CrawlJobs Logo

Principal App Engineer

aboutyou.de Logo

About You

Location Icon

Location:
Germany, Hamburg or Berlin

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

85000.00 EUR / Year
Save Job
Save Icon
Apply Position

Job Description:

We are currently looking for a skilled Principal App Engineer (m/f/d) with a passion to assume leadership responsibilities to support us in building the fastest & most intuitive shopping app using a brand-new tech stack onsite in Hamburg or Berlin! As a Principal position, this role requires a high degree of autonomous working and reports directly to the Director of Engineering. You will be the primary technical lead responsible for all app teams, driving technical discussions and ensuring our solutions are robust and forward-thinking. The App & Web Team constantly improves the App, Mobile Website and Desktop Website. These big-scale products are each visited by over 11M active users every month. The team’s focus is to provide our customers the most inspiring, convenient, intuitive, and easy-to-use shopping experience. They constantly challenge themselves to raise the bar of what is “state of the art” in customer-facing products.

Job Responsibility:

  • Build and maintain a high-quality mobile application using Flutter for iOS and Android platforms
  • Participate as a solution architect from the very beginning of new projects
  • Gain significant exposure to other teams to align solutions and drive the tech stack of all teams forward
  • Drive technical discussions forward with the team and lead architectural alignment
  • Lead by example and set coding standards, review pull requests and mentor other engineers in the team
  • Empower the team to deliver mission-critical features in quality & time
  • Contribute to architectural decisions across multiple stacks
  • Closely collaborate with Product Managers, Designers, Testers and other stacks (Backend and Web)
  • Introduce new technologies, tools or processes that improve developer productivity and product quality
  • Debug performance and reliability issues across the stacks

Requirements:

  • 8+ years of programming experience
  • At least 3 years of native or hybrid App development experience
  • Expert-level Dart & Flutter knowledge
  • CI/CD experience – Google Play Store, App Store deployments (fastlane, GitHub Actions or similar)
  • Experience with Unit and Golden Tests
  • Experience of performance optimisation and profiling (using Flutter DevTools)
  • Mobile native experience – iOS or Android
  • Experience with monitoring tools – Firebase Crashlytics, Sentry, DataDog etc.
  • Figma knowledge
  • Experience using AI (e.g. Copilot or Cursor) to speed up coding experience
  • Experience with Backend development
  • Mobile automated testing
  • Excellent problem-solving
  • High autonomy and ownership
  • Strong communicator
  • Team player

Nice to have:

  • Experience in Web Development
  • DevOps experience (e.g. CI/CD pipelines, AWS)
  • gRPC experience
  • Firebase experience
  • Open-source experience
What we offer:
  • Hybrid working
  • Fresh fruit every day
  • Sports courses
  • Free access to code.talks
  • Exclusive employee discounts
  • Free drinks
  • Language courses
  • Laracast account for free
  • Company parties
  • Help in the relocation process
  • Mobility subsidy
  • State-of-the-art technology
  • Central Location
  • Company pension
  • Dog-friendly office
  • AY Academy
  • Feedback Culture
  • Job Bikes

Additional Information:

Job Posted:
December 14, 2025

Employment Type:
Fulltime
Work Type:
Hybrid work
Icon
View All Jobs In This Company
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Principal App Engineer

Software Engineer, Principal - Mobile App

As a principal mobile app engineer, you will be involved in all phases of the de...
Location
Location
Salary
Salary:
Not provided
blackbaud.com Logo
Blackbaud
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8+ years as a Software Engineer
  • 5+ years of React Native mobile app experience with extensive knowledge of the mobile app development lifecycle, from setting up local environments to publishing
  • Proficiency in working with RESTful services and APIs
  • Proficiency in architectural patterns in React Native mobile apps
  • Proficiency in designing effective state management strategies in React Native mobile apps
  • Proficiency testing React Native mobile apps using various methodologies
  • Experience setting up CICD pipelines for a mobile app
  • Proficiency in debugging a published mobile app
  • Good communication skills working with internal and external stakeholders, including presentation to the internal team and wider audiences
  • Mentoring and developing junior team members, representing the team and collaboration with members of other teams
Job Responsibility
Job Responsibility
  • Contribute to the design and develop software applications, project prototypes, proof of concepts & client demos
  • Evaluate performance of critical application components and optimize them to assure maximum performance and scalability
  • Assist in driving the development effort for End-to-End on-time delivery of high-quality solutions that conform to feature requirements
  • Work closely with architecture in the gathering of requirements and the dissemination of information to the team
  • Perform, design and code reviews for all key application functional components
  • Provide critical thinking, technical innovation and attention to detail when serving as a trusted advisor on your team
  • Keep up to date on the latest technical developments in your area
  • Ensure compliance with security, web standards and accessibility requirements
  • Ensure robust high quality code standards are maintained in the development process
What we offer
What we offer
  • Flexible remote or hybrid work culture
  • Investment in your well-being
  • Time off to volunteer
  • Benefits that support each stage of your life journey
  • Inclusive work environment
Read More
Arrow Right
New

Principal Software Engineer

About LogRocket: Founded in 2016, LogRocket's goal is to make every experience o...
Location
Location
United States , Boston or NYC
Salary
Salary:
225000.00 - 260000.00 USD / Year
logrocket.com Logo
LogRocket
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of experience in a full stack or backend development role, preferably with a SaaS company
  • Experience with state of the art cloud technologies, including architectural principles, specific tools of the trade, and their strengths and weaknesses
  • Hands-on experience building and redesigning highly available distributed systems
  • Familiarity with modern Javascript-based applications and frameworks
  • Experience in development environments with demanding scalability or availability requirements
  • A strong collaborator who is transparent about progress on tasks, seeks feedback early and often, works effectively with the team to deliver on engineering estimates
  • Acts as a mentor to junior engineers and provides coaching to upskill other team members
Job Responsibility
Job Responsibility
  • Design a system to automatically detect the most common user paths across millions of events
  • Implement a search backend that allows users to search in real time across billions of log entries
  • Build a machine learning pipeline that automatically detects bugs in our users' apps
  • Automate database scaling to improve operating cost while maintaining the ability to respond to traffic spikes
  • Build a system that automatically recommends integrations for customers based on their toolset
What we offer
What we offer
  • Catered lunch and an impressive array of your favorite snacks (healthy AND non-healthy!)
  • Unlimited vacation policy
  • Health, Dental, Vision benefits, 401k, commuter benefits
  • Generous stock options
  • Regular team outings and activities (from boat rides to paintball, we’ll try anything!)
  • Fulltime
Read More
Arrow Right

Principal Engineer, Software - Android

At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees ...
Location
Location
United States , Bellevue; Denver; Overland Park; Frisco
Salary
Salary:
133500.00 - 240700.00 USD / Year
https://www.t-mobile.com Logo
T-Mobile
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years technical engineering experience
  • Experience in mobile software development using Kotlin, Jetpack Compose or Android SDK
  • Developing sophisticated Android mobile applications
  • Experience building a scalable customer facing application used by millions of customers
  • Provide on-call and in-person support for troubleshooting, isolation, maintenance, operations, patching, incident management, problem management, build and deployments for owned software and systems
  • Hands on experience in developing mobile networking, REST web-services, understanding large and complex code bases that involves mobile, backend and external SDK integration
  • Designing mobile application using VIPER, Factory, DAO, MVVM, MVC, Delegate, Builder, Adapter, Singleton and Facade design patterns and architecture
  • Experience in API design, SDK architecture, and mobile software lifecycle development practices
  • BS degree in Computer Science, Information Technology, or equivalent experience
  • Communication
Job Responsibility
Job Responsibility
  • Drives projects with the Product, UX/UI and Backend teams to design, build and extend consumer facing new products, platforms, and features
  • Improve product quality through code reviews, writing effective unit tests
  • Ability to digest feature requirements and high-level end to end design to guide in coding approach and work breakdown
  • Ability to produce a low-level design document to detail feature implementation
  • Presents project improvement scenarios to management for consideration
  • Lead development team in building native functionality with optimization and expansion to support T-Mobile’s Digital First mission
  • Present highly technical concepts to both technical and non-technical decision-makers
  • Continuously learns, builds content, and guides others specific subject areas
  • Informally coaches and gives to the development of others through mentoring or in house workshops and learning sessions
  • Develops engineers across functional teams on technology decisions
What we offer
What we offer
  • Competitive base salary and compensation package
  • Annual stock grant
  • Employee stock purchase plan
  • 401(k)
  • Access to free, year-round money coaches
  • Medical, dental and vision insurance
  • Flexible spending account
  • Paid time off
  • Up to 12 paid holidays
  • Paid parental and family leave
  • Fulltime
Read More
Arrow Right
New

MS Dynamics CRM Developer/Lead

As a Senior D365 Engineer, you will work in one of the largest and most complex ...
Location
Location
United States , Austin
Salary
Salary:
55.00 USD / Hour
realign-llc.com Logo
Realign
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of hands-on experience in software development, specifically with Microsoft Dynamics 365
  • Experience in user management, role assignment, and security configuration within Dynamics 365 and Power Platform
  • Ability to configure and customize Dynamics 365 applications to meet business requirements, including creating custom entities, workflows, power automate flows and business rules
  • Familiarity with Azure Active Directory and integration with other Microsoft services
  • Proficient in C#, .NET, JavaScript, and SQL with experience in web services (REST/SOAP)
  • Solid understanding of Dynamics 365 customization, configuration, and deployment using managed solutions
  • Experience with the Power Platform, including Power Apps (both model-driven and canvas apps), Power Automate, and PCF controls etc.
  • Knowledge of Azure and cloud-based services is advantageous, specifically Azure Functions
  • Experience with SQL Server Integration Services (SSIS)
  • Experience with HTTP and REST architecture.
Job Responsibility
Job Responsibility
  • Develop and customize Microsoft Dynamics 365 applications to fulfill specific business needs
  • Hands-on experience with CRM, sales and marketing modules
  • Develop software and design solutions independently to satisfy customer requirements that consider performance and availability
  • Partner with engineering product managers and principal software engineers to translate requirements into detailed designs
  • Tune performance and resolve availability issues of product or service and its dependencies in production.
  • Estimate software development effort including identifying dependent teams and developing code to satisfy complex requirements
  • Adopt engineering best practices while contributing to the definition of the engineering lifecycle as well as the definition of best practices
Read More
Arrow Right

Principal Visual Designer, Emerging UI

The Emerging UI team at Cash App takes a horizontal view of the Cash App experie...
Location
Location
United States , Bay Area
Salary
Salary:
251600.00 - 377400.00 USD / Year
block.xyz Logo
Block
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Experience building and evolving apps
  • A passion for turning complex problems into simple and engaging UI
  • Outstanding systems thinking, visual design, and product thinking for mobile apps
  • Experience applying research, usability tests, and metrics to inform design decisions
  • Comfort with an iterative design process that includes accepting and acting on feedback
  • Strong analytical, technical, and strategic experience
  • Experience defining motion libraries for UI
  • Experience building data visualization libraries consumed by product teams
  • Experience collaborating across disciplines to lead or support a new idea or product to launch
  • Experience conducting and guiding user research and cross-functional collaboration
Job Responsibility
Job Responsibility
  • Drive visual design evolution: Lead the aesthetic and experience of the product alongside leads and our Design Systems team, ensuring the Cash App brand comes to life in our app
  • Lead with AI first design and development mindset
  • Shape core aspects of the Cash UI: Establish and evolve UI such as building data visualization, motion application
  • Elevate brand expression: Integrate our brand into the product through innovative and opinionated visual design and visual asset libraries, ensuring unique brand moments at the right touchpoints for our users
  • Build systematically: Help build our design system, creating comprehensive frameworks, documentation, and libraries that other designers can follow to bring their work to life visually
  • End-to-end accountability: Obsess over the process from early concept through implementation, ensuring a well-crafted and beautiful outcome
  • Coach the creative direction: Be a trusted advisor on all things Cash App's visual language with partners and system consumers
  • Help shape the future of finance and how customers are empowered to manage their money
  • Contribute to defining our product experience and emerging interfaces across several foundational surfaces
  • Lead work driving fundamental concepts across mobile and web clients
What we offer
What we offer
  • Remote work
  • medical insurance
  • flexible time off
  • retirement savings plans
  • modern family planning
  • Fulltime
Read More
Arrow Right
New

Fabric Administrator

The Microsoft Fabric Administrator is responsible for managing, configuring, and...
Location
Location
United States , El Paso; Las Cruces
Salary
Salary:
70720.00 - 99840.00 USD / Year
jhrose.com Logo
JH Rose Logistics
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field (preferred)
  • At minimum 3 – 5 (three to five) years of experience administering Power BI and Microsoft Azure environments
  • Proven Experience in Fabric Administration to include hands-on experience troubleshooting in: Dataset refresh failures
  • Gateway & connectivity issues
  • Capacity and performance bottlenecks
  • Model optimization (DAX efficiency, table relationships, memory usage)
  • Strong understanding of Power BI/Fabric architecture: capacities, semantic models, refresh pipelines, Lakehouse, Warehouse, notebooks and OneLake
  • Experience with Azure Active Directory (Entra ID), service principals and role-based access control
  • Proficiency with monitoring tools (Log Analytics, Admin Portal, Capacity Metrics App)
  • Familiarity with REST APIs, Fabric CLI, Power Shell, or automation frameworks
Job Responsibility
Job Responsibility
  • Manage and configure Fabric capacities, workspace assignments, workspace settings, and capacity scaling
  • Oversee OneLake storage organization, shortcuts, security, and data access governance
  • Maintain and enforce workspace standards, naming conventions, and lifecycle management
  • Manage Power BI Applications configuring audiences, enforcing Row-Level Security and visibility
  • Administer user permissions, roles, service principals, and managed identities across all Fabric Artifacts
  • Diagnose and resolve Power BI architecture issues related to: Dataset/semantic model refresh failures
  • Gateway and connectivity issues
  • Capacity overload and throttling
  • Long-running DAX queries, slow visuals, inefficient data models
  • Incremental refresh configuration and performance tuning
What we offer
What we offer
  • 401(k)
  • Dental Insurance
  • Health Insurance
  • Life Insurance
  • Paid Time Off
  • Tuition Reimbursement
  • Vision insurance
  • Health Savings Account
  • Fulltime
Read More
Arrow Right
New

Fabric Administrator

The Microsoft Fabric Administrator is responsible for managing, configuring, and...
Location
Location
United States , El Paso; Las Cruces
Salary
Salary:
70720.00 - 99840.00 USD / Year
jhrose.com Logo
JH Rose Logistics
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field (preferred)
  • At minimum 3 – 5 (three to five) years of experience administering Power BI and Microsoft Azure environments
  • Proven Experience in Fabric Administration to include hands-on experience troubleshooting in: Dataset refresh failures
  • Gateway & connectivity issues
  • Capacity and performance bottlenecks
  • Model optimization (DAX efficiency, table relationships, memory usage)
  • Strong understanding of Power BI/Fabric architecture: capacities, semantic models, refresh pipelines, Lakehouse, Warehouse, notebooks and OneLake
  • Experience with Azure Active Directory (Entra ID), service principals and role-based access control
  • Proficiency with monitoring tools (Log Analytics, Admin Portal, Capacity Metrics App)
  • Familiarity with REST APIs, Fabric CLI, Power Shell, or automation frameworks
Job Responsibility
Job Responsibility
  • Manage and configure Fabric capacities, workspace assignments, workspace settings, and capacity scaling
  • Oversee OneLake storage organization, shortcuts, security, and data access governance
  • Maintain and enforce workspace standards, naming conventions, and lifecycle management
  • Manage Power BI Applications configuring audiences, enforcing Row-Level Security and visibility
  • Administer user permissions, roles, service principals, and managed identities across all Fabric Artifacts
  • Diagnose and resolve Power BI architecture issues related to: Dataset/semantic model refresh failures, Gateway and connectivity issues, Capacity overload and throttling, Long-running DAX queries, slow visuals, inefficient data models, Incremental refresh configuration and performance tuning, Row-level security (RLS) and object-level security (OLS) conflicts
  • Utilize Fabric Artifact's lineage to identify downstream issues with security, disparate refresh of associated artifacts and/or errors
  • Analyze performance metrics and logs from the Admin Portal, Fabric Capacity Metrics, and Log Analytics
  • Collaborate with BI developers to optimize data models, reduce memory pressure, and enforce best practices
  • Implement governance policies including all artifact metadata associated with descriptions and sensitivity labels, data policies, RLS/OLS, and workspace access controls
What we offer
What we offer
  • 401(k)
  • Dental Insurance
  • Health Insurance
  • Life Insurance
  • Paid Time Off
  • Tuition Reimbursement
  • Vision insurance
  • Health Savings Account
  • Fulltime
Read More
Arrow Right

Principal Product Designer, Moneybot

We’re looking for a Principal Product Designer to help craft the customer experi...
Location
Location
United States , Bay Area
Salary
Salary:
176700.00 - 311900.00 USD / Year
block.xyz Logo
Block
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 10–15 years of experience designing digital products, including deep IC impact on end-to-end product vision
  • A portfolio showcasing high-craft consumer products, product, and interaction design — ideally across complex, data-rich or AI-driven products
  • Experience designing for conversational, assistive, or intelligent interfaces is a plus
  • A history of influencing senior leadership and shaping multi-quarter product direction through design
  • Proven ability to partner closely with engineering and product teams to bring ambitious ideas to life
  • A prototyping mindset — whether through design tools, code, or lightweight experiments — using demos to think, test, and communicate ideas
  • Strong written and verbal storytelling skills — you design not just what people see, but how they understand it
Job Responsibility
Job Responsibility
  • Help drive the end-to-end design of Moneybot's core experiences — from chat interactions and insights to intelligent product surfaces across Cash App
  • Translate complex systems (AI models, financial data, and customer intent) into clear, accessible, and emotionally resonant consumer experiences
  • Define the design language for proactive intelligence: how it behaves, responds, and builds trust
  • Collaborate closely with engineering, product, and research to prototype, test, and refine new interaction models
  • Raise the quality bar across every pixel and motion, crafting interactions that feel alive, useful, and unmistakably Cash App
  • Leverage AI in your toolset in a meaningful way
  • Act as a cross-functional partner and thought leader, shaping the product vision with design-led strategy and systems thinking
  • Mentor other designers, fostering a culture of craft, clarity, and experimentation
  • Contribute to the evolution of Cash App's design system as it extends into conversational and generative interfaces
  • Influence priorities and direction across design, product, and engineering through storytelling and clear design rationale
What we offer
What we offer
  • Remote work
  • medical insurance
  • flexible time off
  • retirement savings plans
  • modern family planning
  • Fulltime
Read More
Arrow Right
Welcome to CrawlJobs.com –
Your Global Job Discovery Platform
At CrawlJobs.com, we simplify finding your next career opportunity by bringing job listings directly to you from all corners of the web. Using cutting-edge AI and web-crawling technologies, we gather and curate job offers from various sources across the globe, ensuring you have access to the most up-to-date job listings in one place.
Jobs by Category
Art and Entertainment Jobs Banking Jobs Call Center Jobs Construction Jobs Consulting Jobs Customer Service Jobs Education Jobs Energy Jobs Finance Jobs Gastronomy Jobs Health and Beauty Jobs Hospitality and Tourism Jobs Human Resources Jobs Insurance Jobs IT - Administration Jobs IT - Software Development Jobs Legal Jobs Logistics Jobs Manufacturing Jobs Marketing, Digital Marketing, SEO, SEM Jobs Media Jobs Nursing Jobs Office Administration Jobs Pharmacy Jobs Physical Work Jobs Public Relations Jobs Public Sector Jobs Purchasing Jobs Quality Control Jobs Real Estate Jobs Research and Development Jobs Sales Jobs
Job Positions Jobs by Country
United States Jobs United Kingdom Jobs India Jobs Australia Jobs Canada Jobs Poland Jobs Ireland Jobs Spain Jobs
Company
Blog About Us Contact
Follow Us
Facebook
X (Twitter)
LinkedIn
Instagram
© 2025 CrawlJobs Ltd. All Rights Reserved
Terms & Conditions Privacy Policy