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Location

Poland

Rate

$43  / per hour

Years of experience

10

About

I am a programmer with 10 years of professional experience. I have had an opportunity to work for the leading financial institutions developing tools for investment banking and risk management. I worked with a broad spectrum of technologies although the most experience I gained in the .NET framework. I can work proficiently with Windows, macOS and Unix operating systems. I have experience also in dev ops and gathering business requirements form users. Moreover I have ability to solve non standard problems thinking out of the box. I am looking for a job providing challenging tasks that will help me to develop my skills.

Tech Stack

Data Science, .NET, ASP.NET, Bash, ELM, Knockout.js, Linux, Python, SQL, Swagger, Visual Basic (VB), WPF

Employment history

AI/ML Engineer, Blockhunters 2020/02-Now

Design and development of a symbolic virtual machine for automated software verification. At Blockhunters we develop tools that enable high quality unit and regression tests to be automaticaly generated from raw source code. Our goal is to save programmers’ and testers’ time, which in turn, leads to increased employee productivity and lower costs related to software testing. Tests are generated by analysing program execution paths with a symbolic virtual machine, which is able to find corner cases and obvious errors, and then report them to developers. Thanks to WebAssembly our tool supports most of the popular programming languages and environments. This approach saves a significant amount of the time which would be needed to implement it in different environments

Quant Developer, Margo 2017/08 - 2019/08

Working on market risk management systems for the biggest
European investment bank as a software developer and
quantitative analyst.
My responsibilities:
developing tools for time series generation and
analysis in .NET and Python
writing libraries reused by quants in several projects
implementing risk management systems
requirements due to FRTB regulations
helping model developers with programming and
software deployment
setting up of continuous integration and continuous
deployment solution with TeamCity
calculating periods of stressed VaR with graphical
user interface in Python
creating tools for regression tests and code coverage
ran after each CI build
refactoring software to unit testable architecture
performance optimization and code refactoring
designing and implementing algorithms and data
structures for the best performance
advisory in software architecture and development
process
enforcing polices to increase code quality like
mandatory code reviews
conducting technical interviews of candidates

Software Developer, Onwelo 2016/04 - 2017/05

Developing systems for banking, insurance and telecom
industries in various technologies.
My responsibilities:
creating plugins for client’s apps in .NET and WPF
preparing proof of concept and evaluation of
transactional system for a big corporate bank
creating mobile apps for iOS and Android in Cocoa
and Xamarin
creating web user interfaces in HTML 5 and CSS
managing virtualized environment in Hyper-V and
LXD
designed and coded internal application for testing
candidates in purely functional language Elm
developing of tools for business process automation
performance optimization and code refactoring
preparing presentations and proof of concepts for
clients
designing relational databases with object-relational
mappings
creating REST services in Swagger and OpenAPI
tools
integrating various client systems with web services
loading and migrating data between clients’ systems
preparing offers for clients and gathering their
requirements

Programmer, Deloitte 2015/02 - 2016/04

Development of credit risk management system for a big retail bank. My responsibilities: implementing credit risk system accordingly to Basel III requirements creating web user interfaces in ASP.NET WebForms designing SQL Server databases writing SQL Server functions, views and stored procedures optimizing and analyzing T-SQL queries increasing processing speed with multithreading performance optimization and code refactoring preparing presentations and proof of concepts for clients gathering business requirements

.NET Consultant, 7N 2013/08 - 2015/02

Development of tools for investment banking and forex trading
for mBank.
My responsibilities:
designing effective algorithms and data structures
for storing quotations
creating user interfaces in WinForms and web
technologies
designing SQL server databases
performance optimization and code refactoring
retrieving, transforming and loading data between
systems developed in various technologies
writing bash scripts in Unix (AIX) with awk, sed
and perl
investigating and fixing bugs reported by users
writing unit and regression tests

Senior Consultant, Bank Millennium 2011/12 - 2013/07

Development of web transactional system for corporate clients
My responsibilities:
creating web user interfaces in ASP.NET and
Knockout.js
implementing a service layer for transactional
system
analyzing reported bugs and fixing them
design and implementation of high performance
permissions module
adding new features requested by clients
designing relational databases
analyzing T-SQL query plans
tracing database deadlocks and reducing their
number by 90%
analyzing events from SQL Server event traces
creating and consuming web services

Programmer, Lionbridge 2010/07 - 2011/12

Technical coordination of localization project for Microsoft and
software development for Cisco.
My responsibilities:
designing and implementing web services
analyzing T-SQL query plans
creating web user interfaces in ASP.NET
WebForms
designing relational databases
adding new functionalities to the existing software
analyzing and fixing reported bugs
technical validation of translated resources
writing instructions for translators
process automation with VBA and Python

Tom Potanski

“80+ clients have experienced exceptional results from our IT recruitment and software development services.”

Tom Potanski

Tom Potanski Founding Partner, DevsData

DevsData LLC Reviews 5.0 Rated 5.0 stars
37 reviews
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5.0
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"The agency led the hiring with a dedicated recruitment team. In the end, the client hired two senior technicians, one from Spain and another from Portugal, greatly enriching its engineering team."
Sebastian Abdy Saboune's avatar
Sebastian Abdy Saboune
Cofounder & CPO
Twist Solutions, Ltd.
Verified Review
5.0
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"We consider the developers they recommended exceptionally strong from a technical perspective. I can recommend the services of DevsData to all tech companies in need of exceptional tech talent."
Garik Suess's avatar
Garik Suess
Cofounder & CTO
Qualifyze GmbH
Verified Review
5.0
United States flag
"It was a pleasure to work with DevsData. They excelled at commitment, communication skills, and time and team management. They were extremely organized and efficient, and they tackled every part of the project (several projects) with the utmost care."
Steven Haley's avatar
Steven Haley
Managing Director
Kroll, Inc.
Verified Review
5.0
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"DevsData reached out to us, as we've been looking to grow our engineering team in Europe and Poland. Communicating efficiently and professionally, DevsData made a strong impression with their understanding of the recruitment challenges we were facing."
Karim Butt's avatar
Karim Butt
Cofounder & CTO
GlossGenius, Inc.
Verified Review
5.0
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"I really appreciate their ability to adapt to our preferred ways of working, agility and successful delivery."
Tom McGovern's avatar
Tom McGovern
Managing Director
Idealab, Inc.
Verified Review
5.0
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"They have really proved their worth and have shown me that my company’s money is really well spent."
Matthew Wiklo's avatar
Matthew Wiklo
CEO
Epinote
Verified Review
5.0
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"I've been working on several IT projects with DevsData for more than five years. There were many software projects they completed for us."
Christopher Ting's avatar
Christopher Ting
Senior IT Manager
Verus Analytics LLC
Verified Review
5.0
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"From beginning to end, the cooperation was smooth and contact with DevsData representatives was very easy."
Patrick Lobocki's avatar
Patrick Lobocki
CEO
Roesier, Inc.
Verified Review
5.0
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"From beginning to end, my experience with DevsData was only positive."
Daniel Goebel's avatar
Daniel Goebel
CEO
CoCoHub, Ltd.
Verified Review
5.0
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"Quality control is rare in this line of business, I think this is the secret sauce of their exceptional quality."
Paul Polewicz's avatar
Paul Polewicz
CEO
Reef Technologies
Verified Review
5.0
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"This rapid pace and immaculate organization are what stood out to me most about DevsData."
Joanna Szymanski's avatar
Joanna Szymanski
Owner & CEO
Xino Sports LLC
Verified Review
5.0
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"We at Flowr Agency are particularly pleased with the outcomes, notably the superior code quality, speed, and communication. It confidently endorses the agency's services to other marketing firms."
Loic Moncany's avatar
Loic Moncany
Cofounder
Flowr Agency
Verified Review
5.0
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"We felt good about our collaboration. They were good people to work with, full of energy, creative, and proactive."
Christian Cieslak's avatar
Christian Cieslak
CEO
Remarkable Ones
Verified Review
5.0
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"We also recommended DevsData to my business connections as they did a truly fantastic job."
Matthew Lenicki's avatar
Matthew Lenicki
CEO
WebCrafters, Inc.
Verified Review
5.0
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"For DevsData to find four amazing developers so fast - that cannot be just luck."
Adam Zaczek's avatar
Adam Zaczek
Founder
1Security
Verified Review
5.0
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"Our cooperation has been very efficient, and I love it."
Adam Janczewski's avatar
Adam Janczewski
Founder & CEO
Jutro Medical
Verified Review
5.0
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"Tom and his team showed great dedication to us as client and allowed wellbee to launch an Alpha stage of our online therapy product in under 1 month from absolute scratch. I need to congratulate them on the very good UX and UI design and good communication skills of the whole team."
Paul Chrzan's avatar
Paul Chrzan
Cofounder and CEO
Wellbee
Verified Review
5.0
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"Out of all the vendors we work with, DevsData clearly stands out. The quality of developers they deliver is beyond what we've received from any other vendor, and they've been able to send profile recommendations very quickly. I'm happy to be their reference for other companies from Israel and talk about their recruitment abilities and what they delivered for us - we eventually signed over 19 engineers from DevsData. I'm extremely satisfied with this recruitment process."
Ran Eyal's avatar
Ran Eyal
Program Manager
ZIM
Verified Review
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Best back-end engineers I've ever worked with.

“I interviewed about a dozen different firms. DevsData LLC is truly exceptional – their backend developers are some of the best I’ve ever worked with. I’ve worked with a lot of very well-qualified developers, locally in San Francisco, and remotely, so that is not a compliment I offer lightly. I appreciate their depth of knowledge and their ability to get things done quickly.”

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Nicholas Johnson

CEO of Orange Charger LLC,

Ex-Tesla Engineer,

Mentor at YCombinator

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Tailored recruitment process, trusted market expertise.

“DevsData reached out to us, as we’ve been looking to grow our engineering team in Europe and Poland. Communicating efficiently and professionally, DevsData made a strong impression with their understanding of the recruitment challenges we were facing. They designed a tailored recruitment process for our needs. I was impressed with the technical depth of their approach.”

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Karim Butt

Co-Founder & CTO at GlossGenius, Inc.

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Outstanding vendor, 21 engineers hired.

“Out of all the vendors we work with, DevsData clearly stands out. The quality of developers they deliver is beyond what we've received from any other vendor, and they've been able to send profile recommendations very quickly. I'm happy to be their reference for other companies from Israel and talk about their recruitment abilities and what they delivered for us.”

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Ran Eyal

Senior Manager at

ZIM Integrated

Shipping Services Ltd.

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Proactive partner, exceptional results.

“DevsData demonstrated a strong degree of proactivity, taking time to thoroughly understand the problem and business perspective, and continuously suggesting performance and usability enhancements. Their app exceeded my expectations. I've worked with DevsData on numerous projects over the last 3 years and I'm very happy. Being both responsive and honest in communication.”

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Jonas Lee

Partner & Executive VP of Verus,

Financial LLC, Investor,

& Serial Entrepreneur

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