Curriculum Vitae - Łukasz Marek Sielski

16+ years commercial experience as a developer. For 6 years lead/manager. Built teams, established processes, created MVPs and stabilised post-prototype/seed products. Contributed to MEANjs, wrote Lackey CMS (ME[v+d]N). Expertise in JavaScript stacks (recently TypeScript, React, Angualr2, Node, Electron, AWS Lambda). Ease adapting new frameworks and technologies. Used to work under pressure and educate business. Delivery and product-oriented first.

Location SW London, United Kingdom.

CTO/VPE approach

I need to first understand problem you try to build solution to. If that's needed roll up sleves and work with other (or as the only) developer(s). Then I help you draw and commit to absolute and achievable MVP.

I build transparent process ensuring lack of distraction. We deliver little, deliver often, measure rather guess. I hire talent and attitude, not years of already obsolete experience. Try to divide concerns to small, easy to manage and delegate parts.

Managing style:

  • Solo or up to 2 reports - lean XP programming with fast iterations just on OODA loops
  • Team up to 5 - lean kanban lead agile with full process
  • Team over 5 - directed opportunism and management by exception

Senior/Lead Developer approach

I follow your style guideline and definition of done. I rise all risks of cutting corners and provide knowns and unknowns. I suggest solution that is suitable to team and organisation, not only to my taste.

References

Rob McCardle
Former CTO of Enigma
In hiring Łukasz at Enigma, I always anticipated he would be an excellent software developer and was never disappointed but what I really admire having worked with him for over a year was the leadership, team-mindedness, enthusiasm, business focus and management ability he brought with him in addition. He is tremendously talented, productive & transparent and I would recommend him as a developer, employee, colleague and as a person.
Nov 2016
Sean Collins
Former CEO of PureHolidayHomes
I first started working with Sielay in 2011 as our software development needs began to scale. We grew from one individual to a team of 10 and remained very happy with the quality of work delivered and the cost savings compared to recruiting and managing a team in the UK. Communication and attention to detail were always of the highest standard and they are highly commercial in their thinking and practise, in particular looking for the most effective solutions to problems not just the east quick win. We were so impressed with the team that we used them to build an outsources customer service team of 4 that substantially improved our capacity and customer satisfaction. I would highly recommend a working partnership with Sielay.
May 2014
Peter Ward
CEO | Co-Founder | Entreprenour | Advisor | Investor
A great innovator and someone who has a passion for what he does. Still young and rough around the edges and sometimes needs to be a bit more focused, but he is working on that I will do my best to help him with that. A lot of potential, if channeled in the right way with great ideas on how to make things cutting edge. A valued member of the team
Nov 2008
Krzysztof Kubanek
Backend Developer as Casamundo
One of the best developers I ever worked with. Wide technology knowledge and a mind always full of ideas how to improve development processes and code quality. Also a man of excellent foreign language skills.
Nov 2013

Work Experience

>Jan 2016 - Dec 2016

Senior Full-stack Developer

Enigma Marketing Services

ResponsibilityLeading team behind main CMS solution and custom features
ManagementTeam of four. Mentoring, architecture, R&D
ExitCMS project delivered for continuous use
Hands on
JavaScript
TypeScript
Angular
Ansible
NodeJS
Mongo
>Oct 2014 - Jan 2016

Ad technologist, Lead Developer

Time Inc. UK

Responsibility as a leadLeading team behind biggest traffic UK title
Responsibility as a ad-techBuilding custom solutions to manage and analyse advertisement across all UK titles
ManagementTeam of four. Mentoring, architecture, R&D
Hands on
JavaScript
Angular
PHP
Symfony
>Oct 2014 - Jan 2016

Systems Architect (Lead Developer)

Apprecie

StartupTrying to connect wealth managers with luxury brands
ResponsibilityNon-executive CTO/VPE. Hands on
ManagementTeam of four. Mentoring, architecture, R&D
Hands on
JavaScript
PHP
Mongo
>May 2011 - Mar 2014

Branch Manager / Lead Developer

PureHolidayHomes

StartupHoliday home rental site
ResponsibilityNon-executive CTO/VPE. Whole non-sale operations. Hands on
ManagementTeam of nine developers, two testers and four customer support. Hiring, mentoring, architecture, R&D, operations, offshore branch management.
ExitCompany acquired by competitor
Hands on
JavaScript
PHP
Mongo
>Apr 2010 - May 2011

Senior Developer

GameFactory / FabrykaGier

ResponsibilityConsulting. Game Development
Hands on
JavaScript
PHP
Mongo
MySQL
ActionScript/Flash
MySQL
>Apr 2009 - Mar 2010

Senior Developer

Nokia Gate 5

ResponsibilityMember of team creating OVI SDK
Hands on
JavaScript
>Nov 2006 - Mar 2009

Software Developer / Architect

WAYN

ResponsibilityMember of team behind multimillion user social network
Hands on
JavaScript
VisualBasic
>May 2001 - Dec 2006

Webmaster

PKS Szczecin

Hands on
PHP
JavaScript
MySQL
>May 2004 - Nov 2005

PHP Developer

Gloport/GigaNet

Hands on
PHP
JavaScript
MySQL

Skills

>Programming Language
JavaScriptVanilla, ES5, ES6, ES7, Browser, Node
TypeScript
PHPNot very exited about it
JavaEarly Android, Eclipse extensions
PythonOnly for tooling, small exposure
RubyOnly for tooling, small exposure
C#
VB.Net
VisualBasic
PLSQL
ActionScript/Flex
>Frameworks / Tools
VanillaJS
ReactJS
ReduxPrefer redux-observable over redux-saga
RxJS
NodeJS
Electron
Express
Angular1 and 2/4
jQuery
MooTools
OVI
Dojo
PrototypeJS
Symfony
Laravel
Codegniter
>Database/Cache/Queue
Mongo
DynamoDB
S3
MySQL
Postgres
OrientDB
Memcache
ElasticSearch
AWS SQS
>CI/Hosting/Layers
Docker
AWS Lambda
AWS CloudFormation
Jenkins
Travis
Behat
Cucumber
Ansible
Jasmine
Mocha
Protractor
NewRelic Synthetics
Istanbul
AWS Cloud
Rackspace
DigialOcean
baremetal
>OS
Ubutnu
*nix
osx
windows
android
ios
>Process/Management/Soft
Team buildingFrom 0 to 10+
Remote team management
Specification
AgileLEAN, Scrum, Kanban
PM toolingJIRA, Trello, BaseCamp, GitHub issues, GitLab isses, Asana
>Language
Polishnative
Englishfluent
Russiancommunicative
Germancommunicative
Ukrainianhearing/reading
Belarusianhearing/reading
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