E.U. Based Responsive Email Developer | Graphic Designer | Mariusz Opalka

I specialize in creating Mobile Responsive Newsletters, Templates for MailChimp, Campaign Monitor, Constant Contact, Aweber, iContact, Pardot and numerous others.

In September 2015, I was acknowledged by MailChimp for discovering bugs in their new 2015 Templates which helped the company to rectify these issues. I am a premium MailChimp member and MailChimp incorporates my HTML/CSS code which correctly renders in Outlook for client emails.


  • 8 Upwork Talent Cloud Groups member.
  • Cooperate with “Fortune 500 companies”.
  • 2600 projects completed and about 6000 hours worked on Upwork.
  • 50% Repeat Clients!
  • 8+ years experience in design and coding email templates

My major services include:

  • DESIGN & CODING custom email newsletter templates
  • TEST each email on Litmus and spam filters
  • Convert designs to RESPONSIVE Email Newsletters
  • Program transactional emails for shopping carts
  • Convert designs into DRAG&DROP email editors
  • Setup marketing CAMPAIGNS
Using the latest standards and techniques in coding such as XHTML, HTML5 and CSS3 allows me to produce high quality code. I do not mind to run extra hours to provide my clients with complete satisfaction of my services.

I test emails across around 50 most popular email clients and spam filters

My English is fluent. I lived and worked 3 years in Ireland (Roscommon).

I am experienced in the following technologies / softwares:
HTML5/XHTML, CSS, jQuery, SEO, Adobe’s (Photoshop, DreamWeaver, Illustrator, Flash, Premiere, In-Design), Corel Draw, Quark and many many other.

My biggest Clients