Operational software for businesses outgrowing manual work and disconnected systems.

Whisker Tech builds company-owned software for established B2B businesses. The work may replace a spreadsheet-driven process, connect systems that employees bridge by hand, or support company-specific rules that packaged software cannot handle well.

Start with a no-cost 30-minute call to decide whether the problem merits an assessment, direct delivery, an existing product, or no custom build.

Request a fit call Email David directly

A strong fit

An important part of the business no longer works at its current scale.

Employees re-enter the same information, reconcile conflicting records, or spend hours moving work between systems.
A spreadsheet or homegrown process has become business-critical, but it is difficult to control and harder to improve.
Customer, vendor, or operating information is scattered, so people cannot see the status of work without asking around.
Company-specific know-how lives in inboxes, documents, and the memory of a few experienced employees.

Best suited to established B2B businesses without internal software developers. Whisker Tech works first with owners, COOs and other operations leaders, or IT and business-systems managers in the Charlotte area, and accepts strong-fit remote work across the United States. Current pricing starts with a $15,000 delivery minimum; delivery phases are currently scoped from $25,000–$75,000.

Tell me what is slowing the business down

Founder-built work

Groundwave is a live product I built and operate. It shows how I turn a fragmented real-world operation into working software and remain responsible for it after launch.

Live product · Built and operated by Whisker Tech’s founder

Groundwave

One system for public discovery and the recurring work of amateur-radio clubs.

Amateur-radio clubs often manage members, dues, events, messages, documents, and public information in separate places. Groundwave brings that work into a shared workspace while also helping the public find clubs and repeaters. I designed, built, deployed, and continue to operate the product through Whisker Tech.

Groundwave keeps nationwide FCC records current without overwriting information owned by users and clubs. It reflects the same operating principles I bring to client work: automate repeatable work, connect information people need to act, and retain the company-specific knowledge that makes the process work.

My responsibility: Product, user experience, software, and operations
Work supported: Public discovery and permission-based club administration
Information managed: Updates, reconciliation, and full reconstruction of imported records
Business operation: Subscriptions, deployment, and ongoing support

Read the Groundwave case study Visit groundwavehq.com

Additional technical background

Public code and private research tools.

Ingot

A public data-storage project for Go applications that shows how I approach recovery, operating limits, and failure handling.

Review the technical note View the public source

AlphaFoundry

A quantitative research workspace I built and operate for personal use. Market-data licenses prevent public access, so it is included only as background.

Read the project note

Decide what should change

Custom software is useful when it supports a process that matters to how your company operates. It is not the right answer when existing software or a simpler process change will solve the problem well.

Understand the operation first

A focused assessment maps how the work happens today, where time and information are lost, and what the business actually needs. The result is a practical recommendation and a defined next step, not a commitment to build software.

Buy when buying is the better decision

If an existing product can meet the need at a sensible cost, I will recommend it. The same applies when clarifying responsibilities or changing the process removes the bottleneck without new software.

Build the missing operational system

When the way your company works is specific enough to justify a build, I deliver a company-owned system around a defined part of the operation. Your team gets working software, operating documentation, and control of the accounts and source code.

Assessments are currently $5,000–$10,000. Delivery has a $15,000 minimum, with defined phases currently scoped from $25,000–$75,000.

Discuss whether the problem fits

Working relationship

Your company stays informed and in control.

One accountable person: The person learning the process and making recommendations also builds the system. There is no sales handoff and no subcontracting.
Clear capacity: I limit parallel delivery commitments and confirm current availability before a fit conversation.
Visible progress: You see working software, open decisions, and risks at agreed checkpoints throughout the engagement.
Company control: Your company controls its source code, infrastructure, and vendor accounts where practical. Deployment and handoff are documented.
Knowledge retained: Operating instructions and important decisions stay current so the system does not become another undocumented dependency.
After launch: Delivery includes 30 days to correct defects in the agreed work, plus reasonable launch support. Longer-term support can be arranged separately.

Review an illustrative delivery plan

I’m David Rinaldo.

Before starting Whisker Tech, I spent seven years in software engineering and engineering leadership roles building backend, cloud, and data systems. I left corporate engineering in 2024 to work directly with businesses whose operations need better software.

Red Ventures 3.5 years: Software engineer responsible for AWS accounts and the infrastructure configured within them.
Gannett / USA Today 2 years: Senior engineer and engineering manager on teams operating high-volume cloud systems.
RVO Health 1.5 years: Engineering manager and associate director for the data platform team responsible for large-scale ingestion and machine-learning pipelines used for analytics and decision-making.

That background matters here because operational software must keep working, protect the company’s information, and remain understandable after delivery. Groundwave shows how I approach that responsibility in a product of my own.

Clients deal directly with me, and I do not use subcontractors. I can work with an operations leader who has no internal developer, as well as an IT or business-systems manager who needs a reliable delivery partner.

View my public code on GitHub See my KZ4LA record on Groundwave

Charlotte first · Strong-fit remote US work

What is slowing the business down?

Describe the operation that is taking too much time, losing information, or depending on fragile workarounds. I will reply within one business day with an initial view on fit, current availability, and any focused follow-up question. A first conversation may end with a software option, an existing product to consider, a process recommendation, or no further work.

Email the operating problem

Or write directly to contact@whiskertech.dev.

Current engagement ranges

Assessment: $5,000–$10,000 when the right solution or scope is unclear
Delivery minimum: $15,000
Current delivery range: $25,000–$75,000 for a defined phase

These ranges are a starting point. Final pricing depends on the work. If the problem appears to fit but you are unsure about budget, say so in your note.

What happens next

I review the operating problem and confirm whether a conversation is worthwhile.
If it appears to fit, we have a no-cost 30-minute call about the current process and business impact.
I recommend the most sensible next step. That may be no build, a standalone assessment, or a defined delivery proposal.

Vendor requirements

If your company has vendor, insurance, NDA, or security-review requirements, raise them during the first conversation so I can confirm what the engagement requires.

Fit conversation

Describe the operating problem

Only three fields required

01Name

02Email

03Operating problem

What is happening today, who it affects, and what the business needs to do more reliably.

Add useful business context Optional

Share what you already know. These details help me give you a more useful first response.

04Company

05Your role

06Current process and systems

How the work moves today, including spreadsheets, software, manual steps, and handoffs. Do not include confidential details.

07Why now and timing

08Budget context