Developer Experience as Product · NYC

I make complex platforms land with developers — and the people who fund them.

› |

20+ years across DevRel, AI/ML startups, and product leadership. I've built API platforms to 7-figure ARR, led a $600K → $7.2M turnaround as CPO, and now help AWS startups ship GenAI from POC into production.

See the work →Read the resume ↓

By the numbers

20+years across DevRel, AI/ML startups, and product leadership.
$10MKlout Data Platform revenue, with two-way data partnerships at Twitter, Salesforce & Epsilon.
12×Tagboard ARR — $600K → $7.2M as CPO, churn from 65% to 8%.
350AWS startup founders directly supported or influenced via programs, content, and POCs.
The short version

I sit between founders, developers, and the field.

I'm a product leader who codes. My career has bounced between two poles — running developer ecosystems and turning AI/ML capabilities into products people actually ship. The throughline is empathy for the developer on the other end of the API and the buyer who has to justify the spend.

At AWS I support 25+ AI/ML startups directly — coaching on developer-first positioning, evaluation frameworks, and getting LoRA fine-tunes into real production. Before that I led the Tagboard turnaround as CPO ($600K → $7.2M ARR, churn 65 → 8), and scaled the Klout Data Platform to $10M with two-way partnerships across Twitter, Salesforce, and Epsilon.

On weekends I ship: a fine-tuned MIDI orchestrator, a location-aware AI history app, an MCP server for Cubase, a mortgage calculator for SBLOCs. I trust shipping over slideware.

Developer ExperienceAPI & Platform StrategyAI/ML Productization
GenAI & SLM PlaybooksLoRA Fine-TuningPython · Swift · TypeScriptPyTorch · Lightning · RayAWS Bedrock & SageMakerProduct-Led GrowthDeveloper EvangelismMCP / Agentic Workflows
Selected work · 2011 — 2026

Live products and shipped ML.

Three live sites you can poke at, two ongoing personal AI builds, and the platform turnarounds I'm proudest of.

Live
www.stockstead.com
Mortgage, modeled.
Loan · SBLOC · Tax-loss
LTV
68%
APR
6.4%
SBLOC
$420k
Tax save
$18k

Stockstead

stockstead.com ↗

A mortgage calculator built for high net worth individuals — models SBLOCs, tax-loss harvesting, and portfolio-backed lending. Scenarios no standard calculator handles.

Node.jsTypeScriptSupabaseFinance
Live
www.timeblind.com
09:00 — Today
Time-blind friendly
Deep work
Email triage
Lunch
Calls
Buffer

Timeblind

timeblind.com ↗

A calmer and connected way to budget your hours when ADHD makes the clock invisible. Visual time blocking, friction-light capture, gentle nudges instead of guilt-trips.

TypeScriptReactTime-blockingADHD
Live
forbearance.fun
fore-
bearance
·.fun.·

Forbearance

forbearance.fun ↗

A word game that teaches you to do without.

WebSide project
Building
FOURSQUARE FOR HISTORY

Historic

Foursquare for history — walk up to any landmark, get an AI-narrated podcast on the spot. Fine-tuned Gemma 3 edge models, Swift iOS w/ AR overlays, broadcast-quality TTS pipeline.

PythonSwiftGemma 3Edge MLTTS
Building

Ravel AI — expressive MIDI generation

github.com ↗

An AI-first DAW for professional composer workflows. Trained a custom ML model + tokenizer that generates expressive MIDI — dynamics, articulations, orchestration, and phrasing that sound human.

PyTorchSwiftRayMIDI
Case study
ARR · 2016 → 2024
$600K$7.2M · 12×

Tagboard — turnaround story

Joined as VP Platform during a near-flatline. Alternated between CPO, COO, and CTO to ship 7 revenue-driving products on a unified platform, shifted from freemium to combined sales/PLG, grew product team 1→4 and engineering 4→16. ARR $600K → $7.2M; churn 65% → 8%.

CPOPlatformPLGAPI ecosystems
Case study
API

Klout Platform

Built developer ecosystem from zero. API platform reached 7-figure ARR and 60% of company revenue in two years. Latency cut from hundreds of ms to ~12ms. Exit to Lithium.

APIDevRelNLPPlatform
Where I've operated

Twelve years of platform & product P&L.

2024 — Present

AI/ML Startups Product Specialist

Amazon Web Services (AWS)

  • Authored GenAI/SLM playbooks for LoRA fine-tuning and evaluation frameworks used by founders and field teams to accelerate POC-to-production.
  • Directly supported 25 startups seed → Series B; influenced 350 via events, programs, and content.
  • Drove 15 portfolio activations > $250K ARR within 6 months through demos and developer-first positioning.
  • Influenced $1.2M+ in net-new cloud consumption on Bedrock & SageMaker.
2016 — 2024

Chief Product Officer

Tagboard

  • Led turnaround as CPO/COO. ARR $600K → $7.2M; churn 65% → 8%.
  • Launched 7 revenue-driving products on a unified platform; shifted freemium → combined sales + PLG motion.
  • Grew product team 1 → 4 and engineering 4 → 16 within 12 months.
  • Owned third-party API platform & ecosystem integrations across Twitter, Facebook, Instagram, Snap, Reddit.
2018 — 2019

Product Consultant

Canvs AI

  • Built the Product + Data Science operating system needed to scale; mentored org from 1 → 3 PMs.
  • Restructured emotion + topic models from ~70% to ~85% precision/recall.
  • Improved CS efficiency 120% with human-in-the-loop labeling.
2014 — 2016

VP & GM, Klout & Consumer Data

Lithium Technologies

  • Brought community personalization + priority routing to market in 6 months — tied to $50M+ influenced pipeline.
  • Integrated Klout's influence + consumer data into Lithium's platform; managed a 10-person cross-functional team reporting to CEO.
  • Scaled Klout Data Platform to $10M revenue w/ partnerships at Twitter, Salesforce, Epsilon.
2011 — 2014

Developer Evangelist → Director, Platform Product

Klout (exited to Lithium)

  • Productized API platform → 7-figure ARR, 60% of company revenue in two years.
  • Lifted freemium → enterprise developer conversion +280% y/y.
  • Shipped Topical Influence Scoring (NLP), Identity Resolution, Bulk Enrichment, SDKs. API latency hundreds of ms → ~12ms.
  • Spoke at 20+ events globally (APIDays, API Strategy & Practice, Business of APIs).
Resume · at a glance

The receipts.

A condensed tour of the work and the outcomes. Full PDF mirrors this — no surprises.

Outcomes

  • ARR grown $600K → $7.2M (Tagboard)12× growth as CPO
  • Churn 65% → 8% (Tagboard)Customer-need focused roadmap
  • $10M Klout Data PlatformTwitter / Salesforce / Epsilon
  • $1.2M net-new cloud consumptionAWS Bedrock + SageMaker
  • +280% y/y dev conversion (Klout)Productized API insights
  • API latency 100s ms → ~12msKlout Platform

Craft

  • GenAI/SLM playbooks (LoRA, eval)Used by founders + AWS field
  • API versioning & deprecation policyKlout — held SLAs through expansion
  • Topical Influence Scoring (NLP)Identity Wheel, Bulk Enrichment, SDKs
  • Data-Driven Graphics platformTagboard — 200% new customer growth
  • Human-in-the-loop labeling programCanvs — 120% CS efficiency

Range

  • Founding-team builder (Klout, Tagboard turnaround)0→1 and 1→N both
  • Comfortable in codePython, Swift, TypeScript, PyTorch
  • Stanford ML SpecializationDeepLearning.AI · 2024 — present
  • Operator + evangelist20+ talks · publications · field enablement
  • Reports up; hires; mentorsTeams of 10–20 across product, eng, DS
Download PDF ↓LinkedIn ↗Last updated · April 2026
Writing

Notes from the platform trenches.

Speaking & Publications

On stage about APIs, ecosystems, and AI.

2026

APIDays NYC

How AI Learned To Stop Worrying And Love The Scrape

2024

EU Science Commission

Unfolding opportunities from APIs in Europe — quoted publication

2014

APIDays

Paris · API platform strategy

2014

API Strategy & Practice

Chicago · Monetizing platform data

2013

The Business of APIs

NYC · Identity resolution at scale

2013

AngelHack

SF · Developer onboarding workshops

2012

ReCommerce Day

Influence-driven distribution

Let's build something

Looking for a founding DevX leader, AI product owner, or platform GM. I read every email.

devtysingletary@gmail.com →LinkedInGitHubSubstack

New York, NY · 415-734-1451 · open to remote, hybrid NYC, or onsite for the right role