The problems your team avoids.
JoyDev is Andrei Ursuleanu's software company in Brașov, Romania: backend and platform engineering, reliability and architecture work, and, from 2019 to 2023, a product of its own. A sole proprietorship from 2011, a company since 2018.
Platform problems that cross boundaries
The work is always the same shape: find what is actually broken, build the fix and the guardrails together, and leave the better path easier than the old one.
Best fit: an engineering leader carrying one expensive problem that crosses systems and keeps coming back.
JoyDev finds the real problem, changes the default, builds the guardrails, and hands the work back safely to the team that keeps it running.
Every engagement follows QSAIL, the method Andrei formalised from two decades of this work: question the premise, scope the whole system, architect the fix with its guardrails, implant it in the team, lift the better path into the default. How QSAIL works →
Platform cost
Spend hidden in default behavior. JoyDev traces where the cost actually sits and redesigns the default so the lower-cost path runs without constant review.
Reliability and self-healing
Heavy on-call, recurring incidents, manual recovery. JoyDev builds self-healing automation and monitoring standards so the platform recovers without human intervention.
Architecture change under constraints
Migrations, restructures, and modernization work where the business cannot stop and the old system still has to carry the load. JoyDev changes the architecture inside real constraints instead of pretending a clean rewrite is available.
Performance under growth
Critical paths that degrade as data and traffic grow. JoyDev profiles the bottleneck, redesigns the path, and builds the discipline so performance holds without constant firefighting.
Delivery friction and release architecture
Teams waiting on each other, builds that rebuild too much, release models that do not match the business. JoyDev redesigns the flow so teams ship with less coordination overhead and less wasted time.
Operational visibility
Money leaking, costs hidden, incidents repeating, but nobody can see where the chain breaks. JoyDev maps the full path and builds the layer that makes the problem measurable for the first time.
Engagements
Three engagements, each a problem that crossed systems and teams.
Parfumdreams, Douglas Group 2023
The modernisation of a multi-country e-commerce operation, storefront through warehouse, stock and courier systems, onto .NET Core microservices on Kubernetes.
E-scooter rental platform for a local investor 2018
End-to-end system design, from the code to the hardware selection and its custom integration, with the vendor negotiations: real-time GPS and geofencing, rider apps for iOS and Android, payments and ride billing, a fleet dashboard.
Prize-flow audit for a gaming operator 2017
A Romanian land-based operator with thousands of locations knew it was losing money, not how much or where. JoyDev's observability and audit tooling made ~€20,000 a day (~€7M a year) of untracked prize-flow losses visible; the fix followed from those findings, and the platform runs without JoyDev.
A product of its own: Carmira
Carmira 2019 - 2023
Automotive marketplace and dealer operations platform. Built from scratch. Andrei called around 200 dealers. Most said no. He learned why. He rebuilt. 20 signed.
Then came everything engineers do not usually touch: marketing, contracts, support tickets, partnership negotiations, payment disputes. Rădăcini Group, Romania's second-largest multi-brand dealer network, made a majority-stake investment offer.
For buyers, a catalogue of new cars from Romania's authorised dealers, a dealer map and vehicle-history checks; for dealers, inventory, campaigns, lead-to-sale tracking and financing and insurance workflows. From 2021 the same platform carried Automira, its used-car brand. .NET Core on Azure, designed, built and run by JoyDev from 2019 to 2023; retired in October 2026.
Carmira was self-funded, so JoyDev knows what a technical decision costs outside engineering.
Andrei Ursuleanu
A hands-on senior software engineer who designs, builds and runs backend and shared platform services, owning their reliability, performance and cost. Since 2005 his work has spanned embedded software, Smart TV applications, enterprise .NET systems and high-throughput distributed cloud platforms.
The same person who finds the problem builds the fix. When you have to build it yourself, you do not miss the real problem.
JoyDev is the company behind the product and the engineering work. The full personal background sits on andrei-ursuleanu.com.
Start with the problem
JoyDev is most useful when something is already expensive - or when nobody has checked whether it is yet.
Bring the known problem, or the suspicion that something important is still hidden. The shape of the work becomes obvious after that.
The first useful conversation starts with one problem chain, not a full roadmap: where cost, risk, or delay crosses team boundaries.
Remote, in English, from Brașov, Romania. Stack: C#/.NET and ASP.NET Core; Kubernetes, AWS and Azure; Prometheus, Grafana and OpenTelemetry; SQL, Kafka and Redis; CI/CD.
What problem is your team avoiding?
Known problem or unknown unknown. Start there.