About the Position

Reaktor's tech community is looking for an experienced Senior Fullstack Developer to join one of our Business Units in Lisbon. If you are comfortable working across modern web applications, backend services, and production systems, enjoy solving ambiguous problems with clients, and are curious to work in a low-hierarchy environment, you might just be what we’re looking for.

Responsibilities

Building and improving modern web applications, backend services, APIs, and data models
Working across frontend, backend, and infrastructure depending on the needs of the client project
Helping clients choose suitable technologies, architecture, and delivery approaches
Contributing to cloud environments, CI/CD pipelines, deployments, and production quality
Debugging, testing, monitoring, and improving production-grade systems
Working on products or tooling related to customer-facing services, internal platforms, identity, martech, customer support, analytics, online stores, integrations, developer tooling, or SDKs
Collaborating directly with client tech teams, business stakeholders, designers, product people, and other disciplines
Clarifying ambiguous requirements and turning them into working software
Taking responsibility for delivery while making sure the team is supported and no one is left behind
Using modern development practices, including openness to AI-assisted development tools and workflows

Requirements

Must-haves

Strong experience in modern frontend development, for example with TypeScript, JavaScript, React, or comparable technologies
Strong experience in backend service development, for example with Node.js, Java, Kotlin, Scala, Clojure, Python, or comparable technologies
Experience building, shipping, and improving production-grade digital products
Comfortable working across the full delivery lifecycle, from implementation to testing, deployment, and production quality
Understanding of cloud environments, CI/CD, deployments, and how production systems are operated
Ability to work directly with clients, stakeholders, and other disciplines in a senior, consultative role
Strong problem-solving skills and the ability to bring clarity to ambiguous product or technical situations
A hands-on mindset - you are technically credible, actively contribute to the work, and help the team move forward
Fluent verbal and written English skills to collaborate in an international environment

Nice to Have

Experience from customer-facing digital products, online services, ecommerce, subscriptions, internal platforms, analytics, martech, or similar product domains
Experience with high-traffic or business-critical production systems
Deeper experience with platform engineering, infrastructure-as-code, or DevOps practices
Experience with customer-facing products, internal tools, integrations, SDKs, or developer tooling
Familiarity with mobile development or React Native
Finnish language skills

Adaptability

Willingness to work in a hybrid setup. This means balancing office, client premises, and remote work depending on the client project and team needs.

About the Company

Reaktor is a leading tech company that provides innovative solutions and services to clients across various industries. We pride ourselves on fostering a collaborative and inclusive work environment where creativity and technical excellence thrive.

We Offer

Competitive salary
Opportunity to work in a dynamic and innovative environment
Professional growth and development opportunities
Flexible work arrangements, including remote and hybrid options
A supportive and diverse team culture

Senior Fullstack Developer

Job description