Koyfin
Koyfin is a fast-growing fintech product company building a powerful and user-friendly analytics platform used by hundreds of thousands of investors worldwide. We’re looking for a Senior Backend Software Engineer to join our experienced product team and help scale our platform to millions of users.
We believe every investor deserves world-class tools without the complexity or price tag of legacy platforms. That’s why we’ve built a sleek, customizable experience with robust data coverage and stunning visualizations to help users make smarter investment decisions.
Our impact so far:
- 🥇 One of the fastest-growing platforms for financial advisors, driven by product-led growth
- 🚀 Recognized by G2 as a top-rated analytics solution
- 📈 Consistent record-breaking growth in usage and revenue
- 💰 Cash flow positive — and proud of it
If you’re passionate about building great products and want to be part of a collaborative, ambitious team shaping the future of investment research, we’d love to meet you.
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· 125 views · 34 applications · 21d
Senior Software Engineer (Node.js)
Full Remote · Countries of Europe or Ukraine · Product · 5 years of experience · Upper-IntermediateWho we’re looking for? 7+ years of experience in software engineering Strong backend skills: Node.js, NestJS (or similar), SQL, NoSQL Knowledge of design patterns, algorithms, and system architecture Excellent communication skills; collaborative, curious,...Who we’re looking for?
- 7+ years of experience in software engineering
- Strong backend skills: Node.js, NestJS (or similar), SQL, NoSQL
- Knowledge of design patterns, algorithms, and system architecture
- Excellent communication skills; collaborative, curious, and thoughtful
- Advanced English
Will be a plus - Experience working in a fintech product company
- Experience with cloud infrastructure (AWS), CI/CD, and Kubernetes
What you’ll be doing?
You’ll join the Application team and contribute to delivering a best-in-class investment experience for our users. We work with modern technologies like TypeScript, Node.js, NestJS, React, RxJS, AWS, Kubernetes, MongoDB, and PostgreSQL.
You will:
- Lead backend feature development — from concept to release
- Own features end-to-end — from requirements to testing, deployment, and iteration
- Design scalable APIs and services that power our frontend
- Process large, complex datasets
- Identify and resolve performance bottlenecks
- Collaborate closely with product and design teams to deliver features that make an impact
What we offer
- Remote-first work culture with flexible hours
- Competitive salary with bonus potential
- Health insurance or monthly well-being allowance
- Extra vacation days for work-life balance
- Access to a modern coworking space in Kyiv (optional)
- Powerful equipment and everything you need to do your best work
- Direct user impact — your work will reach a global audience quickly
- Strong Team – Collaborate with smart, kind, and experienced teammates
- Fast Feedback Loops – We ship frequently and improve based on real user input
- Ownership & Growth – Contribute ideas, lead initiatives, and grow with the product
- Product-Driven Culture – Transparent, fast-moving, and focused on solving real problems
- Low Bureaucracy – We value autonomy, clarity, and action