Plum is looking for a Staff Engineer to join our First & Last Mile group. In this technical leadership role, you will be responsible for driving the core user lifecycle including Onboarding, Offboarding, Authentication, Engagement, and Subscriptions. You'll bridge complex backend services, mobile client architecture, and business impact, defining technical roadmaps and architecting systems for rapid experimentation.

What You'll Do

Architect and design modular, scalable, and observable systems that support high-volume experimentation and user engagement flows from mobile client to backend services.
Drive the Cross-Platform Strategic Vision and roadmap, ensuring architecture supports high-volume experimentation, rapid iteration, and future business needs.
Promote Continuous Improvement by driving architectural standards, engineering best practices, and operational excellence across multiple teams.
Provide guidance and mentor Senior Engineers and other team members, fostering a culture of technical excellence and career growth.
Identify root causes of systemic issues and architectural bottlenecks, determining short-term mitigations and long-term strategic resolutions.
Work on the whole life cycle of the software, from high-level system design to deployment and post-release monitoring.
Partner closely with Product Managers and Data Scientists to design technical solutions that unlock new growth opportunities and optimise user funnels.

What We're Looking For

Proven track record of technical leadership, preferably in a mobile-heavy or full-stack capacity.
Experience designing and architecting systems at scale.
Deep experience with A/B testing frameworks, experimentation platforms, or data-intensive growth loops.
High level of pragmatism; understanding when to build for scale and when to optimise for speed of learning.
Positive and solution-oriented mindset.
Strong planning and prioritisation skills, with ability to translate high-level business goals into actionable technical strategies across the stack.
Ability to share product insight with stakeholders, challenge product decisions with data, and act as a bridge between Engineering, Product, and Data Science.
Demonstrated capacity to clearly communicate complex technical, architectural, and organisational challenges to both technical and non-technical executives.
Experience working within a cross-functional team and collaborative environment; ability to facilitate technical decision-making and resolve conflicts across teams.
Self-motivated and self-managing, with excellent organisational skills and a focus on high-leverage work.
Comfortable working with both strongly and dynamically typed languages.

Team & Environment

You'll join the First & Last Mile group within Plum's team of 200+ Plumsters.

Benefits & Compensation

Own part of the company through stock options.
Private health insurance.
Annual training budget.
Plum Premium subscription.
Referral scheme with competitive rewards.
Team breakfasts and lunches.
25 days holiday + bank holidays.
45 work-from-anywhere days annually.
2 weeks sabbatical after 4 years.
Enhanced parental leave.
1 paid volunteering day annually.
Annual team trip to a surprise destination.

Work Mode

This is a hybrid role with a flexible approach to remote working: you are encouraged to work at least 2 days a week in our London, Athens, or Cyprus offices.

Plum is an Equal Opportunity Employer. Plum does not discriminate on the basis of race, religion, sex, gender identity, sexual orientation, non-disqualifying physical or mental disability, national origin or any other basis covered by appropriate law. All employment is decided on the basis of qualifications, merit and business need.