Code that moves business forward

We build business software: design, development, launch, and support.

Specifics below

Platforms. Payments. Data. Infrastructure.
Everything your business runs on — designed, shipped, and looked after by one team.

Problem
Approach
Outcome

Sound familiar

The system works, and nobody owns it

Payments fail for a share of your users and nobody can explain why. The website sits on a server whose credentials left with a former contractor. The CMS has not been updated in two years, the infrastructure bill grows faster than revenue, and a release that used to take a day now takes a week of sign-offs.

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The server, the domain and the site run unattended: nobody remembers when a backup was last restored
Incidents keep repeating, and the cause is always «somewhere in the integration»
A provider, a bank or a large customer asks for compliance evidence and there is nothing to send

Problem
Approach
Outcome

How the work runs

Diagnosis first. Scope second.

We do not start with a development estimate. We start by reading the code, the data model, the data flows, the infrastructure and the invoices for it. First it becomes clear what is broken and what it costs the business; scope is discussed only after that.

You talk to the engineer, not to an account manager
Findings arrive ranked and costed, not as a forty-page document nobody reads
Code and infrastructure stay in your repositories and your accounts

Problem
Approach
Outcome

What you are left with

A decision based on facts, not on a feeling.

After the audit you hold a risk map, a prioritised plan and an estimate for the next step. What happens next is your call: do it in-house, hand part of it to us, or do nothing — but the decision rests on findings rather than on a feeling.

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A plan your own team can execute without us
A clear price for the next step before that step begins
Access, domains and servers stay yours; documentation and handover are part of the work

Services

What you can buy

The audit comes first for a reason: it is the cheapest way to test both the problem and the contractor at the same time. After it come five areas of work, from a product platform to administering a website in production.

/01

Audit and consulting

You learn what is actually broken, what it costs you, and in what order to fix it.

We read the code, the architecture, the data model, the infrastructure, the payment flow and the provider invoices. Findings come back as a report with priorities and an estimate. From there we can stay next to your team: pulling architecture decisions apart before they turn into code, running code review, standards and incident analysis. The audit does not commit you to development — the plan is written so your own team can act on it.

A report of findings and what each one costs the business
A risk map: where it breaks, what leaks, how urgent it is
A work plan ordered by priority, with an estimate for the next step
Standards, checklists and reviews your team keeps

Start with an audit

/02

Platforms, systems and integrations

A product that passes provider review and holds under load.

We design and build product platforms, internal systems and mobile apps: service boundaries, data model, REST, GraphQL and gRPC interfaces, queues and background processing. We connect the system to external services and to whatever you already run. Payments and regulated data are the most demanding special case: Stripe, PayPal, Apple Pay and Google Pay, 3DS v1 and v2, transaction cascades, KYC with government API integration, Web3 bridges and crypto payment acceptance.

Working code in your repository from day one
A documented API: OpenAPI, versioning, rate limits
Integrations with failure handling, retries and reconciliation
Deployment and operations instructions

Discuss the problem

/03

Data and pipelines

Data arrives where it is needed, complete, on time and in a shape you can read.

We build data processing pipelines: ingestion from sources, cleaning and transformation, streaming and batch processing, analytical marts. We connect systems that until now exchanged spreadsheet exports. We work with PostgreSQL, ClickHouse and Kafka, and with vector indexes where embeddings and semantic search are required.

A flow map: what comes from where, how often, and what happens on failure
A pipeline with reprocessing and completeness checks
Marts and exports that reporting can actually sit on
System-to-system integrations instead of manual exports

Discuss the problem Business process automation →

/04

Infrastructure and DevOps

Infrastructure described as code, deployed repeatably and predictable in cost.

We design and deploy infrastructure: networks and environments, containers, orchestration, infrastructure as code, CI/CD pipelines. We set up monitoring and logging on Prometheus and Grafana, dig into bottlenecks in the database and the queues, measure and bring down the cloud bill, and build in resilience and a recovery procedure.

Moving from AWS and hosting abroad to a provider in Belarus, with a verified copy and a way back
Infrastructure as code: Terraform, Ansible, a repeatable environment
A CI/CD pipeline with builds, tests and rollback
Metrics and alerts on the things that genuinely break
Backups and a recovery procedure that has been tested

Discuss infrastructure Moving hosting to Belarus →

/05

Websites and CMS

A website you can edit yourself and never worry will simply stop loading.

We build corporate websites, landing pages and shops, work with the client's existing CMS, and connect the site to internal systems: CRM, accounting, payments, analytics. The site gets the same engineering standard as a payment platform: code in your repository, separate environments, backups, uptime monitoring and a proper handover.

The site in your repository, with environments and a change history
Content editing without a developer
Integrations with CRM, accounting, payments and analytics
Load speed, semantics and correct markup for search

Discuss the website Website development →

/06

Administration and support

Servers and websites get an owner, and incidents get an address.

We take servers, infrastructure and websites into maintenance, including ones we did not build. We update the system and the CMS, close known vulnerabilities, renew domains and certificates, run backups and verify restores, watch availability and respond to incidents. The maintenance procedure and the response rules are agreed before the work begins.

An inventory: servers, domains, certificates, access, dependencies
Updates and known-vulnerability fixes on an agreed schedule
Backups with restores verified regularly
Uptime monitoring and incident reviews that end in a cause, not an apology

Hand it over to us Server and website administration →

Go
Kotlin
Java
C# / .NET
Python
Ruby on Rails
Node.js
TypeScript
React
Next.js
Swift
Android
Xamarin
WordPress
Drupal
GraphQL
OpenAPI
Telegram
PostgreSQL
ClickHouse
Redis
Kafka
Docker
Kubernetes
AWS
Linux
Nginx
Terraform
Ansible
GitLab CI
GitHub Actions
Prometheus
Grafana
OpenAI
Anthropic
Gemini
CUDA
Stripe
PayPal
Apple Pay
Google Pay
Web3

Products

Four systems we built and operate ourselves

Each one has users, billing, support and other people's data we are answerable for. That is a different class of evidence from a portfolio screenshot.

WidgetsAI

SaaS · review widget

Reviews from five platforms in one widget on your site

Yandex Maps, Google Maps, 2GIS, Ozon and Wildberries in one block
One script tag — no plugins, no template edits
AI report: topics, sentiment and month-over-month trend

Free planInstall it free →

Synthra Studio

AI · agent platform

AI agents that answer from your documents and act in your systems

Answer from your knowledge base, always with the source
Call your APIs and CRM — not just hold a conversation
OpenAI, Anthropic, Gemini or local models — your pick
Your logo, domain and SSO; PII masking and team roles

On request

TKO Map

B2B · web and Android

Contracts, buildings and routes on a map instead of a spreadsheet

Buildings and contracts on a 2GIS map with statuses
Excel import and digital waybills instead of paper
Android app for field crews

Demo on requestOpen the map →

MInfra

Android · for engineers

An infrastructure control centre in the engineer's pocket

Domain and SSL expiry, DNSBL, server metrics
SSH and SFTP with quick commands, MTR and a port scanner
Data stays on the device, behind a PIN

FreeGet it on Google Play →

Book a consultation →

How it goes

Five steps, each leaving an artifact

You see a result at every step instead of months later. How long each step takes depends on the size of the system and the depth of access — we agree that on the first talks.

01
The talks
We go through the problem, the constraints and what you have already tried. Architecture and risk come up immediately, not after signing: this is two engineers talking, not a capability pitch.
02
NDA and access
The NDA is signed before we receive access to code, data or infrastructure. Then we look at the repositories, the data model, the monitoring dashboards and the provider invoices.
03
Audit and estimate
We collect the findings, weigh what each one costs the business, and order them by priority. The estimate is produced once the scope is understood, not before.
04
Sprint work
We take the top items on the plan. Code lives in your repositories from day one and infrastructure in your accounts. Each sprint ends with something that works, not with a status update.
05
Handover
We write the documentation, hand back the access, and walk your team through how it works and what to do during an incident. The project has to survive without us — that is a condition, not an option.

Questions

What people ask before the first talks

How does an engagement with Piron Dev start?

An engagement with Piron Dev starts with a technical audit rather than a development contract. The audit ends with a findings report, a risk map, a prioritised plan and an estimate for the next step. The plan is written so that the client's own team can execute it.

Does the audit commit me to a development contract?

No, a Piron Dev technical audit does not commit the client to development work. The report and the plan belong to the client, who is free to execute them in-house, hand them to another contractor, or do nothing. The format and scope of the audit are agreed before it begins.

What does a project cost?

A Piron Dev project is priced after the audit, once the scope is understood. Any number quoted before the audit would be invented: the gap between fixing payment failure handling and rebuilding a data model is a factor of tens. The cost of the audit itself and the commercial model are agreed on the first talks.

Who owns the code and the infrastructure?

The client owns the code and the infrastructure from day one. Repositories and cloud accounts stay yours, and Piron Dev works inside them under the access you grant. Documentation and knowledge transfer to your team are part of the work and are not billed separately.

Do you sign an NDA?

Yes, an NDA is signed before Piron Dev receives access to code, data or infrastructure. The problem can be discussed in general terms before signing. Access is granted on a least-privilege basis and revoked once the work is finished.

Can you work next to our team instead of replacing it?

Yes, Piron Dev audits and consulting are designed to run alongside an existing team. It is an outside engineering view on architecture, code review and standards, not a substitute for your developers. The decision stays with you: we bring the alternatives and the cost of each.

Which payment systems do you work with?

Piron Dev integrates Stripe, PayPal, Apple Pay and Google Pay, and implements 3DS v1 and v2 along with cascading transaction logic. KYC with government API integration and crypto payments — Web3 bridges for moving funds, and smart contracts — are handled as separate workstreams. The work is done with PCI DSS and GDPR requirements in scope.

Do you build websites and work with CMS platforms?

Yes, Piron Dev builds corporate websites, landing pages and shops, and works with a client's existing CMS. A website is run by the same rules as our other systems: code in your repository, separate environments, backups, uptime monitoring and integrations with CRM, accounting, payments and analytics. Which CMS a project uses is decided during the audit, along with whether developing the current system or migrating the content is cheaper.

Will you administer infrastructure and websites that you did not build?

Yes, Piron Dev takes over servers, infrastructure and websites built by another contractor. We start with an inventory: servers, domains, certificates, access, dependencies and the state of the backups. After that we agree the update schedule, the incident response rules and the boundaries of responsibility — before maintenance begins, not after the first outage.

Can I buy one of your products and have it customised?

Yes: Piron Dev products can be used as they are, with customisation ordered separately. Synthra Studio and TKO Map already support white-label, per-organisation data isolation, roles and SSO, so customisation does not start from zero. Adapting a product to your process, installing it on-premise and integrating it with your systems is development work.

Who is the contracting party?

The contracting party is Individual Entrepreneur Pavel Efimenko, registration number 194032002, Republic of Belarus. Work is done under contract, settled through an account at Priorbank, with closing documents issued. The owner-engineer runs the project: the person making the architecture decisions is the person you talk to.

Get in touch

Let’s start with a conversation about your system

Tell us briefly about the task and what you have already tried. The first step is a technical audit, not a development contract.

What happens next

1
You send a request
A few lines about the task and a contact for the reply: here, on Telegram or by email.
2
A call with the engineer
We go through the task, the constraints and what you have tried.
3
Audit and plan
A report with findings, priorities and an estimate for the next step.

Pavel Efimenko

Founder of Piron Dev, engineer

LinkedIn GitHub

We use your contact only to reply to the request and never share it. You will hear back from the engineer who makes the architecture calls on your project, not from a sales manager. Tax ID (UNP) 194032002.