Full Stack Engineer - Growth & Marketing

We're looking for a full-stack engineer to join our Product Engineering team, focused on supporting the Growth and Marketing area. This role will have a 60% focus on Front End, and 40% focus on Back End.

You'll be part of the Marketplace area in Product Engineering and report to one of the Engineering Managers of the Marketplace area, with a dotted line to the Marketing SEO Manager. You'll work on Treatwell’s Marketplace products and help Treatwell be discovered, understood, and chosen across 13 markets: SEO foundations, site performance, experimentation, analytics instrumentation, and the product surfaces that connect customer intent with booking.

You'll work alongside three product engineering teams in the Marketplace area, contributing across the full breadth of what makes Treatwell's marketplace tick. As a full-stack engineer, you're the person who can move fluidly between teams accelerating growth and marketing efforts wherever the need is greatest.

You bring the mindset of someone who cares about how people find Treatwell, what experience they land on, and whether the product helps them make a confident booking. You are comfortable partnering with marketing and growth stakeholders, while staying grounded in engineering quality and product outcomes.

Responsibilities

Growth and marketing engineering - build and evolve the technical foundations that support customer acquisition, activation, and retention across Treatwell's markets; Discoverability - improve how search engines and users understand Treatwell's marketplace, without turning the role into a pure SEO implementation function; Experimentation and measurement - instrument your work, support testing frameworks, and help teams validate ideas with data before scaling them; Product surfaces - ship user-facing improvements to landing pages, discovery journeys, and conversion flows, owning the work from problem framing through production; Platform quality - own your services end-to-end, from architecture through deployment, with a DevOps mindset baked in; Cross-functional clarity - translate growth and marketing opportunities into clear engineering work, challenge scope when needed, and keep quality standards high

Requirements

Proven experience owning production-grade web applications end-to-end, and understanding that the best technical decisions come from deeply understanding the problem - not just the code (mid/senior level); Own features end-to-end - from database schema to UI, without needing a handoff; Think in systems and trade-offs, not just tickets - spot the upstream cause, not just the downstream symptom; Product mindset - think about the person using what you build, ask why before how, and push back when something doesn't make sense; Data-driven and hypothesis-led - instrument your work, measure impact, and use evidence to make decisions; Partner with non-engineering stakeholders, turning ambiguous growth or marketing needs into sensible technical options; Act as the key technical partner for marketing stakeholders, evaluating feasibility of their requests, managing expectations, and finding the right trade-off between business speed and technical quality (TBC); Able to make progress in evolving or complex domains while collaborating to create clarity - growth work often moves fast, and navigate without getting paralysed; Communicate fluently in English; Based in any city within Italy or Spain, with a valid right to work - candidates outside of these countries will not be considered

Nice to have

Experience with SEO, experimentation, analytics, performance, or growth-related product areas is a plus; Experience with AI-assisted development tools such as Claude, Cursor, or similar - and clear opinions about where they genuinely add value is a plus

Benefits

28-days holiday, plus bank holidays; Monthly £/€40 Treatwell vouchers; Mental health support through our partnership with Open-Up; 100% remote position; Market-specific benefits that will be discussed in the interview process