Backend Engineer at Wallapop

✨ The Stack take on this Wallapop job

• 🏢 Wallapop has 12 jobs here, 7 with visa sponsorship see all
• 🛂 Visa: Highly Qualified Professional permit. Education: Higher education degree guide
• 💡 No salary shown. Ask Wallapop if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Wallapop is a Barcelona based scale-up driven by the purpose to empower people to embrace a more conscious and human way of consumption. We believe in a world where collaborative economy is mainstream. This is what drives us. 💫 Wallapop operates in Spain, Italy and Portugal, offering a catalogue of several hundreds of millions of products and services. Powered by technical innovation and continuous improvement, we bring together the scale & trust of classifieds with the marketplace’s convenience & reach. 🌱 Our mission is to enable a connected trade ecosystem, making 2nd-hand the norm through smart use of technology.   The Challenge 🧩  Some of the interesting things we are currently doing include finding new ways to handle complexity and improve resiliency. We leverage various AWS technologies (compute, storage, etc.) to meet our objectives. At Wallapop, as a Backend Engineer, you'll have ownership of team microservices, fully embracing the DevOps philosophy. Our tech stack includes the following: * Kotlin & Java * Spring Boot & Ktor * Kafka & RabbitMQ * MySql, DynamoDB, Redis & RedShift * Docker * Solr & ElasticSearch * AWS: S3, ECS, RDS, Lambdas, CloudWatch, MSK, SES, CloudFront & more   What You Will Do 👇 * Write and maintain robust, scalable code in Java or Kotlin, depending on your team's specific stack. * Develop new features using Domain-Driven Design (applying both tactical and strategic design principles). * Modernize and refactor legacy components to ensure long-term system health. * Champion software quality by implementing comprehensive testing strategies, contributing to a collaborative and reliable code review culture.   What We’re Looking For 🔎 * Demonstrated problem-solving skills and the ability to think critically about complex technical challenges. * A quality-driven mindset with a pragmatic focus on detail and delivering value. * Adaptability and a genuine eagerness to learn, share knowledge, and grow within a dynamic team.   Do note that all our jobs are 📍 Barcelona based. We follow a hybrid model where flexibility rules. We commit to a minimum of 6 days per month in the office. Each team self-organizes to decide on cadence and in-person/remote rituals. Wallapop is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees as we want Wallapop to be a place for everyone. Additionally to the opportunity to contribute to an agile product set up and work together towards achieving our meaningful mission, we offer the following 🍭 Perks & Benefits: * Generous individual learning budget of 2k per year * Free office meals, lunch selection from different providers * Group and individual English, Catalan & Spanish lessons as part of our working day * Private Health Insurance with Alan * Flexible working hours + Intensive Fridays * Flexible remuneration to deduct from gross salary (kindergarten/food/transport check) * Gym & Wellness plan, including physiotherapist in the office * Generous referral Program & Charity Donation * Bonus for weddings & newborns * Wallapop Renta (Tax income support) * Monthly plan for free shipping, bumps & home-pick-up on our services * Work anniversary Gifts and Birthday Surprises * Contribution towards your WIFI in your monthly payroll * One-off payment based on compensation package to go towards setting up your home office * Relocation package (monetary support and legal advice) and visa sponsorship, if applicable * 26 holidays per year * TOP hardware of your choice (latest Apple or Windows)   What does the hiring process for this position look like? **Please, note that all interviews take place remotely over hangouts.** * Intro Call - run by Talent Acquisition, focus on providing more information about the role and the company as well as going over your experience, motivation, and expectations. This usually takes 45-60 minutes. * Technical Task - you will be assigned a test that consists of a coding challenge to assess the technical skills required for the role. You will have up to 7 days to complete it * Expertise Interview - run by the core team, focusing on the hard skills and the ability to deliver in a given context. This usually takes 60-90 minutes. * Stakeholder Interview - run by the hiring team and relevant stakeholders, focus on the ability to collaborate & deliver in a cross-functional set-up. This usually takes 60 minutes. * Culture-Add Interview - run by culture interviewers, focus on adherence to Wallapop's purpose and business proposition. This usually takes 60 minutes. * Offer - should you be the right candidate, your offer will be discussed over a call with talent acquisition and will then be confirmed in writing.

Responsibilities

As a Backend Engineer, you will write and maintain robust, scalable code in Java or Kotlin and develop new features using Domain-Driven Design. You will also modernize and refactor legacy components to ensure long-term system health.

Requirements

The ideal candidate should demonstrate problem-solving skills and have a quality-driven mindset with attention to detail. Adaptability and eagerness to learn and grow within a dynamic team are also essential.

Key skills

• Kotlin — in 251 other listings on The Stack
• Java — in 360 other listings on The Stack
• Spring Boot — in 147 other listings on The Stack
• Ktor — in 2 other listings on The Stack
• Kafka — in 173 other listings on The Stack
• RabbitMQ — in 71 other listings on The Stack
• MySql — in 93 other listings on The Stack
• DynamoDB — in 11 other listings on The Stack
• Redis
• RedShift
• Docker
• Solr
• ElasticSearch
• AWS
• DevOps
• Domain-Driven Design

On The Stack (as of 2026-11-05)

• Wallapop has 11 other listings on The Stack, 7 of them marked as offering visa sponsorship.
• 76 visa-sponsored jobs in Spain on The Stack, posted in the last 60 days.
• 68 visa-sponsored backend engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Wallapop

Is this Backend Engineer role still open?

It was posted on 2026-03-24. Listings more than 30 days old may no longer be active, so check Wallapop's site before applying.

Where is this role located?

The listing gives the location as Barcelona, Spain. It is marked remote.

What skills does this role ask for?

The listing names: Kotlin, Java, Spring Boot, Ktor, Kafka, RabbitMQ, MySql, DynamoDB, Redis, RedShift, Docker, Solr, ElasticSearch, AWS, DevOps, Domain-Driven Design.