Senior Full-Stack Engineer

Fiska is transforming how finance teams manage event spend. We're building the first AI-powered platform that automates expense tracking, budget management, and real-time reconciliation for social media and marketing professionals (SMMPs).

Our customers save an average of $250K+ annually and reduce reconciliation time by 78%. We're backed by leading investors and working with global brands to solve billion-dollar problems in event finance.

As a Senior Full-Stack Engineer at Fiska, you'll be at the forefront of building the future of event spend management. You'll work with cutting-edge technologies including React, Type Script, Node.js, and AI/ML integrations to create powerful, intuitive solutions for finance teams.

This role offers the opportunity to make a significant impact on product architecture, technical direction, and team culture. You'll work directly with product and design teams to ship features that delight customers and solve real financial challenges.

• Build Core Platform Features: Architect and develop scalable, high-performance full-stack solutions for complex financial workflows including real-time spend tracking, multi-level budget management, automated reconciliation, and policy enforcement systems
• AI/ML Integration: Collaborate closely with AI engineers to build intelligent agent systems and workflows that automate expense categorization, enforce spending policies, provide predictive analytics, and deliver actionable financial insights
• API Development: Design, build, and maintain robust RESTful APIs and Graph
  
  QL endpoints with comprehensive error handling, rate limiting, and documentation that power seamless experiences across web and mobile applications
• Frontend Excellence: Craft intuitive, accessible, and highly responsive user interfaces using React 18+, Type Script, modern state management solutions, and cutting-edge CSS frameworks that deliver exceptional user experiences across devices
• Performance Optimization: Drive application performance and scalability through strategic code optimization, intelligent caching strategies, query optimization, lazy loading, code splitting, and performance monitoring to ensure sub-second response times
• Testing & Quality: Implement comprehensive testing strategies including unit tests, integration tests, and end-to-end tests using modern frameworks. Champion code quality, maintainability, and best practices through thorough peer reviews and technical documentation
• Security & Compliance: Implement enterprise-grade security best practices including AI governance and output guardrails, end-to-end encryption, secure authentication and authorization (OAuth 2.0, JWT), and ensure compliance with financial industry regulations (PCI DSS, SOC 2, GDPR)
• Technical Leadership: Provide mentorship to junior engineers, lead architectural discussions and design reviews, establish coding standards, and actively shape engineering culture, processes, and team growth
• Cross-functional Collaboration: Partner effectively with product managers, designers, AI engineers, and stakeholders to define technical requirements, estimate project scope, prioritize features, and deliver high-quality solutions on schedule
• Innovation & Technical Excellence: Research and evaluate emerging technologies, frameworks, and tools. Advocate for technical improvements, modernization initiatives, and development process enhancements that increase team velocity and product quality

• 5+ years of professional software development experience with demonstrable track record of shipping production applications and features at scale
• Proven experience designing and building production-grade RESTful APIs and Graph
  
  QL services using Node.js, Express, Fastify, or NestJS with focus on scalability and maintainability
• Strong expertise in both relational databases (Postgre
  
  SQL, MySQL) and No
  
  SQL databases (Mongo
  
  DB) including complex query optimization, indexing strategies, schema design, and data modeling
• Hands‑on production experience with cloud platforms (AWS, GCP, or Azure) including serverless architectures, container orchestration, infrastructure as code, and…