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Selected Work

Products that moved the needle.

I own the supply side of a marketplace: the APIs, listing systems, and data pipelines behind what buyers search, find, and trust. Four problems I took on, and what changed.

By Abhi Yoheswaran

Flagship Case Study

Re-Architecting a Partner API Ecosystem Serving 7,000+ Dealers

A fragile integration layer carrying 250,000+ listings a year, rebuilt without breaking buyer-facing data quality or dealer trust in the transition.

40%
Reduced manual entry time
55%
Increased API adoption
20%
Higher structured data completeness
10+
New buyer search filters enabled
30%
Faster cross-functional decisions
250,000+
Listings via partner APIs (2025)
7,000+
Unique dealers (2025)
99.99%
Partner API uptime

The Challenge

Our marketplace's dealer ecosystem depended on fragmented legacy integrations. The API layer was mission-critical, powering thousands of listings and feeding the structured data that buyer-facing systems (search, recommendations, listing pages) depend on.

The system was brittle and hard to scale, with every new partner adding onboarding friction and support load. A feed format mismatch or missed endpoint change would surface not as an alert, but as incomplete listing data visible to buyers, sometimes for hours before anyone noticed. New partner integrations required manual intervention and could take weeks to go live.

What I Did

  1. Designed the Next-Gen API Platform

    Led a full re-platforming of partner-facing APIs, shifting from manual entry dependency to structured data-driven ingestion for 7,000+ dealers across the ecosystem. We chose to build a new structured ingestion layer rather than patch the existing XML feeds. A longer initial runway, but the only path to data completeness that buyer-facing search and recommendations could reliably depend on.

  2. Owned Reliability as a Product Metric

    Treated uptime, data consistency, and integration tickets as first-class product KPIs, with observability and adoption tracking across endpoints.

  3. Orchestrated Enterprise Migration

    Aligned engineering, product support, sales, and key accounts to reduce rollout risk, managing system transition without disrupting marketplace liquidity or the buyer-facing data quality downstream teams depend on. We ran both systems in parallel during migration rather than cutting over hard, accepting months of operational overhead to protect marketplace liquidity.

Impact

Converted a fragile integration layer into a scalable partner platform. Structured data completeness improved by 20%, enabling 10+ new buyer search filters with over 80% data coverage across the marketplace.

API StrategyPlatform ArchitectureB2BEnterprise Migration
By Abhi Yoheswaran

Case Study 02

Scaling the Listing Platform to Increase Liquidity and Dealer Adoption

In a marketplace, speed equals liquidity. Cutting listing creation time from 15 minutes to 6.5, and building the experimentation rails to measure downstream effects.

35%
Faster time-to-market

Impact

Increased inventory velocity and seller efficiency. Higher listing completeness reduced listing page bounce rates by 34% and improved search relevance for buyers across the marketplace.

Marketplace LiquidityExperimentationAutomationData Quality
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20%
Dealer adoption increase
18%
Listing completion rate
12%
Reduced seller drop-offs
30%
VIN lookup adoption
45%
Fewer manual data errors

The Challenge

Dealer workflows were slowing inventory velocity. Listing creation was manual, slow, and inconsistent.

With no VIN lookup, a dealer listing a vehicle entered every attribute by hand: make, model, trim, engine spec, field by field, averaging 15 minutes per listing. Structured data was incomplete enough that key buyer search filters could not be reliably enabled at scale.

What I Did

  1. Automated Core Listing Workflows

    Scaled structured listing infrastructure, cutting average listing creation time from 15 minutes to 6.5 minutes and improving ingestion quality.

  2. Built an Experimentation Engine

    Designed a structured A/B testing framework embedded into listing workflows. We chose to build a lightweight framework directly into the listing flow rather than wait for a platform-wide testing tool, trading some statistical sophistication for faster iteration.

  3. Strengthened Vehicle Data Services

    Optimised VIN identification and vehicle data services used by external partners, increasing structured data adoption and reducing manual errors.

By Abhi Yoheswaran

Case Study 03

Launching AI-Powered Listing Descriptions in a Marketplace Core Flow

Building a generative AI product from scratch inside the marketplace listing flow, with no prior AI infrastructure and no validated demand.

22%
Increased listing engagement

Impact

Proved that better seller-side content lifts buyer engagement and lead conversion. One product moved both sides of the marketplace.

0→1 ProductGenerative AIA/B TestingConversion OptimizationContent Automation
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15%
Higher lead conversions
<2 min
Description time vs. ~12 min manual avg

The Challenge

Dealer-generated listing descriptions were inconsistent, low quality, and performance-sensitive. Descriptions written manually ranged from a single sentence to copy-pasted marketing text, with no consistency and limited correlation to actual buyer engagement. There was no AI infrastructure in place; we lacked generative workflows, a clear adoption path, and an experimentation baseline.

This was a zero-to-one product with no baseline to lean on. It shipped without validated demand, and without any guarantee dealers would trust automated copy or that engagement would hold.

What I Did

  1. Framed the Bet Up Front

    Defined the product bet upfront: if we automate structured listing descriptions aligned with vehicle attributes, we should increase engagement and lead conversion while reducing seller effort. We scoped v1 to AI-suggested descriptions only, with no dealer editing or customisation controls. Stakeholders wanted more dealer control from day one; we pushed back to isolate the quality signal before adding complexity.

  2. Built the Experimentation Layer First

    Before scaling AI output, designed success metrics, defined quality guardrails, structured A/B validation, and ensured reversibility. We delayed go-live to instrument measurement properly. Shipping first and measuring retroactively was the path of least resistance, and we did not take it.

  3. Embedded Into Workflow With Minimal Friction

    Integrated AI suggestions into listing creation rather than forcing review-heavy editing flows.

By Abhi Yoheswaran

Case Study 04

Building Mission-Critical HR Data Infrastructure for a Global Enterprise

Designing the HR data backbone for a global pharmaceutical enterprise, where a single data error can mean a missed paycheck or a compliance incident.

40%
Process efficiency improvement

Impact

Transformed fragmented HR systems into a unified data platform that powers payroll, compliance, and workforce operations across the enterprise.

Enterprise PlatformAPI InfrastructureData GovernanceRegulated Environment
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5+
Business units on one platform
0
Compliance incidents post-launch
30%
Faster downstream development
20%
Faster release cycles
40%
Fewer post-launch issues

The Challenge

A global pharmaceutical enterprise relied on fragmented, legacy HR systems. Payroll, compliance reporting, and cross-department data access were bottlenecked by inconsistent data flows and manual processes. A wrong cost centre or missed employee record could delay a paycheck or trigger a compliance audit in markets with strict employment law.

The organisation needed a unified data backbone: core HR APIs and automated pipelines that give business units real-time access to governed, audit-ready data.

What I Did

  1. Built Core HR APIs & Data Pipelines

    Designed and delivered a suite of enterprise-grade APIs that standardised how HR data was accessed across payroll, workforce planning, and compliance, replacing fragmented manual processes with reliable, governed data services.

  2. Automated Data Access & Governance

    Implemented automated data provisioning and governance controls, reducing manual data requests and ensuring consistent, auditable access across business functions in a regulated environment.

  3. Defined the Product Roadmap Across Competing Workstreams

    Owned prioritisation and trade-off decisions across a CHF 2.5M investment spanning multiple workstreams. We sequenced payroll and compliance data first, delaying workforce analytics features that had stronger stakeholder demand. In a regulated environment, the wrong sequence means audit exposure, not just delayed features.

Have a platform problem like one of these?

If you're untangling a fragile integration layer, scoping a 0-to-1 bet with no baseline, or building a data platform people have to trust, that is the work I do best. Tell me about yours.