Post a Job
All remote jobs
Mozilla

Contract Senior Data Analyst (SQL,Telemetry,Browser Engine)

Review the role, location requirements, compensation details, and application process before deciding whether this opportunity fits your next career move.

Apply for this job View company
Remote from
UK
Salary
GBP 58,500–78k / yr
Department
Data Science & Analytics
Employment
Contract
Experience
Senior
Published
Apply before
26 Nov 2026
Listing views
36
Application actions
4
Application toolkit

Make your next move.

Prepare your resume, explore your fit, and draft a cover letter for this opportunity.

AI Summary

The role, at a glance.

Mozilla is seeking a senior contract data analyst to improve the quality and usefulness of Gecko browser-engine telemetry across desktop and Android. The role builds executive-facing dashboards, audits instrumentation gaps, and develops methods to remove bot traffic and hardware-related noise. It also produces analyses that connect performance measures such as LCP and eTLD+1 with user experience and engagement outcomes. Success requires advanced SQL, statistical reasoning, visualization skills, browser-domain curiosity, and the ability to work independently with engineering, data, and product stakeholders.

Role DNA

A quick view of the complexity, pace, ownership and collaboration implied by the job description.

Job Complexity

5/5
EasyHard

Pace & Pressure

4/5
RelaxedFast-paced

Autonomy Level

5/5
GuidedFull ownership

Communication Load

4/5
IndependentCollaborative
AI insightThis is a senior, technically specialized analytics role involving imperfect high-volume telemetry, statistical inference, and browser-engine concepts. The analyst must independently turn ambiguous engineering data into reliable product decisions for leadership.

Salary analysis

Estimated compensation compared with the broader UK market for similar roles.

Estimated job median (per year)Market rate
£68,250
UK market range (per year)£60k–£85k
AI insightThe yearly pay period is inferred from the job context; it was not explicitly stated by the employer. The employer discloses a GBP 58,500–78,000 hiring range but does not state a cadence; yearly pay is inferred from the range magnitude, seniority, UK location, and standard professional compensation conventions. The midpoint is £68,250 per year. Estimated UK market pay for a senior contract data analyst with telemetry and browser-performance specialization is approximately £60,000–£85,000 per year.

Core skills

Skills and capabilities most closely associated with this opportunity.

Advanced SQLBigQueryRedashData visualizationStatistical analysisMultivariate analysisPearson correlationTelemetry analyticsData qualityBot traffic detectionDashboard developmentBrowser performance analysisProduct analyticsRustC++
Sample interview questions
How would you identify and mitigate bot contamination in browser telemetry?

I would profile suspicious traffic using behavioral, volume, timing, client, and event-pattern features, then validate candidate filters against known-good cohorts. I would implement transparent exclusion rules, measure their effect on key metrics, and monitor the rules for drift so legitimate users are not unintentionally removed.

Describe how you would investigate whether an LCP regression is affecting user engagement.

I would define the affected release and user cohorts, verify instrumentation consistency, and compare LCP distributions before and after the change. I would control for platform, hardware, geography, network conditions, and bot traffic, then use regression or stratified analysis to assess the relationship with engagement metrics and communicate both effect size and uncertainty.

What makes an executive performance dashboard useful?

It should focus on a small set of decision-oriented metrics, clearly show trends and guardrail breaches, and provide drill-down paths by platform, release, and key cohorts. I would document metric definitions, data freshness, and known limitations so leadership can interpret the information with confidence.

How would you find missing telemetry probes in a large codebase?

I would start with the product questions and desired user journey, map existing events to those questions, and identify blind spots in states, transitions, and outcomes. Then I would review relevant source code and instrumentation patterns with engineers, propose minimal high-value probes, and validate their schema, sampling, privacy, and downstream usability.

How do you work effectively when entering an unfamiliar technical problem space?

I establish the decision to be supported, review documentation and existing data definitions, and form small testable hypotheses. I use exploratory queries and experiments to learn quickly, seek targeted input from domain experts, and share assumptions and findings early so the work stays aligned with stakeholder needs.

This analysis is generated from the job description. Salary estimates, role characteristics and sample answers are guidance, not employer-provided facts.
Opportunity details

About this 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

Apply now >

This job listing has been manually reviewed by the Jobicy Trust & Safety Team for compliance with our posting guidelines, including verification of the company's legitimacy, accuracy of job details, clarity of remote work policy, and absence of misleading or fraudulent content.

Next step

Apply now.

Follow the employer’s application method and review Jobicy’s safety guidance before sharing personal information.

Did you apply?Let us know, and we’ll help you track your application.

Continue on the employer website

Protect your personal information and never pay to secure an interview or job offer. .

Log in to save
One quick step before you apply

Sign in to continue.

Sign in or create a free account to continue to the employer's application.

Applying is free. After signing in, return to this job and select Apply Now.
Add alert
Job Search Safety Tips
Here are some tips to help you search and apply for jobs safely:
Watch out for suspicious jobs Don't apply for jobs that offer high pay for little work or offer to hire you without an interview. Read more ›
Check the employer's profile Make sure you're applying for a trustworthy job by visiting the employer's profile and learning more about them. Read more ›
Protect your information Don't share personal details like your bank account or government-issued ID on suspicious websites or messengers. Read more ›
Report jobs that feel unsafe If you see a job that seems misleading, inappropriate or discriminatory, report it for going against our policies and we'll review it.
Share this job
Jobs Talent AI Tools Salaries
Menu