CareerPlan

Senior Backend Developer

PolandRemoteFull-time2026-10-19 → 2026-11-10
HybridContractor via own company (B2B)

Core

Designing and optimizing application architecture, database schemas, and .NET services for a data analytics platform serving institutional ETF participants.

Role type

Senior Backend Software Developer

Builds

Data analytics platform with web application and robust APIs for ETF data, analytics, and custom solutions

Domain

Financial Technology (FinTech) / Exchange Traded Funds (ETFs)

Deliverable

production ML models | product features

Required skills

.NET, C#, API development, database design, SQL, Azure, automated testing, AI-assisted development tools

Preferred skills

Data visualization, B2B SaaS products, financial markets knowledge

Technologies

.NET, C#, Azure, SQL

Responsibilities

Design and optimize application architecture and database schemas; Develop and maintain .NET services, APIs, and data-processing components; Participate in solution design and requirements analysis; Ensure backend performance, scalability, security, and reliability; Review backend code and promote engineering standards; Troubleshoot complex production and system issues; Mentor junior and mid-level backend engineers

Seniority

Senior, hands-on IC with mentorship responsibilities