A device that operates with intermittent connectivity cannot treat synchronization as a secondary capability. When the firmware on the device and the cloud processing layer may hold different versions of the same record, the architecture has to define what correct means for each of them independently. As a software development company serving San Diego's defense, life sciences, and technology businesses, we design the firmware schema and the cloud schema to agree on a canonical truth independently, so synchronization resolves discrepancies rather than introducing them.
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What you get from a software build.
Defense technology, life sciences, and connected device businesses in San Diego rarely need every pillar at once. Most builds center on two or three, and all six are part of the same software development work.
Data ownership settled for the disconnected case before sync logic is written.
Domain modelingAPI contract designTypeScript & GoOffline-first data model
A connected device platform needs its data model designed for the disconnected case first: which fields are authoritative on the device, which are authoritative in the cloud, and what the conflict resolution rule is. Custom software development in San Diego for defense and life sciences devices settles those ownership rules before any sync logic is written.
Tenant isolation and access controls that hold up in DoD or FDA review.
Multi-tenant architectureSubscription billingRole-based accessAudit logging
A defense contractor or life sciences enterprise in a managed IT services environment needs a SaaS platform with tenant isolation and role-based access satisfying CMMC or HIPAA requirements. Enforcing that access at the data layer, not just the interface, makes it defensible in a DoD or FDA review.
Companion and field apps that capture offline and sync without conflicts.
Native iOS & AndroidFlutter & React NativeOffline syncApp Store & Play Store release
A companion app for a medical device or field operations app needs to capture readings correctly when connectivity is unavailable, then sync without duplicate or conflicting records on reconnect. Native versus cross-platform depends on how close the app runs to hardware APIs — Android app development cost factors into that call.
On-device inference with an eval set built from real device states.
LLM & RAG pipelinesOn-device inference and edge AI modelsEvals & guardrailsDocumented model decisions
A model running inference on a medical device, defense sensor platform, or industrial IoT system needs correct outputs with no cloud connection, plus a documented decision trail linking each inference to a specific model version and input. An eval framework built from real device states and sensor readings, not clean development data, is what makes on-device inference trustworthy.
The one blocking component replaced while deployed devices keep operating.
Strangler-pattern migrationZero-downtime cutoverFramework & database upgradesPhased rollout
A defense system or medical device platform built a decade ago often has one component blocking current connectivity or security requirements: a sync protocol assuming constant connectivity, an unsafe partial-update mechanism, or a data model that cannot reconcile device and cloud records unaided. Replacing it in the field needs careful state migration devices can finish offline.
Ingestion, storage, and access controls built for out-of-order offline events.
Infrastructure as codeCI/CD pipeline designIoT developmentCompliance-ready observability
A connected device platform needs an ingestion pipeline that handles events arriving out of order, a storage schema that can reconstruct the authoritative state of any device at any point in time, and access controls meeting defense or life sciences compliance requirements. Getting those foundations right at the initial build beats retrofitting once devices are deployed.
Built for every vertical.
Why teams pick us for this.
A firmware-cloud architecture is proven in the field, when a device loses connectivity and has to reconcile state on reconnect.
An engineer who has built firmware-cloud sync before knows where failure modes live: untested conflicts, undefined states, dropped events.
We recommend an offline-first architecture whenever it genuinely fits, even when it adds complexity to the initial firmware.
The engineer who designs the offline state model also builds the sync protocol, so nothing gets lost between firmware and cloud.
Our achievements display our capabilities
Selected work real outcomes.
Connected device platforms, defense technology systems, and life sciences software built for San Diego's regulated technology market sit alongside enterprise SaaS products serving the broader Southern California technology ecosystem.
View All Case StudiesSenior from the first conversation, not just the proposal. Our software developers in San Diego stay on through release, whichever pillar you start with, not a rotating cast handed off between phases.
Start a conversation{ 01 }· Week 1
We start by mapping the connectivity assumptions, the offline behavior requirements, and the data ownership model, then settle the firmware and cloud schemas before any feature development begins.
{ 02 }· Week 1 to 2
Design and API architecture run in parallel, so the interface and the backend line up from day one.
{ 03 }· Ongoing sprints
Build happens in two-week sprints, each producing a working version tested against real data, not a single drop at the finish line.
{ 04 }· After launch
We manage deployment and rollout, then remain on the project for monitoring, fixes, and new features once it is live.
Trusted voices. Real outcomes.
“We truly appreciated their dedication, technical expertise, and problem-solving approach.”
Young Onion
Department Head
“I was blown away by the knowledge the team had about creatives, e-commerce, website design, and optimization.”
Decathlon Sports India
Image Leader
“They have a good team of designers and project managers who help us with the designs using HTML, Angular, and React.”
Instarama
COO
“Their creativity stands out. A collaborative team that delivered high-quality solutions working closely with us.”
CodeGama LLP
Business Developer
“The product has become more intuitive and user-friendly. Load times dropped significantly after their work.”
Qoruz
Co-Founder
“Their commitment to timely delivery was impressive.”
CurleyStreet Media
Business Development Rep
“We truly appreciated their dedication, technical expertise, and problem-solving approach.”
Young Onion
Department Head
“I was blown away by the knowledge the team had about creatives, e-commerce, website design, and optimization.”
Decathlon Sports India
Image Leader
“They have a good team of designers and project managers who help us with the designs using HTML, Angular, and React.”
Instarama
COO
“Their creativity stands out. A collaborative team that delivered high-quality solutions working closely with us.”
CodeGama LLP
Business Developer
“The product has become more intuitive and user-friendly. Load times dropped significantly after their work.”
Qoruz
Co-Founder
“Their commitment to timely delivery was impressive.”
CurleyStreet Media
Business Development Rep
“Simply put, the quality of their code is excellent. They integrated third-party software and ensured GDPR compliance.”
VIA IOM
Director
“What impressed us most was how well they understood our brand and translated it into clean, thoughtful designs.”
GD Farm Fresh
Director
“Their team was patient, courteous, responsive, and technically proficient throughout the entire project.”
Studio by Nandita Manwani
Partner
“Zethic Technologies generally delivers on time and in line with our requirements – deployed in 30+ countries.”
SABA Hospitality
Executive Director
“Zethic built the features specifically to match our internal workflow and business needs. Professional and on time.”
Coral Publishers
Executive
“Zethic Technologies is a true partner.”
Geordana
CEO
“Simply put, the quality of their code is excellent. They integrated third-party software and ensured GDPR compliance.”
VIA IOM
Director
“What impressed us most was how well they understood our brand and translated it into clean, thoughtful designs.”
GD Farm Fresh
Director
“Their team was patient, courteous, responsive, and technically proficient throughout the entire project.”
Studio by Nandita Manwani
Partner
“Zethic Technologies generally delivers on time and in line with our requirements – deployed in 30+ countries.”
SABA Hospitality
Executive Director
“Zethic built the features specifically to match our internal workflow and business needs. Professional and on time.”
Coral Publishers
Executive
“Zethic Technologies is a true partner.”
Geordana
CEO
Ways to work with us.
One team, one way of working, regardless of whether you are building something new or extending what is already live. Most clients pick a starting point and move to the other option later, once the project's shape becomes clearer.
A system scoped with a fixed feature list, timeline, and price tag. Works best when you already know what the first version has to include.
A senior pod that plugs into your existing tools and sprint cadence, shipping on an ongoing basis. Suits teams that need more capacity without running a full internal hiring process.
Questions, answered.
San Diego rates sit below San Francisco, reflecting a lower cost of living alongside a strong talent pool from UC San Diego and the defense and life sciences employer base. What drives the number is offline architecture complexity: a firmware-cloud platform with proper conflict resolution and state management costs more to design correctly than a standard cloud app. Share the requirements and we'll come back with a specific number.
CMMC Level 2 requires software handling Controlled Unclassified Information to meet 110 security practices from NIST SP 800-171: access control, audit logging, configuration management, and incident response. Any software development company in San Diego building for a defense prime must treat these as architecture constraints — a system that cannot demonstrate compliance risks the contract, and CMMC applies to firmware and cloud equally.
A companion app affecting the performance of a regulated medical device may itself require FDA clearance as Software as a Medical Device. The architecture implications match any medical device software: documented requirements, design decisions linked to risk assessments, and test evidence linked to design. Understanding mobile app development costs here includes validation work, not just engineering hours.
Fixed-scope suits a defined deliverable with price and delivery date locked to a feature list. A dedicated team suits ongoing work where the device firmware, sync protocol, and cloud schema keep evolving as deployments expand — a monthly-billed senior pod handles that better than a locked quote.
A firmware-cloud platform with proper offline state management takes longer than a standard cloud application because the data ownership model and sync protocol are settled before any feature development begins. Once we understand the connectivity model and compliance requirements, we can give a specific timeline rather than a placeholder range.
Software consulting in San Diego draws on the same senior bench as our software development company for the US. That same rigor for on-device models shows up in software development in San Francisco, where eval infrastructure ships with the model.
Tell us about the device, the environments it operates in, and what the cloud side needs to guarantee. A senior engineer replies within one working day.
Tell us what you have
The device, the connectivity environments it runs in, and where sync breaks today. We sign an NDA first.
Speak to an engineer
Someone who has shipped firmware-cloud sync before, not an account manager relaying the question.
Get an architecture read
What the offline case needs, what the cloud schema needs, and a timeline with an engagement model that fits.
Tell us about the device, the environments it operates in, and what the cloud side needs to guarantee. A senior engineer replies within one working day.
