OnBuy Tech Stack

European marketplace connecting retailers to millions of buyers with cashback rewards

Technology, Information and Internet London 51–200 employees Founded 2016 Privately Held

OnBuy is a UK-based online marketplace that partners with retailers rather than competing directly with them — a structural advantage that shows in their product roadmap. Their tech stack spans Python, BigQuery, Airflow, and GCP for data pipelines, paired with Laravel and modern JavaScript frameworks (React, Vue, Angular) on the frontend. The hiring velocity is accelerating with 19 roles posted in the last month, heavily skewed toward product (9) and senior/lead levels (16 of 19), suggesting rapid scaling of both platform capabilities and go-to-market motion.

Tech Stack 35 technologies

Core StackPython BigQuery Airbyte PHP Laravel JavaScript React Vue Angular MySQL Couchbase MongoDB RabbitMQ Docker Snowflake Databricks Redshift Kubernetes Apache Airflow Fivetran Pub/Sub GCP Solr Google Shopping Bing IAM Cloud Run Artifact Registry GCS Stitch+5 more

What OnBuy Is Building

◆Challenges

Scaling performance marketing engine
Currency localisation challenges
International checkout complexity
Inconsistent catalogue quality
Scaling inbound seller acquisition engine
Balancing cpl and cpa
Driving seller quality
Improving product categorisation at scale
Raising catalogue data quality
Identifying catalogue gaps

▲Active Projects

End-to-end buyer journey
Product categorisation system
Payment localisation implementation
Pricing competitiveness insights system
Catalogue decisioning engine
Checkout and payment roadmap
Scalable growth engine
Vendor and tooling strategy
Performance marketing team structure
Recommendation engine development

Hiring Activity

Accelerating20 roles · 20 in 30d

Department

Product

Engineering

Marketing

Seniority

Senior

Lead

Mid

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About OnBuy

OnBuy operates a European online marketplace where third-party retailers sell to millions of buyers, who earn instantly redeemable cashback on purchases. Founded in 2016 and based in London, the company has grown to 51–200 employees while maintaining a model where OnBuy never holds inventory or competes with its seller partners. The platform spans product development, engineering, and marketing teams driving expansion across multiple geographies. Current operational priorities include scaling international checkout workflows, improving seller-side catalogue quality, and building algorithmic systems for pricing competitiveness and product recommendations.

HeadquartersLondon

Company Size51–200 employees

Founded2016

Hiring MarketsUnited Kingdom

Frequently Asked Questions

What tech stack does OnBuy use?

OnBuy runs on Python, PHP with Laravel, and JavaScript frameworks (React, Vue, Angular). Data infrastructure includes BigQuery, Snowflake, Redshift, Airflow, and Airbyte. Cloud platform is Google Cloud Platform (GCP) with Kubernetes orchestration, supplemented by Databricks and Couchbase for specific workloads.

What is OnBuy working on?

Current projects include end-to-end buyer journey optimization, product categorisation at scale, international payment localisation, pricing competitiveness insights, a recommendation engine, and a scalable growth engine. Projects reflect focus on international expansion and data-driven decisioning.

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How this profile is built

OnBuy's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.