Backend Developer Work Modality:

Barcelona - Hybrid (3 days per week on-site)

Schedule:

Full-time

Contract type:

Indefinite

Brief Description We are looking for a

Backend Developer

to join our team and contribute to the development of our next-generation project repository. If you are passionate about scalable architectures, cloud services, and high-performance backend solutions, this is an opportunity to work on cutting-edge technology in the blockchain and fintech space.

Key Responsibilities

Backend Development:

Design, develop, and maintain backend services and APIs using

Node.js, TypeScript , and

serverless frameworks .

Integration with AWS Services:

Implement integrations with AWS services such as

SNS, SQS, API Gateway , and

Lambda functions .

Database Management:

Manage and optimize

PostgreSQL

databases using

Sequelize ORM

and

Sequelize TypeScript .

Performance Optimization:

Identify and resolve performance bottlenecks, implement caching mechanisms, and ensure

optimal response times

for backend services.

Serverless Deployment:

Deploy and manage serverless applications using

Serverless Framework

and

esbuild

for efficient bundling.

DevOps & Tooling:

Work with

CI/CD pipelines , automate infrastructure provisioning, and ensure effective

monitoring and logging

of backend systems.

Testing & Quality Assurance:

Write

unit tests, integration tests , and participate in

code reviews

to maintain high code quality and reliability.

Documentation & Collaboration:

Contribute to

technical documentation , mentor junior developers, and collaborate closely with

frontend and cross-functional teams .

Requirements

Bachelor’s or Master’s degree in

Computer Science, Engineering , or a related field.

2+ years

of experience as a

Backend Developer .

Strong knowledge of

Node.js, TypeScript , and modern backend technologies.

Proficiency in

PostgreSQL

and





Sequelize ORM with TypeScript .

Familiarity with

serverless architectures

and deployments using

Serverless Framework .

Strong understanding of

design patterns, SOLID principles , and backend development best practices.

Excellent

problem-solving skills

and ability to work in a

fast-paced, collaborative environment .

Intermediate English level .

Bonus Points

AWS certification

(e.g., AWS Certified Developer - Associate).

Experience in

building and maintaining scalable and distributed systems .

Knowledge of

event-driven architectures

using AWS

SNS, SQS , and

event sourcing patterns .

Contributions to

open-source projects

or active participation in

developer communities .

If you are looking for a challenge in backend development, working with

scalable, high-performance architectures , and

cloud-native technologies , we would like to hear from you.

AI and Blockchain

knowledge or interest.

Soft Skills

Problem Solving

Teamwork & Collaboration

Communication Skills

Adaptability & Continuous Learning

Mentoring & Knowledge Sharing

Company Benefits

Hybrid work model and adaptable hours.

Worldwide telework for 4 weeks per year.

Health coverage

Compensation and benefits package

Birthday day off

Wellness programs

Why Brickken?

Rebuilding at Its Core: Innovation alone is not enough to describe our daily tasks, as we aim to be better than we were yesterday. We have the ability to question and enhance our work continuously.

Global Impact: Your work will cross borders and transform the vision of the fintech landscape on a global scale.

Growth and Learning: We foster an environment of continuous learning and personal development.

Teambuilding: Being united is the most important thing for us, which is why we organize internal workshops.

Startup Environment & Collaborative Culture: You'll be part of a dynamic international team ( +10 nationalities) that values creativity, diversity, and inclusivity.

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📌 Backend Developer (Madrid)
🏢 Brickken
📍 Madrid