JOIN

Backend engineer in hiring platforms

In short

Senior Backend Engineer role at JOIN, a hiring-platform company, joining an established engineering hub in Barcelona (hybrid). The team builds scalable platform features used by tens of thousands of users, working closely with frontend, product, and DevOps/platform teams. Requires 5+ years of backend development, 2+ years with a strongly typed language or TypeScript, strong RDBMS experience, solid testing background, and experience with message brokers.

About
JOIN helps thousands of businesses find the right people — faster, fairer, and with less friction. Our platform handles millions of candidate interactions, and our clients praise JOIN's attention to detail and unmatched user experience. We're looking for a Backend Engineer to join our established engineering hub in Spain. You'll be stepping into a mature, integrated team and helping push it forward: improving our platform architecture, raising our quality bar, and building robust, scalable features that tens of thousands of users rely on every day.
Responsibilities
•Collaborate with frontend engineers, product managers, and DevOps/platform teams to build meaningful features through our Agile SDLC/Kanban workflow.
•Conduct peer code reviews and contribute to retrospectives to drive continuous improvement.
•Define technical requirements and identify the best solutions to meet team goals.
•Participate in engineering retrospectives focused on testing, architecture, automation, and coding standards.
•Always think beyond the code - you'll focus on delivering value and improving the user experience for our customers.
Requirements
•5+ years of backend development experience.
•2+ years of experience with a strongly typed language or TypeScript.
•Strong experience with RDBMS (raw queries or via ORM).
•Solid background in unit and integration testing.
•Experience with message brokers (SNS, RabbitMQ, Kafka, Google Pub/Sub, etc.).
Nice to have: Experience with Node.js, GraphQL, GCP or AWS, gRPC and protobufs; Strong grasp of SOLID principles.
Conditions
•We love collaborating in the office sharing knowledge with all colleagues, and we do understand the flexibility of working from home when needed.
•We adapt quickly and embrace change in a growth-oriented startup environment.
•We continuously challenge ourselves and each other to improve.
•Apple hardware – the best tools for the job (MacBook).
•Team events – brunches, sports activities, and quarterly gatherings in Berlin.
•Productivity from Everywhere – 104 days per year remote (post-probation), following our hybrid policy.
•Competitive salary – tailored to align with your experience level.
•Relocation support – assistance with paperwork, travel, and one month of furnished accommodation.

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