Custom Software Development Services

We design and build custom software for regulated companies, including AI-enabled and agentic systems. We settle build vs buy before anyone writes code, and you own every line we ship.
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Definition

What is custom software development?

Custom software development is the design, build, testing, and support of software written for one organization's processes, data, and users, which that organization owns instead of licensing. BD Emerson designs and builds custom and enterprise software, including AI-enabled and agentic systems, for insurers, banks, fintechs, healthcare organizations, private equity portfolio companies, and other regulated clients. Every engagement starts with a build vs buy decision, designs security and compliance controls in from the first sprint, and integrates with the core platforms you already run. When the system already exists, we modernize it in stages so the business keeps running on the old one until the new one reconciles.

Services

What our custom software development services include

Custom application development
AI-enabled and agentic systems
Enterprise software development
Legacy application modernization
Core platform integration
Build vs buy and architecture

Custom application development

Web applications, internal tools, customer and partner portals, and mobile apps built around how your teams work. We scope the first release around one workflow you can measure, so users get working software early and the backlog follows what they use.

AI-enabled and agentic systems

Software that uses language models where they earn their place: document intake, triage, summaries, and agents that complete multi-step work while a person approves the actions that matter. Calls are logged, outputs are tested against evaluation cases, and each agent reaches only the data and tools its role needs.

Enterprise software development

Custom enterprise software development for workflow, case management, reporting, and line-of-business systems that have outgrown spreadsheets and point tools. We design role-based access, audit trails, and single sign-on in from the start, because enterprise buyers and auditors check for them first.

Legacy application modernization

We modernize applications that are expensive to change or hard to secure one module at a time, choosing to rehost, refactor, or rebuild each module based on what it is worth to the business. The old system keeps running until the new one reconciles, so no cutover depends on a single weekend.

Core platform integration

APIs, event streams, and data pipelines that connect new software to the platforms you already run: policy administration and claims cores, core banking and payment processors, EHRs, ERPs, and CRMs. Each integration gets a written data contract, error handling, and monitoring.

Build vs buy and architecture

Before any code, we price building against buying or extending what you run, with license, implementation, and run costs on both paths. When a product fits, we recommend it and help you implement it. When building wins, the same analysis becomes the architecture.

How we engage

Four ways to work with us

The usual starting point is a paid discovery sprint, and once the estimate is on the table, you choose the build shape that fits. If you are still deciding whether to build at all, start with our build vs buy analysis and calculator.
01

Paid discovery sprint

A short, paid engagement that produces an architecture, a prioritized backlog, and an estimate you can take to finance. You keep all three whether or not we build the system.

02

Fixed-scope build

One defined release built against an agreed backlog, price, and acceptance criteria. This shape fits work that discovery has pinned down, including the integrations and data it depends on.

03

Dedicated product team

A standing team of engineers, a product lead, and QA that ships on a regular cadence against your roadmap. This shape fits products that will keep changing after launch.

04

Modernization of an existing system

We take on an application you already run and modernize it in stages, with the old system live until the new one reconciles. The work starts with an assessment of which modules to keep, refactor, or rebuild.

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Planning a custom software build?

Talk to BD Emerson about the system you have in mind, the platforms it has to work with, and whether building it is the right call. A discovery sprint turns that conversation into an architecture, a backlog, and an estimate.

Our Advantage

Why BD Emerson for custom software

Build vs buy comes first

We advise on build vs buy before anyone writes code, and buying wins more often than building. Each recommendation comes with license, build, and run costs on both paths, so it holds up in front of your CFO and your board.

Security built in from sprint one

Our practice runs SOC 2, ISO 27001, and privacy programs, so access control, encryption, logging, and change management ship with the first release. We also perform SOC 2 examinations through our CPA attest practice, and the firm that examines a client does not also build its controls.

Built for regulated industries

We build for insurers, banks, fintechs, healthcare organizations, and private equity portfolio companies, where audit trails, data handling, and core platform integration decide whether software ships. You own the code and the intellectual property we create for you.

How We Work

How we deliver custom software

One delivery process runs every engagement, from a discovery sprint to a long-running product team. Each step leaves artifacts you keep: an architecture, a backlog, test suites, runbooks, and the code itself.
Reviews

What our customers say

Great consulting firms for scaling security, compliance, and appsec.

Outstanding partner in Technical and Cyber Due Diligence

Appsec maturity and application hardening.

BD Emerson helped us simplfiy our compliance management.

BD Emerson did such a phenomenal job. What started as privacy support quickly became a full partnership across compliance, engineering, and even business operations. They’re embedded with our team. They understand our product. They move fast. They’re simply invaluable.

Adam Ben Jacobs

CTO @ OneStep GPS

Great consulting firms for scaling security, compliance, and appsec.

Outstanding partner in Technical and Cyber Due Diligence

Appsec maturity and application hardening.

BD Emerson helped us simplfiy our compliance management.

BD Emerson did such a phenomenal job. What started as privacy support quickly became a full partnership across compliance, engineering, and even business operations. They’re embedded with our team. They understand our product. They move fast. They’re simply invaluable.

Adam Ben Jacobs

CTO @ OneStep GPS

We had a hard time finding the right company to partner with in support of our compliance journey. Some vendors sell the idea that they do the work, but then you end up doing everything. The ambiguity is what killed our last project. BD Emerson’s team has such great technical knowledge and understands the standard so well that they made us comfortable with moving fast. This has led to us closing major enterprise customers that were previously out of reach because of security and compliance.

Tom Watkins

CEO @ AMI AssetTrack

Lead an enterprise initiative to overhaul the organization's technology stack from ecommerce, corporate tech, and corporate security.

Supported ISO 42001 exercise and served as internal auditor.

Rubrik's privacy and compliance team began with the backbone of BD Emerson. BD Emerson supported building out the privacy program, GRC (ISO 27001, SOC 2, CMMC, FedRAMP), and the appsec function.

We needed a partner who could move quickly, without sacrificing precision. BD Emerson brought the expertise, structure, and speed we were looking for. Their team became an extension of ours, embedding themselves across the organization, guiding us step by step, and giving us confidence in areas we hadn’t tackled before. The internal audit they conducted was so detailed that even the external auditors called it out. Achieving ISO 27001 with zero nonconformities says everything you need to know about the quality of the partnership.

Walid Souilem

CTO @ FGI Worldwide

We had a hard time finding the right company to partner with in support of our compliance journey. Some vendors sell the idea that they do the work, but then you end up doing everything. The ambiguity is what killed our last project. BD Emerson’s team has such great technical knowledge and understands the standard so well that they made us comfortable with moving fast. This has led to us closing major enterprise customers that were previously out of reach because of security and compliance.

Tom Watkins

CEO @ AMI AssetTrack

Lead an enterprise initiative to overhaul the organization's technology stack from ecommerce, corporate tech, and corporate security.

Supported ISO 42001 exercise and served as internal auditor.

Rubrik's privacy and compliance team began with the backbone of BD Emerson. BD Emerson supported building out the privacy program, GRC (ISO 27001, SOC 2, CMMC, FedRAMP), and the appsec function.

We needed a partner who could move quickly, without sacrificing precision. BD Emerson brought the expertise, structure, and speed we were looking for. Their team became an extension of ours, embedding themselves across the organization, guiding us step by step, and giving us confidence in areas we hadn’t tackled before. The internal audit they conducted was so detailed that even the external auditors called it out. Achieving ISO 27001 with zero nonconformities says everything you need to know about the quality of the partnership.

Walid Souilem

CTO @ FGI Worldwide

BD Emerson didn’t just help us meet our compliance goals; they integrated security and privacy into the core of our operations. I highly recommend BD Emerson to anyone seeking SOC 2 or GDPR compliance, or simply looking to enhance their security team and boost customer trust in their product and services. Their dedication and expertise have been invaluable to our success.

Padraig Reilly

CEO, Boxcore

BD Emerson understood our business requirements and worked side-by-side with us. The policies and controls we developed together not only meet compliance standards but improve how we operate day to day.

Matt Meierdierks

IT Manager, Lincoln Industries

From day one, BD Emerson brought urgency, clarity, and a sharp understanding of what truly matters to our business — earning and keeping customer trust. They went beyond helping us meet compliance requirements; they helped build a foundation for secure, scalable growth. That kind of partnership is rare.

Jason Marker

CEO @ LifeLenz

BD Emerson didn’t just help us pass an audit—they helped us build a sustainable culture of security.

Alexey Indeev

CTO Spare

BD Emerson was essential in helping our company navigate the daunting process of leveling up our security infrastructure. BD Emerson’s impressive expertise and confidence throughout the process helped our team exceed HIPAA and SOC 2 Type 1 standards quickly, distilling what can be an overwhelming process into a streamlined, organized effort. From day one they began adding value and getting us on course. With their help we delivered on a massive security overhaul with both extreme efficiency and thorough attention to details. Because of BD Emerson’s support, we’ve increased our clients’ trust in Titan Intake and the life-changing work it accomplishes for those seeking specialist referrals.

Patrick Bruce

CEO, Titan Intake

BD Emerson didn’t just help us meet our compliance goals; they integrated security and privacy into the core of our operations. I highly recommend BD Emerson to anyone seeking SOC 2 or GDPR compliance, or simply looking to enhance their security team and boost customer trust in their product and services. Their dedication and expertise have been invaluable to our success.

Padraig Reilly

CEO, Boxcore

BD Emerson understood our business requirements and worked side-by-side with us. The policies and controls we developed together not only meet compliance standards but improve how we operate day to day.

Matt Meierdierks

IT Manager, Lincoln Industries

From day one, BD Emerson brought urgency, clarity, and a sharp understanding of what truly matters to our business — earning and keeping customer trust. They went beyond helping us meet compliance requirements; they helped build a foundation for secure, scalable growth. That kind of partnership is rare.

Jason Marker

CEO @ LifeLenz

BD Emerson didn’t just help us pass an audit—they helped us build a sustainable culture of security.

Alexey Indeev

CTO Spare

BD Emerson was essential in helping our company navigate the daunting process of leveling up our security infrastructure. BD Emerson’s impressive expertise and confidence throughout the process helped our team exceed HIPAA and SOC 2 Type 1 standards quickly, distilling what can be an overwhelming process into a streamlined, organized effort. From day one they began adding value and getting us on course. With their help we delivered on a massive security overhaul with both extreme efficiency and thorough attention to details. Because of BD Emerson’s support, we’ve increased our clients’ trust in Titan Intake and the life-changing work it accomplishes for those seeking specialist referrals.

Patrick Bruce

CEO, Titan Intake

Certificates

Our accreditations

At BD Emerson, we believe that our team's extensive certifications not only set us apart but also ensure that we provide the highest level of service to our clients.
FAQ

Frequently asked questions

How much does custom software development cost?

How long does a custom software build take?

Who owns the code and intellectual property?

What technology stacks do you use?

How do you use AI in delivery and in the software you build?

How do you handle security and compliance?

What happens after launch?

When should we buy software instead of building it?

Blog

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