Lead design, build, and maintain scalable Android mobile apps and related backend microservices. Mentor engineers, drive technical decisions, improve mobile-first APIs, champion quality, debugging, automation, and performance, and collaborate across teams to deliver production-ready, secure e-commerce/QSR solutions.
Position Overview: An exciting opportunity for a forward-thinking full stack engineer who thrives on producing customer facing digital experiences. You will join a leading name in the food and beverage market with 500+ stores across the world. As a Mobile Principal Engineer, you will be responsible for driving technical excellence and innovation within your mobile apps team. Experience in backend APIs is an added advantage. You will lead by example, playing a hands-on role in designing, building, and maintaining mobile applications and back-end microservices. Additionally, you will impart your knowledge and coach others fostering a culture of continuous learning and collaboration
Responsibilities:
- Architect and develop scalable and performant mission critical mobile Android Apps.
- Engage and contribute actively into the various external interfaces and APIs to improve mobile first capabilities
- Mentor a team of engineers, providing guidance on best practices, design patterns, and coding standards.
- Drive a culture of quality and innovation, advocating Extreme Programming ways of working
- Collaborating with cross-functional teams, participating in Agile processes and code reviews
- Utilise strong debugging skills to troubleshoot and resolve complex issues in both front-end and back-end systems (including both internal and third-party systems)
- Experience working on cloud platforms, with knowledge of Google Cloud Platform (GCP) being an advantage
- Familiarity with e-commerce platforms and solutions is highly desirable
- Stay abreast of emerging technologies and industry trends, evaluating their potential impact and advocating for them to be included on the product roadmap and development processes
- Champion continuous improvement, performance optimisation, and security throughout the development lifecycle
Skills:
- Proven experience as a hands-on engineer with proficiency in Kotlin
- Hands on experience in backend API development using Node.js will be an advantage
- Experience in technical decision making guiding the team to propose solutions which implement standard mythologies so that a maintainable product is produced
- Strong leadership skills with the ability to inspire and mentor other engineers
- Experience working in the Quick Service Restaurant (QSR), Retail, or E-commerce industries is a plus
- Excellent problem solving and communication skills
- You have a passion for automation tested code and setting high standards for code quality
- Be a keen team player with strong interpersonal skills
- Ability to thrive in a fast-paced, dynamic environment and drive change through innovation and collaboration
- Location: 5 days per week in our London office
Photon London, England Office
London, United Kingdom
Similar Jobs
Artificial Intelligence • Fintech • Payments • Business Intelligence • Financial Services • Generative AI
Lead the Payments Product team to build and scale core clearing, settlement, ledger, and banking integrations. Drive routing, failover, reconciliation, liquidity management, and developer APIs to optimize authorization, settlement speed, cost, and reliability across global payment rails.
Top Skills:
AchAPIsBanking IntegrationsCard Networks (VisaDouble-Entry LedgerFaster PaymentsLedger And Reconciliation SystemsMastercard)SepaSwift
Financial Services
Originate, structure, underwrite and service UK (and French) regulated and unregulated residential mortgages for ultra-high-net-worth clients. Advise Client Advisors on suitability and affordability, coordinate with Credit Risk and Mortgage Support, manage ongoing portfolio maintenance, and educate stakeholders on market practices and requirements.
Financial Services
Support structuring and portfolio management of project finance loans across energy, infrastructure, and transport. Perform due diligence, build financial models, assess credit risk, prepare credit memos, negotiate documentation, and monitor portfolio performance and covenants while collaborating with business partners.
Top Skills:
ExcelPowerPointWord
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.


