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Senior Fullstack Engineer (Flutter/Node.js) - Mobile Experience

Kpler
🇬🇧 United Kingdom
Hybrid
Senior
5 months ago
  • Flutter
  • Dart
  • Node.js
  • TypeScript
  • GraphQL
  • PostgreSQL
  • AI
  • CI/CD
  • Cursor
  • Claude Code
  • Performance Testing
  • Airflow
5 months ago
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At Kpler, we are dedicated to helping our clients navigate complex markets with ease. By simplifying global trade information and providing valuable insights, we empower organisations to make informed decisions in commodities, energy, and maritime sectors. Since our founding in 2014, we have focused on delivering top-tier intelligence through user-friendly platforms. Our team of over 850 experts from 69 countries works tirelessly to transform intricate data into actionable strategies, ensuring our clients stay ahead in a dynamic market landscape. Join us to leverage cutting-edge innovation for impactful results and experience unparalleled support on your journey to success. 

As a Senior Mobile Engineer in the Mobile Experience crew (Application Platform tribe), you will deliver high-performance, critical features for the MarineTraffic and Kpler mobile apps — B2C products serving millions of users — using Flutter, Dart and Mapbox. You will also help design and evolve our mobile Backend-for-Frontend (Node.js, TypeScript, GraphQL, PostgreSQL/PostGIS): a production-critical service designed to scale and sustain the full load of the mobile applications.
You will join a squad at the forefront of AI-assisted engineering, where 100% of deployed code is authored by AI under your orchestration — a modern environment for engineers who want to redefine software delivery through advanced AI tooling. The squad is close-knit and multidisciplinary: 2 Senior Engineers, 1 Mid-level Engineer, 1 EM, 1 PM, 1 Designer.  

Key Responsbilities

     
  • Develop complex, production-ready features for the MarineTraffic and Kpler apps, upholding Clean Architecture standards and translating platform conventions (Apple HIG, Material) into polished, native-feeling, accessible experiences.
  • Design and evolve the mobile BFF (Node.js, TypeScript, GraphQL, PostgreSQL/PostGIS) as a primary, scalable component serving all mobile needs.
  • Act as a quality guardian: code reviews, automated test suites (unit, integration, contract), observability, and continuously improved CI/CD and engineering practices.
  • Contribute to product and UX decisions alongside the PM and Designer — owning outcomes, not just code.
  • Maintain and optimise the AI/LLM tooling stack (e.g., Cursor, Claude Code) so agents write code autonomously to the team's standards.
  • Mentor peers, contribute to the Front-end Chapter, and support business teams' autonomy over their functional scopes as part of the crew's platformisation strategy.

Requirements

    Essential:
  • At least 5 years working experience. 
  • Strong experience building and shipping consumer (B2C) mobile applications at scale, serving over a million users.
  • Solid hands-on experience shipping complex Flutter & Dart applications in production.
  • Solid experience with Node.js/TypeScript and GraphQL API design for services operating at scale.
  • Excellent knowledge of mobile architecture, performance, testing and observability, with a strong Clean Code and Clean Architecture culture.
  • Strong understanding of Apple's Human Interface Guidelines and the ability to translate them into polished, accessible user experiences.
  • Product judgement: experience contributing to product and UX decisions with PMs and designers, rather than simply implementing specifications.
  • Professional-level English (written and spoken).
    • Desirable:
  • Experience in a platform engineering or inner-source context; GraphQL federation.
  • Geospatial experience (Mapbox, PostGIS) or exposure to Kafka, Airflow, GeoServer.
We are a dynamic company dedicated to nurturing connections and innovating solutions to tackle market challenges head-on. If you thrive on customer satisfaction and turning ideas into reality, then you’ve found your ideal destination. Are you ready to embark on this exciting journey with us? We make things happenWe act decisively and with purpose, going the extra mile. We build
togetherWe foster relationships and develop creative solutions to address market challenges. We are here to helpWe are accessible and supportive to colleagues and clients with a friendly approach.  Our People Pledge Don’t meet every single requirement? Research shows that women and people of color are less likely than others to apply if they feel like they don’t match 100% of the job requirements. Don’t let the confidence gap stand in your way, we’d love to hear from you! We understand that experience comes in many different forms and are dedicated to adding new perspectives to the team. Kpler is committed to providing a fair, inclusive and diverse work-environment. We believe that different perspectives lead to better ideas, and better ideas allow us to better understand the needs and interests of our diverse, global community. We welcome people of different backgrounds, experiences, abilities and perspectives and are an equal opportunity employer.   By applying, I confirm that I have read and accept the Staff Privacy Notice

Senior Fullstack Engineer (Flutter/Node.js) - Mobile Experience · Kpler

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