Custom Software Development Services
We make complex, simple. Senior engineers design and build software around how your business actually works, connected to the ERP, CRM, and data systems you already run.
Custom application
APIs
- ERP
- CRM
- Data systems
EXISTING SYSTEMS
What Is Custom Software Development?
Custom software development services design and build software for one organization's workflows, data, and rules, rather than adapting the business to a product built for everyone. Off-the-shelf software is configured within the limits its vendor sets. Custom software is built to fit, and the organization that pays for it owns it.
Off-the-shelf software is faster to start and fits well when your process matches how most companies work. Its costs grow with every seat and add-on, and you adjust your workflow to the product.
Custom software vs. off-the-shelf software
Custom software costs more up front than off-the-shelf, but it fits the workflow, integrates with the systems you run, and belongs to you, with no per-seat licensing. The honest answer is sometimes "buy," and when that's true, JBS Dev will tell you.
WHEN TO BUILD
When Custom Software Makes Sense
Custom software earns its cost when standard products force workarounds. These are the most common signs it's time to build.
The product doesn't fit the workflow
Teams work around the software instead of with it, adding manual steps, side spreadsheets, and extra approvals the product can't handle.
Per-seat costs keep climbing
Per-seat SaaS licenses grow with headcount, and add-ons pile up, while the tool still covers only part of the workflow.
Your systems don't talk to each other
Staff re-key data between ERP, CRM, and legacy SQL databases because the systems were never built to share it through APIs.
A spreadsheet is running a core process
A critical workflow depends on a shared spreadsheet that only a few people understand, with no audit trail or access control.
The software is your advantage
When the way you serve customers sets you apart, software that every competitor can buy won't capture what makes you different.
Compliance rules no product covers
Industry or contract rules require specific controls, records, or approvals that no off-the-shelf product handles without costly customization.
OUR APPROACH
How We Build Custom Software
We build software the way senior engineers would want it built for themselves: led by experienced people, made for production, and connected to what you already run. Senior US-based engineers lead our builds, with nearshore support available for ongoing work.
Junior-heavy team
- Rework
- Extra reviews
- Missed requirements
- Time spent managing the vendor
Senior-led team
Senior-led delivery
Senior engineers and technical leaders lead every engagement and make architecture, integration, and security decisions directly, with fewer handoffs and faster decisions.
Production, not demos
We hand over a working system inside your environment, with integrations, guardrails, observability, error handling, and human oversight built in.
Built around what you already run
ERP, CRM, order management, legacy SQL, mainframes, and document stores. We build around your real applications and business rules, not a greenfield diagram.
You own what we build
We don't sell licenses or platforms. You own everything we build.
WHAT WE BUILD
Custom Applications We Build
Our product engineering services cover the custom applications companies rely on every day, from internal tools to customer portals and AI features.
Internal tools and workflow applications
Applications that replace spreadsheets, email chains, and manual steps with a single workflow, built around your approvals, roles, and business rules, and connected to the systems your staff already use.
Customer and partner portals
Secure portals where customers and partners place orders, check status, and manage accounts, built as web and mobile applications and connected to the systems behind them, such as curbside pickup for a pet retailer.
Integrations and APIs
APIs and data pipelines that move information between systems without manual re-entry. Our systems integration work includes a daily pipeline that automated about 30,000 records a day for a regional bank.
Data and reporting applications
Applications that bring data from several systems into one place for reporting and analytics, backed by a data warehouse where needed, so leaders work from one trusted set of numbers.
AI features inside existing software
Document extraction, search, forecasting, and AI agents added to software you already run, with people approving the actions that matter and results flowing back into your existing systems.
Modernized versions of aging applications
Aging applications rebuilt or modernized in stages, keeping the business rules that still work. Our legacy application modernization work keeps the business running while old and new systems run side by side.
HOW IT WORKS
How a Custom Software Project Runs
STEP 1
Business Goals
We define what the software must achieve and how success will be measured.
STEP 2
Constraints
We map the systems, data, compliance rules, budget, and timeline the build must work within.
STEP 3
Architecture Review
Senior engineers design the architecture and the integrations with your existing systems.
STEP 4
Delivery Plan
We break the build into stages, each delivering working software.
STEP 5
Approved Plan
You approve the plan, and our product engineering services move into the build.
Built to be tested
We write automated tests for core components and ship through CI/CD, so every change is tested before it reaches production. Releases happen in stages, which keeps each one small and makes problems easier to catch and reverse. Our QA and software testing practice can also take on functional, regression, and performance testing for larger releases.
What your team gets at handoff
You own everything we build. Services we can provide at handoff include knowledge transfer sessions with your engineers covering the codebase, deployments, and day-to-day operations, plus documentation such as architecture diagrams, API references, runbooks, and deployment guides. Because we work in sprints and share progress as we go, less is left for a last-minute handoff. Ongoing support is also available.
RESULTS
Custom Software Results
For a regional bank, JBS Dev built a custom pipeline that automated about 30,000 records a day, delivered in just under four months. For a PropTech startup, JBS Dev built a 6 to 8 week proof of concept that cut listing description writing from more than 30 minutes to under 5, then expanded it into a full platform.
24 hrs
To set up a new grant program
Emergency Management
Phoenix OneCase Grant Platform for Tidal Basin
Challenge: Legacy grant systems were slow to adapt for each disaster program and couldn't handle surges in applications.
Result: A Django, React, and AWS platform sets up new programs in 24 hours and was load-tested to 50,000 concurrent applications in 30 minutes.
Read the Tidal Basin case study525
Schools on one franchise system
Education
Franchise Management System for The Goddard School
Challenge: Each of 525 schools ran separate off-the-shelf software with no rollup reporting.
Result: A .NET system on Azure gives real-time visibility into every school and automates pro-rated billing. JBS Dev has been the franchisor's development partner for more than 10 years.
Read the Goddard School case study$800K
A week in completed grooming appointments
Retail
Custom Scheduling Platform for a National Specialty Pet Retailer
Challenge: The retailer's legacy grooming scheduler was slow, and frustrating online booking lost appointments.
Result: A new platform on AWS Lambda, API Gateway, and Aurora cut page load from 20 seconds to 1.5 and adds $800K a week in completed grooming appointments.
Read the pet retailer case study"JBS feels more like an extension of our internal team than a traditional vendor relationship."
Senior IT Leader, AmeriVet Partners
TECHNOLOGY
Technologies We Build With
We choose technology for the job, and these are the platforms and tools we build with most often: cloud-native development on AWS, APIs, AWS Lambda, Amazon Bedrock, Amazon SageMaker, Amazon Textract, and both local and frontier AI models.
AI-driven development is a core part of how JBS Dev works. Agentic tooling compresses the routine work, so senior engineers move faster.
AI-DRIVEN DEVELOPMENT
Agentic tooling
Compresses the routine work
Senior engineers
Review and ship
CLOUD-NATIVE DEVELOPMENT ON AWS
AWS Lambda
APIs
Local and frontier AI models
COST AND TIMELINE
What Drives Custom Software Development Cost and Timeline
Custom software cost and timeline depend mostly on scope and on what the software has to connect to. Six factors drive most estimates:
- 01Scope and number of workflows
- 02Integrations with existing systems
- 03Users, roles, and permissions
- 04Data migration
- 05Security and compliance requirements
- 06Support after launch
How the timeline is set
Timelines depend on scope, and the assessment sets them. Because we build in stages, working software reaches production before the whole project is done. As reference points, JBS Dev launched curbside pickup for a pet retailer in six weeks, and a regional bank's daily data pipeline went from kickoff to running in just under four months.
How cost is set
We don't quote a number before we understand the work. The assessment turns the factors above into an estimate for each stage of the build. Before recommending any piece of work, we ask whether it will pay for itself if it goes as planned. If the answer is no, or if an off-the-shelf product would do the job, we'll tell you.
ENGAGEMENT MODELS
Ways to Work With Us
Each model stands alone or leads into the next. Compare all the ways to work with us.
Assessment & Strategy
For companies that need clarity before committing to a build.
Start here if you're not sure what to change first. We review the system component by component, weigh difficulty against business impact, and recommend a path for each part, including what to leave alone. You get a roadmap you can act on with us or on your own.
- Technical assessment
- Architecture review
- AI opportunity mapping
- Modernization roadmap
- Prioritized recommendations
Best when: You need to understand the opportunity, risk, architecture, or roadmap before investing in a larger build.
Projects
For companies ready to build or modernize a defined system.
For a defined scope, senior engineers lead delivery from architecture through release. We work in stages, write tests for core components, and ship through CI/CD. You own everything we build, plus knowledge transfer and documentation tailored to your team.
- Modernization projects
- Custom applications
- Cloud platforms
- Data systems
- Integrations
- AI agents
Best when: You have a clear business problem, workflow, or platform that needs to be built, modernized, or connected.
Teaming / Managed Delivery
For companies that need experienced delivery capacity.
When you need more than a single project, services we can provide include architectural guidance for your existing team, hands-on development, QA, and ongoing support. Senior US-based engineers lead our builds, and nearshore support is an option for ongoing work.
- Senior-led teams
- Embedded engineering
- Ongoing development
- Knowledge transfer
- Flexible support
Best when: You need reliable engineering capacity, technical leadership, or ongoing delivery support without adding unnecessary management overhead.
Project stalled with another vendor? Software Project Rescue
WHY JBS DEV
How to Choose a Custom Software Development Company
Choosing a custom software development company is a decision you'll live with for years. These five questions separate a partner who builds software you can run from one who leaves you managing the result.
- Who writes the code?
- Senior engineers. Engagements are led by senior engineers and technical leaders who can make architecture, integration, and security decisions directly. That means fewer handoffs, faster decisions, and the people you meet in the first call doing the work.
- What does the offshore quote leave out?
- The hidden cost of managing a junior-heavy team does not show up on the quote. Rework, extra reviews, missed requirements, and the time your own people spend managing the vendor all add to the real price. A lower hourly rate only looks like a saving if you ignore those costs. Rushed code also leaves technical debt your team inherits.
- Who owns the code?
- You do. You own everything we build, including the code and the intellectual property. We don't sell software licenses or a platform, so there's no ongoing fee to keep using your own system, and your team can maintain or extend it.
- Where is the team?
- Senior US-based engineers lead our builds, with nearshore support available for ongoing work. If you are looking for a custom software development company in the USA, you will know exactly who is designing, building, and supporting your software.
- What happens after launch?
- Services we can provide after launch include application support and maintenance, bug fixes, updates, and new features as your business changes. Your own team can take over instead, with knowledge transfer and documentation from us. Either way, the software keeps running.
JBS Dev is a senior-led custom software development company, founded in 1999, that builds, modernizes, and integrates enterprise systems around the technology clients already own.
FAQ
Custom Software Development Services FAQs
What do custom software development services include?
Custom software development services cover designing, building, testing, and supporting software built for your workflows. Ours include internal tools, customer and partner portals, integrations and APIs, data and reporting applications, AI features inside existing software, and modernized versions of aging applications, all connected to the systems you already run.
How much does custom software development cost?
It depends on scope, integrations, users and permissions, data migration, compliance requirements, and support after launch. We don't quote a number before we understand the work. An assessment turns those factors into an estimate for each stage, and we tell you if a piece of work won't pay for itself.
How long does it take to build custom software?
It depends on scope and on what the software must connect to. Because we build in stages, the first working software reaches production early. JBS Dev launched curbside pickup for a pet retailer in six weeks, and a regional bank's data pipeline was running in just under four months.
Who owns the code and the intellectual property?
You do. You own everything we build, including the code and the intellectual property. We don't sell software licenses or another platform, so there's no license fee to keep using your own system. Knowledge transfer and documentation are services we can provide at handoff.
Can custom software work with our existing ERP and CRM?
Yes. We build around what you already run, including ERP, CRM, order management, legacy SQL, mainframes, and document stores, connecting them through APIs and data pipelines. For a regional bank, we built a pipeline that moves about 30,000 records a day between two systems that had never shared data.
Should we build custom software or buy an off-the-shelf product?
Buy when an off-the-shelf product fits your workflow and its per-seat costs stay reasonable. Build when the product forces workarounds, licensing keeps climbing, or the software is part of what sets you apart. Sometimes the honest answer is that you don't need custom software, and we'll tell you so.
Do you support the software after launch?
Yes. Services we can provide after launch include application support and maintenance, bug fixes, updates, and new features. If your own team will run the software, we provide knowledge transfer and documentation so they can maintain and extend it with confidence.
Can you take over a project another vendor started?
Yes. We've taken over projects that stalled or went sideways under another vendor. We start by finding what's actually broken. When Petco's mobile app was less than 25% complete after a year, a JBS Dev team of five finished it in four months. See Software Project Rescue.
