Backend & platform engineering
Design and development of specialized backends, services and system components tailored to concrete business requirements.
KOSE Software Engineering
Advanced backend engineering for demanding systems.
We design and develop reliable software for fintech, trading, database systems and data-intensive applications.
Experience gained in engineering teams at
Tradewebtrading & fintech
Oracledatabase platforms
Samsung R&Dnetworked software
Infobrightanalytical databases
What we do
Engineering focused on reliability, performance and measurable value.
KOSE helps companies design, build and modernize systems where technical quality directly affects business outcomes.
Databases & data systems
Database solutions, data tooling, integrations and optimization of systems that rely heavily on data.
Performance & scalability
Analysis and optimization of systems requiring low latency, high throughput and predictable behavior.
Architecture & modernization
Support with architecture decisions, modernization of mature systems, code reviews and technical change planning.
Areas of expertise
Hard systems, not a random list of technologies.
We focus on classes of problems where engineering experience, implementation quality and understanding the whole system matter.
Fintech & Tradingtransaction backends and systems with demanding operational requirements
Database Systemsengines, tooling, routing, migrations and data infrastructure
High-Performance Backendperformance-oriented C++, data processing and critical system paths
Data-Intensive Applicationsanalytical systems and applications operating on large data sets
Distributed & Networked Softwarenetwork communication, concurrency and multi-component systems
Developer Tools & Infrastructuretooling that improves reliability and engineering productivity
Technology & approach
Technology is a tool. The outcome is the goal.
Core engineering
C++PythonSQLMySQLPostgreSQLBackend systemsNetworkingPerformance engineering
AI-assisted engineering. We use modern AI tools where they measurably improve analysis, implementation, testing or work with existing code — without outsourcing engineering responsibility to them.
Understand the system
We start with context, constraints, existing architecture and the business problem.
Choose the right solution
We favor pragmatic approaches over technology for technology's sake.
Deliver responsibly
Code quality, maintainability and production stability remain part of the solution.
Contact
Have a demanding technical problem?
Tell us about the project, existing system or problem you need to solve. We will respond if we see a meaningful way KOSE can help.
Location
Warsaw, Poland · remote collaboration