Senior Fullstack Developer (React + Node)

Remote, Madrid·Full-time·Added 4 days ago

Initium Software

36 open roles

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Overview

Job details

Full-time hours
Per the ad.
Fully remote
Only from certain places, per the ad: “100% remoto desde España”

Requirements

Have the right to work in Spain
Initium Software doesn't mention sponsorship in the ad.
Work in English
English is required, per the ad.
Have 10+ years of experience
Senior-level role.

This job was automatically translated to English.

Pay & benefits

What you'll get

Competitive salary range: Fixed salary in accordance with your experience and the market.
Work modality: 100% remote from Spain with standard hours from 09:00 to 18:00.
Culture based on autonomy, technical rigor, and professional transparency.
Participation in global corporate projects of high technical complexity and strategic visibility.

At Initium, we don't just develop technology: we create an environment where people can evolve, add value, and leave their mark.

Apply now and let's talk.

Requirements

What we're looking for

More than 10 years of proven experience in software development with a focus on React and Node.js.
Demonstrated experience in large-scale enterprise projects, managing technical trade-offs and performance optimization.
Fluent command of English at an advanced level (C1), with the ability to debate solutions and articulate technical decisions clearly.
Ability to drive technical solutions autonomously, taking end-to-end ownership without depending on pre-digested specifications.

Nice to have

You have experience mentoring other engineers and raising the technical standard of teams.
You have solid knowledge of modern cloud computing patterns, security, and advanced web application optimization.
You are passionate about learning, sharing ideas, and evolving alongside the team.

The role

This is a remote position.

Lead the Fullstack Architecture: Senior React and Node Developer

At Initium Software, we connect the best technical talent with the most challenging and innovative projects on the market. We are not a traditional consultancy; we are strategic partners who believe in real impact through technology. We are looking for a Senior / Staff Fullstack Developer profile that combines solid technical judgment, the ability to lead architectural decisions, and a passion for building robust solutions in enterprise environments.

What you'll do

Define system architecture, evaluating monolith vs. microservices models, API design, and scalable data schemas.
Establish and safeguard software development, testing, and code review best practices across the entire stack.
Create key technical artifacts, including architecture diagrams, technical documentation, and Architecture Decision Records (ADRs).
Build prototypes and proofs of concept to validate the feasibility of innovative approaches before their implementation in production.
Collaborate actively with stakeholders and engineering teams to analyze requirements and transform complex challenges into reliable architectures.

How will we measure your impact?

Monthly fulfillment of Project efficiency objectives
Effective alignment and execution of the strategic plan

About Initium Software

Initium is a global technology consultancy specializing in digital transformation, cloud engineering, and enterprise software solutions. The company partners with major platforms such as Guidewire, Apigee, MuleSoft, ServiceNow, and Temenos to deliver complex integration and modernization projects for clients across insurance, banking, telecom, and the public sector. With a workforce of several thousand professionals spread across multiple countries, Initium operates as a nearshore and offshore delivery partner, combining technical depth in legacy and cloud-native stacks with a strong focus on quality engineering and DevOps practices.

In Spain, Initium operates a significant delivery hub in Madrid, which serves as a key nearshore center for European and global clients. The Madrid office is a multicultural, English-speaking environment that actively hires international talent, offering a clear path for relocation and professional growth. The company's culture emphasizes continuous learning, certification in partner technologies, and a collaborative, engineering-driven atmosphere, making it a relevant option for international professionals looking to build a career in Spain's growing tech sector.

Founded: 2001
Employees: 1,000–5,000
Headquarters: Madrid, Spain
In Spain: Madrid
Website: initiumsoft.com

Good to know if you are moving

The Madrid hub is a major nearshore delivery center, so international hires are common and the working language is English.
Initium offers a formal relocation package and visa sponsorship for international hires moving to Spain.
The company invests heavily in certifications on partner platforms (ServiceNow, MuleSoft, Apigee, Guidewire), which boosts long-term employability.
The Madrid office is a multicultural environment with a mix of local and expat engineers, easing the integration of newcomers.
Career paths are clearly defined, with growth toward team lead, solution architect, and delivery management roles.

All open roles at Initium Software