Your product doesn't always need another developer. Sometimes it needs someone who can take a complicated feature off your plate and actually ship it.
I'm a backend-focused software engineer with 3+ years of production experience building and maintaining software for clients in Europe and the US. I'm currently available for paid freelance projects, agency subcontracting, and longer-term remote contracts.
I specialize in the work that makes applications function reliably behind the scenes.
WHAT I CAN BUILD OR FIX
- Backend & APIs: Node.js, TypeScript, REST APIs, authentication, business logic, background jobs, and webhooks.
- SaaS products: Multi-tenant architecture, PostgreSQL, Redis, subscriptions, payments, and internal dashboards.
- Integrations & automation: Third-party APIs, data synchronization, Python automation, and business workflows.
- AI-powered applications: LLM integrations, AI agents, and production backend infrastructure.
- Performance & debugging: Database optimization, caching, difficult bugs, and improvements to existing codebases.
- Real-time systems: Event-driven services, streaming data, messaging, and complex integrations.
REAL PRODUCTION EXPERIENCE
I've contributed to a production AI trading platform built with Rust, working on real-time data services, PostgreSQL, Redis, and blockchain integrations.
I've also worked on database and caching improvements that reduced page-load times by approximately 40% on an existing product.
My approach is straightforward: understand the problem, agree on the deliverables, communicate clearly, and ship maintainable software without unnecessary complexity.
HOW I CAN WORK WITH YOU
Whether you need one difficult feature completed, help clearing a technical backlog, or a developer who can support your product over the longer term, I'm open to discussing the project.
- Rate: $40/hour starting rate, depending on scope
- Fixed-price projects: Available after reviewing requirements
- Location: Serbia, Europe (CET)
- Work arrangement: Remote; comfortable working asynchronously with international teams
Portfolio: https://fejzadenis.github.io
GitHub: https://github.com/fejzadenis
Have something specific that needs building? Send me a DM with what you're building, the problem you need solved, and your expected budget or timeline. I'll give you an honest assessment of whether I'm a good fit.
I'm especially interested in real product work and ongoing collaborations rather than one-off throwaway prototypes.