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AI Engineering & Product Studio

We build the
software — and the
growth behind it.

See our cases
Already building or running something
Engineering that scales

Build, modernize and automate — we join your team or take a whole workstream.

Custom softwareCloud & data infrastructureArchitecture & modernizationAI automation & agentic systems
Starting something new
From idea to MVP to first clients

Test the idea, build the MVP fast, then win your first customers.

ValidateBuild MVPFirst customers
15 yrsDelivering software products
26Cases across 10 industries
10+Engineers we can deploy per project
2–6 wksTypical first engagement
Services

Eight ways we build, move and run software.

Fifteen years of commercial development behind every engagement.

All 8 services

Software & product development

Web and mobile products, SaaS, APIs and backends, from the first working version to scale.

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Cloud, infrastructure & data

Cloud architecture, DevOps and data platforms that keep working under real load.

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Architecture & modernization

Untangle, rebuild and migrate systems that already run, without stopping the business.

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AI, automation & agents

AI agents, copilots and workflow automation built around real workflows, not demos.

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Consulting & product design

Discovery, requirements, UX and architecture planning, before and during the build.

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Enterprise systems & integration

API integrations, process automation and custom business systems, including our own CRM.

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Quality, security & compliance

Testing, security reviews and technical readiness for audits.

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Managed services & support

Maintenance, operations and support once the system is live.

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How we deliver

The same quality gates, reached faster.

Read our methodology
our approach

However you run the work, we build with an agentic harness.

AI coding agents write the code inside a controlled loop. Specs go in, automated tests and evaluations decide what passes, and a person reviews before anything ships. All of our delivery now runs this way: the same quality gates, reached faster.

  • Specs before code. Agents work from what was agreed, not from guesses.
  • Tests and evaluations as the gate. Failures go back to the agents.
  • A person approves what ships. Nothing reaches production unreviewed.
YOUR PROCESSScrumKanbanSAFeWaterfall / stage gatesall of them run onOUR AGENTIC HARNESSSpecwhat to buildAgentswrite the codeTests & evalsthe gateHuman reviewbefore it shipsfailures go back to the agentsGuardrails · tooling · monitoring
Your process
ScrumKanbanSAFeWaterfall / stage gates
↓ all of them run on
Our agentic harness
Specwhat to build
↓
Agentswrite the code
↓
Tests & evalsthe gate
↓
Human reviewbefore it ships
Guardrails · tooling · monitoring
Failures go back to the agents.
Technologies we build with
Build
Python
Node.js
PHP
Symfony
Angular
Swift
Unity
PostgreSQL
Docker
GitHub
Data & AI
Apache Kafka
ClickHouse
Apache Iceberg
Apache Airflow
OpenAI
Claude
LangChain
PyTorch
TensorFlow
n8n
Supabase
Proof

Work you can open and check.

Twenty-six cases across ten industries, grouped by the kind of problem we solved.

All case studies
200,000
users in three months
easy10 language-learning platform
Shipped fast enough to grow, and fast enough to break: built, scaled and later reengineered.
1+ TB/day
processed in real time
Urban-Intel data platform
A real-time platform turning a terabyte of daily data into operational decisions.
4×
lower cloud cost
Telecom telemetry and accounting
Real-time telemetry, accounting and OLAP for a top-three telecom provider.
4
pilot success criteria
Legal operations AI pilot
Accuracy, review time, adoption and exception handling, defined before the pilot.
Browse all 26 by taskArchitecture & Reengineering15Product & MVP12Data, AI & Automation11Platforms & Marketplaces8Scale & Infrastructure7Teams & Delivery6IoT & Computer Vision5Demand & Acquisition4
Starting something new?

From idea to first customers, in four stages.

Most new products start at Validate and move right. You can enter at any stage.

Where are you now? See all offers
Stage 1

Validate

Test the idea before you commit to build it.

  • Validation Sprint, usually 2–3 weeks
  • Demand Validation Sprint
  • MVP Diagnostics & Repositioning
Built withConsulting & product design
Stage 2

Build

A first version built to last, with the proof still attached.

  • Validation MVP Build
  • V1 Product Build
  • AI Workflow / Internal Product Build
Built withSoftware & product developmentAI, automation & agents
Stage 3

Grow

First paying customers, pilots and a repeatable path to them.

  • First Paying Customers Program
  • Pilot-to-Revenue Program
  • Developer Ecosystem Growth Program
Built withSales BlackboxDemand & Acquisition cases
Stage 4

Scale & Partner

Modernize what works, and bring partners in.

  • AI / Data / Cloud Modernization Engagement
  • Market Entry Proof Program
  • Portfolio Proof Program
Built withCloud, infrastructure & dataArchitecture & modernization
Sales · our own product

Sales Blackbox

Conversation intelligence for phone-heavy sales teams. It captures what customers say, scores every call, and turns each conversation into CRM context, follow-up tasks and coaching.

CaptureUnderstandAct
Open Sales Blackbox

We built it, we run it, and we use it to rethink sales processes, for ourselves and for clients.

Who does the work

A small senior team, backed by a bench of 20+.

The founders hold the product and engineering logic and stay hands-on from the first call to the handover. A squad of 10+ engineers can be assembled for a single project, drawn from a bench of 20+ members.

2founders
20+members
2advisors
Founder
Kirill ArtsymeniaProduct, validation and go-to-market
Co-founder
Anton GrievTechnical and execution work
Remote-first by design
Eight cities, UTC−8 to UTC+8
Where we work
How an engagement works

Three ways to work with us.

Whatever the service line, the format is one of these.

Read our methodology
Fixed scope

A defined project

A clear scope and an end date: a first build, a modernization, an AI workflow. Fixed-scope engagements start at $4,500, usually 2–6 weeks.

Offers: V1 Product Build · AI / Data / Cloud Modernization Engagement
By the hour or monthly

Extend your team

Senior engineers join your team and work in your process. Hourly work has no minimum; monthly support suits longer work.

Offers: Product Engineering Support
3-month minimum

A dedicated team

A multi-role team on one mission, with its own delivery cadence, working as an extension of yours. Three months minimum, then month to month with 30 days’ notice.

Offers: Dedicated Product Squad
Larger work starts with a short paid discovery. The result is a clear plan, not a strategy deck.
From the blog

Fresh thinking from inside the work.

Each article is tagged with the service it relates to.

All articles
Software & AI

Building AI-Native Products in 2026

What AI-native products are, how they differ from AI wrappers, and how to validate and build them without overbuilding.

Read the article
AI, automation & agents

Agent Governance Is Becoming Product Management

As agents begin performing real work, governance needs product discipline: owner, scope, permissions, review and retirement.

Read the article
Cloud, infrastructure & data

The Data Layer Is Becoming A Trust Layer

When AI acts from company data, the data layer needs provenance, freshness, ownership, permissions and review.

Read the article
FAQ

Questions before you write to us.

What does Proof Engine do?
We are an engineering-first studio. We build software products, platforms, data systems and AI automation, and we keep the work tied to evidence about users and buyers, so what ships is what the evidence earns.
Do you take pure development work?
Yes. If the spec is clear, we build to it. If it is not, we say so, because building the wrong thing well is still the wrong thing.
Is Proof Engine still a validation studio?
Validation is one way in, not the whole studio. If you are starting something new, a short Validation Sprint comes first. If you already know what to build, we start building.
How much does it cost?
Fixed-scope engagements start at $4,500 and usually take two to six weeks. Hourly work has no minimum. A dedicated team is three months minimum, then month to month with 30 days’ notice. Larger work is scoped custom after a short paid discovery.
Who owns the code and the IP?
You do. On paid work the code and the intellectual property transfer to you.
Can you extend our team?
Yes. Product Engineering Support puts senior engineers into your process month by month, and a Dedicated Product Squad gives you a multi-role team with its own delivery cadence.
How long does a typical engagement take?
A first engagement usually takes two to six weeks and ends with a clear go or no-go, a working version, or a plan you can act on.
Where are you based, and which time zones do you work in?
We are remote-first by design. People work from San Diego, Buenos Aires, Porto, Rome, Warsaw, Belgrade, Abu Dhabi and Bali, across UTC−8 to UTC+8. Tell us where your team sits and we will say plainly how the hours overlap.

Tell us what you need built, fixed or decided.

Describe the product, the system or the problem. We reply with a clear next step, usually within 24 hours.

Discuss your projectBook a routing call