Senior Fullstack Developer

Reaktors 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 were 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.

Your daily tasks may include:

• 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

To thrive in this position youll need:

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 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-haves

• 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.

Required Experience:

Senior IC