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https://github.com/igrishaev/cv

My CV
https://github.com/igrishaev/cv

clojure clojurescript cv datomic

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My CV

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## Ivan Grishaev



An IT engineer focused on Python, Clojure & Java.



Tags: Python, Clojure(Script), Java, GraalVM, Postgres, Datomic, AWS Lambda,

Kafka, Python, Emacs, LaTeX.



Armenia, UTC +3



Links:



- [[email protected]](mailto:[email protected])

- [github.com/igrishaev](https://github.com/igrishaev)

- [linkedin.com/in/igrishaev](https://linkedin.com/in/igrishaev)



### Summary



- 8 years of Python: Django & Flask, Fast API, Pytest, Tox;

- 8 years of Clojure: Aleph/Manifold, core.async, Component/Integrant;

- GraalVM + native-image compilation of Java & Clojure projects for AWS Lambda;

- experience with different data sources: PG, Datomic, Kafka, Cassandra, etc.

- some experience with frontend: re-frame, React;

- good with Emacs and LaTeX.



## Mentoring



[hexlet]: https://hexlet.io



I educated a couple of students and helped them graduate and find their first

job. I've been preparing them to the interview. Their diploma projects were

considered the best ones across the course. I teach Egnlish, informally.



In the past, I made Python lessons for the educational platform

[Hexlet.io][hexlet]. Each class consisted of a video course, a quiz and a code

task to complete. The video courses are still available on Youtube.



## Projects & Open source



[etaoin]: https://github.com/igrishaev/etaoin



[clojars]: https://clojars.org/users/igrishaev



I maintain about a dozen of Clojure libraries hosted on Github (see my [Clojars

profile][clojars]). One of them is [Etaoin][etaoin] which is widely used (700

stars, spotted in many companies).



[book-clj-interop]: https://leanpub.com/clojure-java-interop/



I wrote a short book in English about Java interop. [Get in on

Leanpub][book-clj-interop].



[book-clj-prod]: https://grishaev.me/clojure-in-prod/



I wrote a full print book in Russian called ["Clojure in

Production"][book-clj-prod]. The book covers web development, Clojure.spec,

exception handling, systems, testing and other subjects. It is partially

translated to English in my blog.



[book-clj-prod-2]: https://grishaev.me/clojure-in-prod-2/



I wrote the second volume called ["Clojure in Production:

vol. 2"][book-clj-prod-2].



## Experience



### May 2023 — now: Senior Clojure developer @ [Raiffeisen Bank International](https://www.rbinternational.com/en/raiffeisen.html) (Austria)



I maintain a vast risk management system. Clojure, Java, AWS, Lambda, Postgres,

message queues.



### Nov 2022 — Sep 2023: Senior Clojure developer @ [Audience Republic](https://www.audiencerepublic.com/) (Australia)



I'm working on a vast Clojure code base + Postgres. Some of the things I've done

so far:



- introduced Docker & integration tests;

- added linters, improved the CI;

- wrote some internal documentation;

- implemented new business features.



### Feb 2022 — Sep 2022: Senior Clojure developer @ [Clashapp/Huddles](https://huddlesapp.co/) (USA)



I support vast Clojure codebase with plenty of components:



- AWS, Postgres;

- Integration with third-party providers;

- Handling AppStore notifications;

- Massive integration tests.



### Dec 2018 — Feb 2022: Senior Clojure developer @ [Exoscale](https://www.exoscale.com/) (Switzerland)



At Exoscale, I mostly worked on various network orchestrators. We had plenty of

data sources like Mysql, Cassandra, Kafka which required precise control. I used

Aleph & Manifold stack for my apps. I maintained some legacy apps driven with

Core.async.



Exoscale has plenty of internal stuff which I contributed to. One of them is a

web framework named Blueprint built on top of Open-API spec and data schemas.



I made an app to transfer vast files (+100Gb) into our infrastructure.



I integrated the web SSH terminal to the admin page (noVNC, JavaScript, Clojure

on backend).



I made a lot of improvements to the internal billing system written in Python,

Django and Pytest.



I made a draft of the official CLI client for Exoscale API.



[dbaas]: https://www.exoscale.com/dbaas/



During the last year at Exoscale, I worked on [DBaaS][dbaas]: a massive feature

that integrates a third-party database provider into the Exoscale

infrastructure. That involved HTTP API, data processing, reconciliation, billing

processing and more.



### Jan 2018 — Dec 2018: Senior Clojure developer @ [Health Samurai](https://www.health-samurai.io/) (Russia)



[npi]: https://github.com/HealthSamurai/us-npi/

[npi-swagger]: https://npi.health-samurai.io/swagger



Health Samurai is a startup focused on medical data. They develop

FHIR-compatible software, and I was working on several internal services. One of

them named `US NPI` is open source and may be found on [GitHub][npi]. This

service fetches the official US NPI registry and fills the database. It also

provides flexible REST API, search capabilities and [Swagger UI][npi-swagger].



I spent four months working on a mobile app for iOS. The app was driven by

Re-Natal and ClojureScript. We managed to pass Apple's review and had the app

released in App Store.



### 2016 — Dec 2017: Clojure developer @ [Flyerbee](https://www.flyerbee.com/) (Switzerland)



Flyerbee is a web app that automates outdooring advertisements. I worked on both

server and UI parts using a modified version of the Luminus stack. That included

Clojure, Ring, JDBC/PostgreSQL, and Re-frame.



### 2015 — 2016: Python developer @ [SwiftServe](http://www.swiftserve.com/) (UK)



SwiftServe is a worldwide CDN network that competes with AWS CloudFront. I

developed three internal services written in Python and Django and set up

micro-service architecture in AWS cloud. I integrated a modern unit-test

framework into our pipeline and added a new documentation system.



### 2013 — 2015: Python developer @ [Dataart](http://www.dataart.com/)



DataArt is a vast outsourcing company. The main project I've been working on was

a worldwide online game with 70M players. I developed several internal

services, set up message queues and wrote lots of unit tests.



### 2008 — 2013: Various contracting jobs



I've been working on various projects including Python and Delphi. My clients

were mostly individuals and small companies. I developed desktop apps, websites

and simple Android applications.



### Education



Bachelor's Degree at Applied Informatics in Economics, [Chita University of

Economics](http://narhoz-chita.ru/), 2003 -- 2008



### Other



I am a father of three. Enjoy winter activities. Run my [blog][blog] in both

English and Russian.



[blog]: https://grishaev.me