Senior Backend Engineer

We are JOIN, a team of 75 team members from diverse backgrounds who share a common mission: to democratise recruiting. JOIN is one of the fastest growing HR tech startups in Europe, with over 100,000 registered companies in 6 countries and more than 100,000 actively published job advertisements!

A core offering of JOIN is the multiposting of job ads, enabled by our partnerships and integrations with hundreds of job platforms in Europe. As a Senior Backend Engineer at JOIN, you play a key role in developing this offering which is critical to JOIN’s success!

A UNIQUE OPPORTUNITY

JOIN is opening a new office in Barcelona, marking an exciting milestone in our journey. This is a unique opportunity to be part of something big from the early stages, shaping the future of hiring.

Our ambition is to change the way Small & Medium-sized Businesses (SMBs) hire on a global scale. We want to level the playing field so SMBs can have the same hiring advantages as big companies. Great companies are built with great people, and there are over 25 million SMBs in Europe alone. * Collaborate with frontend engineers, product managers and DevOps/Platform teams to create meaningful features for our customers through our custom-made work methodology Agile SDLC/Kanban.

• Conduct peer code reviews and attend project retrospectives to discuss and execute improvements as a team.
• Help define the requirements and propose the best way to achieve the team goals.
• Participate in technical retrospectives to discuss testing culture, architectural solutions, automation topics, coding standards, and many more!
• You are not “just” a coder — you are empowered to and always thinking about the product value that you can bring and how to improve the experience of our customers.

YOUR FUTURE TEAM

• Our mission as Backend Guild is to provide JOIN’s customers and their candidates with robust features, stable business flows, security, performance and resiliency. We strongly believe that Backend engineering should be collaborative with Platform, DevOps, Product and Frontend teams.
• We take care of our guild’s tools by using our own architecture based on Clean Architecture, strict linters, code generators, coding conventions, code snippets and service templates to spend less time doing mundane work. We take pride in working through TDD, making sure all our services are covered with tests and that our releases are always reliable and stable. We are JOIN, a team of 75 team members from diverse backgrounds who share a common mission: to democratise recruiting. JOIN is one of the fastest growing HR tech startups in Europe, with over 100,000 registered companies in 6 countries and more than 100,000 actively published job advertisements!

A core offering of JOIN is the multiposting of job ads, enabled by our partnerships and integrations with hundreds of job platforms in Europe. As a Senior Backend Engineer at JOIN, you play a key role in developing this offering which is critical to JOIN’s success!

A UNIQUE OPPORTUNITY

JOIN is opening a new office in Barcelona, marking an exciting milestone in our journey. This is a unique opportunity to be part of something big from the early stages, shaping the future of hiring.

Our ambition is to change the way Small & Medium-sized Businesses (SMBs) hire on a global scale. We want to level the playing field so SMBs can have the same hiring advantages as big companies. Great companies are built with great people, and there are over 25 million SMBs in Europe alone.

Tasks

• Collaborate with frontend engineers, product managers and DevOps/Platform teams to create meaningful features for our customers through our custom-made work methodology Agile SDLC/Kanban.
• Conduct peer code reviews and attend project retrospectives to discuss and execute improvements as a team.
• Help define the requirements and propose the best way to achieve the team goals.
• Participate in technical retrospectives to discuss testing culture, architectural solutions, automation topics, coding standards, and many more!
• You are not “just” a coder — you are empowered to and always thinking about the product value that you can bring and how to improve the experience of our customers.

YOUR FUTURE TEAM

• Our mission as Backend Guild is to provide JOIN’s customers and their candidates with robust features, stable business flows, security, performance and resiliency. We strongly believe that Backend engineering should be collaborative with Platform, DevOps, Product and Frontend teams.
• We take care of our guild’s tools by using our own architecture based on Clean Architecture, strict linters, code generators, coding conventions, code snippets and service templates to spend less time doing mundane work. We take pride in working through TDD, making sure all our services are covered with tests and that our releases are always reliable and stable.

Requirements

• 5+ years of backend development experience in total
• 2+ years of experience in any strongly typed language or TypeScript
• Strong experience with any RDBMS (either raw queries or via ORM)
• Good unit/integration testing experience
• Experience with message brokers (SNS/RabbitMQ/Kafka/Google PubSub/etc…)

Nice to have:

• Experience with Node.js
• Experience with GraphQL
• Experience in GCP or AWS
• Experience with gRPC framework and proto buffers
• Good understanding of SOLID principles

Our engineering culture:

• We work with modern technologies: Node.js, TypeScript, GraphQL, gRPC, Google Pub/Sub, Kubernetes.
• We believe in automation. We automate anything and everything that can improve our productivity and focus.
• We write our tests and we test our own solutions, which helps us learn more and understand our clients better.
• We value transparency, close collaboration, and a slight amount of chaos in our work because it makes us faster and more creative.

Benefits

• Be among the first team members in Barcelona and play a key role in one of Europe’s most rapidly expanding HR-Tech startups
• Join a dynamic team in a flexible tech environment, with a new M3 Pro Macbook Pro.
• Experience an inspiring, diverse, and international work atmosphere.
• Regular company events in Berlin, sponsored by the company.
• Flexibility with our hybrid work approach (3 days in the office / 2 from home).
• Work from Anywhere: After your probationary period, you can work from anywhere in the world for up to 104 days per year.

RECRUITING PROCESS

Our recruiting process is designed to help us learn as much as possible about each candidate, provide candidates with insights into our team, and show them what it’s like to be a team member at JOIN.

1. HR Interview – An initial conversation to understand your background, interests, and fit for the role.
2. Hiring Manager Review – The hiring manager evaluates your profile.
3. Hiring Manager Interview – A focused conversation on expectations and team dynamics.
4. Technical Interview – A role-specific assessment of your skills.
5. Meet the Team (Optional) – An opportunity to connect with potential colleagues.

We believe that uniqueness connects us and helps us succeed both as individuals and as a team. That’s why we not only welcome diversity but celebrate it. We take equality and inclusion seriously and commit to welcoming everyone in our team with openness, acceptance, and respect. At JOIN, we want all team members to feel seen and supported.

We welcome all applications, regardless of age, physical or mental abilities, gender, religion, sexual orientation, or any other diverse background. Need assistance or accommodations, either in the workplace or during the hiring process? Please do not hesitate to let us know!

Don’t meet all the requirements? That’s okay too; we’re open to exceptional profiles and celebrate diversity!! * Be among the first team members in Barcelona and play a key role in one of Europe’s most rapidly expanding HR-Tech startups

• Join a dynamic team in a flexible tech environment, with a new M3 Pro Macbook Pro.
• Experience an inspiring, diverse, and international work atmosphere.
• Regular company events in Berlin, sponsored by the company.
• Flexibility with our hybrid work approach (3 days in the office / 2 from home).
• Work from Anywhere: After your probationary period, you can work from anywhere in the world for up to 104 days per year.