Enterprise Software Development Company in Atlanta

Honest ranges tied to scope. A production-grade proof of concept or a single well-bounded service, including CI, tests, observability and a security review, typically runs USD 60,000 to 150,000 over eight to fourteen weeks. A complete custom platform, meaning multiple services, a real frontend, identity, integrations into three or four existing systems, and the operational tooling to run it, typically runs USD 300,000 to 900,000. A modernization program that moves a legacy core off its original platform, with rule extraction, a reconciliation rig, staged traffic migration and a period of dual running, generally starts at USD 750,000 and can pass 3 million dollars depending on how much undocumented business logic is in there, which nobody knows honestly at the start. Regulated builds carry a real premium: PCI, HIPAA, NERC CIP or CJIS scope adds real cost for evidence, segregation and testing work that is not optional. The number nobody can honestly price up front is how much undocumented behavior the legacy system encodes, which is why discovery produces a rule inventory and a slice plan before anyone quotes the build. We quote fixed fee per phase against a signed statement of work and we price discovery separately so you can stop after it.

We assume the rewrite will fail and design so that it does not have to happen all at once. The first phase is archaeology: extract the business rules that exist only in COBOL, JCL and stored procedures, and build a characterization test suite that captures current behavior including the behavior that is technically wrong but that downstream systems depend on. That suite is the contract for everything after. Then we put change data capture in front of the legacy datastore using Debezium, Qlik Replicate or Precisely so new components read from an event stream rather than calling the mainframe synchronously, which immediately decouples availability. Then a strangler facade routes traffic by capability, starting with reads, then low-risk writes, then the transaction paths that actually matter. Every slice runs in shadow mode first, where the new path computes an answer that is compared to the legacy answer and logged but not used, until the mismatch rate is provably zero. Batch is the hard part in Atlanta financial and rail systems, because the overnight window is often already full, so we model the batch dependency graph explicitly and move jobs individually. Rollback stays live for every slice until the legacy path is decommissioned deliberately.

It shapes the architecture, not just the audit. PCI DSS v4.0.1 was published on 11 June 2024, and the future-dated requirements from v4.0 became mandatory on 31 March 2025, so the transition period is over and anything still designed to v3.2.1 assumptions is behind. The most valuable engineering decision is scope reduction: every system that stores, processes or transmits cardholder data falls into the cardholder data environment, and every one of those systems carries continuing cost at every assessment. So we tokenize at the earliest possible point, keep primary account numbers out of application databases, logs, message queues and analytics entirely, and use a hosted or isolated capture surface so the main application never touches raw card data. Beyond scope, the requirements that most commonly bite custom builds are multi-factor authentication for all access into the environment, the newer client-side script and payment page integrity requirements, targeted risk analyses for anything you do on a defined frequency, and authenticated internal vulnerability scanning. We build the evidence as an artifact of the pipeline, so change records, access reviews and scan results are produced automatically rather than assembled in a panic before a QSA visit.

Through the interface layer the health system already operates, on their terms, under a signed business associate agreement. Practically this means HL7 v2 messaging for the older ADT, ORM and ORU flows that still carry most real traffic, FHIR R4 APIs where the system exposes them, and USCDI data classes as the common vocabulary. Most large Georgia systems run Epic or Oracle Health with an interface engine such as Mirth or Rhapsody in front, and integration goes through that engine rather than around it. The regulatory backdrop matters to design: the CMS Interoperability and Prior Authorization final rule at 89 FR 8758, published 8 February 2024 and effective 8 April 2024, pushes payer and provider API capability including prior authorization, patient access and provider access APIs, which is generating real integration work across Atlanta health systems now. On top of that, the HIPAA Security Rule proposed update published 6 January 2025 at 90 FR 898 signals where control expectations are heading even though it remains a proposed rule. We design PHI to be minimized, encrypted in transit and at rest, logged at the access level, and deletable, and we keep the audit trail in a store your compliance office can query without engineering help.

Three overlapping layers. First, if the system touches criminal justice information, the FBI CJIS Security Policy applies, and in Georgia criminal justice information services run through the Georgia Crime Information Center within the Georgia Bureau of Investigation. That policy drives advanced authentication, personnel screening for anyone with access including contractors, physically and logically segregated environments, detailed audit logging, and incident response obligations. It also constrains where data can be hosted and who may administer it, which is the constraint that most often reshapes an architecture. Second, state agency work runs through the Georgia Technology Authority and its procurement and security expectations, and many agencies now look for StateRAMP or FedRAMP authorization as a shortcut for vendor assurance. Third, public records and retention law applies to the data itself, which means retention and disposition need to be designed rather than left to whatever the database does. Systems in the automated license plate recognition and video surveillance category, where Atlanta has a significant industry, add a public trust dimension: access controls, retention limits and audit visibility are as much a procurement requirement as a legal one. We design for that from the start because retrofitting audit is expensive.

By being explicit about the clock and the escalation path instead of implying a presence we do not have. Codazz has no Atlanta office. Our engineers work from Edmonton, Canada and Chandigarh, India. Edmonton sits on Mountain Time, two hours behind Atlanta year round because both regions change for daylight saving on the same dates, so 9 AM Eastern is 7 AM in Edmonton and the team is already at work when your architects arrive. Chandigarh runs India Standard Time, nine and a half hours ahead of Atlanta in summer and ten and a half in winter, so overnight in Atlanta is a full working day there. That is what makes continuous build, test and triage genuinely possible rather than a slogan. For production systems we define severity levels, paging order and response targets before launch, and we run a follow-the-sun on-call where the Chandigarh engineer holds the pager during Atlanta night hours with a documented handoff at each boundary. Design workshops, architecture reviews and demos are scheduled in Eastern business hours so your people never take a 10 PM call. Where a program genuinely needs someone physically in a data center, a plant or a secure facility, we say so and scope that to your staff or a local partner.