Principal Engineer, Growth Mega Alliance (all genders)

<h2><strong>The Role</strong></h2> <p>The Growth Mega Alliance (GMA) builds the platforms that power how HelloFresh acquires, converts, and retains customers across 18 markets and multiple brands, across five pillars: AdTech, Conversions, Payments, Communications, and Customer Value Optimization (CVO).</p> <p>As Principal Engineer, you are the technical visionary for these platforms. You define architectural direction across all five pillars, lead the most consequential cross-cutting initiatives, and raise the technical bar for the entire organization. This is a hands-on leadership role - you code, review, and design alongside the senior and staff engineers who look to you as the technical lead.</p> <h2><strong>What You'll Do</strong></h2> <h3><strong>GenAI &amp; Agentic Engineering Leadership</strong></h3> <ul> <li>Own GMA's GenAI strategy: identify the highest-leverage opportunities across all five pillars where AI/ML unlocks step-change outcomes, for both engineering productivity and customer-facing capabilities.</li> <li>Establish agentic development workflows — where specs drive AI-assisted code generation — and scale them from early adopters to standard practice. Build the guardrails and reference architectures that enable squads to work AI-natively.</li> <li>Develop and articulate a clear point of view on how engineering teams need to evolve in skills, process, and culture to realize the gains that agentic tools make possible.</li> </ul> <h3><strong>Growth Platform Architecture</strong></h3> <ul> <li>Own the long-term technical architecture across GMA's five pillars: real-time personalization, experimentation at scale, AI/ML-driven automation, and cross-pillar data integrity.</li> <li>Lead the most complex architectural decisions (shared identity schemas, experiment assignment, AdTech-to-Conversions signal loops, payment authorization flows) and drive migrations with large impact.</li> <li>Ensure GMA platforms integrate cleanly with internal infrastructure and meet reliability, latency, and observability requirements at a global scale.&nbsp;</li> </ul> <h3><strong>Experimentation &amp; Personalization</strong></h3> <ul> <li>Define GMA's experimentation strategy and execution framework to optimize experimentation-based decision-making at scale.</li> <li>Own the data path from customer event to business decision: instrumentation standards, identity resolution, attribution windows, and signal quality.</li> </ul> <h3><strong>Technical Strategy &amp; Cross-Alliance Collaboration</strong></h3> <ul> <li>Define GMA's multi-year technical vision and communicate it with the precision engineers need and the c