OpenSource Tech Stack

Technical recruitment for product and engineering teams

Software Development London, England 2–10 employees Founded 2018 Privately Held

OpenSource is a founder-led recruitment firm built by a former software developer and a seasoned tech recruiter. The company specializes in hiring across backend, frontend, DevOps, data, and AI roles, operating on contingent, retained, and RPO models. Their tech stack (Python, SQL, dbt, Snowflake, BigQuery, AWS) reflects deep familiarity with modern data and infrastructure tooling—the founders screen every candidate technically themselves rather than delegating to non-technical sourcers.

Tech Stack 11 technologies

Core Stackdbt Python Snowflake BigQuery Redshift Iceberg AWS Linux C SQL Claude

What OpenSource Is Building

◆Challenges

Sophisticated network-level threats
Extreme traffic conditions
Performance scalability trade-offs
Scaling modern data platform
Improving data freshness and reliability
Optimising data warehouse performance
Reducing ambiguity in data processes
Improving operational processes
Reverse-engineering third-party data sources
Low-latency real-time data pipelines

▲Active Projects

Design and scale distributed traffic filtering system
Build automated threat detection and mitigation platform
Improve low-latency network security services
Analytics-ready data models
Elt pipelines for reporting
Data warehouse optimisation
Operational process refinement
Data translation improvement
Reverse-engineering third-party data source integrations
Low-latency real-time data pipelines

Hiring Activity

Accelerating5 roles · 3 in 30d

Department

Engineering

Data

Product

Seniority

Senior

Manager

Mid

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About OpenSource

OpenSource places engineers and data specialists into product and engineering teams at VC-backed startups and scale-ups. Founded in 2018 by George (formerly a software developer) and Harry (with a decade of recruiting experience), the firm operates from London with a lean team of 2–10 people. They work on three engagement models: contingent (pay-per-hire), retained (dedicated recruiting with upfront commitment), and RPO (fully embedded for high-volume hiring). Every candidate undergoes technical screening by the founders before introduction, addressing a common pain point in tech hiring where non-technical recruiters miss nuanced fit.

HeadquartersLondon, England

Company Size2–10 employees

Founded2018

Hiring MarketsGermany, United Kingdom

Frequently Asked Questions

Who founded OpenSource and what's their background?

George (former software developer) and Harry (recruiter with a decade of experience scaling teams at VC-backed startups). Both sit on both sides of the hiring table.

What is OpenSource's hiring engagement model?

Three options: contingent (pay only on hire), retained (dedicated recruiter with upfront commitment), and RPO (fully embedded team for high-volume strategic hiring).