We design, build and operate the software your business runs on
SigmaJunction is an engineering firm: we design, build and operate custom platforms, applied AI and business automation - the systems your business runs on. Senior teams only. Milestone billing, fixed estimates that hold, and equity terms when we believe enough to co-own the outcome.
A small firm with a sharp method, on purpose
Three practices cover everything we take on. Each one starts with the same question - what does this system earn or save - and ends with software running in production.
Custom software development
Operational platforms, customer-facing products, internal tools, legacy rebuilds - whatever shape the system takes, it's built around your workflows instead of forcing them into someone else's SaaS. We favour proven technology your future hires already know, and we document everything for a clean handover.
Explore custom software →AI solutions
Document intelligence, copilots, agentic workflows - AI in whatever form your process needs, deployed with an evaluation harness built from your own cases, confidence-based routing to humans, and a business metric every rollout answers to. No demos that die in the pilot phase.
Explore AI solutions →Business automation
Every re-typed order and manually reconciled invoice is payroll spent on work a system should do. We map the process, price the manual work in hours, and automate it across the tools you already use - with monitoring, retries and human checkpoints on exceptions.
Explore automation →Three ways to pay. One way to work.
The team, the process and the quality bar are identical in every model - only the commercial structure changes.
| Feature | Dedicated team | Per project | Partnershipequity |
|---|---|---|---|
| How you pay | Fixed monthly rate per squad | Per accepted milestone | Full equity, or reduced price + equity |
| Best for | Long roadmaps, ongoing products | A v1, a rebuild, a bounded system | Founders with traction, no product yet |
| Commitment | Quarterly, 30-day exit | Per milestone - stop any time | Long-term, cap-table aligned |
| IP ownership | Yours from day one | Transfers per paid milestone | Per shareholder agreement |
| Learn more → | Learn more → | Learn more → |
No discovery theatre. Four phases, each with an exit door.
You can stop after any phase and keep everything produced to that point - the diagnosis, the estimate, every shipped milestone.
See the full process →- 1Diagnose free · 1-2 weeks
A working session on your operations, numbers and constraints. If software isn't the answer - and often it isn't - we say so and part as friends.
- 2Estimate free · 1 week
Architecture, milestones, timeline and cost - plus the business metric the system will be accountable to. The same estimate underwrites all three pricing models.
- 3Build weekly demos · milestone billing
Working software in your hands from week two. A shared channel with the actual engineers, a demo every Friday, and milestones you accept - or don't - before paying.
- 4Operate retainer or handover
Monitoring, documentation and a 90-day warranty ship with every system. Then we either run it on a retainer or hand it cleanly to your team - including hiring help.
For a few companies a year, we build for ownership instead of invoices
Send the request. We estimate the build exactly as we would for a paying client - that number becomes the basis of the equity conversation. Then one of two structures: the full build value as equity, or you pay under price and the discount converts to equity.
How partnership worksField notes from the build
Where we've shipped
Operations-heavy industries where software leverage is easiest to measure.
Logistics & freight →
Quoting engines, dispatch boards, carrier integrations, invoicing flows.
iGaming & betting →
In-play odds engines, trader risk dashboards, sub-second settlement, RG controls.
Legal services →
Document intelligence, contract review AI, matter workflows.
Healthcare →
Patient intake platforms, scheduling, compliance-aware data flows.
Retail & e-commerce →
Order-to-cash automation, inventory sync, multi-store operations.
Financial services →
Client onboarding, KYC document flows, reconciliation.
Manufacturing →
Production planning, shop-floor data capture, quality and maintenance flows.
SaaS & product companies →
v1 builds for founders, dedicated teams behind growing products, AI features with evals.
All industries →
Including the ones not listed - we take on any operation.
Standing commitments, every model
The estimate holds
If we under-scoped, the overrun is ours - never discovered on an invoice.
90-day warranty
Defects in anything we ship are fixed free after acceptance.
First invoice after first delivery
No large deposits; payment follows working software.
Exit at any phase
Stop after any milestone and keep everything produced.
Thirty minutes with an engineer.
An honest answer.
Whether and how we'd take your project on - including "don't build this."