Senior Fullstack Software Engineer JavaScript / TypeScript

Job description

Spain - Remote

Rithum™ is the world’s most trusted commerce network, accelerating how brands, suppliers, and retailers work together to deliver seamless e-commerce experiences.

We provide an unmatched platform for brands and retailers, enabling them to accelerate growth, optimise operations across channels, scale product offerings and enhance margins.

Today, more than 40,000 companies trust Rithum to grow their business across hundreds of channels, representing over $50 billion in annual GMV.

Using our commerce, marketing, and delivery solutions, our customers create optimised consumer shopping journeys from beginning to end.

Overview

The Engineering Team employs some of the top engineering talent who are constantly working to improve processes, quality and techniques, with the goal of producing the highest quality software solutions in the industry.

The lines between traditional QA and software engineering are blurred here, with quality being considered at all stages of development.

Our team is comprised of very talented and highly motivated individuals, who pride themselves on working smarter, not harder.

We’re empowered to make local decisions, reducing the overhead of getting things done.

We aim for operational excellence, having a DevOps culture and a “you build it, you run it” mentality.

We favor a Lean approach to our product development, following agile workflows such as Scrum and Kanban depending on the directive of the team.

We welcome new technologies and are constantly self-evaluating our tech stack to make sure we are providing software of the highest quality.

Continuous Delivery is important to us, and we are constantly looking to improve our automated testing and continuous integration.

As a Senior Software Engineer for our Retailers business function, you are responsible for writing efficient, well-structured, and maintainable code, setting an example for other engineers as a subject matter expert, mentoring and guiding less experienced engineers.

You work closely with our lead designers and architects to drive our product forward and to ensure the scalability, maintainability and performance of our product suite.

Responsibilities

• Provide guidance on system architecture decisions, making sure the technical direction aligns with business goals.
  
  
• Conduct thorough code reviews, ensuring best practices are followed, identifying potential issues, and mentoring junior developers in improving their coding skills.
  
  
• Provide technical guidance, share knowledge, and help junior and mid-level engineers grow in their roles by reviewing their work and offering constructive feedback.
  
  
• Work closely with other teams to ensure seamless delivery of software projects and alignment across departments.
  
  
• Be able to break down large, complex tasks into smaller, manageable components and distribute them among team members.
  
  
• Play a key role in agile processes, including sprint planning, daily stand‑ups, retrospectives, and prioritization of tasks.
  
  
• Communicate effectively with stakeholders, including product managers, designers, and clients, to clarify requirements and ensure alignment with business objectives.
  
  
• Handle complex technical challenges, debugging, and resolving issues that may be beyond the scope of junior engineers.
  
  
• Integrate AI tools throughout the development lifecycle with critical evaluation for security, performance, and maintainability.
  
  
• Build and maintain AI API integrations with proper error handling, caching, and observability.
  
  
• Mentor team members on effective AI tool usage and establish team‑level best practices.
  
  
• Apply compliance standards to all AI implementations.
  
  
• Participate in on‑call rotation to support the “you build it you own it” mantra.
  
  
• Understanding and utilization of software development tools including version control, building processes, debuggers, and test frameworks for:
  • Primary technologies (may include):
    • Typescript, Angular
    • JavaScript, Node.js, React.js
    • Python
    • AWS services (Lambda, DynamoDB, OpenSearch, Kinesis, API Gateway, Step Functions, and others)
    • IaC: Terraform, CloudFormation, Serverless
  • Secondary technologies
    • AWS services (OpenSearch, Lambda, DynamoDB, Kinesis, RDS, ECS, and others)
    • SOAP/REST web service APIs
    • Redis, NoSQL
    • AWS SageMaker, Glue
    • Microsoft SQL Server

Qualifications

Minimum Qualifications

• 3+ years' experience developing in AWS Technologies
• 2+ years of experience integrating AI tools into production software development workflows
• Proven track record of building and maintaining AI API integrations in production systems
• Experience automating workflows with AI tools and measuring productivity impact
• Demonstrated ability to mentor others on AI development practices
• Knowledge of compliance standards relevant to AI implementations (data privacy, security)
• Experience developing web applications, working with databases, and consuming APIs
• Understanding of relevant software development tools including version control, build processes and test frameworks
• Ability to work independently with limited supervision

Preferred Qualifications

• Bachelor's degree or higher in Computer Science or a closely related field
• 2+ years of AI/ML experience with a strong technical and strategic focus, with expertise in machine learning algorithms, NLP, computer vision, or large‑scale deployment.
  
  
• 2+ years expertise in machine learning algorithms, NLP, computer vision, or large‑scale deployment.
  
  
• 2+ years' experience in creating data systems for feature stores or vector databases.
  
  
• Experience with cloud computing infrastructures such as AWS or Azure
• Use of source code repositories such as Azure DevOps and Git
• Experience working with SQL Server and NoSQL databases
• Experience with performance tuning and optimization techniques for high scale systems
• Experience working with development teams in multiple time zones
• Proven track record of creating secure and scalable software that scales to dozens or hundreds of servers in a distributed, fault tolerant manner
• Experience with e-commerce, retail, online marketplaces, or digital advertising
• Excellent analytical, decision‑making and problem‑solving skills
• Proven ability to work in a rapidly changing environment with keen attention to detail

Travel Required

Up to 10%

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities required of the employee for this job.

Duties, responsibilities, and activities may change at any time with or without notice.

What it’s like to work at Rithum

When you join Rithum, you can expect to work with smart risk‑takers, courageous collaborators, and curious minds.

As part of the Rithum team, you are valued, supported, and included.

Guided by a transparent culture and accessible, approachable leadership, we offer career opportunities aligned to your ambitions and talents.

To ensure work and life balance works for you, we also offer an array of resources to support you and your families, including comprehensive benefits and wellness plans.

At Rithum you will:

• Partner with the leading brands and retailers.
  
  
• Connect with passionate professionals who will help support your goals.
  
  
• Participate in an inclusive, welcoming work atmosphere.
  
  
• Achieve work‑life balance through remote‑first working conditions, generous time off, and wellness days.
  
  
• Receive industry‑competitive compensation and total rewards benefits.
  
  
• Medical, Dental and Psychology benefits
• Life insurance and disability benefits
• Competitive time off package with 25 Days of PTO, 8 Company‑paid Holidays, 5 paid floating holidays (new in 2026!), 2 Wellness days and 1 Paid Volunteer Day
• Voucher program for Transportation, Meals & Childcare
• Remote Working Stipend: €40/month automatically applied in payroll
• Access to tools to support your wellbeing such as the Calm App and an Employee Assistance Program
• Professional development stipend and learning and development offerings to help you build the skills and connections you need to move forward in your career.
  
  
• Charitable contribution match per team member

Rithum is an equal opportunity employer.

We are committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and teammates without regard to race, religion, color, sex, gender identity, sexual orientation, age, non‑disqualifying physical or mental disability, national origin, veteran status or any other protected characteristic.

All employment is decided on the basis of qualifications, merit, and business need.

We're committed to providing reasonable accommodations in accordance with the law for qualified applicants.

If you require assistance during the interview process due to a medical condition or need support accessing our website or completing the application process, please reach out to us by completing the Accommodations Request Form.

Your comfort and accessibility are important to us, and we're here to ensure a seamless experience as you explore opportunities with our team.

At Rithum, we take your privacy seriously and want to make sure your personal information is safe and secure.

Please take a few moments to review any notices that are applicable to your region here:

Spain Equality Plan - Gender

In alignment with the Spanish Government's efforts to foster gender equality through the implementation of Gender Equality Plans, Rithum is committed to promoting equal treatment and opportunities for all genders.

To this end, we have developed and actively uphold our Gender Equality Plan, which includes monitoring the gender distribution among our job applicants.

Our goal is not just to comply with regulations but use any actionable insights to help inform our hiring strategies.

Required Skill Profession

It & Technology