Contract Senior Data Analyst (SQL,Telemetry,Browser Engine)
- Level
- Senior
- Work type
- Remote · UK only
Not stated in the posting: salary, visa.
Open. First seen 26 October 2026.
About the role
The Gecko platform is the core engine of our product experience. To maintain competitiveness and user satisfaction, we must move beyond surface-level metrics to understand the deep correlations between engine performance and real-world user behavior. We currently face challenges with data quality, such as bot contamination in nightly telemetry, which obscures our understanding of true performance trends.
A dedicated analyst is required to bridge the gap between engineering telemetry and actionable product strategy, ensuring that leadership has high-fidelity data to prioritize performance guardrails and technical budgets.
Engineering Deliverables
- Automated Dashboards: Create and maintain high-level overview dashboards that translate complex performance data into consumable formats for Product Managers and leadership.
- Telemetry Gap Analysis: Audit the Gecko codebase to identify missing collection points or "probes" necessary for a complete understanding of the product experience.
- Data Sanitization Frameworks: Develop methodologies and tools to identify and filter data inconsistencies, specifically focusing on isolating bot traffic and hardware-specific noise from telemetry streams.
- Behavioral Inference Reports: Deliver deep-dive analyses correlating technical performance shifts (e.g., LCP, eTLD+1) with user-facing pain points and engagement trends.
Scope, Skills, and Effort Estimate
Scope
The analyst will focus exclusively on Gecko engine telemetry across multiple platforms (Desktop and Android), collaborating with the Performance Team, Data Team, and Product Leadership.
Required Skills
- Technical: Advanced SQL (BigQuery/Redash), proficiency in data visualization using AI tooling, and experience with statistical analysis (e.g., Pearson’s correlation, multivariate analysis). Knowledge of Rust/C++ is a strong plus. Strong proficiency with AI tools like Claude Code, Codex, or similar is highly desirable.
- Domain Knowledge: Ability to understand browser component interactions and their impact on user experience.
- Soft Skills: Proven ability to work independently, translating technical requirements into business insights.
- Independent problem solving: Comfortable working in unfamiliar technical problem spaces and figuring out a path forward with minimal guidance, using documentation, experimentation, source code, data, and other available resources.
Hiring Ranges:
Remote UK
£58,500—£78,000 GBP
What this role asks for
Particular to this role
Android · BigQuery
Rare in Mozilla's other 96 open postings.
Standard for data / BI analysis roles
SQL
Common in data / BI analysis postings at any company.
Compared with Mozilla's other open jobs.
The team: Firefox HIRES STEADILY
This role is one of 60 open in Firefox. 39 were posted in the last 30 days and the oldest in February: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
C++ (36 of 60), JavaScript (34 of 60), Rust (30 of 60), Python (26 of 60), CI/CD (18 of 60), TypeScript (18 of 60), Android (14 of 60)
OTHER ROLES ON THIS TEAM
- Senior iOS Engineer posted Nov 4
- iOS Software Engineer posted Nov 4
- iOS Software Engineer posted Nov 4
- Contract Staff Software Engineer - (Firefox) C++,Storage Encryption posted Oct 26
- Contract Sr Data Analyst (SQL,Telemetry,Browser Engine) posted Oct 26
- Staff Software Engineer, Tools & Systems posted Oct 22
- Staff Software Engineer, Tools & Systems posted Oct 22
- Staff Software Engineer, Tools & Systems posted Oct 22
- Staff Software Engineer, Tools & Systems posted Oct 22
- Staff Software Engineer, Tools & Systems posted Oct 22
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- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Senior Software Engineer, Privacy posted Oct 22
- Staff Software Engineer, Tools & Systems posted Oct 22
- Senior Contract Software Engineer (JavaScript) - Firefox posted Oct 20
- Senior Contract C++ / JavaScript Software Engineer Firefox (Browser Engine) posted Oct 20
- Senior Contract Web Developer - Firefox (Browser Engine) posted Oct 20
- Contract Staff Software Engineer - (Firefox) C++,Storage Encryption posted Oct 20
- Contract Staff Software Engineer-Bug Burndown posted Oct 20
- Contract Staff Software Engineer-Bug Burndown posted Oct 20
- Senior Software Engineer, Firefox Security posted Oct 15
- Senior Software Engineer, Firefox Security posted Oct 15
- Senior Software Engineer, Firefox Security posted Oct 14
- Senior Software Engineer, Firefox Security posted Oct 14
- Senior Software Engineer, Firefox Security posted Oct 14
- Senior Software Engineer, Firefox Security posted Oct 14
- Senior Software Engineer, Firefox Security posted Oct 14
- Senior Software Engineer, Firefox Security posted Oct 14
- Contract Sr Data Analyst (SQL,Telemetry,Browser Engine) posted Oct 12
- Contract Staff Software Engineer – WebCompat & Bug Triage posted Oct 6
- Senior Contract C++ / JavaScript Software Engineer (Browser Engine) posted Sep 22
- Contract Staff Software Engineer-FireFox Layout posted Sep 22
- Contract Staff Software Engineer - Performance Graphics (C++,Rust, WebGL) posted Sep 22
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Software Engineer, Add-Ons posted Sep 15
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Product Manager, Mobile posted Aug 24
- Senior Software Engineer, Add-Ons posted Feb 9
From the team and dates on Mozilla's own job board.
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