Full Stack Engineer

0verwatch Overview: 0verwatch is building real-time digital asset monitoring, interdiction, and response infrastructure for Web3. Think of it as the security layer that sits between users and permanent loss, detecting threats, triggering alerts, and coordinating responses. 0verwatch is currently in active development. You will be joining us at the discovery phase, a pivotal time when foundational technical decisions are being made and the people who make them leave a lasting mark on the product.

Role Overview: As a Full Stack Engineer, you will build core systems across our entire stack, including backend services, APIs, data pipelines, and frontends. You will join a small, highly collaborative team where your work is immediately visible, and your technical input directly shapes the direction of the product. This is an early-stage role designed for an engineer who thrives on real ownership and enjoys shipping end-to-end solutions.

Key Responsibilities

• Full-Stack Development: Build and maintain robust backend services that ingest real-time blockchain data streams, process them through detection pipelines, and expose results via clean APIs.
• Frontend Engineering: Develop intuitive user interfaces, including dashboards, alert interfaces, and monitoring tools that surface real-time security insights to end users.
• API Design & Integration: Design and implement high-performance API endpoints consumed by B2B partners, such as wallets and blockchain ecosystems.
• Pipeline Engineering: Work across the core detection pipeline, spanning from rule-based checks to ML-powered anomaly scoring and agentic investigation workflows.
• Infrastructure & DevOps: Contribute to CI/CD pipelines, observability, monitoring, and the foundational operational work required to keep production systems running smoothly.
• Architecture & Strategy: Actively participate in architecture and design discussions to help steer our technical roadmap.

Required Qualifications

• Technical Expertise: Solid full-stack experience (backend-heavy is perfectly fine, but you must be able to ship end-to-end) with proven experience building and consuming APIs used by external developers or third-party businesses.
• Systems & Cloud Knowledge: Comfort handling real-time data (event-driven systems, streaming infrastructure, message queues) and cloud-native environments (AWS preferred) with a deep understanding of how to operate services in production.
• Security & Observability Focus: A security-aware approach to development (authentication, access control, data integrity) combined with experience using monitoring and observability tools to debug production systems under pressure.
• Web3 Familiarity: Familiarity with Web3 infrastructure (on-chain data, RPC nodes, blockchain events) is a significant advantage, but not strictly required.
• Startup Mindset: Experience working in a fast-moving, small-team environment where you don't wait for a complete specification, you ask questions, understand the core problem, and execute.
• Communication Skills: Professional fluency in English (written and verbal) to effectively collaborate with the team and communicate with technical partners.

Why Join Us?

• We value what you can build over years at a desk. If you have 3+ years of experience but have shipped real systems under pressure, that matters more to us than a long resume from a comfortable environment.
• You won't just be maintaining someone else's legacy code. You will be directly architecting the security infrastructure that protects the Web3 ecosystem. 
• We are a remote-first culture. While we are looking for candidates based in Greece (with Athens preferred for occasional co-working), you will enjoy a highly autonomous working environment. 
• We offer a competitive salary package, which includes equity and additional forms of compensation on top of your base salary. 

Inclusion & Equal Opportunity: 0verwatch thrives on diverse perspectives, specifically across race, gender, nationality, neurodivergence, and background, to solve complex data challenges. We commit to a policy of non-discrimination and equal treatment; all qualified applicants receive consideration for employment without regard to any characteristic protected by local and European laws.