Hire Email Developers — HTML & Template Specialists

Email clients do not behave like browsers. Outlook renders HTML using Microsoft Word's engine, not a proper browser, which means modern CSS is largely ignored. Gmail strips out certain CSS. Apple Mail has its own rendering quirks. Email developers must use table-based layouts, inline styles, and platform-specific workarounds that would be considered terrible practice in web development but are the only reliable approach in email.

Most engagements begin within 48 hours of contract signing. For project-based work — building a specific template set — we typically deliver a first draft within one week of receiving the design files. For ongoing retainer engagements, the developer is available from the start date agreed at contract signing.

We build and deploy templates in Klaviyo, Mailchimp, Salesforce Marketing Cloud, HubSpot, Braze, Iterable, and Customer.io. We adapt templates to each platform's variable and personalisation syntax, configure dynamic content blocks, and test within the platform's preview and test-send tooling before sign-off.

Many email clients automatically invert or adjust colours in dark mode, which can break logos with transparent backgrounds, make light-coloured text invisible, and distort button colours. We handle this with prefers-color-scheme CSS overrides, forced colour declarations for Outlook, and image variants (PNG with appropriate backgrounds) that render correctly in both modes. We test against dark mode in Gmail iOS, Apple Mail, and Outlook on macOS.

Both approaches are available. MJML is a productive abstraction for simpler, modular templates — it compiles to compatible HTML and handles a lot of table scaffolding automatically. For complex layouts, advanced Outlook workarounds, or tight integration with a specific ESP's templating system, we write the HTML directly. We choose the approach that best suits your template complexity and team maintenance requirements.

Outlook is the hardest email client and the one we spend the most time on. We use MSO conditional comments to target Outlook exclusively, VML for backgrounds and rounded buttons, table-based column structures, and explicit widths on all elements. Every template is tested in Outlook 2016, 2019, and 365 on Windows using Litmus before delivery.

Yes. A modular template system consists of a set of reusable content blocks — hero, two-column, text, CTA, footer — that your marketing team assembles into campaigns without touching code. We design and build the block library in your ESP's drag-and-drop editor or as raw HTML modules, document usage guidelines, and train your team on composition.

We follow WCAG 2.1 AA guidelines as closely as email client limitations allow. This includes a minimum 4.5:1 contrast ratio for body text, descriptive alt text on all meaningful images, a logical heading structure using ARIA roles, and a tab order that makes sense when navigated by keyboard or screen reader. We document any client-imposed limitations that prevent full compliance.

We test across 90+ client and device combinations in Litmus or Email on Acid, covering all major versions of Outlook, Gmail, Apple Mail, Yahoo Mail, and Samsung Mail in both light and dark mode on desktop and mobile. We resolve rendering issues before delivery so you receive a template that has been validated, not just visually reviewed in one client.

Yes. We implement templates within your specific platform, using its personalisation syntax for first name, product recommendations, dynamic offers, and conditional content blocks. For transactional emails triggered by application events, we can also work with your engineering team to integrate templates via Postmark, SendGrid, or AWS SES APIs.

All Kultrix email developers are mid-to-senior level with a minimum of three years of production HTML email experience across multiple industries and ESPs. Every developer is assessed on Outlook compatibility, dark mode implementation, and cross-client testing methodology before joining our bench.

Kultrix email developers are vetted specialists — not general web developers who occasionally build emails. Every template is tested in Litmus or Email on Acid across 90+ clients before delivery. We manage quality, handle revisions, and provide a dedicated account manager. You get a finished, tested template rather than a file that looks right in the preview and breaks in production.