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

Das ist der Job

Hypofriend has helped thousands of customers navigate the difficult journey of buying a home.

Darum lohnt es sich

Tasks • Individuals who like getting things done • Excellent communication skills, able to work closely with backend engineers and product teams • Eagerness to understand the systems end-to-end, from application code to the infrastructure it runs on • Someone who is as comfortable writing infrastructure-as-code as they are debugging a production incident • A pragmatic approach to reliability — building the right amount of resilience, focusing on the key building blocks and clean architecture Our technology stack Backend • Ruby 4.0 (Rails 8.1) • PostgreSQL 16 • Serverless Ruby, Node.JS, Python Frontend • Vue.js 3 • CSS3 (flex & friends) Infrastructure • AWS: ECS, Lambda, RDS, CloudFront • Terraform for infrastructure-as-code • CI/CD pipelines Testing & Reliability • RSpec • Monitoring & alerting tooling Requirements • Strong commercial experience with Ruby (min 4-5 years), ideally including Ruby on Rails 7/8 • RSpec experience • Good grasp of OO patterns • Sentry, GitHub and Datadog are your best friends • Hands-on production experience with Terraform for infrastructure-as-code • Working knowledge of AWS (ECS, Lambda, RDS, CloudFront, VPC networking, IAM) • Experience building and maintaining CI/CD pipelines • Solid understanding of observability: monitoring, logging, and alerting • Experience with containerization (Docker, ECS or Kubernetes) • Comfort with incident response: on-call rotations, postmortems, and root‑cause analysis • Good grasp of RDBMS operations (PostgreSQL 16+) — backups, performance tuning, failover • A security‑first mindset: familiarity with secrets management, least‑privilege access, and cloud security best practices Nice to have • Experience with serverless Ruby, Node.JS architectures • Familiarity with GitHub Actions • Experience defining and tracking SLIs/SLOs/error budgets • Scripting/automation experience beyond Ruby (Bash, Python) • Prior experience in a regulated industry (fintech, proptech, or similar) Benefits What can Hypofriend offer you? • A young, motivated, and interdisciplinary team with years of experience building successful digital products • Work up to 100% from home, with occasional meetings and off-sites near our Berlin Headquarters • 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 • Stock options in a growing company • An 1,500 annual euro Learning budget • As a young and rapidly growing company you have an excellent career perspective • Latest Macbook and equipment to work from home • Urban Sports Membership • A unique 3-story office at Rosenthaler Platz • Full support to become a homeowner Our online platform helps customers from calculating their affordability to getting matched to relevant properties to calculating and processing the optimal mortgage.

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.

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.

You’ll help ensure our calculation engines, back-office tools, and customer-facing platform become more resilient and secure as we grow.