Website Backend Developer

Population Services International • , DC

5d • Remote

About The Position

Viya Health is seeking applications from qualified backend web developers to establish an Indefinite Delivery / Indefinite Quantity (IDIQ) contract. Under this arrangement, Viya Health will issue Task Orders on an as-needed basis — scoped by project, functional area, or market (corporate or consumer) — rather than committing to a fixed project upfront. Successful applicant(s) will be placed on a roster from which Task Orders may be issued. There is no guarantee of a minimum volume of work; Task Orders will be issued based on organizational need.

Requirements

• 3+ years of professional WordPress backend development experience
• Strong WooCommerce expertise: extensions, webhooks, custom payment gateway integration, and order workflow management
• Proficiency with PHP and the WordPress plugin/theme development ecosystem
• Experience with WPEngine or similar managed WordPress hosting (staging, SFTP, Git deployments)
• Familiarity with Elementor Pro and Meta Box for custom content architecture
• Experience integrating third-party APIs and webhooks within the WordPress environment
• Working knowledge of MySQL and WordPress database structure
• Comfort with Git-based workflows and basic command-line tools
• Strong Next.js/React experience

Nice To Haves

• Experience with African payment gateways (Yoco, PesaPal) or similar regional providers
• Familiarity with 3CX plugin configuration and VoIP/chat website integrations
• Google Tag Manager, GA4, and Facebook Pixel implementation experience
• Knowledge of web performance optimization: caching layers, image compression, CDN configuration
• Accessibility compliance experience (WCAG 2.1 or similar standards)
• Prior experience under IDIQ, T&M, or similar contract vehicles

Responsibilities

• WordPress theme and plugin development, customization, and troubleshooting
• WooCommerce configuration, extensions, and payment gateway integrations
• Custom post types, fields, and data structures via Meta Box
• Third-party integrations — including 3CX, Mailchimp, HubSpot, Google, and payment providers. This may also include integrations with WhatsApp or Contentful CMS.
• Performance tuning: caching (EverCache), image optimization (Imagify), and CDN configuration (Fastly)
• Security monitoring, firewall configuration, and vulnerability remediation (Jetpack, WPEngine)
• Analytics and tracking setup via Google Tag Manager, GA4, and Facebook Pixel
• Staging, deployment, and Git-based workflows via WPEngine, or possibly Next.js
• Accessibility compliance support in coordination with Ally tooling

What This Job Offers

• Career Level: Mid Level
• Education Level: No Education Listed