Custom software · Estonia
Custom software development, built fast and priced small
From MVP to production — we build, test, monitor and maintain web apps, APIs and bots for small teams and founders.
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What we do
Everything a small product needs, from the first prototype to years of quiet, reliable operation.
Custom apps
Web apps, APIs and backends, built to order.
Full-stack applications scoped to what you actually need — no bloated frameworks, no months of discovery, no oversized team on the invoice.
Learn more →MVP & prototypes
Test the idea before you bet on it.
A working first version with a fixed scope and a fixed price, so you can put it in front of real users quickly and decide what comes next.
Learn more →Software testing
Automated and manual QA.
Unit, integration and end-to-end tests, regression suites in CI, and hands-on testing before releases — for code we wrote or code you already have.
Learn more →Monitoring
Know it’s down before your users do.
Uptime checks, SSL and domain expiry, performance and error alerts straight to Telegram or email — on the same Infra Tracker we use for our own products.
Learn more →Error analysis
From stack trace to root cause.
We dig through logs, traces and crash reports, find why things break, fix it, and write up what happened so it doesn’t happen again.
Learn more →Support & maintenance
We stay after launch.
Updates, dependency upgrades, small features and fixes for running apps — including projects left behind by a previous developer.
Learn more →Code & security audit
A second pair of eyes on your codebase.
Code review, vulnerability checks and a prioritised list of what to fix first — for web apps, APIs, and EVM and Solana smart contracts.
Learn more →Lower hosting costs
Move to the edge, pay less.
We migrate apps to edge and serverless platforms, so small services cost next to nothing to keep running — the way we run our own.
Learn more →Integrations, bots & AI
Connect what you already use.
Telegram bots, third-party APIs, payments, and AI features built on large language models — added to your product without a rewrite.
Learn more →Smart contracts & blockchain
EVM, Solana and Cosmos SDK.
Smart contracts for EVM chains, Solana programs, and private blockchain networks on Cosmos SDK, from design through deployment.
Learn more →02
How we work
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Fixed scope, fixed price.
We agree on what gets built and what it costs before we start. No open-ended hourly billing, no surprises on the invoice.
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Weeks, not months.
A small team and a lean stack mean you see working software early and often, not a slide deck.
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We stay after launch.
Tests, monitoring and error analysis are part of the job, not an upsell. We keep an eye on what we ship.
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Built and run by us
Proof that we ship and operate: five products we built, launched and keep running ourselves — a SaaS platform, a browser game, a security digest, a preparedness course, and a daily grants feed.
fewbase
Simple tools for one person, behind one account.
Five small web tools, one job each: time tracking, subscription tracking, uptime and SSL monitoring, client invoicing and customer support. Passwordless sign-in, free plan.
fewbase.com →Drones War
Turn-based hex strategy in the browser.
Scout with drones, hold ground with infantry, and take the enemy HQ against an AI that fights back. Free, single-player, nothing to install.
drones-war.com →Baltic Monitor
A daily read on Baltic security.
Today’s escalation index and the events behind it, in English, Estonian, Russian and Polish.
baltic-monitor.com →Pääste Plaan
Civil preparedness course for Estonia.
What to do, what to pack and where to go in the event of a military conflict, built on official Rescue Board and Defence League guidance.
paaste-plaan.eu →DevGrants Daily
Grants and hackathons for developers, checked daily.
Grants, accelerators, hackathons, bounties and fellowships, collected every day from the organizers’ own pages — with deadlines and an RSS feed.
devgrantsdaily.com →Case studies: fewbase · Baltic Monitor · Drones War · DevGrants Daily
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Questions we get asked
How long does a project take?
It depends on the scope, which is why we pin the scope down first. A focused MVP is measured in weeks, not months, and you get the timeline together with the price before any work starts.
How is the price calculated?
We break the work into concrete deliverables and quote a fixed price for them. If the scope changes along the way, we agree on the change and its cost before doing it.
Who owns the code?
You do. The source code, repositories and accounts are yours, and we hand over everything needed to run the product without us.
Can you take over an existing project?
Yes. We start with a short audit of the code, infrastructure and open issues, then propose a plan: what to fix first, what to keep, and what ongoing maintenance will cost.
What happens after launch?
We can monitor the app, analyse errors and handle updates and small fixes on an ongoing basis — or hand everything over to your team with documentation.
Do you work with clients outside Estonia?
Yes. We work remotely and asynchronously, in English, Estonian or Russian.
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Get in touch
Tell us what you need built, tested or fixed. Small scopes welcome, async communication, a reply within one business day.
Start a conversation06
The company
Opentech OÜ has been registered in Estonia since 2018. We own what we build and run it ourselves.