Founding Engineer @

6 days ago

Tel Aviv, Tel Aviv, Israel Rainbow 🌈 Full time ₪200,000 - ₪250,000 per year

About Us The pain is universal: finance teams stitch together spreadsheets and dashboards just to answer basic questions about their cash flow. They feel constantly behind, reactive instead of in control. By the time their systems tell them what happened, it's too late to optimize.

This is bad for operators managing treasury today, directly hits the bottom line—costs companies millions in lost yield and higher borrowing costs. But it's wide open for AI-native contenders.

Rainbow is building an AI-powered treasury system of action for global companies that turns forecasts into execution with the intelligence and reliability that modern finance demands. We're backed by Bessemer Venture Partners, Vertex Ventures, Hanaco Ventures, and leading angels in fintech. We work with companies from private mid-market to public enterprises.

The Inevitable Future:
Every company becomes financially intelligent.
We're building the foundations for that transformation now.

The Role Join Rainbow as a founding engineer who works both with customers and on the product. You'll alternate between being embedded with customer teams to understand their needs and working with our core engineering team to advance the platform.

What You'll Do:

  • Design and build AI-powered treasury automation systems from scratch
  • Work directly with enterprise customers to understand their workflows and implement solutions
  • Develop APIs, data pipelines, and AI models that handle critical financial operations
  • Lead technical decisions across our full stack (backend, AI/ML, data infrastructure)
  • Take ownership of complex projects from concept to production deployment

We Need Someone Who:

  • Has a strong record of end-to-end product development and builder's hunger
  • Is comfortable with modern development practices (Python, cloud infrastructure, APIs)
  • Has experience with AI/ML systems, LLMs, or automation workflows
  • Can work directly with customers in enterprise environments
  • Takes high ownership and can push through complex technical challenges

Bonus: Experience building AI agents in production

This isn't just writing code—it's living in the problem space, serving customers directly, and using those insights to build a better product.

  • AI Founding Product Lead

    6 days ago

    Tel Aviv, Tel Aviv, Israel Sap Full time ₪90,000 - ₪120,000 per year

    Founding Product Lead – AI / InsurTechWe're looking for aFounding Product Leadto join us at the ground floor and play a key role in shaping the future of ourAI-driven InsurTech startup.This is a high-impact, hands-on role for someone who thrives in early-stage environments and is passionate about building innovative products powered byGenerative AI.What...

  • Machine Learning Engineer

    2 days ago

    Tel Aviv, Tel Aviv, Israel BTC searching Full time ₪90,000 - ₪120,000 per year

    ML/Data Engineer – Founding Team (First Hire) - FOUNDING TEAMOne of our clients, an early-stage fintech startup, is developing an innovative AI-drivenConsistency Monitoringplatform for financial institutions such as banks and insurance companies. Their mission is to ensure thestability and reliabilityof critical business applications that rely on AI/ML,...

  • Senior Software Engineer

    2 weeks ago

    Tel Aviv, Tel Aviv, Israel Rainbow 🌈 Full time ₪120,000 - ₪240,000 per year

    About the RoleWe are looking for a Senior AI Software Developer to join as a founding team engineer in our AI-first R&D company. This is a unique opportunity to shape the technical foundation, architecture, and culture of a company built around AI. You will work in a value creation fintech company, collaborating closely with customers to design and deliver...

  • Data Engineer

    2 weeks ago

    Tel Aviv, Tel Aviv, Israel PEAK- HR AS A SERVICE Full time ₪104,000 - ₪130,878 per year

    We're Hiring: Data Platform Software Engineer | Big Data • Streaming • Cloud • ML PipelinesPEAK HR is a tech recruitment company, specializing in connecting top-tier talent with the most innovative startups and leading high-tech companies in the market >>>>>>A fast-growing SaaS startup founded by serial entrepreneurs is building a cutting-edge platform...

  • Full Stack Engineer

    2 days ago

    Tel Aviv, Tel Aviv, Israel BTC searching Full time ₪120,000 - ₪180,000 per year

    One of our clients, an early-stage fintech startup, is looking to hire aFull-Stack Engineer (Backend Focus)to join their founding team as thefirst engineering hire. This company is developing an innovative solution in the AI/ML infrastructure space, helping financial institutions ensure consistency across their mission-critical systems — from fraud...

  • Cyber Stealth Startup- Senior Data Engineer

    4 days ago

    Tel Aviv, Tel Aviv, Israel Team8 Full time ₪90,000 - ₪120,000 per year

    DESCRIPTION Join a stealth-mode AI security startup backed by Team8, where you'll be part of the founding engineering team solving cutting-edge challenges at scale.Work in a fast-paced, dynamic environment, designing and implementing innovative solutions that blend AI, security, and high-performance distributed systems.Collaborate with a tight-knit,...

  • R&D Medical Device System Engineer

    2 weeks ago

    Tel Aviv, Tel Aviv, Israel Ethosia Full time ₪90,000 - ₪120,000 per year

    Roles and responsibilities• Overall responsibility for system validation and verification procedures and NPI process.• Define and conduct the system V&V procedures, including documentation (protocol & report).• Support the regulatory validation processes.• Define create, and run the required testing tools for the R&D and production line and conduct...

  • Cyber Stealth Startup- Senior Data Engineer

    2 days ago

    Tel Aviv, Tel Aviv, Israel Team8 Full time ₪120,000 - ₪180,000 per year

    DESCRIPTIONJoin a stealth-mode AI security startup backed by Team8, where you'll be part of the founding engineering team solving cutting-edge challenges at scale.Work in a fast-paced, dynamic environment, designing and implementing innovative solutions that blend AI, security, and high-performance distributed systems.Collaborate with a tight-knit,...

  • Frontend / Fullstack Software Engineer

    2 days ago

    Tel Aviv, Tel Aviv, Israel Reindeer AI Full time ₪90,000 - ₪120,000 per year

    We are a well-funded, early-stage startup seeking a Frontend / Fullstack Software Engineer to join our founding team. In this role, you will help build cutting-edge web applications and platforms that bring autonomous AI agents to life, automating complex enterprise workflows. You will play a critical role in shaping intuitive, responsive UIs and robust...

  • Algorithm Engineer

    6 days ago

    Tel Aviv, Tel Aviv, Israel In-House Health Full time ₪100,000 - ₪150,000 per year

    About In-House HealthIn House Health is a seed stage startup that aims to help the global healthcare crisis marked by severe staffing shortages and rising nurses burnout. In-House Health develops a cutting-edge platform that empowers nursing teams to self-manage with unprecedented flexibility. Our innovative solution leverages a predictive AI algorithm to...