Founding Engineer (Flutter)

GR8_TECH; United States; Remote; USD 140,000 - 220,000; Full time

Benefits offered by this job

Maternity leave

Childcare allowance

Vacation days

Sick leave

Team events

Learning programs

Job summary

GR8_TECH is seeking an experienced Frontend Mobile Architect to own the Flutter/Dart mobile platform across flagship products. You will scale real-time experiences to millions of users, delivering high-throughput, low-latency Flutter apps while elevating engineering standards across teams.

Ideal candidates have 7+ years in commercial software with 3+ years in Flutter/Dart and hands-on iOS/Android. You will mentor engineers, lead architectural decisions, and champion security and performance

Qualifications

• 7+ years in commercial software development with 3+ years in Flutter/Dart and hands-on iOS/Android experience.
• Proven Founding Engineer track record designing large-scale, high-load Enterprise apps.
• Leadership history driving mobile products through full development lifecycle to production.
• Strong system design and Dart internals knowledge (isolates, async, null safety).
• Experience with state management (Bloc/Riverpod), testing, and monorepos (Melos).
• Ability to balance quality with delivery speed and own technical decisions.
• Hands-on experience with real-time data (WebSockets) and mobile security standards.

Responsibilities

• Own high-level mobile system architecture and define patterns for stability, modularity, and performance.
• Translate business goals into robust technical blueprints and trade-off decisions.
• Lead incident response and optimize app performance, memory, and frame rates.
• Collaborate with Product, Delivery, and Ops to align roadmaps and releases.
• Mentor engineers through code reviews and PDPs to raise quality.

Skills

Flutter/Dart

Architectural leadership

Mobile systems design

Code reviews

UI performance

WebSockets

Cross-functional collab

Dart isolates

Job description

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:

• 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).
• Proven track record as a Founding Engineer, with hands‑on experience designing and architecting large‑scale, high‑load Enterprise applications from scratch
  (beyond small‑scale or multi‑page apps) .
• Strong history of technical leadership, successfully driving complex mobile products through the full development lifecycle to production deployment .
  
• 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.
• A verifiable portfolio of complex, production‑grade applications, where you served as the Primary Architect or Tech Lead .

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:

Work‑life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• 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.