Moss and Spark LogoMoss and Spark

We build software tools that save you time.

We are a husband & wife studio building specialized SaaS apps, engineering calculators, and custom internal tools for small-but-mighty teams.

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Based in California • Remote-friendly

Studio snapshot

Currently accepting new engagements for 2026.

Projects shipped
4+ tools
Primary focus
Custom software & automation
Availability
Now booking 2026

Who we are

Husband & wife software studio

We design and build software that works the way you need it to.

We partner with business owners, engineering companies, and environmental firms that need software development but prefer a small, experienced team that can own a problem end to end. Whether it is a custom web app or an internal tool, we focus on clarity, speed, and great user experience.

Our sweet spot is building:

  • Web apps built for specialized workflows.
  • Engineering & environmental calculators with documented, verifiable calculations.
  • Internal tools that help small teams do more.

What we bring

Deep technical range plus product instincts.

  • Full-stack development
  • Design & UX systems
  • Automation workflows
  • Technical writing & docs

Work

Selected projects

A few recent tools we designed, engineered, and ship support for.

Machinery Advisor

Process equipment sizing calculator tool for rotating machinery like compressors, expanders, and pumps.

Next.jsSupabaseInternal tools
Visit site

Rapid RUSLE

Automated erosion risk calculator evaluating construction windows and location to keep CGP compliance on track with SWPPP-ready PDFs.

SaaSAPI integrationsEngineering tools
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Data Scrub

Web-based tool that scrubs spreadsheets and documents for personally identifiable data before you upload anything to AI tools.

AutomationTypeScriptInternal tools
Visit site

Beam Sense

Structural engineering helper that runs first-pass beam loading evaluations to save engineering hours.

IoTDashboardsMonitoring
Launching soon

Toolbox

A dependable stack we customize for every engagement.

Next.jsTypeScriptTailwind CSSSupabasen8n

What we build

Services tailored for focused teams

From zero-to-one SaaS products to bite-sized automations, we keep scope sharp and execution tight.

  • SaaS

    Custom SaaS & internal tools

    Focused, fast web apps that feel custom-built for the teams that rely on them every day.

  • Calc

    Technical calculators & engineering workflows

    Validated, documented calculators and dashboards for science and environmental use cases.

  • API

    Automation & integrations

    Connect your tools and automate repetitive work.

  • Web

    Landing pages & product sites

    Launch-ready marketing sites that match your product and can evolve with it.

Process

How we work

Structured enough to keep momentum, flexible enough to adapt as we learn.

  1. 1

    Listen & scope

    We dig into the problem, constraints, and what success looks like for your team.

  2. 2

    Design & prototype

    Wireframes and flows come first so we can validate UX before we write serious code.

  3. 3

    Build & test

    We ship small, iterate quickly, and make sure every release is stable and documented.

  4. 4

    Launch & support

    Handoff, training, docs, and lightweight support so your team can run confidently.

Start a project

Tell us what you want to build

Share a little context and we will follow up with timing, scope ideas, and next steps.