When a monolith becomes a bottleneck, starting from scratch is not always the answer.

One of the hardest challenges in software development is modernizing a system that is already running at scale and has become critical to the business.

In this case, we worked with a platform processing millions of orders for a large restaurant network. As data volumes grew, performance issues started to appear: searching through order history could take 25–30 seconds.

The solution wasn’t a complete rewrite. Instead, we evolved the system step by step: optimized data processing, moved search capabilities to Elasticsearch, started breaking down the monolith, and built a more flexible architecture for future scaling.

The result: search response time dropped to 250–300 milliseconds, while the platform gained the foundation needed for further growth.

A good example of why legacy systems are not always something you need to replace. Sometimes, they are systems you need to evolve in the right direction.

More technical case studies and engineering stories:
https://evrone.com/

Can you publish 5–6 videos a week without a team of scriptwriters?

We decided to find out.

That's why we built Screenwriter – an AI-powered assistant that analyzes massive amounts of information, identifies the most relevant topics, and helps create scripts and interview briefs.

In its first two months, Screenwriter helped us produce around 25 video episodes. One of our new shows also surpassed 240,000 views in less than six weeks.

But AI isn't replacing creators. It takes care of the most time-consuming parts of pre-production, while every script is still reviewed, refined, and finalized by the host.

In our latest article, we explain how Screenwriter works, why we built it around multiple AI models, and how it has transformed the economics of content production.

Read the full story here: https://evrone.com/blog/screenwriter

How do you migrate dozens of services to a new infrastructure without taking down production?

In the Wayo* case study, we had one month to do it.
The task wasn't just about moving infrastructure from an old Kubernetes cluster to a new one. The services also had to be adapted to an updated internal engineering platform.

The most interesting part was the dependencies. Each service had its own set of configurations, databases, Redis and other KV stores, brokers, internal services, and external APIs. Moreover, some connections weren't obvious from the original configuration and were only discovered during analysis.

So for each service, we defined a unified preparation process and a set of readiness criteria: startup, health checks, accessibility within the cluster, connections to storage systems and APIs, logs, and key user scenarios.

In production, the old and new versions ran in parallel for some time. First we validated the new version, then switched traffic over to it, and only after a monitoring period did we decommission the old one. If something went wrong, we had the option to roll back.

By the end of the fourth week, all services scheduled for migration had been moved to the new platform and launched in the new cloud environment. The user-facing application continued running without interruption.

We covered the dependency audit, the migration process, and the traffic switchover in detail in our case study: https://evrone.com/cases/wayo 

And what stage of migration usually turns out to be the trickiest for you?

*The company name and certain identifying details have been changed because the project was completed under an NDA.

There are already so many AI agents that choosing one has become an engineering task in its own right.

OpenAI Agents, Claude, Copilot Studio, Agentforce, CrewAI, AutoGen, and several others – each comes with its own stack, architecture, use cases, and limitations.

Instead of another “top 10 best AI agents” list, we looked at what each tool is actually good for: where it fits, where its limitations start to show, and when a ready-made agent might not be the best option at all.

We’ve put together 10 AI agents and platforms worth knowing in 2026.

If you’re exploring AI agents for your projects, this overview will help you get a clearer picture of the options available today.

Read the full overview on the Evrone website: https://evrone.com/blog/top-10-ai-agents-business-2026 

Have you already worked with AI agents? Share your experience in the comments.

What happens when a logistics system has to handle very different data loads at the same time?

In this project, data from different sources was processed synchronously, creating uneven loads on the database. During peak workloads, this could slow down or even block the database and disrupt systems that depended on it.

We introduced an intermediate Python service and Kafka. NiFi sends messages to the appropriate Kafka topic, while our service retrieves them in batches, applies business rules, and loads the results into the database. This made the workload more predictable and the architecture easier to scale.

The same data bus was later reused for two more tasks: integrating a new B2B customer through data mapping and building a public shipment tracking service with its own database.

The interesting part wasn't just adding Kafka. It was finding a way to stabilize the existing data flow and then reuse that infrastructure for new integration scenarios.

Full technical case:
https://evrone.com/cases/edi-for-logistics

What if AI could help a technical interviewer prepare for an interview before the candidate even joins the call?

At Evrone, we built ArgusHire – an AI assistant that analyzes a CV against the project requirements and helps prepare an interview plan, including the topics and questions worth focusing on.

After the interview, ArgusHire analyzes the transcript, evaluates the candidate’s answers, and helps compare multiple candidates. It also analyzes the interviewer’s performance – how thoroughly the planned topics were covered and how closely the conversation followed the original plan.

Now, a bit about the engineering behind it.

The stack includes Ruby on Rails 8, Sidekiq + Redis, PostgreSQL with JSONB, and Next.js 16 / React 19 / TypeScript. Long-running AI tasks run in the background, so operations like CV and transcript analysis don’t block regular HTTP requests.

The AI layer is built with ActiveAgent and a custom model-calling pipeline. The business logic isn’t tied to a specific LLM API: out of the box, the system works with GigaChat-2-Max and deepseek-v4-pro, while the OpenAI-compatible API makes it possible to connect cloud services, corporate AI gateways, or locally deployed models via vLLM, LocalAI, and Ollama.

For each AI task, we store information about the model and the provider used to run it. This makes it possible to compare results and experiment with different models.

Another important component is custom prompts. Each workspace can have its own prompt templates for CV analysis, interview preparation, transcript analysis, and
competency assessment – with versioning, and without code changes or a new release.

And this isn’t an experiment in a vacuum: we use ArgusHire in real technical interviews at Evrone, compare its results with assessments from our technical specialists, and use the findings to refine the rules and prompts.

Learn more about the product and its architecture: https://evrone.com/blog/argushire

There are things you almost always want to add to an MVP. And almost always shouldn’t.

Another user role.
Another integration.
A proper dashboard – “let’s build it now so we don’t have to redo it later.”
An AI feature that users will definitely love.
And, of course, a mobile app – “since we’re building the product anyway.”

That’s how an MVP slowly turns into a full-scale product – only with tighter deadlines and a constantly growing budget.

There’s an opposite extreme, too: building it so quickly and simply that a couple of months later, nobody wants to touch the code.

A good MVP isn’t about writing the minimum amount of code. It’s about finding the smallest technically sensible scope that’s enough to validate the core product hypothesis.

And that means developers have to think not only about how to build something, but also whether it makes sense to build it at all – right now.

What can safely wait? Where is a temporary workaround acceptable? Which decisions will be expensive to change later? And what should be part of the architecture from day one?

We’ve put together a detailed guide to planning an MVP – from defining the first version and prioritizing features to architecture, team setup, budget, metrics, and what comes next.

If you’re currently designing a new product or debating what should make it into v1, there’s plenty here to think about: https://evrone.com/blog/how-to-plan-mvp

A vague task leaves too much room for interpretation – and that becomes especially noticeable when AI is writing the code.

Spec-Driven Development takes a more structured approach: define the requirements, constraints, and expected behavior first, and use them as a reference during implementation.

In the article, we look at this through a practical example of integration monitoring. What exactly should the monitoring system show? What should happen when there’s no data? What counts as an error? Where does reporting a problem end and fixing it begin? Defining these details upfront gives the AI agent less room to make assumptions.

That doesn’t mean writing huge specs. The level of detail should match the complexity and risks of the task.

We also cover two more practical cases: PDF generation and a logistics status system.

How do you usually work with AI agents: define the requirements in detail upfront, or refine the result as you go?

When multiple teams work on a large product, technical problems don’t always start with the code. Sometimes the bottleneck is that requirements and product knowledge are scattered across people and teams.

For one of the largest restaurant chains, we helped restructure systems analysis: documenting business processes in Confluence, introducing SRS and technical specifications for new features, and creating a shared glossary across departments.

This turned analysis into more than documentation before development. It became a layer connecting business processes with engineering teams.

For developers, that means fewer ambiguities in requirements. For analysts, a consistent approach to working with the system. And for the product, a more predictable path from an idea to implementation.

Read more about this project and other engineering cases from Evrone: https://evrone.com/