Deventra
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Discuss a project
Software engineering

Custom software development for problems where an off-the-shelf solution is not enough.

Mobile apps, Windows software, websites and web services, backend, system software and hardware integrations. You can come with an idea, a problem or an existing product.

We explain complexity in plain language first and define what actually needs to work. Architecture, technology and engineering detail come after the problem is understood.

Discuss the task ↗ Explore services
01From scratch — idea to release02Existing product — code and legacy03Integrations — APIs, devices, services
Designed as one connected system DEV / 01
01 · Need What has to work Goal, user, constraints, existing infrastructure
02 · ProductOne connected product
Mobile Windows Web
LogicDataStateAccess
03 · Environment Connected to the real world Backend · API · CRM · devices · legacy · Telegram / MAX
clear user flow predictable failure behavior room to evolve
No complete specification requiredStart with the problem
No technology for technology’s sakeArchitecture before stack
Not only the happy pathNetwork failures and edge cases are part of the product
Services

Each area is a distinct engineering discipline

A mobile app, Windows system, website, backend or hardware integration are different kinds of work. Each service has its own page, scope and engineering depth.

Typical starting points

You do not need to know the technical name of the problem

Describe the situation in ordinary language. We will translate it into architecture, stages and a result you can verify.

A

“We have a product idea and need to understand how to build it.”

We break the idea into user scenarios, components and a realistic first stage.

New product
B

“The application already exists, but every change feels risky.”

We understand the build and architecture, isolate risks, fix fragile areas and then move forward.

Existing / legacy
C

“We need the app, server and hardware to work together.”

We define component boundaries, data exchange, failure behavior and diagnostic points.

System integration
The Deventra principle

Complex ideas, explained simply first.
Engineering detail for the people who need it.

A client should not need to say “idempotency”, “reconnect” or “protocol adapter”. They need to understand the outcome. The technical team can then see exactly what makes that outcome reliable.

What the person or business needsWhat we design underneath
The app should still be useful without internet.Offline cache · operation queue · state synchronization · reconnect
The device should connect reliably and make sense to the user.BLE / LAN · timeouts · state machine · protocol adapter · diagnostics
An update must not break people already using the product.Contract versioning · migrations · regression tests · backward compatibility
When something fails, we need to know what happened and where.Structured logs · correlation ID · health checks · observability
For technical teams

If the details matter, this is how we think about the system

If you only need the outcome, you can skip this section. For a CTO, tech lead or engineer, this is where the interesting part begins.

01 Architecture

UI, domain logic, data and integrations have clear boundaries. External SDKs and legacy are isolated behind adapters, and contracts are explicit.

Boundaries · adapters · contracts · versioning
02 Reliability

Timeouts, retries, offline behavior, partial failures and state recovery are normal design scenarios, not emergency patches.

Retries · idempotency · offline · recovery
03 Integrations

APIs, devices and external services should not spread their peculiarities through the whole product. Complexity stays at the boundary.

REST · WebSocket · BLE · protocols · legacy
04 Operations

Logs, diagnostic events, tests and safe updates are designed before release, not after the first serious incident.

Logs · tests · diagnostics · migrations
How we work

Five clear steps instead of “development magic”

Every stage produces something you can review, discuss and adjust before the project moves too far in the wrong direction.

  1. 01

    Understand the problem

    What should change for the user or the business.

  2. 02

    Define the system outline

    Components, integrations, risks and the boundary of the first stage.

  3. 03

    Show the solution

    Architecture and scenarios without requiring anyone to read code.

  4. 04

    Build and verify

    Iterations, tests, edge cases and intermediate results.

  5. 05

    Release and evolve

    Launch, diagnostics, updates and the next product version.

What “professionally built” means to us

Not only impressive in a demo.
Predictable in real operation.

01Problems can be diagnosed

Logs and state provide evidence instead of guesswork.

02Changes do not destroy the foundation

Component boundaries and tests protect critical scenarios.

03Failure is a designed scenario

Lost connectivity, unavailable APIs and repeated requests should not turn into chaos.

04Technology is justified by the task

We do not add complexity for a fashionable stack or a prettier architecture diagram.

Roman Nesterov, founder of Deventra
Who is behind Deventra

Roman Nesterov — founder and software engineer

Working with computers and programming since the early 1990s and with Android since 2019. Experience includes mobile apps, networking, SIP/VoIP, APIs, web/backend and connected hardware.

For a client, that means one simple thing: describe the difficult problem in normal words first. We can go deep into the engineering after the desired outcome is clear.

since 2019 Android1990s first programshands-on systems thinking
About the founder ↗
Start a project

Describe what needs to work.

No technical vocabulary and no finished specification required. Tell us the task, what already exists and what result you need. We will unpack the technical side from there.

Remote-first collaboration · clear communication and project stages
Message viaTelegram↗ Message viaMAX↗ Send emailsoftware@deventra.ru↗