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Mobile Developer

Tech Lead Developer Experience & AI-Tooling (d/f/m)

mobile.de

Berlin

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Описание вакансии

Job description
mobile.de is Germany’s largest vehicle marketplace, with more than 1.6 million listed cars, commercial vehicles, motorcycles, and e-bikes (annual average 2025). Both private customers and registered vehicle dealers use the platform and benefit from more than 140 million visits per month*. As a “one-stop shop,” mobile.de’s offering includes not only buying and selling, but also financing and leasing solutions. Founded in 1996, the company is a subsidiary of Adevinta, a global leader in online classified portals.

Based in Berlin-Charlottenburg, we offer a dynamic environment where growth, learning, and collaboration are at the heart of everything we do. If you are driven by an eagerness to disrupt, have a passion for collaboration, and are excited about shaping the future of mobility, we would love to hear from you.

About the role
You are a
hands-on senior engineer
who can bridge
Developer Experience (DevEx)
and
AI/agentic systems
—someone who can define a pragmatic
agentic architecture
and AI strategy, then
build
the foundations, tooling, and reference implementations that make AI adoption real across engineering teams.

You’re comfortable in bringing structure and clarity, you care about developer productivity and experience, and you can turn concepts like “agents”, “guardrails”, and “LLM ops” into
production-grade
, secure, observable systems running on
AWS and GCP
.

Tech stack

Languages: Python,TypeScript/Node.js, Java/Kotlin, Go, Rust (any strong backend language welcome)
AI/LLM: LLM APIs, agent/tool frameworks, vector search
Infra: Kubernetes, Docker, Terraform, cloud services (AWS/GCP)
CI/CD: GitHub Actions, artifact caching, test automation
Observability: OpenTelemetry, Prometheus/Grafana, ELK

Job requirements
Must have skills

Strong software engineering fundamentals with production experience building backend services and/or internal platforms.
Solid experience integrating and operationalizing AI developer tools (e.g., IDE copilots, code review assistants, knowledge bots) or building similar productivity tooling.
Proven experience with implementation of agentic AI workflows.
Hands-on experience with LLM APIs and/or AI platforms (Anthropic, OpenAI, Google models), including practical prompt design and tool integration.
Experience building developer-facing products with high usability: clear APIs, solid docs, sensible defaults, thoughtful UX.
Comfort with CI/CD systems and dev workflows (GitHub Actions, pipelines, code review, testing strategies).
Solid understanding of security and privacy considerations (secrets, data classification, least privilege, audit logs).
Strong communication skills—able to translate developer pain into shipped improvements.

Nice To Have Skills

Experience with RAG pipelines (vector databases, embeddings, chunking strategies, reranking).
LLM evaluation experience (offline test suites, human-in-the-loop review, hallucination/grounding checks).
Experience building IDE plugins (VS Code/JetBrains) or chat/automation bots (Slack).
Familiarity with integration of internal developer platforms (Backstage, service catalogs).
Observability experience (OpenTelemetry, logs/metrics/traces) and SRE-minded engineering.
Experience with multi-tenant systems, enterprise auth, RBAC, and policy-as-code.

Job responsibilities

Build agentic workflows and automate our internal development processes with AI
Integrate AI capabilities into engineering workflows (e.g., code assistance, PR summarization, incident support, knowledge search, automated refactoring suggestions, etc.).
Design and ship AI-powered services (APIs, bots, IDE extensions, web apps) with strong attention to reliability and UX.
Implement LLM integrations(hosted or self-hosted) including:

prompt/tool orchestration
retrieval-augmented generation (RAG) over internal docs/code
safe tool execution (function calling, agent workflows)
evaluation/monitoring of quality, latency, and cost

Create golden paths for teams: templates, scaffolding, docs, example repos, reusable libraries, and paved roads for common tasks.
Coach teams and individuals on effective AI usage. Establish AI-first engineering approach across our organization.
Partner with Security, Legal/Privacy, and Feature teams to ensure secure, compliant AI usage (data handling, access controls, auditability).

Job benefits
Working at mobile.de comes with its perks! Enjoy the following benefits (some of many):

Rewards
: competitive base salary and participation in the company’s incentive programs.
Plan for the Future
: On top of the statutory retirement insurance, we offer a competitive company pension scheme.
Team-Building
: Regular team and company events offer the opportunity to network and learn from each other.
Learning & Development
: Keep growing with access to coaching, learning platforms and resources.
Mobility
: Stay mobile with a monthly transportation allowance.
Enjoy working
: Our well-equipped office supports focused work and teamwork – plus inviting social zones where colleagues can relax and connect.
Flexible working
: a hybrid approach with the option to work abroad for a set number of days per year.
Wellbeing
: confidential employee assistance and support services available to employees and their immediate families.
Family support
: enhanced parental leave and family-friendly policies to support all parents and careers.

Meaningful Work
: We are a diverse, international, highly skilled and passionate team committed to a world where people share more and waste less. Every day you will have the opportunity to make a huge difference for our users, customers as well as shape the future.

Embracing AI
: We’re at the forefront of integrating cutting-edge AI technologies into our operations. Being part of mobile.de you will work with and learn about AI tools, contributing to projects that leverage AI to enhance efficiency, improve customer experiences, and drive our mission forward. With an AI-first mindset, we foster a culture of continuous learning and experimentation, empowering our team to explore and apply AI in meaningful ways for the company and themselves.

Connection and Inclusion
: Our culture is the glue that holds us together. We believe in making meaningful connections and creating an inclusive atmosphere with lots of opportunities to connect both in your day to day work and through social team activities (online and offline).

mobile.de is an equal opportunity employer and we value diversity. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status or disability status.

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Описание вакансии

Build the platform where Belgium feels at home.
For over 30 years, Immoweb has been more than just a platform; we are the digital heartbeat of the Belgian real estate market. From first apartments to forever homes, we bridge the gap between dreams and reality for millions of users every month.

Our mission: to inspire, guide and close every home move in Belgium. We make real estate fast, transparent, and stress-free through world-class technology and human-centric support. We are dedicated to connecting people with their property goals, ensuring that at Immoweb, your work has an immediate, nationwide impact from day one.

Your Mission
Who we are
Immoweb is Belgium's leading real estate portal, part of AVIV Group, Europe's largest network of digital real estate marketplaces. Every month, hundreds of thousands of people use our iOS app to search, save, and get alerted about the properties that matter to them. We're currently modernising our native codebase — moving from an older UIKit/MVVM stack to a leaner, more testable Swift 6 architecture — while keeping the app running reliably for our existing user base.

The Seeker squad
You'll join Seeker, a full-stack squad (iOS, Android, Web, Backend, Design) that owns the end-to-end property search and discovery experience: search, filters, saved searches and alerts, and the property detail page. We work in close collaboration with product and design, ship through CI/CD, and care about shipping quality features that scale to hundreds of thousands of daily users.

What You'll Do

Design and build native iOS features for the Immoweb app, working closely with our Android, Web, Backend, and Design counterparts on shared feature sets.
Contribute to our ongoing migration from UIKit/legacy patterns to SwiftUI, @Observable, and Point-Free's modular architecture libraries.
Write clean, testable code (XCTest / Swift Testing) and review your teammates' work.
Continuously improve app quality, performance, and stability for a large, active user base.
Ship through our CI/CD pipeline in close collaboration with product managers.
Be a driving force behind new features — search relevance, alerts, personalisation — and technical improvements alike.
Share knowledge with the team and help raise the bar on iOS engineering practices across Immoweb.

What You Bring

Solid, hands-on experience building production iOS apps in Swift, ideally including Swift 6 and iOS 18.
Strong SwiftUI experience; comfort with @Observable and modern state management patterns.
Good understanding of Swift Concurrency (async/await); exposure to RxSwift is a plus, as parts of our codebase are mid-migration.
Familiarity with, or willingness to adopt, Point-Free's à la carte libraries (swift-dependencies, swift-sharing, swift-navigation, swift-case-paths).
Experience consuming RESTful APIs; familiarity with Moya is a plus.
A solid grasp of software architecture and Clean Architecture principles.
Basic knowledge of unit and UI testing (XCTest / Swift Testing).
Comfort working with Git and collaborative workflows (GitHub).
Excellent communication skills; you're a team player who shares knowledge openly.
English is mandatory; French or Dutch are strong assets given our Belgian market.

Nice to have

Experience with Swift Package Manager.
Familiarity with the Composable Architecture (TCA) or similar unidirectional architectures.
Experience with A/B testing and product analytics/tracking.
Experience with Bitrise or similar CI/CD tooling.
Knowledge of accessibility best practices.
Experience contributing to or consuming a design system.
Familiarity with Jira and Confluence; experience working in Scrum.

What We Offer

A friendly, quality-first engineering culture where you'll help modernise a widely-used app.
Real ownership over features used by hundreds of thousands of people every day.
Hybrid working, with the option to be based in Brussels or Bucharest.
Opportunities for growth — training, conferences, and mentorship within a full-stack squad.
The autonomy to work in the way that makes you most productive, and a say in the tools you use.