Senior Backend Engineer | Feeld

Jobgether; Spain; Remote; EUR 65,000 - 95,000; Full time

Benefits offered by this job

Health insurance

Well-being support

Sports benefits

Learning budget

Paid vacation

Paid sick leave

Public holidays

Remote working

Integrated team experience

Long-term collaboration

Team connection

Job summary

Jobgether is seeking a Senior Backend Engineer to join a partner company based in Spain. You will design and evolve scalable backend services using Node.js, NestJS, TypeScript, and AWS, building resilient APIs with GraphQL/REST and real-time features via WebSockets.

You will own complex challenges, mentor peers, write tests, and help define architectural direction for a mobile-first platform. You will collaborate with Product and QA, ensure data integrity, and contribute to observability with

Qualifications

• 5+ years of backend development experience with Node.js.

Responsibilities

• Design, develop, and deploy scalable backend services using cloud-first architectures.
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Skills

Node.js

TypeScript

NestJS

GraphQL

REST

WebSockets

AWS

NoSQL

DynamoDB

PostgreSQL

CloudWatch

Datadog

Sentry

Terraform

Apollo

Firebase

Stream Chat

Cloudflare

Snowflake

English

React Native

Tools

AWS

DynamoDB

SQS

EventBridge

PostgreSQL

GraphQL

REST API

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Backend Engineer based in Spain.

As a Senior Backend Engineer, you will help develop and strengthen the backend infrastructure of an inclusive, mobile-first digital platform. You will take ownership of complex technical challenges, investigating and resolving backend issues while improving system performance, scalability, and reliability. Working primarily with Node.js, NestJS, TypeScript, and AWS, you will build resilient services and APIs that support a growing user base. You will also contribute to real-time functionality and event-driven architectures while safeguarding data integrity. Collaborating closely with Product, QA, and other engineering teams, you will help shape technical decisions and deliver meaningful product improvements. This remote opportunity offers significant autonomy and the chance to contribute to a product focused on creating more inclusive human connections.

Accountabilities

You will play a key role in the development, optimization, and maintenance of backend systems, combining hands-on engineering with technical investigation and architectural contributions.

• Design, develop, and deploy scalable, resilient backend services using cloud-first architectures, NoSQL databases, and event-driven technologies.
• Investigate complex backend issues, lead technical troubleshooting, identify root causes, and define clear paths toward resolution.
• Optimize system performance, reliability, availability, and data integrity as the platform scales.
• Build and maintain well-structured, self-documented APIs using NestJS, GraphQL, and REST.
• Develop and maintain real-time application features using WebSockets.
• Contribute to architectural decisions and technical direction, working independently and taking ownership of complex initiatives.
• Collaborate with cross-functional teams, including Product Management and QA, to design, deliver, and improve high-quality features.
• Implement effective unit and integration tests to ensure code quality and system stability.
• Apply observability and monitoring practices to identify issues, track performance, and improve operational resilience.
• Develop a strong understanding of the product and its mobile-first environment to ensure backend solutions support user and business needs.

Requirements

The ideal candidate is an experienced backend engineer with strong Node.js expertise, a solid understanding of cloud infrastructure and distributed systems, and the ability to contribute independently in a collaborative product environment.

• At least 5 years of professional backend development experience using Node.js.
• Strong proficiency in TypeScript.
• Demonstrated experience building backend services and self-documented APIs with NestJS, using GraphQL and/or REST.
• Strong understanding of event-driven architectures, NoSQL databases, and cloud-native application development.
• Hands-on experience with AWS services, particularly ECS, DynamoDB, SQS, EventBridge, and PostgreSQL.
• Practical experience developing real-time features using WebSockets.
• Familiarity with observability and monitoring tools such as Sentry, Datadog, CloudWatch, and Amplitude.
• Experience writing reliable unit and integration tests.
• Previous experience in a mobile-first organization, with the ability to understand product requirements from an engineering perspective.
• Strong problem-solving and analytical skills, including the ability to investigate complex systems and work through technical challenges independently.
• Full professional proficiency in English.
• Strong collaboration and communication skills, with the flexibility to adapt to different working approaches.

Additional experience that would be an advantage:

• Experience with Infrastructure as Code tools, particularly Terraform.
• Familiarity with specialized services and platforms such as Apollo, Firebase Authentication, Stream Chat, Cloudflare, and Snowflake.
• Knowledge of globally distributed systems and large-scale application architecture.
• Interest or experience in machine learning and AI-powered recommendation engines.
• A test-driven mindset, with an emphasis on automation, efficiency, and continuous improvement.
• Familiarity with mobile development technologies, particularly React Native.

Benefits

• Health insurance: Access to health coverage.
• Well-being support: Dedicated well-being coverage.
• Sports benefits: Sport coverage to support an active lifestyle.
• Learning budget: Financial support for continuous learning and professional development.
• Paid vacation: Paid annual leave.
• Paid sick leave: Time off to recover when needed.
• Public holidays: All public holidays are paid days off.
• Remote working: Work remotely as part of an international, distributed team.
• Integrated team experience: Work directly with the client's team, using its tools and technologies and collaborating closely with its members.
• Long-term collaboration: Join an extended-team model designed around projects that can last several years.
• Team connection: Opportunities to participate in client visits, team-building activities, and informal team events.

How Jobgether works:

We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.

We appreciate your interest and wish you the best!

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.