Custom software development
Custom software built around your business
Create platforms, internal systems and digital products designed around your workflows, customers and long-term goals.
Best fit for companies whose process no off-the-shelf tool matches, and who can commit to a first release plus continued development after it.
- Working languages
- English / Español
- Engagement
- Project, dedicated team or managed monthly
- After launch
- Maintenance under the same agreement
Interfaces
- Customer portal
- Admin dashboard
- Internal tools
Application
- API layer
- Domain services
- Background jobs
Data & integrations
- PostgreSQL
- Object storage
- Third-party APIs
Scoped in writing
Every engagement starts with a written scope, a first release and the assumptions behind both.
Decisions documented
Architecture, data model and trade-offs are recorded while the work happens, not after it.
Supported after launch
Maintenance and continued development are available under the same relationship.
The business problem
Software rarely fails technically. It fails operationally.
Most companies do not need software because they lack a tool. They need it because the tools they have force the business to work in a shape that does not match how it actually operates. Work gets copied between systems by hand, exceptions live in spreadsheets, and the people who understand the workaround become the system.
Manual processes slowing operations
Work that moves between spreadsheets, email and a tool nobody trusts as the record.
Generic software that does not fit
A platform chosen for a category, then bent around a process it was never designed for.
Disconnected systems
The same customer, order or invoice entered more than once because nothing talks to anything.
Products delayed by limited capacity
A roadmap that is clear on paper and stalled in practice because there is no one to build it.
Legacy software that is hard to maintain
A working system nobody wants to touch, because no one can predict what a change will break.
Projects without long-term support
Software delivered, invoiced and abandoned, with no owner for the second year.
MVPs that cannot scale past launch
A prototype promoted to production, carrying every shortcut taken to get it demonstrated.
Outcomes
What custom software is meant to change.
- 01
Process encoded once
The rules your business already follows are written into the system, so they stop depending on who is on shift.
- 02
One record of truth
Customers, orders and operational data live in one place, with integrations keeping the rest in step.
- 03
Capacity without headcount
Steps that consumed hours of coordination run as part of the workflow instead of around it.
- 04
A system that can be changed
Conventional stacks, documented decisions and tests, so the next change is estimable rather than risky.
Scope
What can we build?
The categories below cover most of what businesses ask us for. Real projects usually combine two or three of them.
SaaS products
Multi-tenant products with accounts, roles, billing and a release process you can keep running.
Internal tools
The systems your operation runs on: intake, scheduling, approvals, inventory, fulfilment.
Customer portals
A place for your clients to see status, documents, history and requests without emailing anyone.
Business automation
Rules, triggers and jobs that carry work forward without someone re-typing it.
Marketplaces
Two-sided platforms with matching, communication, transactions and moderation.
Operational dashboards
Live operational views built on your data, not exported spreadsheets.
API ecosystems
Documented APIs that let your systems, partners and products exchange data reliably.
Legacy modernization
Replacing or wrapping an ageing system in stages, without stopping the business.
Capabilities
What is included in a development engagement.
Product engineering
- SaaS development
- MVP development
- Customer portals
- E-commerce platforms
- Ongoing product development
Systems & operations
- Internal business platforms
- Administrative dashboards
- Workflow automation
- Legacy modernization
- Data migration
Integration & platform
- API design and development
- Third-party integrations
- Authentication and roles
- Deployment and environments
- Software maintenance
Fit
Who this service is for.
A good fit when
- An established process is being held together by spreadsheets, email and manual steps.
- An off-the-shelf platform has been evaluated and does not cover the part that matters.
- A product idea has a defined audience and needs a first release that can actually ship.
- An existing system works but is expensive to change, and the cost is now visible.
- There is an internal owner who can answer questions about how the business really works.
Probably not yet when
- The requirement is a standard tool that an existing product already solves well.
- No one internally can commit time to discovery, decisions and review.
- The budget covers a build but nothing beyond launch.
- The goal is a demonstration rather than something the business will operate.
Lifecycle
How a software project runs, end to end.
Each stage produces something you can read, review and disagree with before the next one starts.
Discovery
We map the process as it is actually performed, including the exceptions, and identify what the software has to absorb.
Product definition
Scope is written down: what is in the first release, what is deliberately deferred, and what each decision assumes.
UX/UI
Interfaces are designed against real workflows and reviewed with the people who will use them daily.
Architecture
Stack, data model, environments and integrations are chosen for the team that will maintain them.
Development
Work ships in reviewable increments, in version control, with a changelog you can follow.
Quality assurance
Automated tests cover the rules that matter; manual testing covers the paths people actually take.
Deployment
Release to production with monitoring, environment configuration and handover documentation.
Maintenance and iteration
Fixes, improvements and the next tranche of the roadmap, under an agreed cadence.
Continuity
Built for continuity, not just for delivery.
The difference between software that lasts and software that gets replaced is rarely the code. It is whether the next person can understand it. These practices are part of the engagement, not an upgrade.
Documented decisions
Why a choice was made, and what was rejected, recorded where the next developer will find it.
Maintainable architecture
Conventional patterns over clever ones, so hiring or handover does not become an archaeology project.
Version control and review
Every change traceable to a reason, an author and a review.
Testing
Coverage focused on business rules and the paths that would be expensive to break.
Deployment processes
Repeatable releases with a rollback path, rather than a manual sequence someone remembers.
Knowledge continuity
More than one person understands the system, and the documentation survives staff changes.
- Architecture decision record Written
- Data model and migrations Versioned
- Automated test suite Running per commit
- Staging environment Mirrors production
- Deployment runbook Documented
- Handover session Scheduled at release
Technology
Technologies we work with.
The stack is a consequence of the problem, not the starting point. We favour widely used, well-documented technologies because they keep your options open — including the option of hiring someone else.
If you already run a stack internally, we will normally build in it rather than introduce a second one for your team to support.
Application
- TypeScript
- Node.js
- NestJS
- Go
Interface
- React
- Next.js
- Design systems
- Accessible components
Data
- PostgreSQL
- Migrations
- Reporting pipelines
- Object storage
Platform
- Docker
- Cloud infrastructure
- CI/CD
- Monitoring
Engagement models
How the work is contracted.
Project-based
A defined scope, timeline and delivery plan for a specific build.
- Written scope and release plan
- Fixed set of deliverables
- Best for a first release or a bounded system
Dedicated team
A technical team aligned to your roadmap over a longer horizon.
- Composition set around the workload
- Continuous delivery cadence
- Best for an evolving product
Managed monthly
Continued development and maintenance after the first release.
- Agreed monthly capacity
- Prioritised backlog
- Best for systems already in production
Why ZitDevs
What we will and will not tell you.
Scope before estimate
We do not quote a number before understanding the process. Where an estimate carries a range, we say what would move it.
Bilingual delivery
The team works in English and Spanish, including documentation, interfaces and the people using them.
One accountable relationship
Development, infrastructure, IT and growth sit under the same company, so integration is not a hand-off between vendors.
Written over verbal
Scope, decisions, changes and handover exist as documents, so the relationship does not depend on memory.
FAQ
Questions about custom software development.
Answers are written for this service. Where a figure depends on your situation, we say so instead of publishing an average.
How much does custom software development cost?
There is no universal price, and any figure quoted before scope is a guess. Cost is driven by the number of workflows the system has to cover, the integrations it needs, the compliance and access requirements, and whether it replaces an existing system. We give a written estimate after discovery, with the assumptions behind it stated so you can see what would change the number.
How long does it take to build custom software?
It depends on the size of the first release, not on the size of the eventual system. We deliberately scope a first release that is small enough to reach production, then sequence the rest. During discovery we give a timeline for that first release and the reasoning behind it.
Can ZitDevs improve an existing platform?
Yes. We start with a technical review of the codebase, data model and infrastructure to establish what state it is in, what the risks are, and what continuing costs compared with rebuilding a part of it. The review is a deliverable in itself, so you can act on it with or without us.
Can you build an MVP first?
Yes, and in most cases we recommend it. The condition we set is that an MVP is built to be extended rather than thrown away: the same version control, testing and deployment practices apply, so the first release can become the foundation instead of a rewrite.
Who owns the software and source code?
Ownership of deliverables is defined in the contract for each engagement, before work begins. We will not describe a standard arrangement here, because the terms are agreed in writing per project rather than assumed.
Do you provide maintenance after launch?
Yes. Maintenance and continued development are available as a managed monthly service under the same relationship, covering fixes, dependency updates, small improvements and the next stages of the roadmap.
Can you integrate existing business tools?
Yes. Integration work covers accounting, CRM, payment, logistics, email and internal systems, through documented APIs where they exist and other mechanisms where they do not. Which integrations are feasible is confirmed during discovery, not promised in advance.
Can ZitDevs work with our internal development team?
Yes. Shared delivery is common. Responsibilities, repository access, review process and code ownership are agreed in advance so that neither team is guessing who owns what.
What technologies do you use?
Typically TypeScript, Node.js, NestJS, React, Next.js, PostgreSQL, Go, Docker and cloud infrastructure. If your team already maintains a different stack, we will normally build in yours rather than leave you supporting two.
How do you protect confidential business information?
Confidentiality terms are agreed in writing before discovery begins, and access to systems and data is limited to the people doing the work. Specific controls are set per engagement according to what the project touches.
Tell us what the system has to do.
Describe the process you are trying to improve and what currently gets in the way. We will come back with a scope, a first release and an honest view of what it takes.
The form is preselected for custom software development, so the questions match the project.