Custom Operational Software for E-commerce Merchants

Your store is growing. Manual processes can't keep up. Standard apps don't fit your business.

We build custom systems for fulfillment, inventory, and wholesale operations—the backend software that lets you scale without the operational bottlenecks.

Up to 75%
Faster Fulfillment Time
$2M+
Wholesale Revenue Enabled
Up to 40h
Manual Work Eliminated Per Week

Is This Right For You?

Not every merchant needs custom operational software. Here's how to know if we're a good fit.

You're a good fit if:

  • Your store does $1M-$20M+ annually
  • You've outgrown standard Shopify apps
  • Manual processes are bottlenecking growth
  • You need wholesale/B2B, multi-warehouse, or complex workflows
  • You're ready to invest in operational infrastructure

You're not a good fit if:

  • You're just starting out (standard apps work fine)
  • You need storefront design or marketing help
  • You want cheap, quick fixes
  • Your operations are simple and working well

Not sure? Reach out with your specific situation and we'll tell you honestly if custom work makes sense.

Trusted By

E-commerce Operators Like You

Experience

For 13 years, we've been building custom operational software for e-commerce businesses—the systems that run their operations, not just their storefronts.

Multi-Warehouse Fulfillment
Systems handling thousands of orders daily across multiple warehouses with automated routing and real-time inventory sync
Wholesale & B2B Platforms
Custom wholesale platforms managing hundreds of B2B customers with tiered pricing and complex workflows
Complex System Integrations
ERPs, warehouse systems, and hardware integrations connecting disparate platforms into cohesive operational systems
Long-Term Partnerships
Most clients work with us on retainer basis for 2+ years, building and maintaining the operational systems that power their growth

Custom vs Off-The-Shelf

When Standard Solutions Need Customization

Off-the-shelf apps work well for typical use cases. But as you scale, operational complexity grows—and generic solutions start requiring workarounds.

You've Outgrown Generic Apps

Generic apps don't support your specific workflow. Multiple warehouses with custom routing logic. Tiered wholesale pricing based on customer type. Integration requirements that exceed standard API limitations. You're paying $500+/month for functionality that still requires manual workarounds.

You Need Flexibility

Your business model requires specific features, but standard apps are built for common use cases. Custom picking workflows for perishable goods. Unique fulfillment rules per warehouse. Customer-specific pricing logic. Generic apps do 80% of what you need—but the missing 20% is critical for your operations.

You're Ready to Invest

You're paying for multiple apps that don't fully solve your problems. Fulfillment app ($300/mo), wholesale app ($250/mo), inventory sync ($150/mo)—plus per-order fees that scale with volume. After 12-18 months, custom development pays for itself while giving you exactly what you need.

Does This Sound Familiar?

These are the operational challenges we solve every day.

Multi-Warehouse Fulfillment Chaos

Your warehouse can't keep up. Orders route to the wrong location. Inventory is out of sync across multiple warehouses. You're losing sales because fulfillment is still manual and breaking under volume.

See how we solved this

B2B & Wholesale Limitations

You want to sell B2B but Shopify doesn't support tiered pricing, payment terms, or customer-specific catalogs. You're managing wholesale in spreadsheets and it's completely breaking down as you grow.

See how we solved this

Integration Hell

Your ERP, warehouse management system, and Shopify don't talk to each other. You're manually copying data between systems, errors are costing you money, and you can't get real-time visibility into your operations.

See how we solved this

Proven Expertise

Operational Systems We've Built

Over 13 years, we've built custom operational software for e-commerce businesses ranging from $1M to $20M+ in revenue.

Multi-Warehouse Fulfillment & Order Management

Built automated order routing, real-time inventory sync across multiple locations, and hardware integrations including scales, printers, and scanners. Systems processing 1,000+ orders daily, reducing fulfillment time by 75% and eliminating 40+ hours/week of manual work.

Wholesale & B2B Operations

Custom pricing engines, tiered customer portals, payment terms workflows, and B2B order management systems. Enabling merchants to add $2M+ wholesale revenue channels that Shopify's standard setup couldn't support.

Complex System Integrations

Shopify integrations with ERPs, warehouse management systems, third-party delivery services, and custom hardware. Replacing manual data entry and spreadsheet workflows with automated sync, saving 20+ hours per week.

Featured Case Study

aklamio

Aklamio is a leading customer incentives platform that enables brands to grow by acquiring new customers, retaining existing ones, and turning them into brand advocates. Founded in 2011, Aklamio operates across multiple international markets from their offices in Berlin, London, and Madrid, managing transaction data flows between hundreds of enterprise clients and affiliate networks worldwide.

Aklamio Case Study Referral Program Rule Builder

As Aklamio scaled their platform across European markets, they faced complex integration and data synchronization challenges:

  • Complex System Integration Requirements. Enterprise clients like PayPal and eBay required sophisticated real-time integrations to track referral conversions and share transaction data across multiple systems. These integrations needed to handle high transaction volumes while maintaining data accuracy across international markets.
  • Multi-Network Data Synchronization. Aklamio needed to integrate with various affiliate networks and partner systems worldwide, each with different APIs, data formats, and synchronization requirements. Transaction data needed to flow reliably between these systems in near real-time.
  • Cross-Border Transaction Processing. Managing transaction data across multiple European markets required handling different currencies, tax regulations, and compliance requirements while maintaining consistent data quality and audit trails.
  • Scale and Performance. As transaction volumes grew across their expanding client base, the platform needed optimizations to maintain performance while processing and routing large volumes of transaction data between integrated systems.

effizient provided a senior product engineer who joined Aklamio's team as staff augmentation, working alongside their developers to build complex integrations and data processing systems:

  • Enterprise Integration Architecture. Built robust integration systems connecting Aklamio's platform with PayPal and eBay, implementing sophisticated tracking mechanisms to attribute referral conversions accurately. Designed reliable data synchronization patterns to handle high-volume transaction flows across multiple enterprise systems.
  • Affiliate Network Integrations. Developed custom integration solutions for multiple affiliate networks and partner systems, creating flexible data transformation pipelines that normalized diverse data formats and API patterns into consistent internal representations.
  • Transaction Data Processing. Architected efficient data processing workflows to handle cross-border transactions, implementing validation, transformation, and routing logic that maintained data integrity while meeting performance requirements at scale.
  • System Optimization. Identified and resolved performance bottlenecks in data processing pipelines, optimized database queries handling transaction data, and improved the overall efficiency of data flows between integrated systems.

The work focused on building reliable integration infrastructure that could handle the complexity of enterprise-scale transaction data flows across international markets and diverse partner systems.

The integration systems delivered measurable operational improvements:

  • Reliable Enterprise Integrations. The custom integration solutions for PayPal, eBay, and multiple affiliate networks enabled accurate real-time tracking of referral conversions across systems, strengthening client relationships and demonstrating platform value.
  • Scalable Data Processing. The optimized data processing pipelines successfully handled growing transaction volumes across European markets, maintaining performance as the client base expanded.
  • Cross-Border Operations. The transaction processing systems reliably managed data flows across multiple currencies and regulatory environments, supporting Aklamio's international expansion.
  • Integration Foundation. The integration architecture established patterns that enabled Aklamio to onboard additional enterprise clients and affiliate networks more efficiently, accelerating their platform growth.

By building robust integration infrastructure and efficient data processing systems, effizient helped Aklamio scale their operations across international markets while maintaining the reliability and performance required by enterprise clients.

Facing similar integration or data synchronization challenges?

Let's discuss how we can build custom operational systems for your business.

30-minute call • No commitment • We'll provide actionable advice even if we're not the right fit

Our services

Scale Fulfillment Without Hiring
Automate the operational complexity of multi-location fulfillment. Automated order routing based on your rules, real-time inventory sync across warehouses, integration with warehouse systems and hardware. Reduce fulfillment errors and manual processing. Handle growing order volume without proportional staff increases. Built with Ruby on Rails backends, Shopify API, 3PL integrations, and hardware (scales, printers).
Build Sophisticated Wholesale Operations
Serve hundreds of wholesale customers without manual chaos. Custom pricing engines (tiered, volume-based, customer-specific), B2B customer portals for ordering and account management, order minimums, approvals, and custom workflows. Separate wholesale inventory and catalogs. Perfect for Shopify merchants running B2B alongside (or instead of) DTC. Built with Ruby on Rails, Shopify API, and customer authentication systems.
Get Real Visibility Into Your Inventory
Real-time sync across warehouses and channels, automated reorder triggers and stock allocation, custom rules for wholesale vs retail inventory. Integration with your existing systems. Make informed decisions with accurate inventory data instead of spreadsheets and guesswork. Built with Ruby on Rails, PostgreSQL, Shopify API, and ERP integrations.
Connect Your Systems
Stop copy-pasting between Shopify, your ERP (NetSuite, SAP, etc.), warehouse management systems, and accounting software. We build the connective tissue that makes your tech stack actually work together. Custom backends and APIs that sync data automatically and reliably. Built with RESTful APIs, webhooks, queue systems, and custom middleware.

Our Process

How We Work

A proven approach to building operational software that actually works for your business.

1
Discovery & Requirements

We start by deeply understanding your operations—current workflows, pain points, and growth goals. Not just what you want built, but why it matters to your business.

2
Solution Design

We map out the technical architecture, integration points, and implementation phases. You'll see exactly what we're building and why, before we write a line of code.

3
Iterative Development

We build in focused phases with regular check-ins, so you see progress throughout. Test features as they're built, provide feedback, and adjust as needed.

4
Ongoing Partnership

After launch, we stay with you. Most clients work with us on retainer for feature additions, optimizations, and strategic guidance as their operations evolve.

Technology Stack

Shopify Shopify
Ruby on Rails Ruby on Rails
PostgreSQL PostgreSQL
Hotwire

About effizient

“It's incredible how you just come up with solutions on the spot when given a problem. It is as if you have the whole codebase memorised in your head.”

Vlad, Senior Backend Engineer at aklamio

What we do

Building Operational Software for E-commerce Since 2017

effizient specializes in custom operational software for e-commerce businesses. Founded by a product engineer with over 13 years of experience building backend systems, integrations, and operational tools for growing merchants.

We've built fulfillment automation systems, wholesale platforms, multi-warehouse operations, and complex integrations for businesses scaling from $1M to $20M+ in revenue. We specialize in Ruby on Rails with Shopify and Shopify Plus, with deep expertise in the operational challenges that off-the-shelf apps can't solve.

When you work with us, you get a long-term technical partner who understands your business. Most clients stay with us for years on retainer, continuously improving their operational systems as they grow.

Founded
2017
Projects wrapped
30+
Features shipped
200+
Cups of Coffee
over 1M

I've spent over 13 years building operational software for e-commerce businesses, and one pattern keeps emerging: growing merchants hit a wall where manual processes can't scale and off-the-shelf apps don't fit their complexity.

That's where custom operational software makes the difference. Multi-warehouse fulfillment that routes orders intelligently. Wholesale portals with tiered pricing. Integrations that eliminate manual data entry. Systems that actually solve operational problems.

What drives me is building long-term partnerships with merchants who value their operations. Most clients work with us for years because operational software needs to evolve as the business grows.

Michael Wallbaum
Founder and Principal Consultant of effizient

Case Study

GRID (formerly HomeRun)

GRID, formerly known as HomeRun, is a proptech startup based in Hamburg, Germany, developing a mobile application designed to automate property management operations for private homeowners. The platform needed to aggregate financial data from multiple sources, manage documents, and provide actionable insights to simplify complex administrative workflows.

GRID (formerly HomeRun) Case Study Dashboard and Statistics

HomeRun needed to build operational systems that could handle complex data integration and document workflows at scale:

  • Banking Data Integration. The platform required secure integration with financial institutions to automatically ingest transaction data and banking information. This integration needed to handle authentication, data synchronization, and real-time updates while maintaining security standards.
  • Financial Data Processing. Once ingested, financial transactions needed to be processed, categorized, and analyzed. The system required sophisticated data pipelines that could handle diverse transaction formats, apply classification logic, and generate analytics across multiple properties and accounts.
  • Document Management Operations. Property owners needed to upload, store, organize, and retrieve various documents (contracts, invoices, maintenance records). The system required secure storage, efficient retrieval, comprehensive permission management, and mobile-friendly document handling.
  • Data Schema Design. The underlying database architecture needed to efficiently support complex financial analytics, document relationships, and property management workflows while maintaining performance as data volumes grew.

effizient provided a product engineer who joined GRID's team as staff augmentation, working as part of their development team to build the core operational infrastructure for financial and document management:

  • Banking Integration Architecture. Built complete integration with financial data APIs to securely access and synchronize banking information. Implemented reliable data ingestion pipelines that handled authentication, rate limiting, error recovery, and incremental data updates.
  • Financial Processing Pipeline. Developed the data processing system that ingested transactions, applied categorization algorithms, and transformed raw financial data into structured information. Built analytics views and aggregations that provided property owners with insights across their financial operations.
  • Document Management System. Implemented end-to-end document operations including secure upload mechanisms, cloud storage integration, efficient retrieval systems, and granular permission controls. Built mobile-optimized interfaces for document access and management.
  • Database Architecture. Designed and implemented the data schema supporting financial analytics, document relationships, and property operations. Optimized database queries, implemented strategic indexing, and built efficient data access patterns for the complex operational workflows.

The work focused on building production-ready operational systems that could reliably handle sensitive financial data and document workflows while providing the performance and security required for property management operations.

The operational systems delivered core functionality for HomeRun's platform:

  • Automated Financial Operations. The banking integration and processing pipelines eliminated manual data entry, automatically ingesting and categorizing transactions. Property owners gained real-time visibility into their financial operations across multiple properties and accounts.
  • Efficient Document Operations. The document management system provided secure, organized storage with efficient retrieval, enabling property owners to maintain comprehensive records and access critical documents from mobile devices.
  • Analytics and Insights. The financial processing system and analytics views transformed raw transaction data into actionable insights, helping property owners understand their operational performance and make informed decisions.
  • Scalable Foundation. The database architecture and optimized queries established a foundation that could handle growing data volumes as HomeRun expanded their user base, preventing performance degradation as operations scaled.

By building robust data integration pipelines, document management operations, and efficient database architecture, effizient provided GRID with the core operational infrastructure needed to automate property management workflows and deliver value to their customers.

Need operational infrastructure for complex data workflows?

We specialize in building systems that handle financial data, document management, and operational automation.

30-minute call • No commitment • We'll provide actionable advice even if we're not the right fit

Case Study

Grocerist

A SaaS platform serving specialty food retailers across North America. The platform provides Shopify-based e-commerce solutions designed for businesses selling perishable goods online, addressing the operational challenges unique to food retail.

Mobile Warehouse Fulfillment for Food Retail

Building a platform for food retail clients required solving operational challenges that standard e-commerce solutions couldn't address:

  • Perishable Inventory Management. Food retailers needed specialized inventory tracking for products with expiration dates, variable weights, and temperature requirements that standard Shopify apps couldn't handle effectively.
  • Multi-Warehouse Fulfillment Complexity. Coordinating order fulfillment across multiple warehouses and retail locations required custom routing logic to minimize transit time for perishable products while optimizing operational efficiency.
  • Third-Party Delivery Integration. Fresh food delivery required real-time integration with local delivery services, including scheduling, route optimization, and delivery window management beyond standard shipping integrations.
  • Multi-Tenant Platform Scaling. The platform needed to onboard and manage multiple independent retail clients while maintaining consistent performance and functionality across all stores.

effizient built custom operational software integrated with Shopify to handle the specific workflows of food retail:

  • Custom Shopify Theme for Food Retail. Developed a specialized Shopify theme optimized for food e-commerce, emphasizing product information relevant to food shoppers such as sourcing, freshness indicators, and dietary attributes.
  • Multi-Warehouse Fulfillment Application. Built a Ruby on Rails application with deep Shopify integration that pulls order and inventory data in real-time. The system handles complex fulfillment workflows for perishable goods that generic fulfillment apps cannot support.
  • Delivery Service API Integration. Created integration architecture connecting the platform with third-party delivery services, enabling automated scheduling and real-time coordination for time-sensitive fresh food deliveries.
  • Platform Management Tools. Developed internal tooling for efficient multi-store onboarding and management, allowing the platform to scale its client base without proportional operational overhead.

The engagement focused on building operational infrastructure that could handle the unique requirements of food retail while maintaining flexibility for different business models within the industry.

The custom operational software enabled the platform to serve a market underserved by generic e-commerce solutions:

  • Industry-Specific Solution. The Shopify-integrated custom software provided food retailers with operational capabilities specifically designed for perishable goods, differentiating the platform in a market dominated by generic tools.
  • Operational Efficiency. The multi-warehouse fulfillment system improved processing efficiency for time-sensitive perishable products, reducing manual workflows and operational complexity.
  • Reliable Fresh Delivery. Third-party delivery integration enabled retailers to offer dependable, time-specific delivery windows for fresh products, expanding their market reach and improving customer satisfaction.
  • Platform Scalability. The management tooling allowed the platform to onboard new retail clients efficiently, supporting business growth without requiring proportional increases in operational resources.

The operational software foundation positioned the platform to serve specialty food retailers with solutions tailored to their specific challenges in an industry poorly served by off-the-shelf e-commerce tools.

Struggling with fulfillment operations or need custom e-commerce infrastructure?

From multi-warehouse fulfillment to custom wholesale platforms—we build the operational systems that let you scale.

30-minute call • No commitment • We'll provide actionable advice even if we're not the right fit

Trusted by Growing E-commerce Businesses

aklamio Grocerist HomeRun Mondosano

Ready to Scale Your Operations?

If you're hitting the limits of standard apps and need custom operational software, let's talk.

Ready to discuss your project? Schedule a 30-minute discovery call below—no obligation. We'll discuss your setup, challenges, and whether custom work makes sense.

Not ready for a call? Reach out below with your specific situation and we'll tell you honestly if custom work makes sense.

Based in Austin, Texas. Working with merchants globally.

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