Software Engineer Blockchain

As a Software Engineer Blockchain at Sahar, you join the Engineering team to actively develop an innovative SaaS product for multi-blockchain data analysis. You'll work across back-end, front-end, and infrastructure in a demanding context with direct impact on strategic projects. Collaborating closely with Product, QA, and DevOps teams, you'll balance building innovative features with consolidating the existing codebase.

What you'll do

• Design, develop, and deploy web applications and micro-services by identifying appropriate architectures, working across the full development cycle from technical design to implementation
• Integrate AI tools by using IDE assistants and participating in the design of agentic workflows
• Participate in setting up and optimizing infrastructure (CI, Docker, Kubernetes) alongside the DevOps team, contributing to configuration, deployment, monitoring, and management of development and production environments

What you bring

• Several years of professional experience as a Software Engineer in demanding technical environments
• Mastery of programming fundamentals including good practices, performance, design patterns, data structures, and algorithms
• Proficiency in at least one language beyond Python (TypeScript, Go, Rust, Scala, Java, or similar)
• Front-end skills: JavaScript, browser APIs, and expertise in at least one framework (React, Vue, Svelte, Angular, Solid, or similar)
• Back-end skills: mastery of a proven back-end technology (Django, FastAPI, Fastify, Nest.js, Express, Spring, or similar), comfort with relational databases and REST APIs
• Knowledge of MVC, Clean, and Hexagonal Architecture patterns
• Minimal working knowledge of Docker
• Rigorous versioning practices and continuous deployment with Git
• Active use of an AI assistant in your IDE with genuine hands-on experience, including knowledge of prompt and harness engineering
• Fluent written English (documentation, libraries, and team communication are in English)
• Familiarity with the blockchain and crypto ecosystem (Bitcoin, EVM, Solana)
• Ability to document your work with clarity
• Comfort working with continuous deployment methodologies
• Intellectual curiosity, critical thinking, and passion for ambitious technical challenges

Nice to have

• Significant experience with Kubernetes
• Good understanding of on-chain data models and smart contracts
• Open-source contributions, hackathon participation, or personal side projects demonstrating technical passion

What we offer

• Salary of 60,000 to 75,000 EUR gross annually, positioned within the range based on your experience level
• A demanding and stimulating technical environment with a strong R&D focus
• Significant autonomy and trust from day one, with rapid ownership of technical projects from conception to production
• Access to advanced AI tools integrated into your development practices
• Hybrid remote work policy (2 days per week on-site)
• Continuous learning environment including hackathons, job-specific AI training, and ongoing professional development
• Regular team events celebrating individual and collective successes

About Sahar

Sahar builds an innovative SaaS product for multi-blockchain data analysis with a strong R&D focus. The company is committed to ethical, ecological, and responsible AI through its foundation and concrete initiatives including annual carbon accounting, resource-efficient infrastructure and AI models, sustainable mobility, and responsible procurement.