Reaktor
Senior Fullstack Developer
2d ago
EuropeSeniorRemoteweb applicationsbackendapicloudci/cddebuggingtestingmonitoring
Experienced Senior Fullstack Developer working across modern web applications, backend services, and production systems, supporting a range of digital products for clients.
Requirements
- 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
- We do not have a hard requirement around years of experience, but we have noticed that this level of fullstack, client-facing and production ownership usually takes several years of professional experience to build.
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
Other
- 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.
- You will support clients across a range of digital product, platform and service domains. The exact client context may vary from focused product teams to large international companies working on high-traffic, business-critical services.
- Many of our clients are technically mature and expect a high level of expertise from our consultants. This means you will need to be hands-on, pragmatic and comfortable helping both the client and the team make good technical decisions.
- 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
- Willingness to work in a hybrid setup. This means balancing office, client premises and remote work depending on the client project and team needs.