AI Engineer - AI SDLC Tooling & Guardrails

SIX Group Services Ltd.; Warszawa; Hybrid; PLN 393,000 - 568,000; Full time

Job summary

SIX Group Services Ltd. is building a new AI-centered SDLC team in Warsaw/Madrid. You will design and implement guardrails for agentic software development, covering test automation, code review, and data governance, ensuring quality and traceability across CI/CD workflows.

We seek hands-on engineers with 6+ years in tooling or platform engineering, experienced in evaluating AI agents and architecting reusable, adoption-focused tooling for multiple business units.

Qualifications

• 6+ years in software engineering with tooling or platform experience.
• Hands-on familiarity with agentic AI architectures and governance.
• Experience evaluating LLM or agent systems is a strong plus.
• Knowledge of test methodology and code quality across CI/CD.

Responsibilities

• Build AI SDLC tooling as a platform capability, not a project.
• Build and operate the AI agent harness with sandboxed execution and CI/CD integration.
• Own the independent review layer for AI-generated code and tests.
• Define and evolve the quality and tooling strategy for an AI-driven SDLC.

Skills

AI SDLC tooling

Test automation

Platform engineering

LLM evaluation

Governance & controls

Tooling adoption

Tools

CI/CD tooling

Sandboxing

Test automation tooling

Job description

Warsaw, Madrid | Working from home up to 40% | Referencia 8247

Agentic AI is changing how software gets built — and at SIX, it will touch the work of more than thousand engineers. We're building a new team at the center of this shift, responsible for shaping how AI-driven software engineering works across the company. As part of this team, you will build the guardrails that make agentic development trustworthy at scale: the test automation, coverage enforcement, and independent review layers that let AI agents write and ship code without compromising quality.

What You Will Do

• Build AI SDLC tooling as a platform capability, not a project. Its pillars are evaluation of agents, skills and prompts; AI code review in CI; and test automation: agent-driven test generation and maintenance, coverage enforcement on changed lines, flaky-test detection and self-healing, mutation testing, and test-suite health (redundancy, gaps, execution time) across unit, integration, and end-to-end layers.
• Build and operate the AI agent harness. The sandboxed execution environment, tool/permission scoping, and CI/CD integration that lets agents propose, test, and merge code, instrumented with decision logs and action provenance so every agentic change is traceable and reproducible.
• Own the independent review layer for AI-generated code and tests, including AI code review measured for missed defects and false positives: correctness, coverage, and quality gates in CI/CD that verify what an agent produces using tooling the agent doesn’t control, so speed never comes at the cost of test quality or code health.
• Define and evolve the quality and tooling strategy for an AI-driven SDLC: what gets tested where, how test data is generated and managed, how test quality is measured (not just pass/fail, but whether the tests catch regressions), and how the SDLC standards defined by the Enterprise SDLC track are enforced in tooling.
• Treat AI SDLC tooling and guardrails as a product, not a gate. Instrument for adoption, false-positive rate, and developer trust, keeping the safe, well-tested path the fastest path.

What You Bring

• Hands-on familiarity with agentic AI architectures: agent orchestration, tool-use/sandboxing, and harness design, not just conceptual awareness of “AI in the SDLC.”
• 6+ years in software engineering with deep, hands-on expertise in developer tooling or platform engineering. Test automation experience is a strong plus, not a prerequisite. Ideally someone with a track record of building tooling or developer infrastructure that other engineering teams adopted, not just writing test suites.
• Experience evaluating LLM or agent systems (eval sets, error analysis, LLM-as-a-judge) is a strong plus.
• Working knowledge of test methodology and code quality: test pyramids, coverage strategy, mutation testing, flaky-test remediation, and what makes a test suite trustworthy versus just green.
• Platform-product mindset. You build reusable capabilities and pave roads for other engineers, and you measure and strive for adoption and impact across SIX’s business units.
• Working knowledge of governance and controls in a regulated or high-assurance setting. Financial market infrastructure experience is a plus; experience in an adjacent regulated industry counts too.