What I Built

Scope, side by side

Breadth changed shape

At PostHog my breadth was languages and depth in one product area. At Tano it is products.

Measure of scope	PostHog · 3.7 years	Tano · 8 months
Projects	17	24
New products and systems built from nothingthe rest extended, hardened or migrated existing ones	4	9
Company-wide migrations	Contributed to 1, led 1	Led 4
Projects in flight in a typical month	2	6
Third-party services integratedPostHog builds most things in-house, which lowers its count	3	14
Changes to the data modelschema migrations I wrote	15	211
Languages I shipped inthe SDKs spread PostHog work across many languages	7	2

When each area was active

PostHog · May 2021 – January 2025 · 3.7 years

Tano · January – September 2026 · 8 months

One row per area of work, one cell per month. A cell's shade is how many of my merged PRs touched that area that month: light is 1–2 PRs, main focus is more than 20. Covers all 859 PostHog PRs and 1,638 Tano PRs. In a typical month I was working on about 6 projects at Tano (up to 9), and about 2 at PostHog (up to 5).

Every project

The headline projects, and everything else

PostHog · 2021–202517 projects

Experimentation platform

new product

Dec 2021 – Nov 2024

0.5s

results computed, down from 10s

/decide resilience and scale

reliability and scale

Jun 2021 – Jul 2024

100K

flag requests a minute, with zero downtime when Postgres went down

Person-on-events

migration

May 2022 – May 2023

400%

faster queries involving persons and events, at best

Local evaluation of flags

new system

Jul 2022 – Aug 2023

4×

fewer database queries for server-side flags

SDKs

major extension

May 2021 – Oct 2024

server SDKs with local flag evaluation

Surveys

major extension

Jul 2023 – Apr 2024

+40%

conversion for users trying surveys, after removing an opt-in step

Also shipped · 11

Plugins and integrationsMay 21–Oct 23
Docs, posts and RFCsMay 21–Jul 24
Funnels, paths and groupsJun 21–Nov 24
Correlation analysisOct 21–Apr 23
Cohorts and personsOct 21–Apr 24
Universal search and notebooksApr 22–Sep 23
Flag targeting and rolloutMay 22–Oct 24
CI speed-up and Rust monorepoJun 22–Jun 24
Capture and API hardeningJan 23–Apr 24
Early access featuresMay 23–May 23
Error tracking (early)Aug 24–Jan 25

Tano · 202624 projects

Affiliate platform build

new product

Apr 2026 – Sep 2026

$350K

attributed revenue, load-tested at 1,000 requests a second

Workflow orchestration engine

new system

Feb 2026 – Sep 2026

97K+

AI-run creator collaborations

Content monitoring in Go

major extension

Mar 2026 – Sep 2026

20M+

creator post checks

Negotiation engine

major extension

Feb 2026 – Aug 2026

$1M+

accepted creator-deal value

Collaborations to partners

migration

Aug 2026 – Sep 2026

13,345

partners moved in a single brand cutover

Creator identity consolidation

migration

Aug 2026 – Aug 2026

242K

contacts backfilled in nine days

Also shipped · 18

Collaboration agent reliabilityFeb 26–Sep 26
Checklists to workflow orchestrationFeb 26–Jul 26
Developer tooling and CIFeb 26–Sep 26
Upload portal and content reviewFeb 26–Sep 26
Login, permissions and observabilityFeb 26–Sep 26
Partner cockpit and sourcingFeb 26–Sep 26
Customer dashboards and Mission ControlMar 26–Aug 26
Contracts and e-signatureMar 26–Jun 26
Creator paymentsMar 26–Sep 26
Model routing and evaluationMar 26–Sep 26
Support tickets and escalationMar 26–Sep 26
Content library and ad codesMar 26–Sep 26
Gift shippingApr 26–Sep 26
Migration off ReferzoneApr 26–Aug 26
Cost and P&L trackingMay 26–Sep 26
Automated multi-currency payoutsJul 26–Sep 26
Partners, segments and activationsJul 26–Sep 26
Partner agentJul 26–Sep 26