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Fullstack Software Engineer (React/Next.js, XML, Domibus AS4) (m/f/n)
Shimi Sp. z o.o.Globalnie
We are currently looking for an experienced Fullstack Software Engineer to join a long-term project for a European Union institution. You will be involved in the development, integration, and maintenance of modern full-stack applications within an international environment, supporting digital public services and cross-border cooperation initiatives across Europe.
Responsibilities:
Develop and maintain frontend and backend application components.
Build modern web interfaces and integrate them with backend services and APIs.
Write clean, maintainable, and well-tested code.
Perform troubleshooting, debugging, and resolution of technical issues.
Conduct unit and integration testing.
Create and maintain technical documentation.
Deliver solutions that meet both functional and non-functional requirements.
Support application deployments and releases using CI/CD practices.
Participate in the maintenance and continuous improvement of existing solutions.
Collaborate with stakeholders, technical leads, and development teams in an Agile environment.
Requirements:
Education: University degree at Master's level, Master's degree (MSc, MA, MEng or equivalent).
Professional Experience: Minimum 5 years of professional software development experience.
Frontend Technologies:
TanStack React Query – minimum 4 years.
React and Next.js – minimum 6 years.
Tailwind CSS – minimum 6 years.
Backend Technologies:
Fastify – minimum 6 years.
Experience with Axios, Pino, and Vitest – minimum 6 years.
Experience integrating with AS4 messaging solutions (e.g. Domibus AS4 Backend API or equivalent) – minimum 2 years.
Development Tools & Technologies:
GitLab for source code management and CI/CD – minimum 3 years.
pnpm, Nx, and Biome – minimum 5 years.
Experience with XML, XSLT, xml-js, xml-crypto, xmllint-wasm, and Saxon-JS – minimum 2 years.
Additional Expertise:
Minimum 1 year of experience working with information systems implementing the Once-Only Principle, preferably within public administration or public-sector environments.
Language: English – minimum B2 level (CEFR).
Nice to Have:
Experience working in Agile development environments.
Familiarity with Agile ceremonies, including sprint planning, reviews, retrospectives, and daily stand-ups.
EU citizenship is mandatory.
Candidates must perform their work from the territory of a European Union Member State.
What We Offer:
Long-term B2B cooperation with SHIMI.
Project duration of up to 48 months.
Rate: 380-450/MD nett
Primarily remote work from within the European Union.
Mostly remote setup. Services must be performed from within the EU. One/Two physical meetings with the customer are foreseen per 12-month period, max 2 days each. These planned meetings are at contractor’s cost.
International and multicultural working environment.
Collaboration with highly skilled professionals from across Europe.
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