Custom software development agency

Custom Software Development Company.
Built for Your Stack.

No off-shelf product survives contact with your actual business logic. As a custom software development company, we design, build, and ship production-ready custom systems that your team owns, understands, and can extend without us.

94+ systems shipped100% code ownership transferred90-day post-launch support included
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 custom software trade-off

Off-shelf software owns your workflows. Custom software is built around them.

Click between the two realities most chief technology officers face. The gap is exactly why teams commission custom builds.

Patching tools that do not connect
Your team exports from one platform, imports into another, and reconciles by hand. Every new integration adds another failure point.
Vendor pricing you cannot escape
Licensing tiers, per-seat markups, and feature paywalls limit how fast you can scale without a proportional cost spike.
Your roadmap is stuck in their backlog
The feature your operation needs ships for everyone in 18 months, or never, because the vendor has different priorities.
No visibility into your own data
Operational data lives across five platforms, none of which expose it in the format your analytics team actually needs.
Brittle integrations at every growth point
Enterprise resource planning, customer relationship management, and storefront were never designed to operate together at scale. Something breaks each quarter.
Handoff with zero documentation
When the agency exits, your team inherits a codebase nobody understands and a system nobody can safely extend.
One platform built around your workflows
Every integration, data model, and workflow is designed for how your business actually operates, not a generic use case.
Cost structure you control permanently
A one-time build cost replaces recurring license fees. As usage grows, infrastructure scales predictably without vendor markups.
Your roadmap ships on your timeline
Every feature on your roadmap is a build decision, not a vendor request. You control what ships next and when.
Full data ownership, zero dependency
Your data sits in infrastructure you own. No export restrictions, no application programming interface rate limits, no terms-of-service risk.
Integrations designed to hold under load
Every external system connection is contract-tested, load-tested, and documented before it touches production.
Full documentation from day one
Application programming interface docs, architecture diagrams, runbooks, and a recorded technical walkthrough. Your team owns and understands the code.
Operations manager dealing with multiple fragmented software tools open on desktop
Our custom software development process

From signed brief to production-ready software in 10 to 16 weeks.

Every phase has a defined output you review before the next one begins. Nothing ambiguous enters a sprint.

1
Weeks 1 to 2
Technical discovery and scoping
We read your systems, map every dependency, and flag every risk before committing to a timeline.
2
Weeks 3 to 4
Architecture and system design
Data models, application programming interface contracts, integration specs, and infrastructure blueprint. All signed off before code starts.
3
Weeks 5 to 11
Sprint build with weekly demos
Two-week sprints. You see working software in staging each week, not status updates.
4
Weeks 12 to 13
Quality assurance and integration testing
End-to-end tests, load tests, and every risk item from discovery resolved before staging sign-off.
5
Weeks 14 to 16
Deployment, handoff, and 90-day support
Phased rollout, on-call coverage, full docs package, and 90 days of post-launch support included.
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
Custom software development deliverables

What you receive. Not what we do.

Every deliverable is tied to an outcome your business can measure. Architecture, code, docs, and support are the baseline.

Deliverable 01
Scoped architecture before your first sprint. In writing.

Every engagement starts with a two-week technical discovery. You receive a scope document, a risk register, a stack recommendation, and a sprint calendar before a single line of code is written.

  • 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
Integration-first architecture. Never an afterthought.

Every external system, from enterprise resource planning to payments to analytics, is mapped, mocked, and contract-tested before it goes into production. We have connected Node.js platforms to Dynamics 365, custom enterprise resource planning systems, and five simultaneous third-party systems in a single launch.

  • Application programming interface 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
Code ownership. Full documentation. Yours from day one.

On delivery you receive full source code, application programming interface documentation, architecture diagrams, a recorded technical walkthrough, and an ops runbook. Your engineers can maintain, extend, and hand off the system without us.

  • Full intellectual property and source code transfer on delivery
  • Recorded technical walkthrough for your engineering team
  • Ops runbook and escalation guide included
  • 90 days post-launch support, not an upsell
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 integrations

Built on the stack your engineers will inherit

We recommend the stack based on your scale requirements, integration surface, and the team that will maintain it. Click a layer to see what we use.

Frontend
Performance-first, server-side rendering-capable frameworks
Backend
Application programming interface layers, microservices, background jobs
Data
Relational, document, caching, search
Cloud
Scalable infrastructure with CI/CD pipelines
Integrations
Enterprise resource planning, customer relationship management, payments, analytics, and application programming interfaces
Frontend frameworks

We default to Next.js for performance, server-side rendering flexibility, and the ecosystem your team will find engineers for. React, Vue, and Angular are available when your existing codebase requires it. We size the framework to your traffic profile and team's maintenance capability.

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 choice for real-time data, event-driven systems, and application programming interface-heavy platforms. Python is used for data pipelines and machine learning inference. .NET and PHP are available for greenfield or for extending existing enterprise systems.

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. Parsons Kellogg case study

$14M to $90M annual revenue on a Redefine custom platform.

Parsons Kellogg needed a single platform to unify 30 stores, 1 million inventory items, and multiple backend systems. We built one that could handle it.

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

Existing systems lacked unified visibility across 30 stores, over one million inventory items, and multiple backend platforms. Manual processes and fragmented integrations constrained growth.

The result
$90M
annual revenue on custom platform
Custom Power BI dashboards, a custom ecommerce platform, and backend application programming interface automation unified all 30 stores and 1M+ inventory items into a single real-time system.
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 $90 million without us needing to rebuild anything.

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.
Process signal
Scoped first
Line-by-line pricing. No commitment to receive a proposal. See pricing guide.
Why teams choose Redefine for custom software development

Three commitments the average custom software development agency leaves vague.

The typical agency gives you estimates. We give you scope documents, signed-off architecture, and post-launch support written into the contract.

Commitment 01
We scope it in writing before charging a cent.

Every engagement starts with a two-week technical discovery. You receive a full scope document with fixed-phase pricing, stack recommendation, sprint calendar, and integration risk register. No commitment required to receive it.

See How We Price
Commitment 02
The code is yours. The docs are yours. Forever.

Full intellectual property and source code transfer on delivery. No licensing, no proprietary tooling lock-in, no ongoing access fee to run your own system. We design for independence from day one.

View Engagement Models
Commitment 03
90 days of post-launch support. In the contract.

Bug fixes, incident response, monitoring coverage, and rollback support for 90 days after go-live are included in every project. We are on-call for the first 48 hours after launch.

View Support Details
Common questions

What chief technology officers 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 $250,000 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.

Is this the right engagement for you?

We are honest about fit before you hire custom software development.

Custom software is the right answer for specific problems. If yours is not one of them, we will tell you before you engage.

Good fit
  • You need to do something no off-shelf product supports without heavy workarounds
  • You are scaling past the limits of your current software-as-a-service stack and hitting integration walls
  • You need deep enterprise resource planning, customer relationship management, or application programming interface integration as a core part of the product, not an add-on
  • You want full code ownership and the ability to extend the system without returning to an agency
  • You have an internal technical stakeholder who can engage during scoping
  • Your roadmap requires features that vendor platforms will not prioritize on your timeline
Not a fit
  • You need a marketing website or a simple Shopify or WordPress build with no custom logic
  • You want the fastest possible time to a demo without a scoping phase
  • Your budget is under $25,000 total for a production-ready system
  • There is no internal technical context and nobody on your team will review architecture decisions
  • You are looking for a vendor who will own and operate the system indefinitely after delivery

Not sure which describes your situation? Tell us what you are building and we will be straight with you.

Book a technical strategy call

Tell us what you are building.

We review every brief and respond within two business days. No commitment. No pitch.

Form
48 hours
Response time
3 days
Proposal timeline
94+
Systems shipped
100%
You own the code
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

Get a Quote