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

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.

As a Senior Flutter Engineer you will strengthen the delivery capacity of the Mobile Experience crew within Kpler’s Application Platform tribe. The role centers on delivering high-performance, critical features for the MarineTraffic and Kpler mobile applications—serving millions of users—using Flutter and Dart. This large-scale environment requires a sharp focus on performance across the entire stack while upholding Clean Architecture standards. You will join a pioneering squad at the forefront of AI-assisted engineering, where 100% of the code deployed is authored by AI under your orchestration.

Key Responsibilities:

• Develop complex, production-ready features for the MarineTraffic and Kpler mobile apps, upholding and protecting the team’s Clean Architecture standards.
• Participate in code reviews as a quality guardian, providing constructive feedback that elevates team standards.
• Collaboratively design and evolve the mobile Backend-for-Frontend (BFF) using Node.js, TypeScript and GraphQL, ensuring the crew’s agility and reducing external dependencies.
• Adopt and continuously improve engineering practices: CI/CD pipelines, GitOps, linters, Sonar, and peer review workflows.
• Maintain and improve automated test suites (Unit, Integration, Contract) to uphold software quality.
• Mentor peers within the squad and contribute to the Front-end Chapter to harmonise practices between Web and Mobile teams.
• Support business teams in becoming autonomous over their functional scopes within the mobile apps, as part of the crew’s platformisation strategy.
• Contribute to architectural discussions and incremental improvement initiatives with pragmatism and a collaborative mindset.
• Maintain and optimize the LLM and AI integration stack (e.g., Cursor, Claude Code) to ensure the configuration and evolution of tools enabling agents to write code autonomously with a high degree of quality, adhering to all team standards (rules, commands, and architecture).

Requirements:

• Essential: Solid hands-on experience building and shipping complex Flutter & Dart applications in production environments.
• Familiarity with NodeJS/TS, and GraphQL API design.
• Deep interest in Clean Architecture principles applied to mobile development.
• Strong culture of Clean Code and a natural drive to write well-tested, maintainable software.
• Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience – no specific degree required; demonstrable expertise is prioritised.
• Professional-level English (written and spoken) is required.

• Desirable: Experience working in a platform engineering or inner-source context.
• Experience working with GQL federation.

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.