andrei — -zsh — 40x3

We ask "why?" because software is just a means to an end to us, not a goal in itself.

We are a product-led software consulting company with a strong background in bootstrapping greenfield products and development environments, often in the public cloud but not limited to it.

We believe tech products and services should focus on the customer and market value, not on the tech stack. We use time-tested and simple best practices so that your team can have a stronger and more agile product management.

ex Klarna Cisco Tobii

mejla@ysoftware.se Book a meeting

Y Software AB 559342-8674
Saltsjöbaden, Nacka
Godkänd för F-skatt

Platform

CI/CD.
GitOps (DevOps).
Self-service.
Infrastructure as Code.
Uniform Patterns.
Secrets Management.
Monitoring.
Observability.

HTTP/REST API

Design.
Documentation.
Security.
Integration.
Implementation.
Management.
Strategy.

JavaScript &co

Core.
NodeJS, TypeScript, Babel, ...
Servers, API, HTTP, REST, hypermedia, RPC, WebSockets, WebRTC, ...
Web Extensions, Native Messaging.
Desktop Apps via Electron.
Native Bindings.

CI/CD

Merge Requests Automation.
Deterministic Builds.
Sandboxed Deployments.
Artifacts Management.
Reliable, Reproduceable, Reusable, Fast.
AppVeyor, Circle CI, Cirrus CI, Codeship, Github Actions, Gitlab CI, Jenkins, Semaphore, Sourcehut, TeamCity, Travis CI, ...

Cloud

Amazon Web Services.
Cloud-Native Architecture.
Account Hierarchy.
Infrastructure as Code.
Identity and Access Management.
Serverless.
Event-Driven.
Monitoring.
Observability.

Misc.

Cross-Platform, Darwin, Linux, Windows/WSL, Docker
Finite State Machines.
Grammars.
GDPR.
Erlang.

Open-Source Software

Know Your HTTP Well

HTTP headers, media-types, methods, relations and status codes, all summarized and linking to their specification.

HTTP Decision Diagram

An activity diagram to describe the resolution of HTTP response status codes, given various headers.

yplatform

Software and configuration that supports various cycles of software development.

KATT

KATT (Klarna API Testing Tool) is an HTTP-based API testing tool for Erlang.

JeSSE

jesse (JSon Schema Erlang) is an implementation of a JSON Schema validator for Erlang.

http-lambda

Write AWS Lambdas the same way as with a local server.

core-pegjs

A collection of core PEGjs grammars (IETF, ISO, etc.)

api-pegjs

A collection of PEG parsers for HTTP, API and related syntaxes.

npm-publish-git

Publish your NPM package as a (versioned) git tag.

Simplicity is the final achievement.
After one has played a vast quantity of notes and more notes,
it is simplicity that emerges as the crowning reward of art.

Frédéric Chopin as quoted in If Not God, Then What? (2007) by Joshua Fost, p. 93

20+ years

of professional experience
in software engineering
and leadership in tech

curriculum vitae

polyglot tech

top 10

most active GitHub users in Sweden

5000+ GitHub stars
100+ OSS repositories

ex Klarna

fintech

Prototyping Klarna's Checkout with a Finite State Machine.
Developing Klarna's Checkout frontend.
Designing Klarna's Checkout REST API.
Designing Klarna's Backoffice REST API.
Modeling Klarna's business objects.

Klarna Checkout.
Prototyping.
Finite State Machines.
Frontend engineering.
REST API design.
Object modeling.

ex Cisco

networking

Managed the Erlang JSON-RPC API for ConfD and NSO (Network Services Orchestrator).
Migrated cross-platform projects and teams from SVN to Git (Atlassian Bitbucket).
Migrated cross-platform projects and teams to Jenkins CI.

ConfD and NSO.
Erlang.
JSON-RPC API.
Cross-platform.
VCS migration.
CI migration.

ex Tobii

adtech & eyetracking

Growing Tobii Pro's Cloud Services team.
Designed an agnostic local development platform and build/test/deploy pipeline for multiple projects.
Developed an agnostic local development platform and build/test/deploy pipeline for multiple projects.
Developed the Data Warehouse, Analytics, Backend, Frontend and Web Extension for Tobii Pro Pulse.

Team/tech lead.
Platform engineering.
Cloud-native engineering.
Cross-platform.
Data Warehousing/GDPR.
Full-stack engineering.

Erik Alsmyr / CTO at Lexplore

Erik managed Andrei directly

I had the pleasure of working along side Andrei at Tobii Pro for almost 4 years. He joined my nascent department as we were getting started on building products on AWS and very quickly proved himself to be very fast learner, excellent solver of problems but also a super good team member from the perspective of improving others' skills. Many were new to web development in general and cloud infrastrucure in particular but together we grew our craftmanship as a team alot thanks to Andrei's ability to bring others along on the learning curve.

Over the years Andrei earned everyone's utmost respect as we grew into a 3 teams strong organization basing our development on the same platform but for quite different products. Andrei was instrumental is establishing our use of AWS, our Devops culture and our solutions to CI and CD based on Travis CI and Cloud Formation.

As we part ways now in the winter of 2020 I wish Andrei all the best and I am certain he will be wildly successful wherever he puts his attention. I truly hope our paths cross again in the future work wise. I am sure they will over a glass of fine, japanese whiskey at some nice place.

Ian Savchenko / Developer at PayPal

Ian worked with Andrei on the same team

Without any hesitations, Andrei is the best Software Engineer I've ever got a chance to work with.

He has a vast experience in everything related to Computer Science and he knows his way around almost everything when it comes to Web and Cloud development. Thinking often several steps ahead, he identifies problems and comes up with solutions that are robust and simple at the same time.

Andrei is a fast learner and worker and you can be surprised by his work pace. But you would be even more surprised by the fact that every decision Andrei takes about system design, code styling or testing have a reason behind them and are usually carefully thought through, even though they may be looking hasty. Question him about them and you won't be disappointed by his reasoned answers.

Andrei is always on the edge of the best practices and techniques and his proficiency in development tooling allows him to automate many routines in his personal and team's workflow.

The last but not the least, Andrei is a caring person and a great teammate who takes care about coworkers, their productivity and well-being.

Isak Bakken / Software Engineer at Spotify

Isak worked with Andrei on the same team

Andrei is a highly productive developer, with skills in many different fields and programming languages. He was shown an unusually large ability and drive to quickly learn new programming languages and technologies. He has a very analytic and focused mindset and is skilled at reasoning about technical problems or solutions. Having Andrei in our team was very valuable, especially when new solutions to difficult problems were discussed, prototyped and implemented.

He has an impressive ability to quickly comprehend a complex problem after just a short chat about it. Often I just mentioned a few keywords and he gladly helped me solve difficult problems with even less communication effort than it would have been to write a ticket about the bug or problem.

Most of the time he has been a few months before the rest of us when it comes to foreseeing technical problems with a design, and sometimes a few years (like when it comes to designing future-proof API:s etc.)

Y is pronounced "why" in English.

Y is the Greek I.

Y is the penultimate letter in Latin alphabet, initially used to spell foreign words.

Y stands for yotta, the largest decimal unit prefix in the metric system, denoting a factor of 10^24.

Y in American Sign Language is similar to the shaka sign, also known as "hang loose".

Y purple is purposefully rebeccapurple.