Principal Software Engineer

Location
Warsaw / Berlin
Arrangement
Full-time / Hybrid
Tags:
Developer
Listed on
January 22, 2025

PRINCIPAL SOFTWARE ENGINEER (Go/React/Node), dApp

Full-time, Hybrid, Warsaw & Berlin

OUR MISSION

Lead the movement of data computing automation to the edge, to real-time, with data sovereignty.

As AI evolves with agentic workflows, CEF transforms how intelligence and data interact through a fundamentally new approach: dynamic orchestration of AI agents securely onto your data.

CEF is not just another AI cloud service - we're building the foundation for the next generation of AI infrastructure.

ABOUT THE ROLE

As a Principal Software Engineer, you will take ownership of building and evolving our core products from the ground up. You’ll be responsible for quickly creating full-cycle prototypes, turning ideas into robust, production-ready solutions. Your work will involve designing and developing cutting-edge, high-performance blockchain and enterprise applications using a modern tech stack.

Key Responsibilities
  • Develop back-end solutions using Go, and front-end ones using React, Node.js (NestJS), and other modern technologies.
  • Build and refine prototypes to produce high-quality products.
  • Take ownership of the architecture, design, and implementation of complex systems.
  • Contribute to SDKs, CLI tools, and other developer-facing products.
  • Integrate Web3 principles, including wallets, smart contracts, and decentralized protocols.
  • Lead projects, ensuring quality and timely delivery, while mentoring junior developers.
Qualifications
  • 7+ years of software development experience.
  • 3+ years in front-end development using React, TypeScript, and JavaScript (ES6+).
  • Strong experience in Go, Node.js, GraphQL, and other backend technologies.
  • Advanced understanding of data structures and algorithms.
  • Experience in Test-Driven Development (TDD) and maintaining high code quality standards.
  • Familiarity with Web3 technologies, decentralized systems, and smart contracts
Nice to Have
  • Experience with distributed or decentralised architecture.
  • Experience with multi-chain wallet development, EVM, and Substrate.
  • Background in AI/ML or blockchain-related projects.
  • Leadership skills and experience in guiding development teams.
ABOUT US

CEF is a cutting-edge startup operating in stealth mode, poised for impact in the AI landscape with recent seed funding. Our vision is bold: to create a future where individuals own their data and trusted personal AI agents seamlessly enhance everyday life with real-time, secure, and transparent intelligence.

We are building an AI-first data computing platform combining automated edge infrastructure, real-time agent orchestration, and permissioned dynamic AI data pipelines. 

BENEFITS
  • Base Pay: We offer a market-competitive base salary based on your experience and expertise, plus a major upside in equity.
  • Customized Benefits: We are flexible in our offers and open to personalization, feel free to ask.

This is your chance to join a trailblazing team at the ground level. We’re assembling innovative minds to tackle complex challenges and shape the foundational technologies for tomorrow’s world.

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Principal Software Engineer

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