Senior JavaScript Software Engineer (Barcelona - Hybrid) at WIZELINE (Barcelona, Spain)
WIZELINE· Barcelona, Spain·
Job description
We are: Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.
With the right people and the right ideas, there’s no limit to what we can achieve
Are you a fit? Sounds awesome, right? Now, let’s make sure you’re a good fit for the role:
Key Responsibilities
- Design, develop, and maintain scalable backend services using Node.js.
- Build and optimize cloud-native applications on AWS.
- Develop and maintain event-driven and messaging-based architectures using SQS and SNS.
- Design and manage serverless solutions with AWS Lambda.
- Work with DynamoDB to build high-performance, scalable data solutions.
- Collaborate with cross-functional teams to deliver reliable, low-latency backend services.
- Monitor, troubleshoot, and optimize system performance, availability, and scalability.
- Participate in code reviews and contribute to engineering best practices.
Must-have Skills
- +5 years of experience working as a Frontend Engineer.
- Strong experience with Node.js and backend application development.
- Hands-on experience with AWS, including:
- EC2
- Lambda
- SQS
- SNS
- DynamoDB
- Experience designing and developing scalable distributed systems.
- Knowledge of asynchronous programming and event-driven architectures.
- Experience building RESTful APIs and backend integrations.
- Strong problem-solving and debugging skills.
- Excellent communication and collaboration skills.
Nice-to-have:
- AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.
- Experience building systems that process millions of messages per day with high reliability.
- Experience designing and optimizing low-latency distributed systems.
- Knowledge of graceful degradation strategies to ensure service resilience under failure conditions.
- Experience with high-availability, fault-tolerant, and cloud-native architectures.
- Familiarity with performance optimization and scalability best practices.
Experience developing projects using frameworks.What we offer:
- A High-Impact Environment
- Commitment to Professional Development
- Flexible and Collaborative Culture
- Global Opportunities
- Vibrant Community
- Total Rewards
*Specific benefits are determined by the employment type and location.
Find out more about our culture here.
Why work at WIZELINE
- Culture: “A global community of innovators, problem‑solvers, and lifelong learners” – strong emphasis on growth, collaboration, and belonging
- Remote & Flexibility: Remote‑friendly with flexible work policy; physical offices in SF, Mexico City, Guadalajara, Barcelona, and Ho Chi Minh City
- Perks:
- Competitive compensation and total rewards
- Health benefits and wellness programs
- Savings & retirement plans
- Global mobility opportunities
- Free certifications (cloud, coding) through WizeAcademy
- Happy hours, gaming tournaments, sports activities
- Recognition:
- HRC Best Places to Work for LGBTQ+ (2019–2024)
- Expansión Super Empresas (2020–2023)
- Expansión Super Espacios de Trabajo (2020–2021)