CRO Engineer

About the Job

Own the conversion engine of a portfolio of high-growth consumer apps full-stack web, experimentation infrastructure, analytics, and the entire CRO motion at a profitable consumer app studio scaling fast.

This is not a "marketer who occasionally runs an A/B test" role. You'll own conversion rate optimization end-to-end across our web properties: the landing pages and funnels themselves, the experimentation infrastructure powering tests, the event taxonomy and analytics layer, the data model behind it, and the engineering work to turn hypotheses into shipped experiments fast.

You'll be working on consumer products where every percentage point of conversion translates directly to revenue at scale which means the engineering bar is high and the stakes are real. AI-assisted development is core to how we work, not a buzzword.

About Triplespeed

We build and scale viral consumer apps for global markets. Multiple apps past $10M/yr in revenue, profitable, and growing fast. Lean team, no bureaucracy, ship-fast culture. We're now investing heavily in CRO and growth engineering and need to work with a senior engineer to own it end-to-end.

Key Responsibilities

Experimentation and CRO

Design, ship, and analyze A/B and multivariate tests across acquisition, activation, and monetization funnels

Own the experimentation roadmap prioritize tests by impact, confidence, and time-to-learn

Run statistically rigorous experiments with proper sample sizing, significance thresholds, and guardrail metrics

Translate qualitative signal (session replay, heatmaps, user research, support tickets) into testable hypotheses

PostHog and analytics

Own the PostHog instance end-to-end event taxonomy, feature flags, experiments, session replay, surveys, dashboards

Build and maintain the event tracking layer across web and backend

Run funnel, retention, and cohort analysis to surface conversion bottlenecks

Wire PostHog into the broader data and growth stack

Full-stack web development

Build and ship landing pages, funnel variants, and full web experiences (React / Next.js, TypeScript)

Own the backend / API layer behind the funnel server-side experimentation, edge personalization, performance

Own the PostgreSQL schema and transactional SQL the data layer is yours

Ship fast without breaking core conversion paths

Growth tooling and integrations

Build internal tooling so marketing and growth can run experiments without engineering bottlenecks

Own attribution, pixel, and ad platform integrations with the discipline a revenue-critical system demands

Maintain page speed, Core Web Vitals, and SEO health across the funnel

AI-assisted workflow

Work day-to-day with Claude Code, Cursor, and MCP-based agent tooling

Who Can Apply

We care about what you've shipped and the wins you can point to, not how many years it took. That said, this role realistically needs the judgment that comes from running a real experimentation program at scale.

You should have:

A track record of conversion wins you can speak to in concrete numbers lift, sample size, what you learned, what you killed

The ability to operate as a senior IC owning scope, making architectural calls, and shipping without hand-holding

Strong written communication for experiment briefs, readouts, post-mortems, and async collaboration

Comfort working in-office in Bangalore on a small, senior team

Required Skills

Senior-level full-stack web development (React / Next.js, TypeScript, Node.js)

Deep PostHog experience event design, feature flags, experiments, session replay, dashboards, SQL-on-events

Strong statistics fundamentals sample sizing, significance, common A/B testing pitfalls (peeking, novelty, SRM)

Strong backend skills PostgreSQL, transactional SQL discipline, API design

Proven CRO track record landing pages, signup and checkout flows, pricing tests, paywall optimization

Genuine experience with AI-driven dev workflows (Claude Code / Cursor / MCP) actual agent-tool integration, not surface-level prompt usage

Strong OOP and async patterns

Bonus / Nice-to-Have Experience

Real-money or fintech-adjacent product experience

Other analytics stacks Mixpanel, Amplitude, GA4, Segment, Snowplow

SEO and Core Web Vitals optimization at scale

AppsFlyer / SKAdNetwork / mobile attribution stacks

Server-side and edge experimentation (Vercel Edge, Cloudflare Workers)

AWS (RDS, S3) in your daily toolkit

Experience scaling experimentation programs from low to high test velocity

What We Offer

Full ownership of a meaningful surface area, not a slice of someone else's roadmap

A small, senior team where decisions happen in hours, not sprints

Direct collaboration with founders on what to test and why

• Compensation calibrated to senior engineers with a shipped track record