Software agency · Ukraine-based network

Any software product.
Built when it matters most.

Software Built Under Pressure.
Delivered Without Compromise.

Underfire Labs assembles product squads from a deep network of senior Ukrainian engineers — mobile, frontend, backend, machine learning, AI agents, QA, design and SEO. Tell us the outcome you need; we put together the exact team that ships it.

iOS / Android Web platforms LLM & AI agents ML / Data Cloud & DevOps QA automation
underfire — squad assembly
40+engineers in network
15core team members
60+products shipped
72hfrom brief to kickoff
What we build

If it can be built in software, we can build it

There is no "we don't do that" here. Every direction below is covered by engineers who have shipped it in production — and if a project needs a rare skill, our network reaches further than any single office ever could.

Mobile applications

Native and cross-platform apps: fintech, health, marketplaces, streaming, offline-first field tools.

  • Swift / SwiftUI
  • Kotlin / Compose
  • Flutter
  • React Native

Web & frontend

Dashboards, SaaS platforms, marketing sites and design systems that stay fast under real traffic.

  • React / Next.js
  • TypeScript
  • Vue
  • WebGL

Backend & infrastructure

APIs, event pipelines, payments, multi-tenant architecture, migrations off legacy systems.

  • Node.js
  • Go
  • Python
  • PostgreSQL
  • Kubernetes

Machine learning & data

Recommendations, forecasting, computer vision, document understanding, MLOps and monitoring.

  • PyTorch
  • scikit-learn
  • Airflow
  • Vector DBs

AI agents & LLM products

Autonomous agents, RAG systems, tool-calling workflows and copilots wired into real business processes.

  • Claude / OpenAI APIs
  • MCP
  • LangGraph
  • Evals

QA, design & growth

Product design, manual and automated testing, release pipelines, technical SEO and analytics.

  • Figma
  • Playwright
  • Appium
  • GA4 / GSC
The network

A bench that goes far deeper than our team page

Underfire Labs runs on a vetted network of engineers across Kyiv, Lviv, Dnipro, Odesa and Kharkiv — plus Ukrainian specialists now working from across Europe. Fifteen people form our core team; behind them stand dozens more we have shipped with before.

Any direction, any seniority

Mobile, web, backend, ML, AI agents, QA, design, SEO, DevOps. We staff a role in days, not months, because the people are already known to us.

Built for pressure

Our teams have shipped through blackouts, air raids and impossible deadlines. Resilience is not a slide in our deck — it is how we learned to work.

Senior by default

Every engineer we place has 5+ years of production experience and passes a live technical screen with our CTO before touching your codebase.

Overlap that works

Ukrainian time zone covers a full European day and a solid US-East morning. Daily written updates, demos every Friday, no black boxes.

Your code, your IP

Repos, cloud accounts and infrastructure stay in your name. NDAs, DPAs and clean IP assignment signed before the first commit.

Scale up, scale down

Start with one engineer for discovery, grow to a twelve-person program, shrink to maintenance. Monthly notice, no lock-in contracts.

Our products

Selected work

Platforms, apps and internal tools we designed, built and still maintain. Full write-ups on the products page.

01 / MOBILE

Tempo — habit & recovery app

Cross-platform wellness app with offline sync, HealthKit integration and an on-device coaching model. 180k installs in year one.

02 / AI AGENTS

Relay — support agent platform

LLM agents that resolve tier-1 support tickets end to end, with tool access, guardrails and a human handoff path.

03 / PLATFORM

Ledgerline — fintech back office

Multi-currency ledger, reconciliation engine and admin console processing eight-figure monthly volume.

All products and case studies →

How we work

From first call to production in five moves

01

Brief & scoping call

45 minutes with our CTO, not a salesperson. We map the outcome, constraints, deadline and the riskiest unknown.

02

Squad proposal

Within 72 hours you get named engineers, their profiles, a delivery plan, a fixed rate card and a realistic timeline.

03

Two-week proof sprint

We ship something real and demoable in the first fortnight — architecture spike, working slice or prototype. You judge us on output.

04

Delivery cadence

Weekly releases, CI from day one, QA in the loop, written daily updates and a Friday demo. Your PM or ours.

05

Handover or long-run support

Documentation, runbooks and knowledge transfer — or we stay on as your product team. Both paths are first-class.

Start a project

Tell us what needs shipping

Send a brief — even a rough one. You will get a written response within one business day and a scoping call slot with our CTO.

hello@underfirelabs.tech
Kyiv, Ukraine · working EU & US-East hours

NDA on request Fixed-price or T&M Monthly notice

This is a static site — the button opens your email client with the brief pre-filled. Prefer to write directly? hello@underfirelabs.tech