···

       
18
       
18
       
 
       


     

       
19
       
19
       
 
       
## Experience

     

       
20
       
20
       
 
       


     

       
21
       
21
       
-
       
- Prograils - Junior Developer - 2013

     

       
22
       
22
       
-
       
- Nukomeet - Full-stack Developer - 2015-2016

     

       
21
       
21
       
+
       
- Hauleth.dev - Consultant - 2021+

     

       
22
       
22
       
+
       
    + Erlang Solutions/Kloeckner GmbH - 2021 - Consultant for Elixir, Ruby, and SQL (PostgreSQL)

     

       
23
       
23
       
+
       
        * Substantial query performance optimisations by optimising PostgreSQL indices

     

       
24
       
24
       
+
       
    + Eiger - 2022-2023

     

       
25
       
25
       
+
       
        * Forte.io

     

       
26
       
26
       
+
       
            - Implementation of the Interledger protocol for cross-chain transactions

     

       
27
       
27
       
+
       
        * Aleo Blokchain

     

       
28
       
28
       
+
       
            - Implementation of the GraphQL API for the on-chain data

     

       
29
       
29
       
+
       
    + Supabase - 2023-current

     

       
30
       
30
       
+
       
        * Logflare - logs aggregation service

     

       
31
       
31
       
+
       
        * Supavisor - a cloud-native, multi-tenant Postgres connection pooler

     

       
32
       
32
       
+
       
- Remote Inc. - Senior Backend Engineer - 2020-2021

     

       
33
       
33
       
+
       
- Kobil GmbH - Erlang/Elixir Developer - 2019-2020

     

       
34
       
34
       
+
       
    + Maintaining MongoDB driver for Elixir

     

       
35
       
35
       
+
       
    + Implemented transactions for MongoDB driver in Elixir

     

       
23
       
36
       
 
       
- AppUnite - Full-stack Developer/DevOps - 2016-2019:

     

       
24
       
37
       
 
       
    + JaFolders/AlleFolders

     

       
25
       
38
       
 
       
        * 2x performance improvement by optimising PostgreSQL usage

     
···

       
31
       
44
       
 
       
        Phoenix/PostgreSQL

     

       
32
       
45
       
 
       
        * Preparing hybrid deployment with on-premise/in-cloud system

     

       
33
       
46
       
 
       
        * Migration of the existing deployments from MongoDB to PostgreSQL

     

       
34
       
34
       
-
       
- Kobil GmbH - Erlang/Elixir Developer - 2019-2020

     

       
35
       
35
       
-
       
    + Maintaining MongoDB driver for Elixir

     

       
36
       
36
       
-
       
    + Implemented transactions for MongoDB driver in Elixir

     

       
37
       
37
       
-
       
- Remote Inc. - Senior Backend Engineer - 2020-2021

     

       
38
       
38
       
-
       
- Hauleth.dev - Consultant - 2021+

     

       
39
       
39
       
-
       
    + Erlang Solutions/Kloeckner GmbH - 2021 - Consultant for Elixir, Ruby, and SQL (PostgreSQL)

     

       
40
       
40
       
-
       
        * Substantial query performance optimisations by optimising PostgreSQL indices

     

       
41
       
41
       
-
       
- Eiger - Senior Backend Engineer - 2022-2023

     

       
42
       
42
       
-
       
    + Forte.io

     

       
43
       
43
       
-
       
        - Implementation of the Interledger protocol for cross-chain transactions

     

       
44
       
44
       
-
       
    + Aleo Blokchain

     

       
45
       
45
       
-
       
        - Implementation of the GraphQL API for the on-chain data

     

       
47
       
47
       
+
       
- Nukomeet - Full-stack Developer - 2015-2016

     

       
48
       
48
       
+
       
- Prograils - Junior Developer - 2013

     

       
46
       
49
       
 
       


     

       
47
       
50
       
 
       
### Organisations

     

       
48
       
51
       
 
       


     
···

       
57
       
60
       
 
       
        * Organizer - 2015

     

       
58
       
61
       
 
       
    + UEFA Championship 2012 - Poland-Ukraine

     

       
59
       
62
       
 
       
        * ICT Accreditation support

     

       
63
       
63
       
+
       
- Times Person of the Year - 2006

     

       
60
       
64
       
 
       


     

       
61
       
65
       
 
       
### Languages

     

       
62
       
66
       
 
       


     
···

       
78
       
82
       
 
       
    + `is_struct/1`

     

       
79
       
83
       
 
       
    + Fixing module inspection on case-insensitive file systems

     

       
80
       
84
       
 
       
    + Support for parsing extra arguments via `mix eval` and `eval` command in

     

       
81
       
81
       
-
       
    release

     

       
85
       
85
       
+
       
      release

     

       
82
       
86
       
 
       
- Erlang OTP:

     

       
83
       
87
       
 
       
    + Support for custom devices in `logger_std_h`

     

       
84
       
88
       
 
       
    + Fixing `socket` module to support broader set of protocols (for example

     
···

       
111
       
115
       
 
       
    + <https://gitlab.com/hauleth/qfx.vim> - display signs next to QF matches

     

       
112
       
116
       
 
       


     

       
113
       
117
       
 
       
### Languages and Frameworks

     

       
114
       
114
       
-
       


     

       
115
       
115
       
-
       
Expert:

     

       
116
       
118
       
 
       


     

       
117
       
119
       
 
       
- Elixir

     

       
118
       
120
       
 
       
    + Phoenix

     
···

       
121
       
123
       
 
       
    + OpenTelemetry collaborator

     

       
122
       
124
       
 
       
    + EEF Member

     

       
123
       
125
       
 
       
    + OTP contributor

     

       
124
       
124
       
-
       


     

       
125
       
125
       
-
       
Advanced:

     

       
126
       
126
       
-
       


     

       
127
       
126
       
 
       
- Rust

     

       
128
       
127
       
 
       
- C

     

       
129
       
128
       
 
       
- PostgreSQL

     

       
130
       
129
       
 
       
- sh/Bash

     

       
131
       
130
       
 
       
- Ruby

     

       
132
       
131
       
 
       
    + Ruby on Rails

     

       
133
       
133
       
-
       


     

       
134
       
134
       
-
       
Fluent:

     

       
135
       
135
       
-
       


     

       
136
       
132
       
 
       
- C++

     

       
137
       
133
       
 
       
- JavaScript

     

       
138
       
134
       
 
       


     

       
139
       
135
       
 
       
### Technologies

     

       
140
       
136
       
 
       


     

       
141
       
141
       
-
       
Expert:

     

       
142
       
142
       
-
       


     

       
143
       
137
       
 
       
- Git

     

       
144
       
138
       
 
       
- Vim

     

       
145
       
145
       
-
       


     

       
146
       
146
       
-
       
Advanced:

     

       
147
       
147
       
-
       


     

       
148
       
139
       
 
       
- HashiStack

     

       
149
       
140
       
 
       
    + Terraform

     

       
150
       
141
       
 
       
    + Consul