Product Portfolio

Luke
Harper

Senior Product Manager with 10+ years across two-sided marketplaces — B2B, B2C, and C2C. I specialise in lead management and seller-to-buyer conversion: building the merchant tools and consumer experiences that drive platform growth and commercial outcomes.

I've shipped AI products in production and am currently building in the AI space outside of work. I do my best work on 0→1 problems — turning ambiguous ideas into products that perform.

Luke Harper, Senior Product Manager

Who I am

Commercial thinker.
Builder of things
that matter.

My career has spanned both sides of the marketplace — building consumer experiences that drive demand and merchant tools that improve supply quality, conversion, and seller performance.

In 2025 I built a Lead Management System from scratch, taking it from zero to a tightly scoped MVP and continuing to iterate since launch. The LMS unified fragmented seller inboxes, introduced lead status tracking — enabling dealers to mark whether a lead resulted in a sale — and established the platform's first ever Lead-to-Sale benchmark. It onboarded 25,000+ users within six months, tracked 14,000 sales representing an estimated €154M in attributed platform transactions, and was a finalist for the company's most impactful project of the year. Most recently I shipped an AI-powered response feature within the LMS — using the Gemini API to generate personalised, context-aware replies for sellers, directly improving response rates and Lead-to-Sale performance.

Previously I held senior product roles at one of the UK's largest education marketplaces, building products used by hundreds of thousands of students across search, matching, applications, and AI-assisted discovery.

I've worked with brands including Volkswagen, mobile.de, and IDP Connect across automotive, education, and consumer marketplaces.

I'm currently open to new opportunities and actively exploring my next role.

Case Studies

Selected work

Case Studies

01
New B2B SaaS Lead Management 0→1 Automotive Marketplace

Lead Management System —
From Chaos to a Single Inbox

Senior Product Manager · B2B Automotive Marketplace

"€154M in estimated attributed sales tracked within six months of launch."

LMS — from 4 fragmented inboxes to a unified Lead Management System with Lead-to-Sale tracking

Problem

Dealers were receiving buyer enquiries through four separate, disconnected inboxes — each built by a different team, in a different era, with a different design language. There was no unified view, no way to track what happened to a lead after it arrived, and no way for the business to know if its leads were actually resulting in sales. It was a fragmented, seller-hostile experience that nobody had properly named or owned.

Approach

I led the LMS from day zero: making the internal case, running discovery with dealers, scoping the MVP, and driving delivery across engineering, design, and commercial stakeholders. The brief was clear — put dealers first, consolidate the inboxes, and build the infrastructure to track lead outcomes.

The most strategically significant decision was introducing Lead Status — a mechanism for dealers to mark whether a lead resulted in a sale. Simple in concept, transformational in practice. It established the business's first ever Lead-to-Sale (L2S) benchmark, creating a new measurement layer and opening the door to outcome-based conversations with commercial partners.

With four legacy inboxes to replace and stakeholders across five teams, scope control was critical. I made fast, decisive prioritisation calls throughout — constantly pressure-testing what was truly MVP and what could wait — managing competing stakeholder opinions to keep the project on track and on time.

Outcomes

25k+
Dealer users onboarded within the first six months
14k
Car sales tracked for the first time, establishing the L2S benchmark
€154M
Estimated attributed platform transactions within six months
5 teams
Aligned across product, engineering, design, commercial and ops
🏆
Finalist for most impactful project of the year, company-wide

Key insight

With four legacy inboxes and five teams involved, scope could have ballooned fatally. Constant prioritisation discipline — and willingness to say no — was what made on-time delivery possible.

02
New Applied AI GenAI · Gemini Merchant Tooling Automotive Marketplace

AI-Generated Lead Responses
for Professional Sellers

Senior Product Manager · B2B Automotive Marketplace

"Within 30 days of launch, 20% of all written dealer replies in the LMS were AI-generated."

AI-generated lead response feature — before and after AI, showing the LMS conversation interface with Gemini-powered response

Problem

Speed of response is the single biggest predictor of a lead converting to a sale. Dealers are time-poor — managing a forecourt, walk-ins, and a lead inbox simultaneously. Many leads went unanswered, or received generic replies that failed to address the buyer's actual query. Both outcomes were damaging the Lead-to-Sale scores the LMS had made visible for the first time.

Approach

Using the Gemini API, we built an AI Response tool directly inside the LMS. When a dealer opens a lead, the feature generates a ready-to-send, personalised written response — informed by the full conversation history, the dealer's own inventory, and the buyer's behavioural signals from the platform.

A deliberate design decision: the response is editable before sending, not a one-click auto-send. Dealers are professionals and trust in AI output had to be earned incrementally. The goal was to augment dealer judgement, not replace it. This was an intentionally constrained first release — the right scope for a new AI surface in a high-stakes professional tool.

Outcomes

25k
AI-generated messages sent within the first 30 days
20%
Of all written replies in the LMS are now AI-generated
52%
Acceptance rate — a strong quality signal for the model
-34%
Average decrease in lead response time

Key insight

Sellers are professionals, not consumers. Making the AI response editable before sending was essential for trust and adoption. Augment judgement, don't replace it.

03
Consumer App 0→1 Marketplace Education Platform

Mobile App Launch —
70,000 Users, Top 5 Education App

Head of Product · Education Marketplace

"70,000 new student accounts and a 300% increase in returning users — all within the first year."

Whatuni mobile app — before anonymous browsing, after logged-in personalised experience

Problem

The platform had a retention problem disguised as an engagement problem. Users would arrive, find a course, and leave — never to return. This was damaging the quality of referrals sent to university partners (the core revenue source), because universities paying for leads want engaged, informed applicants — not one-and-done visitors. Without registration, there was also no way to track user behaviour meaningfully or pass valuable insights back to partners.

Approach

I led everything hands-on — from making the internal case for a mobile-first product to owning the vision, strategy, and delivery. This was the company's first ever mobile app, which brought significant organisational challenges alongside the usual product ones.

Scope was the biggest risk. Without clear boundaries the project was heading towards a delayed launch — I stepped in, made the hard prioritisation calls, and cut what wasn't truly MVP. That decisiveness is what kept delivery on track and got the app shipped on time across both iOS and Android.

A key strategic decision was making registration central to the experience — giving us the behavioural data to track user journeys and surface meaningful insights for university partners for the first time.

Outcomes

70k+
New student user accounts created within the first year
+300%
Increase in returning users within the first year
Top 5
UK Education apps on the iOS App Store
2 stores
Launched on iOS and Android on time

Key insight

No user testing before launch meant post-launch fixes came at the cost of roadmap reprioritisation. Test with real users before you ship, even if it's scrappy.

04
B2B + B2C 0→1 New Revenue Education Platform

University Application System —
A Better Way to Apply

Senior Product Manager · Education Marketplace

"£730k in net-new revenue in year one — on top of existing revenue streams, not cannibalising them."

Whatuni GO — before stressful phone-based Clearing, after a single digital application system

Problem

University Clearing is the UK's results day — the academic equivalent of Black Friday. For students who didn't get into their first choice university, it's a last chance to secure a place before vacancies fill up within hours. Already dealing with the disappointment of missed grades, these students then had to phone each university individually, managing multiple stressful conversations simultaneously under extreme time pressure — all while terrified of missing out entirely. On the other side, universities were spending heavily staffing call centres to handle the surge — a costly, inefficient operation that still left students frustrated and underserved. Everyone was losing, and no digital alternative existed.

Approach

I identified the opportunity, made the case internally, and led the project end-to-end — working closely with a team across design, engineering, and commercial to take it from concept to launch.

The commercial model was novel: institutions would pay per application received, creating a fresh revenue stream that didn't cannibalise the existing referral business. Getting internal buy-in for an entirely new revenue category required as much stakeholder management as the product work itself.

The hardest constraint was the deadline. Clearing happens on a single day each year — miss it and you wait another twelve months. Working with the team I kept scope tight and focus sharp, shipping a BETA first to run A/B tests and iron out issues before the high-stakes final launch. We hit the date.

Outcomes

2,000+
University applications submitted in the first year
£730k
≈€870k in net-new revenue generated in year one
BETA
Staged launch with A/B testing before the critical deadline
Delivered on time — no Clearing day, no product

Key insight

The deadline was immovable. Clearing happens once a year. Keeping scope tight and the team focused was the only path to shipping.

05
Chatbot Search Personalisation Consumer UX Education Platform

Course Search Chatbot —
Conversation Over Configuration

Senior Product Manager · Education Marketplace

"80% of chatbot users completed a personalised, filtered search — reversing a platform-wide decline in search personalisation."

Luna chatbot — filters vs conversation, showing how Luna guides users to personalised course results

Problem

A counter-intuitive problem: users said in research they wanted personalised results, and the product had a sophisticated filter system to deliver them — but filter usage was falling. The interface wasn't the issue. The behaviour was. Filters require users to articulate their own preferences in the product's language — a significant cognitive ask for someone uncertain about what they want.

Approach

I led the project end-to-end, working closely with the user research team and engineering to take it from concept to launch across both the website and mobile app.

The insight was simple: filters require users to already know what they want and express it in the product's language. A chatbot inverts that — it asks the right questions in plain language and does the translation automatically. Getting the logic right was the easy part.

The harder challenge was tone. After launch we collected feedback directly in the product and ran dedicated user feedback sessions with the research team. Users were clear — the chatbot felt robotic, cold, and off-putting. We iterated fast: the language changed, the tone changed, and even the product name changed based on what users told us. The principle I took from it — that copy and personality are as product-critical as functionality — is one I've applied to every conversational and AI-facing product I've worked on since.

Outcomes

+30%
Average user session duration within 6 months of launch
80%+
Of chatbot users completed a personalised filtered search

Key insight

Copy and personality are as product-critical as functionality. Users who don't trust the language won't trust the recommendations.

Tools

Jira · Confluence · Coda
Notion · Figma · Looker
Google Analytics
Claude Code · Langdock

Sectors

Automotive
Classifieds
Education
Consumer Marketplaces

Languages

English (native)
German (B1)
Spanish (learning)

Work Authorisation

EU citizen
No sponsorship required