GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don't just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you're a challenger in spirit and a champion in action — join us.

Why this role exists:

This role exists to own and drive the frontend mobile architecture across our flagship products. You'll help us scale real-time user experiences to millions of active users by delivering high-throughput, low-latency Flutter applications while elevating engineering standards across our development teams.

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.

📌 Flutter Tech Lead (España)
🏢 GR8_TECH
📍 España