Custom software development

Software built to your spec.
Your team owns it forever.

Off-the-shelf software was built for someone else's business. We design, build, and ship custom systems that fit your exact workflows. Your engineers receive full source code, full IP, and full documentation on delivery.

94+ systems shipped100% IP and code transferred90-day post-launch support, not an upsell
Client result
14M
Annual revenue, up from $14M
Parsons Kellogg · custom ecommerce platform
30+
Stores unified on one platform
1M+
Inventory items synced via application programming interfaces
Engineering lead reviewing custom software architecture on dual monitors in collaborative workspace
The decision most operations leaders face

Off-the-shelf software owns your workflows. Your own platform puts you back in control.

CTOs, founders, and operations directors at growing companies hit the same wall. These are the two paths. Click to see both.

Patching tools that do not connect
Your team exports from one platform, imports into another, and reconciles the gap by hand. Every new tool adds another failure point.
Vendor pricing you cannot escape
Per-seat fees, licensing tiers, and feature paywalls mean every new hire or every growth milestone costs more. You cannot scale without a proportional spend spike.
Your roadmap is stuck in their backlog
The feature your operation needs is on the vendor's public roadmap for next year. Or it was removed quietly. Either way, you wait.
No visibility into your own data
Your operational data lives across five platforms. None of them expose it in a format your team can actually use without a data engineering project.
Brittle integrations at every growth point
Your ERP, CRM, and storefront were never designed to operate together under load. Something breaks every quarter, and the fix is always a patch on a patch.
Handoff with zero documentation
The agency exits and your engineers inherit a codebase nobody documented. Extending or maintaining it means hiring the original team back or starting over.
One platform built around your workflows
Every integration, data model, and user flow is designed around how your business actually works, not a generic template.
Cost structure you control permanently
A one-time build cost replaces recurring license fees. Infrastructure scales with your usage without vendor markup.
Your roadmap ships on your timeline
Every feature on your roadmap is a build decision, not a vendor request. You decide what ships next and when it ships.
Full data ownership, zero dependency
Your data sits in infrastructure you own. No export restrictions, no rate limits, no risk of a vendor changing terms and cutting your access.
Integrations designed to hold under load
Every external system connection is contract-tested and load-tested before it touches production. Failures surface in staging, not on your busiest day.
Full documentation from day one
API docs, architecture diagrams, runbooks, and a recorded technical walkthrough. Your engineers can maintain and extend the system without us.
Operations manager dealing with multiple fragmented software tools open on desktop
How we build custom software

Signed brief to production-ready system in 10 to 16 weeks.

Each phase ends with a document you review and approve before the next one begins. You see working software every week, not project management updates.

1
Weeks 1 to 2
Technical discovery and scoping
We map your existing systems, flag every integration risk, and write a scope document with line-by-line pricing. You review and approve it before any code starts.
2
Weeks 3 to 4
Architecture and system design
We design the data model, API contracts, and infrastructure blueprint. You sign off on the architecture before Sprint 1. No scope creep enters the build.
3
Weeks 5 to 11
Sprint build with weekly demos
Two-week sprints, weekly staging demos. You see real working software every week. Not updates. Not decks. Working software.
4
Weeks 12 to 13
QA and integration testing
847 automated tests, 94% code coverage, load-tested at 2x projected peak. Every risk flagged in discovery is resolved before staging sign-off.
5
Weeks 14 to 16
Launch, handoff, and 90-day support
Staged rollout, on-call team for the first 48 hours, full docs package, and 90 days of post-launch support written into the contract.
Technical Scope Brief: Redefine
14
Risk items logged
3
Stack options evaluated
12w
Delivery estimate
Scope confirmed
Headless storefront (Next.js)Confirmed
Node.js application programming interface layerConfirmed
Enterprise resource planning sync: Dynamics 365In review
Auth/SSO integrationPlanned
Risk register (top items)
Enterprise resource planning data migration volumeMedium
Legacy application programming interface rate limitsMedium
Timeline to first sprintLow
System Architecture: v1.2
Frontend layer
Next.js+CDN (Cloudflare)+SSR / ISR
Application programming interface and services layer
Node.js APIAuth (JWT)+Redis Cache
Data and integration layer
PostgreSQLERP SyncDynamics 365
Payments API+Shipping API+Analytics
Architecture sign-off required before Sprint 1 begins
Sprint 4: Active Board
78%
Sprint velocity
8
Stories done
3
In review
In Progress2
ERP order sync v2
CSD-041
Cart API endpoint
CSD-042
Review3
Auth middleware
CSD-038
Product feed API
CSD-039
Search filters
CSD-040
Done8
DB schema v3
CSD-030
SSO integration
CSD-031
Redis caching
CSD-032
QA Report: Pre-Staging
847
Tests passing
94%
Code coverage
0
Critical failures
Integration tests
Enterprise resource planning sync (order flow)Passing: 2min latency
Payment gateway hooksPassing
Auth / SSO roundtripPassing
Shipping rate APIPassing
Load test (p95 latency)
Homepage render188ms
Product detail page214ms
Cart checkout flow312ms
Go-Live Checklist: Week 14
LIVE
Production status
90d
Support active
0
Post-launch incidents
Launch checklist
DNS configured and SSL active
Performance baseline captured
Enterprise resource planning sync confirmed on production
48-hour on-call team briefed
Runbook and docs package delivered
Code ownership transferred to client
What every project includes

What you receive. Defined before we start.

Every deliverable is tied to a business outcome you can measure and verify. Architecture, code, documentation, and 90-day support are standard on every project.

Deliverable 01
A written scope document before Sprint 1 begins.

The first two weeks produce a scope document your team reviews and approves. You receive line-by-line pricing, a risk register, a stack recommendation with rationale, and a sprint-level delivery calendar. Nothing ambiguous enters the build.

  • Technical scope document with line-by-line deliverables
  • Integration risk register with mitigations mapped
  • Stack decision with rationale and tradeoffs explained
  • Sprint-level delivery calendar, published pre-kickoff
See Engagement Models
Two engineers reviewing printed technical architecture brief at meeting table
Deliverable 02
Integrations built as first-class engineering, not afterthoughts.

Every external system is mapped, mocked, and contract-tested before it touches production. We shipped five live integrations on a single B2B platform in one launch. Dynamics 365, SAP, Salesforce, Stripe, and custom ERPs are in our track record.

  • API contracts written and agreed before build begins
  • End-to-end integration tests, not just unit tests
  • Load-tested at 2x projected peak before go-live
  • Integration runbook delivered with every project
View All Development Services
Developer reviewing application programming interface integration architecture diagram at workstation with screen glow
Deliverable 03
Full code ownership. Full documentation. Yours on delivery.

On delivery you receive the full source code repository, API documentation, architecture diagrams, a recorded technical walkthrough, and an ops runbook. Your engineers can maintain and extend the system without contacting us.

  • Full IP and source code transfer on delivery date
  • Recorded technical walkthrough for your engineering team
  • Ops runbook and escalation guide included
  • 90 days of post-launch support included in every contract
View Support and Maintenance
Delivery package
Full source code repository
Application programming interface docs and architecture diagrams
Recorded technical walkthrough
Ops runbook and escalation guide
90-day post-launch support window
Every project. Included. Not upsold.
Technology and stack

Built on the stack your engineers will actually inherit

We recommend technology based on your scale, integration surface, and the team that maintains the system after delivery. Every stack decision is documented with rationale in the scope brief.

Frontend
Performance-first frameworks your team can hire for
Backend
API layers, background jobs, and services
Data
Databases, caching, and search
Cloud
AWS, GCP, Azure with CI/CD from day one
Integrations
ERP, CRM, payments, and custom APIs
Frontend frameworks

We default to Next.js for performance, server-side rendering, and hiring availability. React, Vue, and Angular are available when your existing codebase requires it. We choose the framework based on your traffic profile, SEO requirements, and the engineers your team can realistically hire to maintain it.

Next.jsReactVue.jsAngularTailwind CSSTypeScript
When we use each
Next.js
Default for ecommerce, software-as-a-service, and content-heavy platforms requiring server-side rendering and incremental static regeneration.
React (SPA)
Admin tools, dashboards, and internal applications where search engine optimization is not a factor.
Vue / Angular
Existing codebase continuity or team preference when the ecosystem supports the scope.
Backend and application programming interface

Node.js is our primary backend for real-time data and API-heavy platforms. Python handles data pipelines. .NET and PHP are available for extending existing enterprise systems. Every backend recommendation includes rationale in the scope brief.

Node.jsPython.NET CorePHP / LaravelGraphQLREST APIs
Stack recommendation criteria
We recommend the backend based on your throughput requirements, existing data format, integration surface, and the engineering team who will maintain the system after handoff. Rationale is documented in the scoping brief.
Data and storage

PostgreSQL is our default for transactional systems with complex data models. MongoDB for flexible schema and document-oriented workflows. Redis for caching. Elasticsearch for search-heavy platforms. Every data architecture decision is documented in the scope brief.

PostgreSQLMongoDBRedisMySQLElasticsearchFirestore
Data migration policy
All data migrations include a rollback plan, a dry-run validation pass, and a post-migration integrity report. We have migrated 1M+ record datasets with zero data loss incidents.
Cloud and infrastructure

AWS, GCP, and Azure are all production-grade on our builds. We default to the cloud your team already operates in. Every project includes a CI/CD pipeline, environment separation (dev, staging, production), infrastructure-as-code, and a monitoring stack from day one.

AWSGCPAzureGitHub ActionsDockerTerraform
What is always included
CI/CD pipeline, dev/staging/production environments, infrastructure-as-code, alerting, monitoring configuration, and a runbook for your ops team are standard on every project.
Enterprise integrations

Integration work is the highest-risk part of most custom builds. We treat it as a first-class engineering discipline. Every integration is contract-tested against a mock before the real endpoint is wired, so failures surface in staging, not production.

Dynamics 365SAPSalesforceStripeKlaviyoCustom ERPs
Integration track record
We shipped 5 live integrations on a single business-to-business platform launch. Zero critical integration failures in the first 90 days post-launch. All 14 risk items flagged in discovery were resolved before go-live.
Client result

$14M to $120M annual revenue. Same platform. Six years. Zero rebuilds.

Parsons Kellogg needed one system to unify 30 stores, 1 million inventory items, and five backend platforms. The custom platform we built handled their first year and their sixth.

14M
Annual revenue, up from $14M on legacy stack
0
Stores unified in a single custom ecommerce platform
0
Inventory items synced via custom application programming interfaces and enterprise resource planning integration
The organization

Parsons Kellogg provides promotional products, corporate apparel, and branded merchandise across a large multi-store ecommerce footprint.

B2B EcommercePromotional Products
The problem

Parsons Kellogg ran 30 separate storefronts with no unified visibility. Inventory reconciliation was manual. Backend integrations broke under seasonal load. Growth was capped by the tools, not the market.

The result
$120M
annual revenue on custom platform
A custom ecommerce platform unified all 30 stores into one real-time system. Custom API automation synced 1M+ inventory items across five backend platforms. Power BI dashboards gave the operations team live visibility for the first time.
Enterprise operations team reviewing live ecommerce performance dashboard after custom software launch

The platform gave us real-time visibility across all 30 stores for the first time. Before, we were operating blind. The architecture has supported our growth from $14 million to $120 million without us needing to rebuild anything. We haven't needed to touch the architecture since launch. It scales with us.

Operations Lead, Parsons Kellogg
Multi-Store Ecommerce Platform · Promotional Products
Custom build
$45K to $150K
Scoped before work starts. Fixed-phase pricing with sprint calendar.
Enterprise platform
$150K to $500K
Multi-system integrations, enterprise resource planning, custom data architecture, full docs.
How we price
Scoped first
Line-by-line pricing. No commitment to receive a proposal. See pricing guide.
Why CTOs and founders choose Redefine

Three commitments most agencies leave in the fine print.

The typical agency gives you estimates, a timeline, and hope. We give you scope documents, signed architecture, and post-launch support written into the contract before Sprint 1.

01
Scoped in writing before work starts.

Most agencies start building on assumptions. We spend the first two weeks producing a scope document, a risk register, a stack recommendation, and a sprint calendar. You review and approve before any code is written. You can take the scope document elsewhere. No commitment required.

See How We Price
02
You own the code. No access fees. No lock-in. Ever.

Full source code, full IP, and full documentation transfer to you on delivery. You do not pay an ongoing fee to access your own system. You can hire any engineer to extend it. You never need to call us again unless you want to.

View Engagement Models
03
90 days of post-launch support. On-call for the first 48 hours.

Bug fixes, monitoring, incident response, and rollback coverage are included in every contract for 90 days after launch. We are reachable the first 48 hours after go-live, not just available.

View Support Details
Questions buyers ask before signing

What CTOs and founders ask before they engage.

Most custom software builds run 10 to 16 weeks from signed brief to production. MVPs run 8 to 12 weeks. Enterprise platforms with deep integrations run 16 to 24 weeks. Every engagement starts with a two-week technical discovery that produces a sprint calendar before code begins.

Technical discovery produces a scoped brief, a risk register, a stack recommendation, a data model outline, and a sprint-level delivery calendar. It takes two weeks and requires roughly four hours from your team. No commitment is required to receive the discovery output. See our pricing methodology.

You do. Full source code, documentation, and intellectual property transfer to you on delivery. We do not retain licensing rights, lock you into proprietary tooling, or require ongoing contracts to access your own system.

Custom software builds typically run between $45,000 and $500,000 depending on scope, integration complexity, and timeline. We scope before we quote. Every proposal includes line-by-line pricing. No commitment is required to receive a proposal. See our full pricing guide.

Yes. We regularly inherit, document, and extend existing systems. The engagement starts with a technical audit that maps the current state, identifies risks, and produces a phased modernization plan before new code is written. See our migration and modernization practice.

Start your scoped proposal

Tell us what you are building.

Fill in your brief and we respond within 48 hours. You receive a scoped proposal in 3 days with no obligation to proceed.

Form

Every proposal includes line-by-line pricing, a risk register, and a sprint calendar. No commitment required to receive it.

48 hours
Response time
3 days
Scoped proposal
94+
Systems shipped
100%
You own the code

We take a limited number of new discovery engagements each month. Submitting a brief reserves your scoping slot.

Brief received.

Brief received, we will review your workflow and send a scoped proposal within 3 business days.

Get on a call with us to see how we can help you

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