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Back-end development:
the engine room, built to last.

The part of your app nobody sees decides everything users feel: data, logins, payments, background jobs. Senior engineers build it sized to your real load and secure from the first sprint. 4,500+ projects delivered since 2004.

Architecture reasoned in writing · Clear IP & Ownership Terms

  • Hello Peter
  • Gruber Logistics
  • Delhivery
  • Thomson Reuters
  • Qatar Airways
  • Grundfos
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  • BERD
  • Yale University
  • Kuwait Police
  • Dubai Police
  • Panasonic
  • Infosys
  • Kia
  • Hitachi
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In one answer

PixelCrayons provides back-end development services: the data models, APIs, auth and background jobs your application runs on. Architecture is sized to your actual load (one well-built application before a fleet of small services, and we'll say so in writing); security is engineered in from the first sprint, and every merge passes senior review. IP and ownership terms are agreed before work starts. Direct for brands, white-label for agencies.

  • Reply within four business hours (typical)
  • Architecture sized to your load: one application before many services
  • Senior review on every merge
  • Security engineered in from sprint one
  • 4,500+ projects delivered since 2004
  • Clear IP & Ownership Terms
In every back end

What the engine room
actually includes.

01

The data model, designed before the endpoints

The data model outlives every framework choice, so it comes first. Entities, relationships and constraints are agreed in plain English before code. Schema changes are written and reviewed like any other change. A back end built on a considered data model stays extendable for years. One built endpoint-first calcifies in months.

Sprint zero
02

Application APIs, typed and documented

The contracts between your back end and its clients (web front end, internal tools, partner systems) are documented as they're built. Every field's shape and version is written down, REST or GraphQL as the case argues. Your own team can build against them without asking us what a field means.

Every build
03

Auth and security as engineering, not a checkbox

Authentication and authorisation are built on proven libraries rather than home-rolled crypto. Least-privilege access, secrets kept out of code, dependencies scanned in CI and OWASP risks treated as review criteria on every merge. Security here is a property of how the system is built, week after week, not an audit purchased at the end.

Every merge
04

Background jobs and real reliability

This is the unglamorous work that separates a demo from a production system. Queues and scheduled jobs that retry safely without repeating themselves. Records that stay consistent where money moves. Error tracking and logs your operators can actually read. Backup-and-restore paths get rehearsed rather than assumed to work.

Every build
05

Architecture sized to your load, and handed over

We size architecture to your measured load and growth, not to conference talks. For most businesses that means one well-structured application that one team can operate. It gets split into separate services only when the evidence demands it. Architecture notes, runbooks and the reasoning are handed over in writing, with the repository in your accounts from day one.

In writing
The operating record

Judge the record,
not the adjectives.

Outcomes tied to real engagements, not averages.

2004
Established
500+
Agencies served
4,500+
Projects delivered
340%
Revenue growth · 7 months
Client outcome: eCommerce
+127%
Organic traffic · 5 months
Client outcome: SaaS
85%
Faster delivery · backlog cleared
Client outcome: via agency partner
Where the work happens
ShopifyWooCommerceMagentoWordPressWebflowKlaviyoGoogle AdsMeta AdsGA4Next.js
The process

From domain walk
to endpoints on staging.

01
Days 1 to 2

NDA signed, domain walked

We sign the NDA and walk your domain together: the records, rules and loads that actually exist. Existing code if there is any, and who operates the system after launch.

02
Complete brief

Proposal, architecture reasoned

Once we have a complete brief, we confirm the date you will receive your itemised proposal: a priced scope with the recommended architecture and the reasoning, including, where it's true, 'you don't need microservices for this'.

03
Week 1

Data model agreed, repo live

Schema and API boundaries settled, repository and CI standing in your accounts, environments and secrets handling set up properly from the start.

04
First delivery

First endpoints on staging

Working, tested endpoints demoed on a call: real requests against a real data model, not an architecture diagram about progress.

Inside Prism

Your engagement, week to week,
in one workspace.

Where the engagement includes it, your build runs in a Prism workspace you log into: requests, approvals, the task list and the weekly review, beside the repository your team already owns.

  • 01

    Requests and approvals

    One queue, beside the repository your team owns.

  • 02

    Owned tasks

    Every task has one owner and a date.

  • 03

    Weekly review

    Each decision recorded, with the expectation attached.

Proof

A queue cleared,
a cadence kept.

Delivery team coordinating a multi-location healthcare website rollout
Healthcare · US
Via agency partner · white-label

Multi-location healthcare: delivery unblocked.

An agency drowning in backlog handed us their delivery queue. Dedicated pod, their brand, their tools: velocity up 85%.

85%
Faster delivery
Cleared
Delivery backlog
Read the full case
The rest of the system

The core, connected
to everything around it.

A back end never runs alone: every discipline it touches is a service you can buy on its own, from the same accountable team.

Building the whole application, not just the core?

This page covers your application's engine room. If the brief is the full build (interface, core and the architecture between) that's custom web development. Adding engineers to your own team instead? Hire Node.js, Django or Laravel developers by the month.

Before you sign

Our commitments

Each one says where it applies and links to its full terms.

Response and start times

We typically respond within four business hours. Eligible engagements can typically start within two to three business days after scope, payment and required access are confirmed.

Business hours are Monday to Friday, 9:00 am to 6:00 pm IST, excluding published company holidays. Typical expectations, not guaranteed service levels.

Full terms

30-Day Corrective Maintenance

Applicable development work includes 30 days of corrective maintenance after production launch.

Development engagements only; not marketing services or retainers.

Full terms

Clear IP & Ownership Terms

Your materials remain yours. Bespoke deliverable rights, licences and handover are agreed before work starts.

All engagements.

Full terms

Clear Delivery & Escalation Ownership

Know who coordinates your engagement, who owns the work and how to escalate an issue.

All engagements. Roles may be combined and vary with your engagement.

Full terms

Questions buyers ask before they commit

How do we know the work will be good?

Every delivery is reviewed before release by QA, your Project or Account Manager and a senior delivery lead, and you then review it against the acceptance criteria agreed at the start. Our specialists use AI to support delivery, with people responsible for reviewing the work. Applicable development work includes 30 days of corrective maintenance after production launch.

Who owns the ad accounts, the data and the work?

Your materials, data and accounts remain yours, and we prefer to work in advertising and analytics accounts you own, with access delegated to our team. Agreed ownership rights in bespoke deliverables transfer under the engagement terms and applicable payment; third-party software and assets keep their licences. We do not withhold customer-owned data or accounts over a payment dispute.

What if we want to stop?

Cancellation, notice and any renewal terms are written into your proposal or statement of work before you accept it. If an engagement ends early, we hand over completed, paid-for work and list any unfinished work separately. For an eligible specialist trial, you can stop within the trial window and pay nothing for eligible trial hours.

How will we know what you are doing?

Before work starts we agree how often you get updates, what the reports cover and who sends them. You know who coordinates your engagement, who owns the work and how to escalate an issue. For hourly and retainer work, time is recorded in Workstatus, so you can see the time records behind your invoice.

How we handle claims, credentials and your data: group credentials, dated ratings, how case figures are signed off, client permissions and data handling.

Questions

Frequently
asked.

Backend web development is the part of your application users never see: the data model, the application APIs, authentication and the background jobs. We size it to your actual load and build security in from the first sprint. Connecting to other systems, such as CRMs, ERPs and payments, is covered on our API and integrations page.

Probably not, and no honest engineering partner opens with them. Microservices trade code complexity for operational complexity: more deployment surfaces, more failure modes, more infrastructure to staff. That trade pays off at organisational scales most businesses never reach. Our default recommendation is a well-structured monolith (one application, cleanly organised inside), which one team can operate and which can be split later along those boundaries if the evidence ever demands it. If we think you genuinely need services, we'll argue it in writing, from your numbers rather than from fashion.

The stacks most production systems actually run: Node.js and TypeScript, PHP with Laravel, and Python for data-shaped work, on PostgreSQL or MySQL, deployed to the major clouds. The choice is argued from your constraints: what your team can operate and hire for, what you already run. Our bias is deliberately boring: proven tools with deep talent pools beat fashionable ones your next hire has never seen. Where we lack genuine senior depth in a technology, we say so and point you elsewhere rather than learn on your budget.

As an engineering practice, applied continuously, not a certificate bought at the end. Concretely: authentication built on proven libraries, least-privilege access to data and infrastructure, secrets kept out of the codebase, dependencies scanned in CI, OWASP risks treated as explicit review criteria on every merge, and personal data handled to the standard of the regulations that apply to you, such as GDPR. What we won't do is promise 'unhackable' or wave a compliance badge at you. If you need a formal audit or penetration test, we build to make it pass, and work alongside the assessors.

Yes, rescue and takeover work is a steady share of back-end engagements. It starts with a plain audit, not a rewrite pitch: we map the data model, the deployment path and the genuinely risky corners. Then we stabilise before we extend: tests around the critical paths, secrets rotated, backups verified. Most inherited systems are better than the team that inherited them fears, and incremental improvement usually beats the big rewrite that stalls features for a year. When a rewrite genuinely is cheaper, we show the reasoning and let you make the call.

Your materials, data and accounts remain yours. Agreed ownership rights in bespoke deliverables transfer under the engagement terms and applicable payment; third-party software and assets keep their licences. We do not withhold customer-owned data or accounts over a payment dispute. Schema documentation, architecture notes and runbooks are maintained as we build, and credentials live in your vault, not ours. If you leave, you take a system your own team can run; open-source dependencies keep their standard licences, documented in handover.

Yes. Many partner agencies use us as their backend development agency, with the work shipped under their brand: your project tools, your client calls, our engineers behind the scenes. It's NDA-backed. We do not approach the clients you introduce to us for direct business. That protection runs through the work and for twelve months after the last assignment for that client ends, and it is written into the agreement.

Build the part
nobody sees. Properly.

Tell us what your application has to do. You'll have an itemised proposal (architecture, team and timeline, with the reasoning).

Reply within four business hours (typical) · NDA standard · Clear IP & Ownership Terms

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