[TECH] Staff Backend Engineer [CONSUMER]

HelloFresh; Warszawa; On-site; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Workspace in Warsaw

Job summary

HelloFresh's Warsaw-based HelloTech team is seeking a senior backend engineer to lead architecture for AI-powered experiences, spanning unified conversational search, personalized recommendations, and proactive in-app features. You will own LLM integration decisions, balance latency and cost, and partner with cross-functional teams to maintain coherent architecture as the product expands across surfaces.

You will mentor engineers, establish observability and testing standards for probabilistic

Qualifications

• 8+ years of backend engineering experience.
• Experience in distributed systems and event-driven architectures.
• Proficiency in Go and at least one of Java/Kotlin/Python/TypeScript.

Responsibilities

• Lead architecture for unified AI Assistant experiences across surfaces.
• Own end-to-end decisions for LLM integration in production systems.
• Act as technical bridge between Shopping AI & Search squads and product stakeholders.
• Define and drive engineering best practices for AI-powered systems.
• Provide technical leadership through reviews, design discussions, and mentoring.
• Use AI coding tools regularly to guide engineering practices.

Skills

Distributed systems

Microservices

Go

Java

Kotlin

Python

TypeScript

Node.js

AWS

Kubernetes

Kafka

RabbitMQ

SQS/SNS

LLMs integration

Observability

Mentoring

Communication

Tools

Claude

Cursor

Copilot

API/SDK integrations

Job description

Join HelloFresh in Warsaw as part of HelloTech, our global technology organisation of 1000+ people building the digital products behind our end-to-end food experience from meal kits and ready-to-eat meals to specialty offerings like pet food and premium meat & seafood. Our subscription-based, direct-to-consumer model runs on technology at every step: customer-facing apps, personalization, pricing, forecasting, supply chain, and food-waste reduction. Each of our brands serves distinct customer needs, but all are powered by the shared platforms, data, and engineering standards that HelloTech builds. HelloTech is organized into autonomous, cross-functional alliances, each owning a specific domain end-to-end. From our Warsaw office, you'll help shape scalable, data-driven products used across all our markets, working with a modern tech stack and international teams to keep improving how people discover, order, and enjoy HelloFresh’s products.

About the role: What's in the Box

What you’ll do: The Recipe

• Lead the technical architecture for unified AI Assistant experiences spanning conversational search, personalized search, and proactive in-app recommendations — so the experience holds together whether the customer is in the chatbot or elsewhere in the app.
• Own end-to-end technical decisions around integrating LLM-powered capabilities into customer-facing systems, weighing quality, latency, and cost at scale.
• Act as the technical bridge between Shopping AI & Search, neighboring squads across Shopping Journey, and product/platform stakeholders, so architecture stays coherent as the assistant expands to new surfaces.
• Define and drive engineering best practices for building and operating AI-powered systems — observability, graceful degradation, and testing strategies for components that are inherently probabilistic.
• Provide technical leadership through architecture reviews, design discussions, and hands‑on mentoring that raises the engineering bar across the tribe.
• Use AI coding tools (e.g. Claude, Cursor) as a standard part of how you build, and help shape how the wider team adopts AI‑assisted engineering practices.
• Shape the technical roadmap by spotting architectural bottlenecks early and proposing improvements before they become blockers.

What you’ll bring: The Ingredients

• 8+ years of backend engineering experience, with deep expertise in distributed systems, microservices, and event‑driven architecture (Kafka, RabbitMQ, or AWS SQS/SNS).
• Strong hands‑on proficiency in Go, or another modern backend language (Java/Kotlin, Python, or TypeScript/Node.js), with the willingness to work in Go, our squad’s primary stack.
• Practical experience integrating LLMs or other AI services into production systems via APIs/SDKs. This isn’t an ML engineering role — we’re not training foundation models — but you’re comfortable designing around how they behave: latency, cost, and non‑determinism.
• Genuine, daily hands‑on use of AI coding tools (Claude Code, Cursor, Copilot, or similar) that goes beyond casual experimentation, with a practical sense of how the context you give these tools shapes what you get back.
• Solid understanding of modern cloud infrastructure (AWS, Kubernetes) and observability practices, with the ability to set and advocate for standards across the tribe.
• A track record of turning ambiguous product problems — search relevance, recommendation quality, conversational UX — into a clear technical roadmap.
• A collaborative, low‑ego approach to problem‑solving, strong technical judgment, and a real interest in mentoring other engineers.
• Excellent communication skills and comfort working with senior stakeholders and distributed, international teams.

Prior experience with search or recommendation systems is a plus, not a requirement what matters most is your ability to design and operate reliable, scalable backend systems and reason well about new ones. Above all, we’re looking for people who will make HelloFresh better.

What we offer: The Toppings

• Global collaboration at scale: Collaborate with experienced engineers and product partners across HelloTech’s international teams, in a culture of active knowledge sharing.
• Technology with real‑world impact: Build and operate modern systems at global scale, supporting 6+ millions of customers and complex supply chain operations.
• Technical/Product/Design leadership: Drive best practices and influence architecture/design, quality, and ways of working in an autonomous, product‑led setup.
• End‑to‑end development/delivery: Drive decisions from problem definition to production, improving systems and enabling long‑term scalability.
• Access to workspace at Warsaw Centre Point. The hub offers modern facilities including showers, breakout zones, outdoor space, cycle parking, and refreshments (coffee, soft drinks, and fruit).

Are you the missing ingredient? We aim to review your profile and respond within 5 business days.