Einar W. Høst
where else to find them
website:https://einarwh.no/
github:einarwh
bluesky:einarwh.bsky.social
x:einarwh
linkedin:einarwh
speakerdeck:einarwh
what they talk about
all 17 in the filters
where they keep going back
- NDC Oslo9 editions2017–2025
- Øredev2 editions2019–2022
- DDD Europe2 editions2020–2022
all 15 in the filters
on a stage with
who talks about the same things
- Kevlin Henney95 talks
- Jessica Kerr44 talks
- Dave Thomas33 talks
- Dylan Beattie81 talks
- Aja Hammerly31 talks
- Michael Feathers23 talks
| title | conference | date |
|---|---|---|
| The AI puppet dance | NDC Copenhagen 2026 | 2026-06-01 |
Argues that the current generative AI wave is driven by marketing narratives — train leaving the station, revolution — not demonstrated returns, and that large… | ||
| The AI puppet dance | NDC AI 2025 | 2025-11-11 |
Argues that current generative AI hype creates a performative AI puppet dance rather than careful judgment, citing concrete examples: 30% more submissions to a… | ||
| Tech debt nomads and slash-and-burn development | NDC Oslo 2025 | 2025-05-19 |
Argues that a recurring slash-and-burn loop sees a new tech lead perform a token rewrite, spend a few months rebuilding a subsystem, then leave, causing a… | ||
| Agile and Architecture: a meeting of the undead | Devoxx UK 2025 | 2025-05-07 |
Argues that architecture and Agile survive as hollow rituals but the real problem is change over time: code is inert and teams must constantly patch a stream… | ||
| Why your AI generated talk abstract was rejected for NDC Oslo | NDC Oslo 2024 | 2024-06-10 |
NDC Oslo gets ~2,000 submissions (1,700 regular) for ~100 slots, yielding a 6.6% acceptance rate. Reviewers skim abstracts in about 30 seconds, comparing three… | ||
| Agile and Architecture: a meeting of the undead | NDC Oslo 2024 | 2024-06-10 |
Declares architecture murdered by Agile in 2001 and shows how Scrum creates a protective terrarium that isolates teams while management gets monthly direction… | ||
| Agile and Architecture: a meeting of the undead | Craft Conference 2024 | 2024-05-30 |
Argues that architecture was sidelined by Agile (notably after 2001) and that Agile hardened into the terrarium model where Scrum + Jira create insulated… | ||
| Agile and Architecture: a meeting of the undead | Agile meets Architecture Berlin 2023 | 2023-10-05 |
Argues that architecture was “murdered” by Agile and Agile in turn becomes ritualized, then diagnoses the real, persistent problem as change over time: code is… | ||
| Modelling vs Reality | Copenhagen Developers Festival 2023 | 2023-08-28 |
Argues that everyday categories and precise models systematically diverge: cognition uses prototype vs classical models and basic-level categories, producing… | ||
| Modelling vs Reality | NDC Oslo 2023 | 2023-05-22 |
Argues that ordinary categories fail under scrutiny and that deliberate modelling trades ambiguity for brittle precision: experimental work (Eleanor rosh)… | ||
| Hypermedia actors in F# | Øredev 2022 | 2022-11-08 |
Claim: combine actors, finite state machines and hypermedia to make "living" web resources. Implementation uses F-sharp agents on asp.net core with giraffe… | ||
| The socio technical developer | Øredev 2022 | 2022-11-08 |
The core claim is that software is a socio-technical system: organizational incentives, law and financing shape code and are reinforced by it, illustrated by… | ||
| We must talk about String | NDC Oslo 2022 | 2022-09-26 |
Most code treats string as an all‑accepting type so unexpected values slip through; claim is that using the type system to tag domain strings and enforce… | ||
| How I work with JSON | NDC Oslo 2022 | 2022-09-26 |
Argues that JSON itself is simple and the hard part is mapping to domain models, so prefer JSON DTOs (typed property bags using only JSON-native types and… | ||
| Categorisation, Comparison and Cases | DDD Europe 2022 | 2022-06-20 |
Argues the common folk theory of categories is wrong and replaces crisp sets with prototype membership and gradients, shows experiments where robins are… | ||
| Building Reliable Services at NRK TV | NDC Oslo 2021 | 2021-11-29 |
NRK TV serves ~500k users daily and defines reliability with concrete SLOs (example: 99.95% uptime → 4 minutes downtime/week) and per-minute SLI measurements… | ||
| Death of a Craftsman: A software developer identity crisis | NDC Oslo 2020 | 2020-06-08 |
Argues that the craftsman identity—centered on TDD and SOLID mastery and a moral split of programmers into the unwashed masses, the virtuous craftsman, and… | ||
| Evolving architecture with DDD and hypermedia - | DDD Europe 2020 | 2020-02-06 |
NRK TV moves from a monolith to bounded contexts using an API gateway (Varnish, nginx) and the Strangler pattern, adding HAL links so clients navigate between… | ||
| Escher in Elm: Picture combinators and recursive fish | Øredev 2019 | 2019-11-06 |
Recreates Escher’s Square Limit by implementing Henderson’s 1982 picture algebra in Elm, defining concrete primitives like turn, flip and toss and combinators… | ||
| Composition by Juxtaposition: A PostScript on Functional Geometry | ScalaIO 2019 | 2019-10-29 |
Claims that Henderson's functional-combinator picture algebra maps cleanly to a concatenative language, implemented here in PostScript concatenative… | ||
| Real world hypermedia at NRK TV | NDC Oslo 2019 | 2019-06-17 |
NRK TV switches from a big monolith to linked bounded contexts using HAL links and an nginx gateway, keeping half a million daily users online while deleting… | ||
| Picture combinators and recursive fish | Oslo Elm Day 2019 | 2019-02-16 |
Live coding recreation of Escher's Square Limit using Elm and SVG reproduces Henderson 1982's functional geometry by treating a picture = box -> rendering… | ||
| A PostScript to functional geometry | Code Mesh LDN 2018 | 2018-11-08 |
Implements Henderson 1982 Functional Geometry inside PostScript by encoding pictures as functions from a box to drawing commands and using executable arrays to… | ||
| Technical debt isn't technical | NDC Oslo 2018 | 2018-06-11 |
Claim: most “technical debt” is not poor coding but weak abstractions born from incomplete domain modeling, worsened by organizational inertia and broken… | ||
| Picture combinators and recursive fish | Lambda Days 2018 | 2018-02-22 |
Implements Henderson’s functional-geometry combinators as F# live coding using the SAFE stack and SVG rendering, defining pictures as box→rendering functions… | ||
| Functional geometry: picture combinators and recursive fish | Build Stuff 2017 | 2017-11-15 |
Implements Henderson’s 2002 “functional geometry” approach in F# with Fable, treating pictures-as-functions and composing them with four basic transforms… | ||
| Infinite Lambda Calculus | Code Mesh 2017 | 2017-11-08 |
Demonstrates that self-reproduction in the pure lambda calculus supplies general recursion where names and self‑reference are forbidden, implements a Y… | ||
| Live Lambda Calculus | NDC Oslo 2017 | 2017-06-14 |
Implements a lambda‑calculus interpreter from scratch in F# and fparsec, parsing into an AST, writing an unparser, and reducing via a substitution-based… | ||
| Practical Lambda Calculus | Lambda Days 2017 | 2017-02-09 |
Live coding shows a small lambda interpreter running inside Emacs and builds booleans numbers and lists from raw lambda forms, implements successor predecessor… | ||
| Practical Lambda Calculus | Code Mesh 2015 | 2015-11-03 |
Builds actual Church numerals and implements successor, addition, multiplication and a predecessor via pairs that counts down; constructs lists… | ||
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