company; Gdynia; On-site; PLN 180,000 - 260,000; Full time

Job summary

Solid Company in Poland seeks an engineer to design and improve AI agent workflows, prompts, and tooling for legacy application modernization, and to develop automation that analyzes legacy code bases for migration to approved tech stacks.

You will integrate AI-driven migrations with CI/CD pipelines using Tekton, ArgoCD, and Ansible, work with Claude Code and Maister, and contribute to a vendor-agnostic modernization framework.

Qualifications

• Strong programming experience in Python and AI tooling.
• Solid understanding of software engineering fundamentals including Git, code review, testing and maintainable code practices.
• Working knowledge of CI/CD concepts and containerized environments (Docker, Kubernetes).
• Hands-on experience with or strong interest in LLMs, AI-assisted development, prompting, agents and tool use.
• Ability to read and work with code across languages including legacy Java.
• Strong analytical and structured problem-solving skills in ambiguous environments.
• Good communication skills in English and collaborative mindset.

Responsibilities

• Design and improve AI agent workflows, prompts and tooling for legacy application modernisation.
• Develop automation that analyzes legacy code repositories and rewrites applications to approved technology stacks.
• Integrate AI-driven migration workflows with CI/CD and deployment platforms including Tekton, ArgoCD and Ansible.
• Work with agentic coding tools such as Claude Code and Maister.
• Utilize Anthropic and other LLM providers within the modernisation framework.
• Collaborate with application teams to transform migration use cases into repeatable automation.
• Support development of a vendor-agnostic framework for code migration and modernisation.
• Contribute to software engineering, platform automation and applied AI solutions.

Skills

Python

Git

Testing

CI/CD concepts

Docker

Kubernetes basics

LLMs & agents

Multiple-language reading

English communication

Tools

Tekton

ArgoCD

Ansible

Claude Code

Maister

Job description

Solid Company in Poland seeks an engineer to design and improve AI agent workflows, prompts, and tooling for legacy application modernization, and to develop automation that analyzes legacy code bases for migration to approved tech stacks.

You will integrate AI-driven migrations with CI/CD pipelines using Tekton, ArgoCD, and Ansible, work with Claude Code and Maister, and contribute to a vendor-agnostic modernization framework.