Senior Ruby Backend Engineer with affinity for observability (d/w/m)

<p>Hypofriend has helped thousands of customers navigate the difficult journey of buying a home. Our online platform helps customers from calculating their affordability to getting matched to relevant properties to calculating and processing the optimal mortgage.</p> <p>As a Senior Backend Engineer with an affinity for observability, you would be supporting both a customer-facing and an advisor-facing product that run on Vue.js, GraphQL, and Ruby on Rails, powered by AWS. Our customer-facing products include complex calculators wrapped in a simple UI, with a powerful calculation engine that takes thousands of mortgage products and optimizes them for our customers.</p> <p>Our advisor-facing products include a fully-fledged back-office that ensures customer interactions over email, chat, and telephone — as well as the processing and handling of mortgage applications and financial documents — are reliable, efficient, and secure.</p> <p>You'll help ensure our calculation engines, back-office tools, and customer-facing platform become more resilient and secure as we grow.</p> <h2>Tasks</h2> <p>💪🏽 Individuals who like getting things done</p> <p>💬 Excellent communication skills, able to work closely with backend engineers and product teams</p> <p>🔍 Eagerness to understand the systems end-to-end, from application code to the infrastructure it runs on</p> <p>🔧 Someone who is as comfortable writing infrastructure-as-code as they are debugging a production incident</p> <p>📈 A pragmatic approach to reliability — building the right amount of resilience, focussing on the key building blocks and clean architecture</p> <p><strong>Our technology stack</strong></p> <p>⚙️ <strong>Backend</strong></p> <ul> <li>Ruby 4.0 (Rails 8.1)</li> <li>PostgreSQL 16</li> <li>Serverless Ruby, Node.JS, Python</li> </ul> <p>🖌️ <strong>Frontend</strong></p> <ul> <li>Vue.js 3</li> <li>CSS3 (flex &#x26; friends)</li> </ul> <p>👷🏽 <strong>Infrastructure</strong></p> <ul> <li>AWS: ECS, Lambda, RDS, CloudFront</li> <li>Terraform for infrastructure-as-code</li> <li>CI/CD pipelines</li> </ul> <p>🔍 <strong>Testing &#x26; Reliability</strong></p> <ul> <li>RSpec</li> <li>Monitoring &#x26; alerting tooling</li> </ul> <h2>Requirements</h2> <ul> <li>Strong commercial experience with <strong>Ruby</strong> (min 4-5 years), ideally including <strong>Ruby on Rails 7/8</strong></li> <li><strong>RSpec</strong> experience</li> <li>Good grasp of <strong>OO patterns</strong></li> <li><strong>Sentry</strong>, <strong>GitHub</strong> and <strong>Datadog</strong> are your best friends</li> <li>Hands-on production experience with <strong>Terraform</strong> for infrastructure-as-code</li> <li>Working knowledge of <strong>AWS</strong> (ECS, Lambda, RDS, CloudFront, VPC networking, IAM)</li> <li>Experience building and maintaining <strong>CI/CD pipelines</strong></li> <li>Solid understanding of <strong>observability</strong>: monitoring, logging, and alerting</li> <li>Experience with <strong>containerization</strong> (Docker, ECS or Kubernetes)</li> <li>Comfort with <strong>incident response</strong>: on-call rotations, postmortems, and root-cause analysis</li> <li>Good grasp of <strong>RDBMS</strong> operations (<strong>PostgreSQL 16+</strong>) — backups, performance tuning, failover</li> <li>A security-first mindset: familiarity with secrets management, least-privilege access, and cloud security best practices</li> </ul> <p><strong>Nice to have</strong></p> <ul> <li>Experience with <strong>serverless Ruby, Node.JS</strong> architectures</li> <li>Familiarity with <strong>GitHub Actions</strong></li> <li>Experience defining and tracking <strong>SLIs/SLOs/error budgets</strong></li> <li>Scripting/automation experience beyond Ruby (Bash, Python)</li> <li>Prior experience in a regulated industry (fintech, proptech, or similar)</li> </ul> <h2>Benefits</h2> <p><strong>What can Hypofriend offer you?</strong></p> <p>👪 A young, motivated, and interdisciplinary team with years of experience building successful digital products</p> <p>🏠 Work up to 100% from home, with occasional meetings and off-sites near our Berlin Headquarters</p> <p>💥 In addition to an attractive fixed salary, you get the exciting opportunity to improve the German mortgage industry and be at the forefront of new and innovative practices</p> <p>📈 Stock options in a growing company</p> <p>💰 An 1,500 annual euro Learning budget</p> <p>💼 As a young and rapidly growing company you have an excellent career perspective</p> <p>💻 Latest Macbook and equipment to work from home</p> <p>🏃🏼‍♂️ Urban Sports Membership</p> <p>📍 A unique 3-story office at Rosenthaler Platz</p> <p>🏡 Full support to become a homeowner</p> <p>Find <a href="https://www.arbeitnow.com">Jobs in Germany</a> on Arbeitnow</a>