Flutter Tech Lead

About the role

This Tech Lead position at GR8 Tech focuses on the mobile frontend architecture for their B2B iGaming platforms. The role requires defining high-level mobile system architecture, ensuring stability, modularity, and performance, and translating business objectives into technical blueprints. Success means establishing engineering benchmarks for app performance and making informed decisions on system trade-offs to support millions of active players.

The role involves hands-on contribution to critical systems, leading incident response for production issues, and optimizing app performance. Key responsibilities include evaluating new mobile technologies, designing migration strategies for legacy codebases, and enforcing mobile security standards. This position requires a balance between technical quality and delivery speed, with full ownership of technical decisions and outcomes.

Collaboration is central to this role, requiring alignment with Product Managers and other Team Leads to integrate technical roadmaps with product release schedules. The Tech Lead will also standardize CI/CD pipelines and app submission processes across mobile teams. A significant aspect is people leadership, mentoring senior and mid-level engineers, guiding technical development plans, and fostering an engineering culture through knowledge sharing and architecture reviews.

Skills that matter here

• Flutter: This role requires over three years of dedicated experience with Flutter/Dart to drive mobile architecture and contribute hands-on code.
• Dart: Deep mastery of Dart internals, including isolates, async programming, and null safety, is essential for optimizing app performance and handling real-time data.
• iOS: Hands-on experience with native iOS (Swift) development is a must-have, particularly for add-to-app integrations and understanding the mobile ecosystem.
• Android: Hands-on experience with native Android (Kotlin) development is a must-have, complementing Flutter expertise for comprehensive mobile solutions.
• WebSockets: Experience with WebSockets and long-lived connections is crucial for handling high-frequency, real-time data in iGaming applications.
• protobuf: Familiarity with protobuf serialization, alongside JSON, is necessary for efficient data handling in high-scale mobile environments.

Who this role suits

• A senior mobile engineer with extensive experience in Flutter/Dart, capable of defining and owning mobile architectural strategy.
• Someone who thrives on solving complex scale problems, balancing technical quality with delivery speed in a fast-paced environment.
• A leader who enjoys mentoring engineers, fostering technical growth, and driving engineering culture through collaboration and knowledge sharing.
• An individual with a strong understanding of mobile security standards and real-time data handling, specifically within the iGaming context.

From the employer

What you’ll drive:

• Strategy & outcomes
• Own high-level mobile system architecture, defining patterns that keep our mobile apps stable, modular, and fast.
• Translate business goals into robust technical blueprints, making clear decisions on system trade-offs.
• Establish engineering benchmarks for app startup times, memory footprint, and frame rates.

• Discovery & decisions
• Evaluate new mobile technologies, frameworks, and tools to solve complex scale problems before they impact production.
• Design and execute migration strategies (including native add-to-app integrations) to modernize legacy codebases seamlessly.
• Define and enforce security baselines, including certificate pinning, obfuscation, and anti-tampering logic.

• Delivery & execution
• Contribute hands-on code to critical, high-complexity systems and core framework libraries.
• Lead incident response and root-cause analysis for high-severity mobile production issues.
• Optimize app performance, diagnosing UI/raster jank, memory leaks, and CPU-heavy operations using Dart Isolates.

• Stakeholder & cross-team alignment
• Partner with Product Managers, Heads of Streams, and Team Leads to align technical roadmaps with product release schedules.
• Standardize CI/CD pipelines, release automation (fastlane), and store submission processes across all mobile teams.
• Align architectural patterns across cross-functional streams to prevent technical fragmentation.

• People & technical leadership
• Mentor senior and mid-level engineers, running code reviews that raise the overall quality bar.
• Support Team Leads in crafting technical Personal Development Plans (PDPs) for mobile engineers.
• Drive engineering culture through technical write-ups, architecture reviews, and internal knowledge-sharing sessions.

What makes you a GR8 fit:

• Must-have
• 7+ years in commercial software development, with 3+ years dedicated to Flutter/Dart and hands-on experience in native iOS (Swift) or Android (Kotlin).
• Strong system design and architectural thinking, paired with deep mastery of Dart internals (isolates, async, null safety) and Flutter's rendering pipeline.
• Deep understanding of software engineering best practices, including state management (Bloc or Riverpod), testing (unit, widget, integration), and monorepos (Melos).
• Proven ability to balance technical quality vs delivery speed, taking full ownership and accountability for technical decisions and outcomes.
• Hands-on experience with high-frequency real-time data handling (WebSockets, long-lived connections, protobuf/JSON serialization) and mobile security standards.
• Effective technical communication skills across engineering and non-engineering stakeholders, with an ability to work smoothly in cross-functional environments (Product, Delivery, Ops).
• Mentorship and people development mindset, with experience guiding engineers through code reviews, technical roadmaps, and personal development planning.

• Nice-to-have
• Hands-on experience with native add-to-app Flutter integration strategies and incremental migrations.
• Experience building CMS-driven or Server-Driven UI frameworks.
• Familiarity with dynamic localization, per-market feature toggles, deep linking at scale, and multi-jurisdictional app deployment.
• Practical experience profiling mobile app performance (DevTools, Impeller engine, jank diagnosis, memory leak isolation).
• Familiarity with App Store / Google Play review requirements for gambling and betting applications.

Why you’ll love working here:

• Benefits
• Cafeteria — annual budget you allocate to: Sports • Medical • Mental health • Home office • Languages.

• Work-life & support
• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.

• Our culture & core values
• GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.
• FUELLED BY TRUST : we’re open, honest, and have each other’s backs.
• OWN YOUR GAME : we take initiative and own what we do.
• ACCELER8 : we move fast, focus smart, and keep it simple.
• CHALLENGE ACCEPTED : we grow through challenges and stay curious.
• BULLETPROOF : we’re resilient, ready, and always have a plan.