Founding Engineer (Flutter)

Anywhere·Added 6 days ago

GR8_TECH

37 open roles

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What they ask for

Have the right to work in Spain
GR8_TECH doesn't mention sponsorship in the ad.
Work in English
English is required, per the ad.
Work on-site in Anywhere
No relocation package mentioned.

The role

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.

What you'll do

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.

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.
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.
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.

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.

Requirements

What we're looking for

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.

Pay & benefits

What you'll get

Benefits Cafeteria - annual budget you allocate to:

Sports • Medical • Mental health • Home office • Languages.

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.

How they hire

2 steps2 interviews

Application
Recruitment Review
Professional Interview
Final Interview
References

About GR8_TECH

GR8 Tech is a technology company specializing in iGaming software and platform solutions. The company builds and operates its own proprietary platform, GR8, which powers online gambling and betting operations for a global client base. With a workforce of over 1,000 employees, GR8 Tech operates as a full-cycle product company, covering everything from product design and development to operations and customer support.

GR8 Tech has a significant presence in Spain, with a dedicated office in Madrid serving as a hub for its LATAM operations. The company is actively hiring for a wide range of roles in Spain, from engineering and product design to sales, marketing, and HR. For international professionals, GR8 Tech offers a dynamic, fast-paced environment within the growing iGaming sector, with opportunities to work on a proprietary platform and contribute to the expansion of the business across Latin America.

Founded: 2015
Employees: 1,000–5,000
Headquarters: Kyiv, Ukraine
In Spain: Barcelona
Website: gr8.tech

Good to know if you are moving

The company's global HQ is in Kyiv, Ukraine, but its main Spanish office is in Barcelona, which is the hub for LATAM operations.
GR8 Tech hires for many roles in Spain, including engineering, product, sales, and HR positions, making it accessible for various international profiles.
The company operates its own proprietary platform, offering the opportunity to work on a unique, in-house product rather than on third-party software.
The iGaming sector is highly international and English is commonly used as the working language, which facilitates the integration of international talent.
The company offers remote-friendly roles, although some positions may require presence in the Barcelona office.

In their own words

About the company & team

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.

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.

All open roles at GR8_TECH