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Field notes from production AI.

Long-form essays from the engineers shipping AI inside payers, hospitals, energy operators and proptech platforms. Written for technology leaders who care more about what runs in production than what trended last week.

All essays

Field notes, sorted by recency.

1395 essays
TECHNOLOGY Risk StratificationModels in Production:Calibration and Drift. Risk stratification models can beaccurate in development and clinically… RISKSTRATIFICATION DO Define ownership earlyMeasure before scalingBuild for observability AVOID Unclear accountabilityPremature optimizationBlack-box systems
Insights · May 26, 2026

Risk Stratification Models in Production: Calibration and Drift

Risk stratification models can be accurate in development and clinically wrong in production. The gap usually traces to calibration and drift issues. Here are the patterns that catch the issues…

7 min read
TECHNOLOGY HealthcareInteroperability BeyondFHIR: HL7v2, X12, andthe Real Mix. FHIR gets the attention. The reality ishealthcare data still flows through… STRATEGY DELIVERY GOVERNANCE SCALE HEALTHCAREINTEROPERABILITY
Insights · May 25, 2026

Healthcare Interoperability Beyond FHIR: HL7v2, X12, and the Real Mix

FHIR gets the attention. The reality is healthcare data still flows through HL7v2, X12, custom formats, and PDFs. Engineering teams that handle the real mix produce more reliable platforms than…

7 min read
TECHNOLOGY Population Health AI:From Cohort Definitionto Intervention Delivery. Population health AI work that producesresults follows a recognizable path from… 01 Pilot 02 Team 03 Org 04 Scale POPULATION HEALTH
Insights · May 25, 2026

Population Health AI: From Cohort Definition to Intervention Delivery

Population health AI work that produces results follows a recognizable path from cohort definition through intervention delivery. The patterns that work share four characteristics. Here is the…

7 min read
TECHNOLOGY Commercial Real EstateAI: Asset Management andInvestment Analytics. Commercial real estate AI has emerged asdistinct from residential AI through… 01 Assess 02 Design 03 Ship 04 Operate
Insights · May 25, 2026

Commercial Real Estate AI: Asset Management and Investment Analytics

Commercial real estate AI has emerged as distinct from residential AI through 2024 and 2025. Four use case categories cover most production deployments. Here is the practitioner reference for…

8 min read
TECHNOLOGY Predictive Maintenancefor CommercialProperties: AI inBuilding Operations. Predictive maintenance in commercialbuildings has moved from pilots to… 100% EFFORT MIX Build 32% Integrate 26% Secure 24% Operate 18%
Insights · May 25, 2026

Predictive Maintenance for Commercial Properties: AI in Building Operations

Predictive maintenance in commercial buildings has moved from pilots to production deployments. Three sensor patterns, three model patterns, and three operational patterns produce reliable…

8 min read
TECHNOLOGY Data Engineering forReal Estate Platforms:MLS + IoT + Transactions. Real estate platforms integrate threeprimary data sources with very different… 01 Ad hoc 02 Managed 03 Defined 04 Optimized DATA ENGINEERING
Insights · May 20, 2026

Data Engineering for Real Estate Platforms: MLS + IoT + Transactions

Real estate platforms integrate three primary data sources with very different update patterns and data shapes. The unification work has specific patterns that most platform teams underestimate.…

8 min read
TECHNOLOGY AWS Architecture for AIWorkloads: A Referencefor Enterprise Teams. AI workloads on AWS have settled into arecognizable five-layer reference. Most… 100% EFFORT MIX Planning 32% Delivery 26% Testing 24% Support 18%
Insights · May 19, 2026

AWS Architecture for AI Workloads: A Reference for Enterprise Teams

AI workloads on AWS have settled into a recognizable five-layer reference. Most enterprise teams get one or two layers wrong on first deployment. Here is the reference and the specific mistakes…

7 min read
TECHNOLOGY AWS Migration: ThePragmatic Playbook forMid-Market to Enterprise. Mid-market and enterprise AWS migrationssucceed when scoped as three waves… 100% EFFORT MIX Planning 32% Delivery 26% Testing 24% Support 18%
Insights · May 19, 2026

AWS Migration: The Pragmatic Playbook for Mid-Market to Enterprise

Mid-market and enterprise AWS migrations succeed when scoped as three waves rather than as one big-bang program. Each wave has different goals and different success criteria. Here is the playbook…

7 min read
TECHNOLOGY AWS Observability Stack:CloudWatch, X-Ray,OpenSearch and Beyond. AWS native observability tools eachcover a portion of what production… AWSOBSERVABILITY DO Define ownership earlyMeasure before scalingBuild for observability AVOID Unclear accountabilityPremature optimizationBlack-box systems
Insights · May 19, 2026

AWS Observability Stack: CloudWatch, X-Ray, OpenSearch and Beyond

AWS native observability tools each cover a portion of what production systems need. Three gaps remain where third-party or custom tooling is required. Here is the reference with the gaps explicit.

6 min read
TECHNOLOGY RAG on AWS: A ProductionArchitecture from Ingestto Response. Production-grade RAG on AWS has fivestages from ingest to response. Each… MODEL DEPLOY MONITOR ITERATE RAG
Insights · May 19, 2026

RAG on AWS: A Production Architecture from Ingest to Response

Production-grade RAG on AWS has five stages from ingest to response. Each stage has AWS-native services that fit and ones that do not. Here is the reference architecture with the specific service…

7 min read
TECHNOLOGY AWS FinOps: Buildinga Continuous CostOptimization Loop. One-time AWS cost audits produceone-time savings. Continuous FinOps… 100% EFFORT MIX Planning 32% Delivery 26% Testing 24% Support 18%
Insights · May 19, 2026

AWS FinOps: Building a Continuous Cost Optimization Loop

One-time AWS cost audits produce one-time savings. Continuous FinOps loops produce sustained reduction. A weekly cycle with five steps converts one-time savings into compound improvement. Here is…

7 min read
TECHNOLOGY Step Functions forAgentic AI Workflowson AWS. AWS Step Functions is one of the betterorchestration choices for agentic AI… MODEL DEPLOY MONITOR ITERATE STEP
Insights · May 19, 2026

Step Functions for Agentic AI Workflows on AWS

AWS Step Functions is one of the better orchestration choices for agentic AI workloads, and not the right choice for some others. Three patterns describe when it fits. Here is the operating reference.

6 min read
TECHNOLOGY Data Architecture forAI: What Your StackNeeds Before You AddLLMs. Most AI implementation problems trace todata infrastructure that was not ready… STRATEGY DELIVERY GOVERNANCE SCALE DATAARCHITECTURE
Insights · May 19, 2026

Data Architecture for AI: What Your Stack Needs Before You Add LLMs

Most AI implementation problems trace to data infrastructure that was not ready when AI was added. Five readiness conditions determine whether your stack can support LLMs. Check them before adding…

7 min read
TECHNOLOGY What Is Data Engineeringin 2026? A ModernDefinition forEnterprise Leaders. Learn what Data Engineering means in2026: pipelines, contracts… DATAENGINEERING DO Start from metricsShip incrementallyAutomate the guardrails AVOID Big-bang rolloutsSkipping discoveryManual, ad-hoc checks
Insights · May 19, 2026

What Is Data Engineering in 2026? A Modern Definition for Enterprise Leaders

Learn what Data Engineering means in 2026: pipelines, contracts, observability, and the operating model behind every modern data platform.

11 min read
TECHNOLOGY MicroservicesArchitecture: When ItHelps and When It Hurts. Amazon Prime Video cut 90% offinfrastructure cost going from… DISCOVERY DESIGN DELIVERY SCALE
Insights · May 19, 2026

Microservices Architecture: When It Helps and When It Hurts

Amazon Prime Video cut 90% off infrastructure cost going from microservices back to a monolith. 42% of orgs are doing similar. Here's the decision framework.

5 min read
TECHNOLOGY Engineering CultureBreaks the AI-FirstOrg. AI adoption hit 90% of engineeringteams. But senior engineers see 5x the… DESIGN SHIP OBSERVE REFINE ENGINEERI…
Insights · May 19, 2026

Engineering Culture Breaks the AI-First Org

AI adoption hit 90% of engineering teams. But senior engineers see 5x the productivity gain juniors do. The culture gap is now the biggest org problem CTOs face.

6 min read
TECHNOLOGY AI Audit: DetectingIssues Before VCs FindThem in Due Diligence. 75% of VC deal reviews are nowAI-informed. By the time investors find… 01 Ad hoc 02 Managed 03 Defined 04 Optimized AI AUDIT
Insights · May 19, 2026

AI Audit: Detecting Issues Before VCs Find Them in Due Diligence

75% of VC deal reviews are now AI-informed. By the time investors find your AI issues in due diligence, it's too late to fix the cap table consequences. Here's the audit you run first.

7 min read
TECHNOLOGY AI Cost per Request: AFinOps Framework forEnterprise AI. AI inference spend hit $37B in 2025, up3.2x in a year. The CFO is about to ask… 100% EFFORT MIX Build 32% Integrate 26% Secure 24% Operate 18%
Insights · May 19, 2026

AI Cost per Request: A FinOps Framework for Enterprise AI

AI inference spend hit $37B in 2025, up 3.2x in a year. The CFO is about to ask why. Here's the per-request framework that produces the answer they want.

7 min read
TECHNOLOGY The VC InterviewChecklist: TechnicalQuestions to AnswerBefore the Meeting. 75% of VC deals are AI-informed. 90% ofVCs use AI tools to screen. Here are the… MODEL DEPLOY MONITOR ITERATE VC
Insights · May 19, 2026

The VC Interview Checklist: Technical Questions to Answer Before the Meeting

75% of VC deals are AI-informed. 90% of VCs use AI tools to screen. Here are the 12 technical questions you'll be asked, with the answers that close faster valuations.

7 min read
TECHNOLOGY Continuous Intelligenceand SoftwareReliability: The 67%Silent Failure Problem. MIT found 91% of production AI modelsdrift within a year. 67% fail silently… 4minutes CONTINUOUS INTELLIGEN… People
Insights · May 19, 2026

Continuous Intelligence and Software Reliability: The 67% Silent Failure Problem

MIT found 91% of production AI models drift within a year. 67% fail silently. AWS DevOps Agent now detects regressions in 4 minutes. Here is what reliability means when your software thinks.

7 min read
TECHNOLOGY The New SDLC: AIAgents Build Halfthe Code. GitHub research shows AI now writes 46percent of code in adopted teams. The… DESIGN SHIP OBSERVE REFINE NEW
Insights · May 19, 2026

The New SDLC: AI Agents Build Half the Code

GitHub research shows AI now writes 46 percent of code in adopted teams. The SDLC has reshaped around review, evals, and the 11-week ramp. Here is the new shape and what breaks if you ignore it.

7 min read
TECHNOLOGY AI FinOps: CloudCost Optimizationfor the InferenceEra. GenAI spend hit $37B globally in 2024and inference now dominates AI cost… 100% EFFORT MIX Strategy 32% Engineering 26% Governance 24% Enablement 18%
Insights · May 19, 2026

AI FinOps: Cloud Cost Optimization for the Inference Era

GenAI spend hit $37B globally in 2024 and inference now dominates AI cost lines. Five FinOps levers that actually cut the bill: caching, tier routing, batch shifting, prompt economics, and…

7 min read
TECHNOLOGY Modern DevOps MetricsBeyond DORA: What EliteEngineering Teams Trackin 2026. DORA dropped the elite/high/medium/lowbuckets in 2025. Top teams now track… DISCOVERY DESIGN DELIVERY SCALE
Insights · May 19, 2026

Modern DevOps Metrics Beyond DORA: What Elite Engineering Teams Track in 2026

DORA dropped the elite/high/medium/low buckets in 2025. Top teams now track AI-attribution metrics, developer experience, and business outcome alignment alongside DORA. Here's the new picture.

5 min read
TECHNOLOGY Legacy System Risk inSoftware Delivery: The280,000-Hour Problem. Morgan Stanley logged 280,000 developerhours on legacy migration before AI cut… DESIGN SHIP OBSERVE REFINE LEGACY
Insights · May 19, 2026

Legacy System Risk in Software Delivery: The 280,000-Hour Problem

Morgan Stanley logged 280,000 developer hours on legacy migration before AI cut it in half. Here is what legacy risk actually costs a CTO in 2026 and how to price it.

8 min read
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