Data map and sync rules
Every field, trigger, and conflict rule written down and approved before we build anything.
The Problem
Retyped Orders, Silent Failures, and a Plugin Nobody Can Fix
It shows up once 2 or 3 systems share the same data. People fill the gaps by hand, and connector failures stay hidden until a customer notices.
01 · Retyping
Your team copies orders into the ERP and leads into HubSpot.
Direct connections move data through each system's API with no retyping.
02 · Silent failures
A failed step emails an inbox nobody reads.
Failures alert your team with the record and the reason.
03 · Broken plugins
An update broke your sync plugin, and the vendor answers in days.
Integrations run in your accounts, documented so your next developer can follow.
04 · Spreadsheet sprawl
Every workaround adds a spreadsheet and another place for errors.
A data map sets every field, trigger, and failure rule first.
Your team copies new orders from the store into the ERP, then pastes website leads into HubSpot. An automation step fails on Tuesday, and the error email lands in an inbox nobody reads. The plugin that syncs inventory broke after an update, and its vendor answers in 3 days. Every workaround adds a spreadsheet, and every spreadsheet adds another place for data to go wrong.
We start with a data map: every field, every trigger, and what should happen when a system says no. Then we build direct connections through each system's API, with a queue, retries paced to each rate limit, and logging for every record. When something fails, you get an alert with the record and the reason. Your data moves on its own, and failures stop hiding.
A data map you approve
Every field, trigger, and failure rule is written down before any code is written.
Failures you can see
Each failed record is logged with its reason and alerts someone on your team.
Code you own
Integrations run in your accounts, with documentation your next developer can follow.
Our Integration Build Process
From Data Map to Live Sync in Five Clear Steps
You review every field, trigger, and failure rule before we build. Each step ends with something you can check before we move on.
We review your systems, their API documentation, data volumes, and the manual steps you want gone. You get a written scope and a fixed price. If Zapier, Make, or a native connector already covers your case, we'll tell you before we quote.
What's Included
What You Get With Data and API Integration Services
Every plan covers field mapping, connectors, error handling, testing, documentation, and support. Larger plans add more systems, queues, and a middleware layer.
Compare Options
DeveloperLook vs an iPaaS Tool vs a Ready-Made Connector
An iPaaS tool like Zapier or Make suits simple, low-volume flows, and a ready-made connector suits standard pairs. We fit when your volume, custom rules, or data control outgrow both.
| Feature | DeveloperLookBest fit | iPaaS | Connector |
|---|---|---|---|
| Upfront cost | From $1,200, fixed scope | Low, then monthly fees | Low or included |
| Time to launch | 2 to 12 weeks | Hours to days | Hours to days |
| Custom logic | Any rule you need | Limited by the builder | The vendor's options |
| Running cost | Hosting only | Priced by usage | Flat or tiered fee |
| Error handling | Queues, retries, alerts | Basic retries and emails | Vendor-controlled |
| Data path | Direct between your systems | Through the vendor's servers | Usually through the vendor |
| Code ownership | Your code and docs | Workflows on their platform | Vendor-owned |
| Best for | Volume, custom rules, control | Simple, low-volume flows | Standard system pairs |
DeveloperLook
iPaaS
- Upfront cost
- DeveloperLook: From $1,200, fixed scopeiPaaS: Low, then monthly fees
- Time to launch
- DeveloperLook: 2 to 12 weeksiPaaS: Hours to days
- Custom logic
- DeveloperLook: Any rule you neediPaaS: Limited by the builder
- Running cost
- DeveloperLook: Hosting onlyiPaaS: Priced by usage
- Error handling
- DeveloperLook: Queues, retries, alertsiPaaS: Basic retries and emails
- Data path
- DeveloperLook: Direct between your systemsiPaaS: Through the vendor's servers
- Code ownership
- DeveloperLook: Your code and docsiPaaS: Workflows on their platform
- Best for
- DeveloperLook: Volume, custom rules, controliPaaS: Simple, low-volume flows
Projects We've Built
SaaS and Web Projects We Have Built
SaaS platforms and websites we've designed and built. Integration work uses the same habits: clear data models, careful API work, and testing before launch.
Finance SaaS Web Design & Development
- Finance
- SaaS Platform
- Website
Cognify Website Design & Development
- Technology
- Website
Saas Web Design & Development
- Technology
- SaaS Platform
- Website
NextEdge Startup Web Design & Development
- Startups
- Technology
- Website
What Our Clients Say
What Clients Say After Launch
Feedback from teams we have built websites, SaaS products, and integrations for.
We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
What I appreciate most is that the website is actually easy for us to manage now. We can update content ourselves instead of sending a developer a message every time we need to change something small. They also paid attention to the technical SEO side, which mattered to us because we didn’t want a new website to create problems for the traffic we already had. I’ve probably asked more questions than I should have since launch, but every question has been handled patiently and without any fuss. The team is easy to work with, they explain things clearly, and when we need something changed, they focus on getting it done rather than making the process complicated.
1,000+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
Work Culture
Why Operations Teams Trust Us With Their Integrations
An integration that fails quietly is worse than none, so every build is designed around failure first. These habits go into each one.
Webhooks answered, then queued
Shopify retries a failed webhook up to 8 times in 4 hours, then removes the subscription, per its docs. We acknowledge fast and process in a queue, so your events keep flowing.
Retries that don't double-charge
Stripe returns the saved result when a request reuses an idempotency key, per Stripe's docs. We send these keys wherever an API supports them, so a retried payment call doesn't charge twice.
Built on current API versions
Shopify's REST Admin API became legacy in October 2024, per Shopify's developer docs. We build new work on supported versions, so your integration isn't a rewrite waiting to happen.
Every failure has an owner
Failed records land in your log with the reason and alert a named person, not a shared inbox. You see what broke, why, and when it was fixed.
iPaaS checked first
If Zapier, Make, or a native connector covers your flow, you'll hear that on the first call. Custom code is for the volume, rules, or control those tools can't give.
You own every integration
The code, credentials, and documentation live in your accounts. A new developer can pick it up from the runbook without calling us.
Overview
What are custom API integration services?
DeveloperLook builds custom API integration services that connect your store, CRM, ERP, payments, and internal tools through REST, GraphQL, or webhooks. Each build includes a data map, retries paced to each API's rate limits, logging, and failure alerts. Projects start at $1,200 and run 2 to 12 weeks, with the code in your own accounts.
DEVELOPERLOOK
Project facts · API Integration Services
- Service
- API Integration Services (data mapping, connectors, retries, monitoring)
- Typical timeline
- 2 to 3 weeks for one integration, 4 to 12 for larger builds
- Platforms
- Shopify, Stripe, HubSpot, Salesforce, QuickBooks, and any system with an API
- Built with
- REST, GraphQL, webhooks, OAuth 2.0, Node.js, and PostgreSQL
- Experience
- 10+ years of development experience and 1,000+ shipped projects
- Post-launch support
- 30 to 90 days, depending on plan
- Communication
- Calls in US, UK, and AU business hours
- Starting price
- From $1,200 USD, fixed scope after a free systems review
Reviewed 30 Sep 2026 by Saimul Islam
Good fit
Teams retyping data between systems
Your staff copy orders, leads, or invoices from one system into another every day, and typos turn into refunds and awkward calls.
Businesses outgrowing Zapier or Make
Your automations hit usage limits, fail with vague errors, or cost more each month than a one-time custom API integration development project.
Stores syncing orders to back-office tools
Your store's orders, stock, and refunds need to reach your ERP, 3PL, or accounting system without anyone exporting a CSV.
Teams with security or compliance rules
Your data can't pass through a third party's servers, so you need a direct connection with scoped access and full logs.
Agencies with integration requests
Your agency's client needs systems connected, and you want the integration built, tested, and documented under your brand.
Not a fit
Simple low-volume flow
Your flow is simple and low-volume, such as new form entries going to a spreadsheet. Zapier or Make handles that for less than our $1,200 start.
Store orders and stock
You need orders, inventory, or fulfillment synced for an online store. Our Ecommerce Integration & Automation service is scoped for that.
A packaged connection
You need one connection we already package, such as Shopify to Xero or TikTok Shop. Those service pages are scoped and priced for it.
Public API for your product
You want a public API built for your own product. Our API Solutions page covers designing and building APIs for partners and customers.
Not sure we're the right fit?
Send a two-line brief. We'll tell you honestly whether we're the right team.
Pricing
Transparent Starting Prices for Custom API Integration
These are starting points in USD. Your final price depends on the number of systems, data volume, and API quality, and you get a fixed proposal after a free systems review.
For one reliable connection between 2 systems, one-way or two-way.
$1,200one-time, USD
- Free systems review and data map
- One sync between 2 systems
- Retries paced to each API's limits
- Logging and failure alerts
- Tests with real data before launch
- 30 days of support
Recommended
For workflows that move data across up to 4 systems with custom rules.
$3,200one-time, USD
- Everything in Single Integration
- Up to 4 connected systems
- Webhooks with a queue and retry worker
- Custom data transformation rules
- Monitoring view and full documentation
- 60 days of support
For teams that need a middleware layer between many systems and partners.
$7,500one-time, USD
- Everything in Multi-System Integration
- Custom middleware layer between your systems
- OAuth 2.0 and scoped access for partners
- OpenAPI documentation and versioning
- Load and security testing
- 90 days of support
For Agencies
White-Label API Integrations for Agencies and Studios
You own the client relationship. We supply the integration work behind it: field mapping, connectors, error handling, and documentation. Your client sees your brand, and your team gets a runbook to support them.
How the partnership works
White label: your client only ever sees your brand
- Your client
- You, the agency
- DeveloperLook
Share the client brief
Send the client's systems, the data to move, and any API documentation.
- Client needs
- You share the details
- Details received
We scope and propose
You get a written scope, a timeline, and a fixed price.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
Build and hand off
We build, test with real data, and document it under your brand.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
Stay client-facing
We work under your brand, so you keep the client and the revenue.
Predictable delivery
A fixed price and a data map the client approves first.
Failures caught early
Every build ships with logging and alerts, so issues reach you first.
Documented for reuse
A runbook and field list your team can support after handover.
The Right Technology for Your Project
Technology Stack
We build on each system's official API with tools your next developer will know: Node.js or Python, PostgreSQL, and managed queues.
Shopify
Stripe
HubSpot
Salesforce
QuickBooks
Slack
OpenAPI
GraphQL
gRPC
OWASP
Node.js
Python
TypeScript
PHP
AWS
PostgreSQL
Docker
Cloudflare
FAQ
Frequently Asked Questions
Straight answers on REST and webhooks, iPaaS tools, cost, timelines, security, and support.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
Most integrations use REST for reading and writing records and webhooks for change events as they happen. GraphQL fits when a system offers it and you need specific fields in one call. Your choice depends on what each API supports and how fresh your data must be.
An iPaaS tool like Zapier or Make is better for simple, low-volume flows your team can edit itself. Custom integration wins once you need high volume, complex rules, data that stays off third-party servers, or monthly fees start outgrowing a one-time build. We'll say which fits before quoting.
Pricing starts at $1,200 for one connection between 2 systems, with retries, logging, and alerts. Up to 4 systems with webhooks, queues, and custom rules costs $3,200, and a middleware layer starts at $7,500. Third-party API fees are separate, and your quote is fixed once we've reviewed your systems.
A single integration takes 2 to 3 weeks, and a multi-system project takes 4 to 6 weeks. A middleware layer takes 8 to 12 weeks. Poor API documentation or slow partner approvals can add time, so we check both in the free review before quoting.
Your integration gets a queue that paces calls to each API's published limits and retries temporary errors with growing delays. A 429 response means slow down, so the queue waits instead of hammering the API. Records that still fail go to a log and alert a named person on your team.
Your integration uses OAuth 2.0 or scoped API keys, secrets stay in a secrets manager, and every connection is encrypted. Each credential gets only the permissions its job needs. Incoming webhooks are verified by signature, such as Shopify's HMAC header, so forged requests get rejected before they touch your data.
Any system with an API, webhooks, a database, or file exports can be integrated. Common ones are Shopify, Stripe, HubSpot, Salesforce, NetSuite, QuickBooks, Slack, and shipping carriers. Older systems without an API can often connect through scheduled file exports over SFTP. We confirm access in the free review.
Yes, when an integration needs them, such as a webhook receiver or a small API your partners call. Those endpoints get authentication, versioning, and OpenAPI documentation. If you need a full public API for your product, our API Solutions page covers that larger build, with its own pricing.
Yes, we find the root cause of your failing integration first: expired tokens, changed fields, rate limits, or duplicate events. We read your logs, reproduce the failure in a test account, and fix it. Then we add the logging and alerts that should have caught it, so the next failure gets caught early.
Your plan covers 30 to 90 days of support: failed records, fixes, and API version changes on either side. After that, your team can maintain it from the runbook, or we quote ongoing support. The code and documentation stay in your accounts, so you can switch developers without starting over.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
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