At a Glance
- Tasks: Drive conversion rate optimisation and build targeted marketing strategies.
- Company: Join Fyxer, a fast-growing AI email and meeting assistant startup.
- Benefits: Competitive salary, equity options, and flexible work arrangements.
- Other info: Fast-tracked career growth in a dynamic, autonomous environment.
- Why this job: Be part of a high-growth team making a real impact in the AI space.
- Qualifications: Experience in CRO or growth engineering with a strong design eye.
The predicted salary is between 130000 - 140000 £ per year.
Salary: Up to £140k/year DOE + equity
Location: Chancery Lane, London — Mon–Thu in office, Fri WFH
About Fyxer
Fyxer is an AI Email & Meeting Assistant that eliminates admin burden for professionals in client-facing roles — sales, consultants, and recruiters. We understand your inbox, draft replies in your own voice, and take crisp meeting notes. We're a pure-play applied AI company — not a SaaS product with AI bolted on. We use fine-tuned open-source models, tool use, and retrieval-augmented generation. Users send 53% of the email drafts we generate. Since launching in March 2024, we've grown from $0 to $30M+ ARR. We raised a $10M Series A and a $30M Series B in under 18 months.
The Role
We're hiring a Senior Growth Engineer with a dedicated CRO and marketing focus, sitting within our Growth Engineering team and taking meaningful ownership of the conversion journey from paid traffic through to revenue. You'll work closely with the Head of Growth Engineering to shape strategy while driving execution yourself. Your primary domain is the marketing layer — ICP-targeted landing pages, programmatic SEO, lead magnet micro-apps, and every mechanism that turns a visitor into a paying customer. You will instrument, test, and optimise every step of this funnel with engineering rigour. Growth Engineers own their area of the product end-to-end, with strong support from the team around them. No PMs — you drive your own execution.
What You'll Own
- Conversion Rate Optimisation
- Drive our CRO programme across the user journey — from landing page through to paid activation and seat expansion
- Design, build, and run multivariate experiments to improve conversion rate and sign-up quality for long-term retention
- Contribute to the experimentation infrastructure: testing frameworks, statistical rigour, result interpretation, and rollout decisions
- Marketing Engineering
- Build and optimise ICP-targeted landing pages that speak directly to the pains of sales professionals, consultants, and recruiters
- Own programmatic SEO infrastructure and lead magnet micro-apps as conversion channels
- Collaborate with Marketing to align product-side CRO with paid and organic acquisition funnels
- Data & Insight
- Work with quantitative data (product analytics, revenue data) and qualitative data (customer interviews, session recordings) to identify the highest-leverage opportunities
- Identify sign-up quality signals that predict long-term retention and feed those learnings back into acquisition targeting
- Growth Loop Strategy
- Contribute to Fyxer's broader growth loop strategy: virality mechanics, referrals, seat expansion, and upgrade flows
- Ship full-stack features end-to-end — this is a real engineering role, not tool configuration
What We're Looking For
Must-Haves
- Experience as a CRO, growth, or software engineer with a track record of improving conversion across sign-up, onboarding, or monetisation flows
- Detail-oriented with a strong eye for design and UX — comfortable with CSS/React animations and substantial front-end experiments
- Deep, intuitive understanding of consumer psychology: why certain words, layouts, and sequences drive 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 experimentation stack: feature flagging, CRM integrations, event tracking, segmentation tools
- Comfortable moving between quantitative rigour and qualitative instinct — you know when to run an interview and when to run a query
- AGI-pilled: you love AI, actively use it in your workflow, and want to automate as much as possible
- You bring intensity — genuine ownership from day one, not waiting to be told what to test next
Nice to Have
- Experience with session recording tools (Hotjar, FullStory, PostHog), funnel analytics platforms, and product event tracking pipelines
- Familiarity with LTV modelling, cohort analysis, and churn prediction
- Experience with AI-assisted development workflows (Cursor, Claude Code, or similar)
- Prior experience at a fast-growing B2B SaaS or AI startup
Why Fyxer?
We are intentional about our team. We believe a small, exceptional team working with extreme focus will always outperform a large, bloated organization.
- Autonomy: We hire people who want ownership and then we actually give it to them.
- Velocity: You will be fast-tracked into senior responsibilities far earlier than at a traditional company.
- Scale: We are on track to hit $100M in revenue by the end of 2026. This is a rare opportunity to join a high-growth rocket ship at the foundational stage.
Senior Growth Engineer employer: FYXER
Fyxer is an exceptional employer that champions autonomy and rapid career progression, making it an ideal place for a Senior Growth Engineer to thrive. With a dynamic work culture that prioritises ownership and innovation, employees are empowered to drive their own projects and contribute meaningfully to the company's impressive growth trajectory. Located in the vibrant Chancery Lane area of London, Fyxer offers a unique opportunity to be part of a cutting-edge AI company poised for significant expansion, with competitive compensation and equity options that reflect its commitment to employee success.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Growth Engineer
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at events. A friendly chat can lead to opportunities that aren’t even advertised yet.
✨Tip Number 2
Show off your skills! Create a portfolio or a personal project that highlights your growth engineering expertise. It’s a great way to demonstrate what you can bring to the table.
✨Tip Number 3
Prepare for interviews by practising common questions and scenarios related to CRO and marketing. We want to see how you think, so be ready to share your thought process!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take that extra step.
We think you need these skills to ace Senior Growth Engineer
Some tips for your application 🫡
Show Your Passion for Growth:When you're writing your application, let your enthusiasm for growth engineering shine through! Share specific examples of how you've driven conversion rates in the past and what excites you about the role at Fyxer.
Tailor Your Application:Make sure to customise your application to highlight your experience with CRO and marketing. Use keywords from the job description to show that you understand what we're looking for and how you fit into our vision.
Be Data-Driven:We love numbers! Include metrics and data points in your application to demonstrate your impact in previous roles. Whether it's improved conversion rates or successful experiments, quantifying your achievements will make your application stand out.
Keep It Clear and Concise:While we want to know all about your amazing skills, keep your application clear and to the point. Avoid jargon and focus on what makes you a great fit for the Senior Growth Engineer role. And remember, apply through our website for the best chance!
How to prepare for a job interview at FYXER
✨Know Your Stuff
Before the interview, dive deep into Fyxer's product and its unique selling points. Understand how their AI Email & Meeting Assistant works and think about how your skills in CRO and marketing can enhance their growth strategy.
✨Showcase Your Experience
Prepare specific examples from your past roles where you've successfully improved conversion rates or optimised user journeys. Be ready to discuss the tools and methodologies you used, especially if they align with Fyxer's tech stack like TypeScript and React.
✨Think Like a User
Demonstrate your understanding of consumer psychology by discussing how design and UX impact conversion. Bring ideas on how to create ICP-targeted landing pages that resonate with sales professionals, consultants, and recruiters.
✨Be Ready to Experiment
Fyxer values data-driven decision-making, so come prepared to talk about your experience with multivariate testing and how you've used data to inform your strategies. Share insights on how you interpret results and make rollout decisions based on statistical significance.
