Reaktor

Senior Fullstack Developer

Reaktor
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2 months ago
Helsinki, FinlandSenior

Responsibilities

  • Build and improve modern web applications, backend services, APIs, and data models.
  • Work across frontend, backend, and infrastructure according to client project needs.
  • Help clients select suitable technologies, architectures, and delivery approaches.
  • Contribute to cloud environments, deployments, CI/CD pipelines, and production quality.
  • Debug, test, monitor, and improve production-grade systems.
  • Work on customer-facing services, internal platforms, identity, martech, customer support, analytics, online stores, integrations, developer tooling, or SDKs.
  • Collaborate directly with client technology teams, business stakeholders, designers, product teams, and other disciplines.
  • Clarify ambiguous requirements and turn them into working software.
  • Take responsibility for delivery while supporting the wider team.
  • Use modern development practices, including AI-assisted development tools and workflows.

Requirements

  • Strong experience in modern frontend development, such as TypeScript and React or comparable technologies.
  • Strong experience in backend service development, such as Node.js, Java, Kotlin, Scala, Clojure, or Python or comparable technologies.
  • Experience building, shipping, and improving production-grade digital products.
  • Ability to work across implementation, testing, deployment, and production operations.
  • Understanding of cloud environments, CI/CD, deployments, and production system operations.
  • Ability to work directly with clients, stakeholders, and other disciplines in a senior consultative role.
  • Strong problem-solving skills and ability to bring clarity to ambiguous product or technical situations.
  • Hands-on mindset with the ability to contribute technically and help teams progress.
  • Fluent written and verbal English.
  • Experience with customer-facing digital products, online services, ecommerce, subscriptions, internal platforms, analytics, martech, or similar domains is preferred.
  • Experience with high-traffic or business-critical production systems is preferred.
  • Deeper experience with platform engineering, infrastructure-as-code, or DevOps practices is preferred.
  • Experience with internal tools, integrations, SDKs, or developer tooling is preferred.
  • Familiarity with mobile development or React Native is preferred.
  • Finnish language skills are preferred.

Benefits

  • Hybrid work involving the office, client premises, and remote work depending on the client project and team needs.
  • Work in a low-hierarchy environment with an international community and varied client projects.

Tech Stack

Reaktor

About Reaktor

501-1,000 employees
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