Extend your capacity across Shopify, WordPress, technical SEO, and custom development with 24+ senior in-house engineers working under your direction.

Since 2012, we’ve helped agencies take on demanding client briefs with reliable delivery, clear communication, and strict NDA protection. More technical capacity, without permanent hiring overhead.

Discuss an agency partnership ↗

Your brand. Our code.

Your agency owns the relationship.
We handle the technical delivery.

You lead client communication, account management, strategy, and creative direction. Commercial terms and invoicing stay with your agency. Your brand stays firmly in front.

We execute the code, integrations, performance improvements, and multi-device QA quietly behind the scenes. Deliverables, repositories, and technical handoffs remain unbranded.

We fit directly into Jira, Monday.com, ClickUp, Asana, or your preferred tools. No new system. No competing client relationship. Just a senior technical team that works the way your agency does.

See our delivery process ↗

Agency partnershipHiMOD

White-label deliveryShopify

Shopify development ↗Agency partnershipCharles Fish

Technical implementationCommerce

Custom commerce features ↗Agency partnershipSunmark

Frontend, backend & QAWeb

Corporate web development ↗Direct clientSarla Sarees

Custom Liquid architectureShopify

Luxury apparel ↗Direct clientManisha Timothy

Responsive digital portfolioDesign

Designer fashion ↗Direct clientAarambh Arts

Galleries & performanceCreative

Fine art & prints ↗Direct clientAccurate Arcana

Schema & custom templatesCustom

Specialist digital platform ↗Direct clientAdept Recruiting

Job boards & technical SEOPlatform

Recruitment platform ↗

Agency work & direct client builds.

Send us the difficult part. When a client needs technical capacity your team doesn’t have available, keep the opportunity. We help you scope it, build it, and deliver it under your brand.

Built around
your agency:

White-label delivery

End-to-end technical execution under your agency’s brand. Clean repositories, unbranded handoffs, and strict NDA protection from the first brief.

View all engagement models ↗

Dedicated developers

A senior technical resource allocated to your projects for consistent monthly capacity, ownership, and delivery velocity.

View all engagement models ↗

Fractional teams

A blended engineering pod with frontend, backend, and QA expertise. Flexible specialist capacity without a full-time hiring commitment.

View all engagement models ↗

Simple to start.
Structured to scale.
Clear at every stage.

The Zest Engineering Method™ ↓

Your brief

Scope

Review the brief, designs, and technical dependencies. Agree on milestones, timelines, and commercial terms before development begins.

A partnership mindset built on trust, shared standards, and reliable technical delivery.

Your clients stay yours.

We work under your direction and strict NDA. Your agency retains the client relationship, strategy, creative direction, and commercial terms.

Capacity that fits your workflow.

Senior developers plug into your existing tools and communication channels. Scale through dedicated engineers, fractional teams, or project delivery.

Delivery you can put your name behind.

Clear scopes, version-controlled code, multi-device QA, and documented handoffs protect your reputation through every milestone.

Zest Web SolutionsYour white-label engineering partner

“Your agency keeps the client relationship. We handle the technical execution behind the scenes.”

We’re reliable.

Clear scopes, agreed milestones, and regular status updates keep your client commitments on track. Delivery doesn’t stop at launch. Eligible projects include two months of post-launch maintenance, with flexible retainer support thereafter.

★ 5.0 Clutch ↗

“We stopped turning down complex projects. We stopped stressing about technical delivery. Zest acts as our silent development team — white-label, NDA-protected, and 5-star every time.”

Amad H. & Agency PartnersWhite-Label Partner Program

Read on Clutch ↗

★ 5.0 Clutch ↗

“I gave Zest a trial after hesitation. Within one month, they proved themselves completely. Core Web Vitals Passed with sub-second LCP. 5 stars for white-label engineering and post-launch support.”

Sandeep ModiMD at AndersonBPO

Read on Clutch ↗

★ 5.0 Clutch ↗

“The team has been timely across every milestone, interactive, responsive, and genuinely skilled senior developers. Our conversion rate and organic visibility improved dramatically with their work.”

Tulip D.Co-Founder, Seawave

Read on Clutch ↗

01 / 03

How the partnership works.

Built for Agencies That Need More Technical Capacity.+

Growing digital, creative, and SEO agencies regularly encounter operational friction when client demand exceeds internal development capacity. We solve the fulfillment challenge without adding permanent overhead.

Client Work Outgrows Internal Capacity

Your sales or account team wins the project, but your existing developers are fully booked across current sprints. Turning down projects limits growth.

Hiring Is Too Slow

Recruiting, screening, onboarding, and managing a new full-time senior developer takes months and creates heavy permanent payroll commitments.

Specialist Work Is Hard to Staff

Shopify Liquid, WordPress Gutenberg, technical SEO, speed optimization, and custom API integrations require distinct technical disciplines that are difficult to staff in a single hire.

Project Deadlines Don’t Wait

Client launch commitments remain fixed even when internal staff fall ill, leave, or encounter unexpected technical blockers.

You Need Delivery Without Losing Client Control

You need a reliable technical execution partner that respects boundaries, signs strict NDAs, and never attempts to bypass your agency to reach your clients.

Clear Separation of Responsibilities

Your Agency Owns the Relationship. We Handle the Technical Delivery.+

Your brand stays firmly in front. Zest works quietly behind the scenes. We execute the code, run multi-device QA, and handle technical implementation under your brand direction.

Your Agency Owns

Client relationship & account management

Strategy & brand positioning

Creative direction & UI/UX design

Commercial terms & invoicing

Client communication & stakeholder presentations

Zest Supports

Shopify & Shopify Plus development

WordPress & WooCommerce development

Custom development, PHP, Laravel & React

Third-party API & webhook integrations

Technical SEO & JSON-LD schema implementation

PageSpeed & Core Web Vitals optimization

Multi-device QA & cross-browser testing

Ongoing maintenance & technical troubleshooting

PARTNER PROFILE

Ideal For Agencies That Need Technical Delivery

✓ Have too much technical work

✓ Need specialist Shopify developers

✓ Need WordPress capacity

✓ Need SEO fulfillment

✓ Need overflow development

✓ Need dedicated developers

✓ Want a fractional technical team

✓ Need reliable white-label execution

Engagement Options

Engagement Models Built Around How Your Agency Works.+

Every agency has different project pipelines, retainer requirements, and resourcing models. Choose the structure that best fits your agency’s operating rhythm.

Model 01

White-Label Delivery Partner

End-to-end technical execution for client builds delivered completely under your agency’s brand, unbranded Git commits, and internal processes.

Model 02

Dedicated Developer

A dedicated technical resource allocated exclusively to your agency’s projects for continuous monthly velocity and consistent technical ownership.

Model 03

Fractional Technical Team

A blended engineering pod providing specialized frontend, backend, and QA capacity on a fractional retainer without full-time overhead.

Model 04

Project / Sprint Delivery

Fixed scope, agreed milestone deliverables, and defined delivery timelines for standalone store builds, theme refactors, or custom web apps.

Model 05

Staff Augmentation

Direct technical reinforcement when your in-house developers are overloaded by unexpected sales spikes or compressed client deadlines.

Model 06

Monthly Technical Retainer

Guaranteed monthly hours for continuous feature improvements, platform updates, speed maintenance, and proactive technical care.

Model 07

Ongoing Support

Post-launch technical care, responsive bug fixes, security patch updates, and ongoing technical support for your agency’s client base.

Model 08

Fixed-Price Projects

Clearly defined deliverables, explicit technical boundaries, and fixed commercial terms for predictable client margin protection.

Full Technical Breadth

Multi-Disciplinary Technical Coverage Across Every Major Stack.+

Rather than managing separate freelancers for Shopify, WordPress, SEO, and custom integrations, partner with one unified engineering bench covering all four disciplines.

Shopify

Custom Liquid Theme Development
Shopify Plus & B2B Portals
Checkout Extensibility & Functions
Storefront API & Headless Builds
GraphQL & Custom App Integrations
Custom Sections & Metafield Logic
PageSpeed & Core Web Vitals

WordPress

Custom WordPress Theme Development
Gutenberg Block Architecture
WooCommerce Store Development
Custom Plugin & API Development
Platform Migrations & Upgrades
Security Hardening & Malware Removal
Speed Optimization & Caching

Technical SEO

Comprehensive Technical Audits
JSON-LD Entity Schema Markup
Core Web Vitals & Sub-800ms Speed
Crawl Budget & Robots Optimization
301 Redirect Mapping & Migrations
Google Search Console Resolution
GA4 & Google Tag Manager Setup

Custom Dev

PHP & Laravel Web Applications
Node.js Backend Microservices
React & Next.js Frontends
Custom REST & GraphQL APIs
ERP, CRM & Inventory Integrations
Database Optimization & Architecture
Custom Business Logic & Workflows

Structured Delivery SOP

Simple to Start. Structured to Scale.+

A transparent onboarding and execution framework that eliminates ambiguity and ensures predictable delivery on every client milestone following the Zest Engineering Method™.

Introduction Call

Discuss your agency’s typical client requirements, current bandwidth bottlenecks, preferred tech stacks, and working models.

Alignment

Project Discovery

Review project specifications, Figma UI designs, technical dependencies, and client expectations to establish a clear architectural plan.

Analysis

Scope + Quote

Receive a clear scope of work with milestone timelines, technical assumptions, and transparent wholesale commercial terms.

Clarity

Team Introduction

Meet the dedicated senior developers and technical leads assigned to your account who will be executing your agency’s builds.

Team

Access + Platform Setup

Set up necessary access across Shopify, WordPress, cPanel/hosting, repositories, and your agency’s preferred project management platforms.

Setup

Development

Execute the agreed technical scope using version-controlled code, clean commit hygiene, and regular async updates in your workspace.

Building

QA & Verification

Rigorous testing across functionality, responsiveness, forms, checkout flows, links, speed, and schema using the Technical QA Framework.

Quality

Delivery & Launch

Deliver unbranded staging environments, complete client review sign-offs, and assist with smooth, zero-downtime production cutovers.

Delivery

Ongoing Support

Provide 2 months of post-launch maintenance at no additional cost on eligible projects, followed by ongoing retainer support as needed.

Support

Zero Administrative Friction

Fits Into Your Existing Agency Workflow.+

We adapt to your agency’s established tooling, communication habits, and approval gates rather than forcing you to learn a new system or change your processes.

Project Management

We plug directly into Jira, Monday.com, ClickUp, Asana, Basecamp, Notion, Trello, or Azure DevOps.

Communication Channels

Daily communication via Slack, Microsoft Teams, Google Chat, Email, or WhatsApp according to your preference.

Hosting & Access

Seamless collaboration across Shopify Collaborator access, WordPress Admin, cPanel, Cloudways, AWS, and WP Engine.

Progress & Visibility

Daily CRM task updates where required and alternate-day status reports through agreed communication channels.

Blocker Escalation

Proactive identification and immediate escalation of technical dependencies or third-party blockers.

Documentation & SOPs

Clean technical handoff documentation, code comments, and unbranded Loom video walkthroughs.

Strict Quality Benchmarks

Technical Delivery You Can Put Your Name Behind.+

When work goes out under your agency brand, technical execution must be flawless. We adhere to rigorous engineering, testing, and security specifications on every milestone.

Pillar 01

Development Standards

Clean, modular, and maintainable code architecture
Reusable components and semantic HTML5
Mobile-first fluid responsive implementation
SEO-aware DOM structure and crawl hygiene
Performance-conscious asset loading and minification
Accessibility considerations (WCAG 2.1 AA)
Version-controlled Git changes on feature branches
Zero unnecessary third-party plugins or app bloat
Comprehensive documentation for custom logic

Pillar 02

QA Standards

Functional verification of all buttons, forms & logic
Responsive validation across physical devices (iOS/Android)
Cross-browser testing (Chrome, Safari, Firefox, Edge)
Form submission and auto-responder testing
Navigation, dropdown, and mobile menu audits
Broken link and 404 error verification
API integration and webhook payload validation
Checkout, payment gateway & cart flow testing
Core Web Vitals and PageSpeed performance audit
Console error and JavaScript exception review

Pillar 03

Security Standards

Strict principle of least-privilege user access
Secure credentials handling and encrypted storage
Core, theme, and plugin patch maintenance
Malware scanning on supported WordPress care plans
Backup verification prior to major deployments
CORS and Content Security Policy (CSP) header support
Sanitized database queries preventing SQL injections
Security-conscious frontend and backend coding

Verified Track Record

Verified Project Delivery Evidence. Delivered & Live.+

A clear overview of real work delivered through our white-label agency partnerships and direct client engagements. Explore more outcomes in our Case Studies.

Delivered Through Agency Partnerships

Agency Delivery Project

HiMOD

Shopify ecommerce development delivered through an agency partnership. Zest provided technical development, theme engineering, and custom styling working as the agency’s silent technical delivery partner.

Visit Live Site

Agency Delivery Project

Charles Fish

Shopify ecommerce project delivered through an agency partnership. Zest handled custom coding, technical implementation, and feature delivery within the partner agency’s established workflow.

Visit Live Site

Agency Delivery Project

Sunmark

Corporate web platform delivered through an agency relationship. Zest provided backend development, frontend implementation, and responsive QA support behind the agency brand.

Visit Live Site

Direct Client & Zest Web Builds

Direct Client Project

Sarla Sarees

Custom Shopify ecommerce store designed, developed, and currently maintained by Zest Web Solutions with bespoke Liquid architecture, mobile-first UX, and global multi-currency checkout.

Visit Store Case Study

Direct Client Project

Manisha Timothy

Custom luxury personal brand website and digital portfolio engineered for fast loading, typography precision, and seamless mobile viewing.

Visit Live Site

Direct Client Project

Aarambh Arts

Creative brand showcase and portfolio build designed with responsive image galleries, clean layout rhythm, and optimized Core Web Vitals.

Visit Live Site

Direct Client Project

Accurate Arcana

Specialist digital platform engineered with structured schema, responsive layouts, fast load times, and custom content templates.

Visit Live Site

Direct Client Project

Adept Recruiting

Corporate recruitment agency platform featuring custom job board integration, lead capture forms, and technical SEO architecture.

Visit Live Site

White-Label Technical Delivery

Send Us the Difficult Part.+

When a client project needs technical capacity your team doesn’t have available, you don’t need to turn the work away or hire before you can deliver it. Send us the technical requirement and we’ll help you scope the execution.

Shopify / Shopify Plus development

Theme architecture, Liquid, custom sections, migrations and integrations.

WordPress / WooCommerce

Custom development, WooCommerce, troubleshooting, rebuilds and ongoing maintenance.

Technical SEO Implementation

Turn SEO recommendations into actual technical changes across the website.

Performance & Core Web Vitals

Diagnose and implement fixes for speed, rendering, JavaScript and page experience.

Integrations & Custom Development

APIs, webhooks, third-party platforms, custom functionality and technical workflows.

Overflow / Ongoing Delivery

Additional technical capacity for agencies with recurring client work or overloaded teams.

“Your agency keeps the client relationship. We handle the technical execution behind the scenes.”

Send Us a Project Brief See Our Delivery Evidence

Verified Agency Feedback

Agency Partnership in Action+

How our silent engineering bench enables digital agencies to take on high-volume and technically demanding client briefs with confidence.

The Agency Challenge

A growing digital agency faced high client demand and complex ecommerce/custom technical scopes that strained internal developer capacity.

The Zest Role

Deployed as a silent white-label technical bench, handling technical execution, custom functionality, and multi-device QA under NDA.

The Outcome

Zero lost sales opportunities, consistent on-time client handoffs, and scalable technical delivery without hiring full-time overhead.

“We stopped turning down complex projects. We stopped stressing about technical delivery. Zest acts as our silent development team — white-label, NDA-protected, and 5-star every time.”

Amad H. & Agency Partners White-Label Partner Program

Verified Clutch Review

Discuss a Similar Partnership

Long-Term Technical Care

Delivery Doesn’t Stop At Launch.+

For eligible development projects, Zest provides two months of post-launch maintenance and support at no additional cost. Following that, we prepare tailored ongoing maintenance plans aligned with your agency’s client support commitments.

Plugin & Theme Updates

Scheduled updates tested in staging before production deployment to prevent compatibility issues.

Security Monitoring

Proactive monitoring, vulnerability patching, and malware protection for supported WordPress environments.

Backup Verification

Automated scheduled backups with documented restoration procedures for business continuity.

Uptime & Speed Audits

Continuous monitoring of server response times, Core Web Vitals health, and platform availability.

Feature Improvements & Fixes

Ongoing development hours for seasonal banners, checkout adjustments, custom sections, and technical fixes.

Note: The exact ongoing maintenance scope and SLA terms are defined according to specific project requirements.

Long-Term Value

Why Agencies Choose a Technical Partner Instead of Another Vendor.+

Reliable technical execution, transparent communication, and strict non-competes. That is why agencies across Australia, the UK, the UAE, South Africa, Asia, and the US rely on Zest.

Flexible Technical Capacity

Scale your development output up or down based on client flow without permanent hiring delays or salary liabilities.

Agency-First Collaboration

We work strictly under your direction, adopt your internal workflows, and never compete for your client relationships.

Clear Scopes & Timelines

Detailed milestone deliverables, timeline confirmations, and upfront commercial terms eliminate scope creep.

Structured Communication

Daily CRM updates where required and regular status reports across global time zones (AEST, GMT, GST, SAST, SGT, EST).

Technical Breadth

A single engineering partner across Shopify, WordPress, Technical SEO, and custom API development.

Post-Launch Support & Retainers

Two months of post-launch care included for eligible builds, with flexible ongoing retainer support options.

Agency Partner FAQs

Have a project
to deliver under your brand?

Discuss a partnership Book a call

Good questions. Clear answers.

Agency partnership FAQs

Do you work completely white-label?

Yes. We operate as a silent technical delivery partner under legally binding NDAs. We can push code to your agency’s repositories, use your internal communication channels, and deliver completely unbranded work under your direction.

Can we keep the client relationship?

Yes. Your agency retains 100% of the client relationship, account management, strategy, and creative direction. We do not contact your clients directly unless explicitly requested to attend a technical meeting under your agency’s brand.

Can Zest work inside our CRM?

Yes. We can work directly inside your existing CRM and project management systems including Jira, Monday.com, ClickUp, Asana, Basecamp, Notion, Trello, and Azure DevOps.

Can you work with our project management system?

Yes. We adapt to your agency’s preferred platform and maintain task boards, status transitions, and issue tracking in your workspace.

Can you work directly with our designers?

Yes. We regularly collaborate with internal or freelance agency designers, converting Figma, Adobe XD, or Sketch designs into clean, responsive code.

Can you work with our SEO team?

Yes. We collaborate closely with agency SEO specialists to implement structured schema, optimize Core Web Vitals, preserve redirect maps, and resolve technical crawl issues.

Can you provide a dedicated developer?

Yes. We offer dedicated developer models where a senior engineer is allocated exclusively to your agency projects for consistent monthly capacity.

Can you provide a fractional technical team?

Yes. We provide fractional technical teams pairing senior developers with technical leadership to give you flexible capacity without permanent hiring overhead.

Do you offer fixed-price projects?

Yes. For well-defined scopes, we provide transparent fixed-price quotes with milestone deliverables and timeline confirmations.

Do you offer monthly retainers?

Yes. We offer monthly technical retainers covering ongoing development, maintenance, security monitoring, and reactive technical support.

Can you work on urgent projects?

Yes. We can accommodate rush timelines and sprint overflows depending on team capacity, with clear feasibility confirmation before kickoff.

Can you work with international agencies?

Yes. We work with digital agencies across Australia (AEST), the United Kingdom (GMT), the UAE (GST), South Africa (SAST), Singapore (SGT), and the United States (EST/PST).

Can you work on existing Shopify stores?

Yes. We handle existing Shopify themes, custom Liquid refactoring, performance optimization, feature extensions, and app integrations.

Can you work on existing WordPress websites?

Yes. We support existing WordPress and WooCommerce websites, custom plugins, Gutenberg blocks, and legacy PHP maintenance.

Can you support projects after launch?

Yes. Two months of post-launch maintenance is included at no additional cost for eligible projects, after which ongoing support plans are available.

How does onboarding work?

Onboarding begins with a partnership discovery call, NDA execution, workflow alignment, tool access setup, and technical team introductions.

Will you communicate directly with our client?

No. Our default standard is zero direct client contact. We work entirely behind the scenes under your agency’s brand and direction.

Can you sign an NDA or work under our agency agreement?

Yes. We execute mutual non-disclosure and non-compete agreements prior to receiving client briefs or repository access.

Your agency’s technical delivery partner, behind the scenes, under your brand.

Your brand. Our code.

Your agency owns the relationship. We handle the technical delivery.

Built around your agency:

White-label delivery

Dedicated developers

Fractional teams

Simple to start. Structured to scale. Clear at every stage.

Scope

Build

Validate

A partnership mindset built on trust, shared standards, and reliable technical delivery.

Your clients stay yours.

Capacity that fits your workflow.

Delivery you can put your name behind.

We’re reliable.

How the partnership works.

Client Work Outgrows Internal Capacity

Hiring Is Too Slow

Specialist Work Is Hard to Staff

Project Deadlines Don’t Wait

You Need Delivery Without Losing Client Control

Ideal For Agencies That Need Technical Delivery

White-Label Delivery Partner

Dedicated Developer

Fractional Technical Team

Project / Sprint Delivery

Staff Augmentation

Monthly Technical Retainer

Ongoing Support

Fixed-Price Projects

Introduction Call

Project Discovery

Scope + Quote

Team Introduction

Access + Platform Setup

Development

QA & Verification

Delivery & Launch

Ongoing Support

Project Management

Communication Channels

Hosting & Access

Progress & Visibility

Blocker Escalation

Documentation & SOPs

Charles Fish

Sarla Sarees

Manisha Timothy

Aarambh Arts

Accurate Arcana

Adept Recruiting

Shopify / Shopify Plus development

WordPress / WooCommerce

Technical SEO Implementation

Performance & Core Web Vitals

Integrations & Custom Development

Overflow / Ongoing Delivery

The Agency Challenge

The Zest Role

The Outcome

Plugin & Theme Updates

Security Monitoring

Backup Verification

Uptime & Speed Audits

Feature Improvements & Fixes

Flexible Technical Capacity

Agency-First Collaboration

Clear Scopes & Timelines

Structured Communication

Technical Breadth

Post-Launch Support & Retainers

Have a project to deliver under your brand?

Agency partnership FAQs

Your agency’s
technical delivery partner,
behind the scenes,
under your brand.

Your agency owns the relationship.
We handle the technical delivery.

Built around
your agency:

Simple to start.
Structured to scale.
Clear at every stage.

Have a project
to deliver under your brand?