Senior Full-Stack Developer

About the Position

We are seeking a Senior Full-Stack Developer to join our innovative fintech team at Fuelfinance. This role is remote and based in Ukraine. You will be instrumental in building AI-powered finance agents that automate financial workflows for startups and SMBs.

About the Company

Fuelfinance is on a mission to revolutionize financial management for early-stage startups. We recently raised $1M in Seed Funding from top-tier investors and are trusted by businesses with over $200M in P&L. Our goal is to prevent startup failures due to cash flow issues and unlock trillions in GDP growth.

Responsibilities

• Design, build, and own features end-to-end across the stack - from architecture decisions to production monitoring.
• Build with AI as your default workflow: agentic coding tools with proper codebase context and end-to-end test verification.
• Develop agentic AI workflows: LLM-powered features with proper context management, tool use, and automated end-to-end testing.
• Make pragmatic technology choices and defend them - weighing cost, speed, and long-term maintainability.
• Identify problems and propose solutions before they're assigned to you.
• Keep security and data integrity at the core of everything.
• Estimate, communicate risks early, and ship fast without cutting corners that matter.

Requirements

• 6+ years of software engineering experience with real depth.
• Proficiency with AI-assisted development (a must) - not just chat-based usage: you know how to build agentic coding workflows, feed the right codebase context to models, and verify AI output with end-to-end testing.
• Proficiency in both frontend and backend development.
• TypeScript, Node.js (Nest.js), React.
• SQL, MongoDB.
• AWS knowledge.
• B2/C1 English level.
• Experience enhancing system and infrastructure security.
• Proactive approach.
• Comfortable with startup mode: shifting priorities, fast pace, high ownership.

Nice to Have

• Experience with LLM APIs in production (Anthropic, OpenAI), RAG.
• Fintech background or experience on security-focused projects.
• Knowledge of one of the following: C#, Java, Go, Python.
• Early-stage startup experience.
• Experience with infrastructure setup.

We Offer

• Build the future of finance work - design AI-native finance products, not just maintain them.
• Rapid skills improvement.
• Growth opportunities according to our seniority grading (it comes with a compensation increase).
• Flexible schedule and time-off policy.
• 18 days of paid vacation per year, paid sick leaves.

Recruitment Process

• Soft skills interview with the recruiter.
• System Design & Experience Review with the Head of Engineering.
• Culture fit interview with the VP of Operations.
• Final Interview with the CEO.

Why Work with Us?

Join us and be part of a team that is safeguarding the future of thousands of startups. At Fuelfinance, we're not just creating software - we're making a real impact.

Ready to apply? Click here to apply.