Senior / Staff Software Engineer (Backend)

21bitcoin aims to simplify Bitcoin through investment solutions. Founded in 2021 in Salzburg, the company has grown to a lean team of about 21 people, with recent investment from GVB Raiffeisenbank Bayern Mitte.

Position

Senior / Staff Software Engineer (Backend) – full‑time, remote‑first with optional in‑person hubs in Munich, Salzburg, and Vienna.

Responsibilities

• Rebuild the core backend with TypeScript / Go, ensuring robustness, scalability, and future‑proofing.
• Identify and replace outdated implementations, tools, and processes with high‑performance alternatives.
• Own end‑to‑end delivery: design, implement, test, deploy, and maintain backend systems.
• Drive technical excellence: promote clean, modular code, seamless integrations, and optimal architecture.
• Collaborate with the engineering team to solve complex challenges and continuously raise the bar for quality.

Success Metrics

• Highly scalable, reliable, and maintainable backend systems.
• Faster, more efficient feature delivery by development teams.
• Adoption of clear coding practices and best‑in‑class tools across the engineering group.
• Thriving culture of responsibility, collaboration, and professional standards.

Toolbox

• Languages & Frameworks: TypeScript, Go, NestJS, GraphQL.
• Databases: PostgreSQL, DynamoDB.
• Infrastructure: Serverless (CDK, Terraform), Fargate, Docker.
• Messaging & Streams: Kinesis, Kafka, SNS, SQS, EventBridge.
• Workflow Orchestration: Temporal, Restate, Inngest.

Requirements

• 8+ years of backend development, system architecture, and technical leadership experience.
• Strong experience with TypeScript or Go, and building scalable systems.
• Proficiency with PostgreSQL/DynamoDB and serverless/cloud‑native tooling.
• Excellent problem‑solving skills and a self‑starter mindset.
• Strategic thinker who balances innovation with business impact.
• Passion for maintainable, well‑tested, and high‑quality code.
• Located within ±2 hours of CET or willing to relocate to Munich, Salzburg, or Vienna.

Benefits

• Impact: Shape Bitcoin financial services and lead critical projects.
• Autonomy: Drive impactful solutions in a fast‑paced startup.
• Innovation: Use modern tools and cloud‑native infrastructure.
• Growth: Mentorship and learning opportunities with a skilled team.
• Compensation: Competitive salary (€60,000–120,000 gross p.a.) plus equity.
• Remote first with optional in‑person hubs; flexible hours; relocation assistance.

Interview Process

• Resume review and portfolio.
• Exploratory call.
• Test assignment (1‑week take‑home).
• Engineering deep dive (case study/technical interview).
• Workshop: solve real‑world problems.
• Decision and offer.

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