Michal Chaniewski, Developer in Sevenoaks, United Kingdom
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Michal Chaniewski

Verified Expert  in Engineering

SOLID Principles Developer

Sevenoaks, United Kingdom
Toptal Member Since
April 5, 2017

Michal has been developing applications on the .NET platform since its first beta release in late 2000. He is a versatile full-stack developer who's capable of delivering great results from the web and desktop, the front-end and back-end services, to the application architecture arena. He is loved by his clients for his unrelenting drive to deliver business value and for helping them grow through the innovative use of technology.


Red Deer Systems
Amazon Web Services (AWS), Microsoft SQL Server, Angular, C#
Shawbrook Bank
Windows Presentation Foundation (WPF), Knockout (Knockout.js), AngularJS...
Argus Media
Amazon Web Services (AWS), Web API, HTML5, Oracle, PubNub, Adobe AIR...




Preferred Environment

Windows, Git, Visual Studio

The most amazing...

...thing I've built is a market-leading secured lending platform that brought in £2B of new business, received many industry awards, and is loved by all users.

Work Experience

Senior Software Developer

2017 - 2017
Red Deer Systems
  • Supported a rich knowledge management-and-research application for investment fund managers using C#, Angular, and SQL Server (running on an AWS platform).
  • Developed a new product offering for regulatory MiFID II compliance.
  • Created a proof-of-concept application for managing contractual relationships between buy- and sell-side of the investment research.
Technologies: Amazon Web Services (AWS), Microsoft SQL Server, Angular, C#

Senior Full-Stack Developer (Contract-Based with Seven Extensions)

2013 - 2017
Shawbrook Bank
  • Created a comprehensive secured lending platform using WCF, ASP.NET MVC, WPF, and SQL Server that generated £2B in new business in just two years and received many industry awards.
  • Integrated successfully a credit search, land registry, property valuation service, bank check, and e-signature—it provided a seamless mortgage application and underwriting experience.
  • Exposed the origination part of the platform through a REST API for the broker partners to use and integrate into their solutions.
  • Built a universal WPF application host; including a flexible workflow framework that is currently being implemented as a base platform for all internal applications in the bank.
  • Worked as a key member of the team in areas such as application performance, security, and microservices architecture.
Technologies: Windows Presentation Foundation (WPF), Knockout (Knockout.js), AngularJS, Windows Communication Framework (WCF), Web API, ASP.NET MVC, C#

Senior Software Developer (Contract-Based)

2013 - 2013
Argus Media
  • Created an enterprise search engine—bringing together data from many separate silos (using Amazon CloudSearch). Built indexers, a search website, and a search API that could be used in other applications across the company.
  • Built a subscription-based real-time alert distribution service—together with desktop and mobile client applications—allowing the company to deliver instant notifications to its customers. Used AWS as a base platform, PubNub as a real-time backbone, and Adobe Air as a client-side technology.
  • Defined a high-availability infrastructure for the alert delivery service.
  • Built a framework for the alert distribution service client applications, that allowed for maximum code reuse and easy development of new features across all supported platforms (Windows and Mac desktops, iOS, Android).
Technologies: Amazon Web Services (AWS), Web API, HTML5, Oracle, PubNub, Adobe AIR, JavaScript, Amazon DynamoDB, Amazon CloudSearch, C#

Senior Software Developer (Contract-Based)

2012 - 2013
  • Played a lead role in the transition from sales-oriented company into a product-oriented one. Designed, architected, and built the Concep Platform—a baseline set of services and infrastructure for all new and planned SaaS offerings.
  • Built the first SaaS application running on the Concep Platform, called simply ALERTS—an automated content subscription and delivery system which facilitated a deep integration with the CMS systems of our clients, and personalized the delivery of updates to their customers. This application has been initially marketed to the legal services providers.
  • Built a set of Web APIs, administration websites (using Bootstrap and Knockout.js), database schema, communication channels, and integration points—in order to facilitate the management and rapid development of planned SaaS applications.
  • Built and led the complete development team—including recruiting, mentoring, defining best practices, introducing SCRUM development framework, and an active role in requirements gathering from the business.
Technologies: Knockout (Knockout.js), NHibernate, Web API, Microsoft SQL Server, ASP.NET MVC, C#

Software Consultant

2011 - 2012
Infusion Technologies
  • Supported and extended CRO Titan—a strategic risk management system—used to calculate risk metrics for all trades and feed them to downstream systems at Credit Suisse investment bank.
  • Extended and ultimately created a new version of Trade Service—a core component—used to fetch, correlate and enrich data from various information silos within the bank.
  • Took part in a greenfield project with a goal to create a new distributed computing and caching platform to serve future expansions of the CRO Titan.
  • Worked on the business-as-usual task related to improving and supporting CRO Titan.
  • Worked, at Infusion Technologies, on an R&D project on the application of Microsoft Surface Hub (then: Microsoft Surface 2) and Kinect device in a business environment and as a way to engage customers in a retail space.
Technologies: Distributed Caches, Oracle, Distributed Systems, Windows Communication Framework (WCF), C#, .NET

Software Developer

2010 - 2011
Freelance Work
  • Built a back-end for a website feedback analytics solution (http://webreep.com/).
  • Created an automatic data acquisition module for a lab management and archiving startup (http://labarchives.com/).
  • Built a complete software application for quality audits and analysis for a large retail network (Intermarche Poland).
Technologies: Microsoft SQL Server, JavaScript, Model View Controller (MVC), ASP.NET, C#, .NET

Software Architect (Contract-Based)

2009 - 2010
  • Architected and developed a greenfield release of a SaaS email marketing automation system for a stealth-mode startup. Built a distributed, scalable architecture capable of sending millions of personalized, dynamic newsletters per day.
  • Developed a market-leading recipient segmentation rule engine that combined data about recipients' demographics with past interactions analytics to deliver highly relevant and personalized content.
  • Built a suite of APIs to be used by ExpertSender's customers.
  • Trained and mentored a team of developers, most of whom didn't have relevant experience on the selected technology stack.
Technologies: SQL Server Analysis Services (SSAS), Microsoft SQL Server, StructureMap, NHibernate, MSMQ, C#, ASP.NET MVC

Senior Developer

2008 - 2009
  • Architected and led the development of a SaaS platform for managing events and conferences.
  • Drove the early adoption effort of ASP.NET MVC across the company. Took part in the architecture group meetings about this new technology and helped to develop best practices and guidelines.
  • Worked on an early-stage proof-of-concept piece of work for a large shipping insurer that involved designing business workflows and integrating them within a SharePoint site.
Technologies: SharePoint, K2 Blackpearl, Microsoft SQL Server, C#, ASP.NET MVC

Software Developer

2005 - 2008
Freelance Work
  • Architected and developed a point-of-sale application for a network of petrol stations. The application included modules for interfacing with various fuel pumps, pricing pylons, sales module, inventory module, and a data sync offline process for exchanging data with the head office.
  • Worked on a web-based CRM built specifically for the shipowners industry. My efforts were mostly related to resolving performance issues the original team run into and to creating an offline capability for the application.
  • Developed 4 starter-kit applications for Microsoft Poland with the goal to showcase and promote ASP.NET technology throughout the enthusiasts market.
  • Created the initial software designs and jump-started the development of a payroll system project for a customer owning a network of restaurants in USA. After the initial phase, the project has been handed over to an offshore team which I supervised through the transition phase.
Technologies: Castle Windsor, Web Services, Windows Forms (WinForms), NHibernate, Microsoft SQL Server, C#, .NET

Software Developer

2005 - 2005
  • Helped to build a high performance engine for the data integration, processing, and distribution to the company's customers through packaged time series subscriptions.
  • Created from scratch a distributed and queryable cache engine—capable of serving hundreds of gigabytes of data from memory while seamlessly ingesting several millions of data points per day with near real-time availability.
  • Helped to build a data engine which was one of the main selling points for the company's appeal (eventually acquired by Thomson Reuters) and has been further developed by the new owner's in-house team.
Technologies: Microsoft SQL Server, MSMQ, Web Services, C#

Senior Software Developer

2004 - 2005
Prokom Software
  • Conducted R&D work related to evaluation and assessment of various workflow and data integration products.
  • Worked on a customer management project for a customer in energy industry built using SAP Web Dynpro.
Technologies: ABAP, SAP Web Dynpro, Java

Software Developer

2001 - 2004
APN Promise
  • Started on the Microsoft development path. During my four years at APN Promise, Microsoft released the first beta version of .NET Framework, and I was lucky to become an early adopter of this technology.
  • Developed, from scratch, an intranet for McCann Erickson Poland that included a complete project management workflow and assets management tools (ASP.NET and C#).
  • Built from scratch, a media-buying and reach monitoring application, for McCann Erickson (WinForms, C#, Infragistics).
  • Created a complete intranet application for APN Promise; including a home screen or start screen is the main screen on a mobile operating system or computer program.
  • Implemented numerous improvements to the in-house-built eCommerce application and online shop; including a full integration with the back-end systems.
Technologies: Infragistics, Windows Forms (WinForms), Microsoft SQL Server, C#, .NET, Visual Basic, ASP.NET, ASP

Test Engineer

2000 - 2001
Prokom Software
  • Worked in my first full-time job as a software test engineer. I was lucky to work at one of the largest IT projects in the world (a new, greenfield effort to develop the back-end and front-end systems to drive the freshly reformed Polish National Insurance system).
  • Prepared test cases and verified output of batch-processing software on mainframe S/390. I quickly learned that I would have a lot of spare time in between new software releases so I used that time to develop a small suite of testing automation tools—way before I heard the "testing automation" term for the first time.
  • Built a tool that was capable of automating most of the test case preparation work: converting input data from input formats, building JCL batch programs for the mainframe to run, and uploading the whole job to the mainframe.
  • Developed my second tool that automated dumping the results from the database after the test batch completed, and presented the results in a GUI—highlighting the differences between data expected and received.
Technologies: JCL, Mainframe, IBM Db2

Software Developer

1997 - 2000
Freelance Work
  • Started doing odd jobs, as a freelance developer, for various customers in my home town while studying computer science at the Technical University of Gdansk.
  • Created the first-in-Poland website for a local branch of National Archives.
  • Used Delphi and Paradox database to build a library catalog and book lending application for the library at the local branch of National Archives.
  • Built an order management application for a family business (Turbo Pascal, self-rolled GUI framework, and file storage engine).
Technologies: Databases, Paradox, Turbo Pascal, HTML, Delphi


ExpertSender is a state-of-the-art email marketing automation solution. I architected and built the initial release using ASP.NET MVC, C#, MS SQL Server and MS SSAS, MSMQ, and HTML5 with JavaScript on the front-end.


Webreep is an advanced website feedback and analytics tool. I built most of the back-end and client-side features using ASP.NET, SQL Server, and JavaScript.


LabArchives is a complete solution for workflow and data management in a scientific lab. I developed a module for automatic data capture, categorization, and archiving that works both on PC and Mac computers.

Concep Platform

Concep delivers enterprise wide email marketing, mobile business development technology, and supportive services. I helped in transitioning the company from being a seller of third party email marketing product to a full SaaS provider by building the foundations for the overreaching Concep Platform—the base of their SAAS offering—and the first application built on top of this platform called ALERTS.


HTML, C#, CSS3, SQL, T-SQL (Transact-SQL), HTML5, Less, JavaScript, Sass, Java, ABAP, Visual Basic, Delphi


Entity, Razor, Windows Communication Framework (WCF), Knockout (Knockout.js), Bootstrap, .NET, ASP.NET MVC, ASP.NET Web API, Angular, ASP.NET Web Forms, Windows Presentation Foundation (WPF), Caliburn.Micro, ASP.NET, ASP, AngularJS, NHibernate, Rx


jQuery, PubNub, Lodash, jQuery UI, Windows Forms (WinForms), SAP Web Dynpro, Infragistics, Web API, NServiceBus, Node.js, Facebook API


Microsoft Visual Studio, Visual Studio, Git, Adobe AIR, StructureMap, Castle Windsor, JCL, Turbo Pascal, K2 Blackpearl, AWS SDK


Model View Viewmodel (MVVM), Test-driven Development (TDD), REST, Agile Software Development, Object-oriented Programming (OOP), Design Patterns, Service-oriented Architecture (SOA), Microservices, Scrum, Model View Controller (MVC), Behavior-driven Development (BDD), Concurrent Programming, Functional Programming


Windows, Oracle, SharePoint, Amazon Web Services (AWS), Oracle Database, Linux, Xamarin


Microsoft SQL Server, MySQL, SQL Performance, Amazon DynamoDB, SQL Server Analysis Services (SSAS), IBM Db2, Paradox, Databases, Redis, RavenDB


IIS, IoC, SOLID Principles, Website Performance, MSMQ, Amazon CloudSearch, Distributed Systems, Distributed Caches, Web Services, Mainframe, Xamarin.Mac

1997 - 2003

Master's Degree in Computer Engineering

Gdańsk University of Technology - Gdańsk, Poland