Custom Software Development
Web, mobile and internal applications for California businesses that have outgrown spreadsheets, off-the-shelf tools and the workarounds between them.
LOCATION
Custom Software Development for California Businesses
California custom software development for companies working under the strictest privacy rules in the country and the new ones that took effect in 2026.
- Privacy risk assessments and opt-out signals designed in, not bolted on
- Breach detection and evidence built for a 30-day notice deadline
- Your repositories and cloud accounts from day one
Start with a free consultation
Custom Software Development Services for California Companies
If you’re comparing custom software development companies in California, these are the four engagements that most often start the conversation.
SaaS Platforms
Multi-tenant products built with California privacy rights in the data model, from first release to enterprise readiness.
Software Product Development
From a first working version to a shipped product, with discovery, design and engineering in one team.
Privacy & Compliance Engineering
Deletion, opt-out, access-request and audit-logging features added to existing systems that weren’t built for them.
What Is Custom Software Development?
What Is Custom Software Development?
Custom software development is designing and building software around one organization’s processes, data and customers, rather than adapting the business to a product built for everyone.
For California companies, there’s a second reason it matters. Off-the-shelf tools decide for you how personal data is stored, shared and deleted. When the rules on those questions are as demanding as California’s, owning that decision is often worth more than any feature.
For the full service, see custom software development.
What California Businesses Build
California’s economy is broad, and so is the software it runs on. The engagements we see most often from California companies fall into a few groups:
SaaS and technology companies building products whose enterprise customers will send privacy and security questionnaires long before they sign.
Healthcare and life sciences organizations handling data that sits under both HIPAA and California’s own medical privacy rules.
Consumer brands and e-commerce collecting customer data at scale across web, mobile and marketing tools.
Operations-heavy businesses in logistics, manufacturing and agriculture replacing manual processes with systems built for how they actually work.
We work with teams across the state, from the Los Angeles area to the Bay Area, San Diego and Sacramento.
California’s 2026 Privacy Regulations, in Engineering Terms
The California Privacy Protection Agency adopted new regulations under the CCPA on cybersecurity audits, privacy risk assessments and automated decisionmaking technology. According to the CPPA, they were approved on September 22, 2025 and took effect on January 1, 2026. Each part lands on engineering differently.
Risk assessments. Businesses whose processing presents significant risk to consumers’ privacy, such as selling or sharing personal information or processing sensitive data, must assess that risk before doing it. For software, that means knowing exactly which data each feature collects, why, where it goes and who can access it. A system with no data map can’t produce a credible assessment.
Automated decisionmaking technology (ADMT). Businesses using technology to make significant decisions about consumers, such as decisions about financial services, housing, employment or healthcare, must comply with the new ADMT requirements from January 1, 2027. In practice that means being able to give notice before use, handle opt-outs and access requests, and explain how a decision was reached. Those are logging and design problems, not just policy ones.
Cybersecurity audits. Businesses meeting the regulation’s risk thresholds must complete independent cybersecurity audits, with the first certifications phased by revenue between 2028 and 2030. The controls an auditor will examine, such as access management, encryption, logging and incident response, take time to put in place, so the work starts well before the deadline.
We’re engineers, not lawyers. We build the systems these rules assume you have, and we’ll tell you when a question needs your counsel.
Opt-Out Signals: The Browser Setting Your Software Must Respect
Under the CCPA regulations, businesses must treat an opt-out preference signal, such as Global Privacy Control (GPC) sent by a user’s browser, as a valid request to opt out of the sale or sharing of their personal information.
That turns a browser setting into a software requirement:
- Detect the signal on every request, not just when a cookie banner loads
- Record the opt-out against the user or device, so it persists
- Enforce it downstream, in analytics, advertising tags and every integration that receives personal data
- Keep evidence that the signal was honored
The part teams miss is downstream enforcement. Honoring the signal on the website while a marketing integration keeps receiving the data doesn’t meet the requirement.
The 30-Day Breach Clock
California tightened its data breach notification law with SB 446. From January 1, 2026, businesses must notify affected California residents within 30 calendar days of discovering a breach, and where more than 500 residents are affected, notify the Attorney General within 15 calendar days after notifying individuals, under Civil Code §1798.82.
Thirty days sounds like a long time until you need to answer, with evidence, which records were exposed and whose they were. That depends on things built long before any incident:
- Audit logs that show who accessed what, and when
- A data inventory that maps records to the people they belong to
- Monitoring and alerting that detect a breach quickly, since the clock starts at discovery
- An incident runbook that’s been rehearsed, not just written
Software that can answer those questions in hours makes a 30-day deadline manageable. Software that can’t turns it into a crisis.
Does the CCPA Apply to Your Business?
The CCPA applies to for-profit businesses that do business in California and meet at least one threshold. Per the CPPA’s adjusted thresholds, effective January 1, 2025:
- Annual gross revenue above $26,625,000, or
- Buying, selling or sharing the personal information of 100,000 or more California consumers or households, or
- Deriving 50% or more of annual revenue from selling or sharing personal information
You don’t need a California office for it to apply. And it isn’t only about customers: since January 2023, the CCPA’s protections also cover employee data and business-to-business contact data.
Even companies below the thresholds often build to these standards, because their larger customers and partners require it in contracts.
Working With a Distributed Engineering Team
What a California engagement looks like day to day.
Pacific Time, Planned Around Rather Than Ignored
California is the furthest US time zone from our engineers, so we plan for it explicitly. A fixed overlap window is agreed before work starts, and the rest of the day runs asynchronously with written updates.
- A defined daily overlap window, agreed upfront
- Release and review meetings inside that window
- Same-day escalation on anything blocking a decision
One Team From Discovery to Maintenance
The engineers who scope your project build it and support it afterward. No handover to a separate delivery or maintenance team.
- No rotating bench
- One point of contact throughout
- Decisions written down, not left in a call
Privacy Evidence Produced as You Build
California’s new rules reward businesses that can show their work. Data maps, access logs and decision records are produced as the software is built, so a risk assessment or audit draws on records that already exist.
- Data flows documented per feature
- Audit logs designed in from the first sprint
- Decision records kept in your repositories
CALIFORNIA
Why California Businesses Choose Us as Their Software Development Company
Four things worth knowing before you shortlist a software development company in California.
Privacy in the data model
Deletion, opt-out and access requests designed into the schema, not patched in before review.
Ready for the 30-day clock
Audit logs, data inventories and monitoring that answer “what was exposed” in hours.
Honest about fit
If off-the-shelf software covers your workflow, you’ll hear it before the contract.
You own everything
Code, infrastructure and design files in your accounts from day one.
Custom Software Development in California — FAQs
Does the CCPA apply to our business?
It applies to for-profit businesses that do business in California and meet at least one threshold: annual gross revenue above $26,625,000 (the adjusted figure effective January 1, 2025), buying, selling or sharing personal information of 100,000 or more California consumers or households, or earning half or more of revenue from selling or sharing personal information. A California office isn’t required. Your counsel should confirm how it applies to you.
What do California’s 2026 privacy regulations require of our software?
The CPPA’s regulations on risk assessments, automated decisionmaking technology and cybersecurity audits took effect on January 1, 2026. For software, they assume you can show what data each feature collects and why, explain automated decisions, and evidence security controls such as access management, encryption and logging. Systems without a data map or audit logs struggle to meet any of them.
Our product makes automated decisions about people. What changes in 2027?
Businesses using automated decisionmaking technology for significant decisions, such as those about financial services, housing, employment or healthcare, must comply with the ADMT requirements from January 1, 2027. That generally means giving notice before use, handling opt-out and access requests, and being able to explain how a decision was reached. Those depend on logging and design decisions made now.
How quickly must we report a data breach in California?
Since January 1, 2026, affected California residents must be notified within 30 calendar days of discovering a breach. If more than 500 residents are affected, the Attorney General must also be notified within 15 calendar days after notifying individuals. Meeting that depends on audit logs, a data inventory and monitoring that detects incidents quickly.
What is Global Privacy Control, and do we have to honor it?
Global Privacy Control is a browser signal that tells websites a user wants to opt out of the sale or sharing of their personal information. Under the CCPA regulations, businesses must treat an opt-out preference signal like GPC as a valid opt-out request. The signal has to be detected, recorded and enforced in every downstream system that receives personal data.
Does the CCPA cover employee and business-contact data?
Yes. Since January 1, 2023, the CCPA’s protections apply to employee and job applicant data and to business-to-business contact data, not only to consumers. HR systems, internal tools and CRMs therefore need the same deletion, access and correction capabilities as customer-facing software.
Do you work with companies across California or only in Los Angeles?
Across the state. We work remotely with businesses in the Los Angeles area, the Bay Area, San Diego, Sacramento and elsewhere, with a fixed daily overlap in Pacific Time. Where the legal question is specific to your business, we’ll build what your counsel decides is required.
Start Your California Software Project
Tell us what you’re building and we’ll tell you how we’d approach it scope, timeline and estimate, at no cost.