Lead CRO Engineer, Fyxer

• You’re an exceptional engineer who thinks in growth loops and conversion mechanics, not just funnels
• Previous experience as a CRO, growth, or software engineer with a track record of measurably improving conversion across sign-up, onboarding, or monetisation flows
• Is details oriented with an eye for design and UX. Has worked with CSS/React animations before and is comfortable with larger experiments and projects
• A deep, intuitive understanding of consumer psychology and why certain words or layouts get customers to take action
• Comfortable designing and interpreting multivariate tests and correlative analyses; you know the difference between statistical significance and practical significance
• Proficient in our stack (or close to it): TypeScript, React, Next.js, TailwindCSS, ShadCN, React Query, serverless functions
• Knowledge of the B2B SaaS growth and experimentation stack: feature flagging, CRM integrations, event tracking, segmentation tools
• AGI-pilled, you love AI and want to try and automate as much as possible within your role and across the organization
• You bring intensity. We’re a small team and expect genuine ownership — this isn’t a place where you wait to be told what to test next
• Comfortable moving between quantitative rigour and qualitative instinct — you know when to run an interview and when to run a query

Desirable

• Reporting to: Head of Growth Engineering
• We’re hiring a Lead CRO Engineer to sit within our Growth Engineering team — a small, high-ownership group responsible for the product-led growth loops that drive Fyxer’s explosive revenue trajectory
• This isn’t a UI polish role. You'll own the infrastructure and strategy that drive growth from session to conversion. This means designing and running A/B tests, analyzing user behavior data, and optimizing every step of the acquisition journey across our paid landing pages programmatic SEO, and lead magnet micro-apps
• You’ll work at the intersection of data, marketing, product, and engineering — using rigorous A/B testing, behavioural analytics, and a deep understanding of B2B SaaS growth mechanics to move the metrics that matter
• Each Growth Engineer owns an area of the product end-to-end. No PMs. You own the strategy and the execution
• Lead our conversion rate optimisation programme across the full user journey — from landing page to paid activation and seat expansion
• Design, build, and run multivariate experiments to systematically improve conversion rate and identify through data ways to improve our sign up quality for long term retention
• Own the experimentation infrastructure: testing frameworks, statistical rigour, result interpretation, and rollout decisions
• Work with quantitative data (product analytics, revenue data) and qualitative data (customer interviews, session recordings) to identify the highest-leverage opportunities
• Build features and flows — this is a full-stack engineering role, not just configuration of tools. You’ll ship code
• Contribute to Fyxer’s growth loop strategy: virality, referrals, seat expansion, and upgrade mechanics
• Collaborate with Marketing to align product-side CRO with paid and organic acquisition funnels
• We’re very intentional about adding new people. We think a small team of exceptional people working hard at a problem they care about will always beat a larger, less focused team
• That means you’ll need to bring an intensity to this role that might not be expected at other companies. But it also means you’ll be fast-tracked into more senior roles and responsibilities far earlier