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Reaktor Innovations Oy logo

Senior Fullstack Developer

Job Overview

Location

Lisbon

Job Type

Full-time

Category

Software Engineering

Date Posted

July 4, 2026

Full Job Description

đź“‹ Description

  • • Build and improve modern web applications, backend services, APIs, and data models across client projects
  • • Work across frontend, backend, and infrastructure layers based on evolving client project needs
  • • Advise clients on suitable technologies, architectural approaches, and delivery methodologies for digital products and platforms
  • • Contribute to cloud environments, CI/CD pipelines, deployment processes, and production system reliability
  • • Debug, test, monitor, and optimize production-grade systems to ensure high availability and performance
  • • Develop products or tooling for customer-facing services, internal platforms, identity systems, martech, customer support, analytics, online stores, integrations, or developer SDKs
  • • Collaborate directly with client tech teams, business stakeholders, designers, product managers, and cross-functional disciplines
  • • Clarify ambiguous requirements and translate them into functional, high-quality software solutions
  • • Take ownership of delivery outcomes while ensuring team support and inclusive collaboration
  • • Apply modern development practices, including the use of AI-assisted tools and workflows to enhance productivity and code quality
  • • Engage in consultative client interactions, providing technical leadership and pragmatic decision-making in high-stakes environments
  • • Work on diverse domains including ecommerce, subscriptions, internal platforms, analytics, and developer tooling
  • • Maintain technical credibility by actively contributing to hands-on development, not just oversight or architecture
  • • Adapt to hybrid work models involving office, client site, and remote work depending on project and team requirements
  • • Communicate clearly and effectively in fluent English with international teams and clients

🎯 Requirements

  • • Strong experience in modern frontend development with TypeScript, JavaScript, React, or comparable technologies
  • • Strong experience in backend service development with Node.js, Java, Kotlin, Scala, Clojure, Python, or comparable technologies
  • • Proven experience building, shipping, and improving production-grade digital products
  • • Comfort working across the full delivery lifecycle from implementation to testing, deployment, and production operations
  • • Understanding of cloud environments, CI/CD, and production system operations
  • • Ability to work directly with clients and stakeholders in a senior, consultative role
  • • Strong problem-solving skills and ability to bring clarity to ambiguous technical or product situations
  • • Hands-on mindset with active contribution to development work
  • • Fluent verbal and written English skills for international collaboration

🏖️ Benefits

  • • Opportunity to work in a low-hierarchy, collaborative tech community
  • • Exposure to technically mature clients and high-traffic, business-critical systems
  • • Flexibility to work across diverse digital product domains including ecommerce, martech, and developer tooling
  • • Support for using modern development practices including AI-assisted tools

Skills & Technologies

Python
JavaScript
TypeScript
Java
Kotlin
Full Stack
Senior
Remote

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About Reaktor Innovations Oy

Reaktor is a technology consulting company that helps businesses transform through digital innovation. They specialize in creating custom software solutions, digital strategies, and user experiences. Their services span across various industries, including retail, finance, and public sector, enabling clients to leverage cutting-edge technologies like AI, cloud computing, and data analytics. Reaktor focuses on building long-term partnerships, delivering tangible business value, and fostering a culture of continuous learning and experimentation. They are known for their agile methodologies and a strong emphasis on talent development, aiming to be a catalyst for their clients' digital evolution and competitive advantage in the modern marketplace.

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