Mobile Engineer (React Native / Swift / JS / Python)

🌟 Early-Career Engineer:

Start your engineering career at 3Pillar, the premier destination for ambitious junior engineers ready to learn the craft alongside world-class teams. Picture pairing with senior engineers, shipping code that runs in production for global enterprise customers, and contributing to mobile platforms that support clinical research operations across the globe. Our mission is to revolutionize healthcare software, and your curiosity and growth are integral to achieving this ambitious goal.

Your role extends beyond writing code; you will help architect and develop key services that power our mobile platform — built around a modern Python and JavaScript stack — and contribute to one of the most impactful software products in the clinical trial industry. Join us and grow into the kind of engineer who shapes the next decade of healthcare technology. 🔮🌐

It´s a contractor role: around 6-9 months

Key Responsibilities:

• Facilitate effective communication with the team and project stakeholders regarding progress, blockers and recommendations.

• Contribute to the development of new features in React Native, JavaScript and Swift under the guidance of senior engineers, applying modern best practices.

• Implement responsive UI using CSS / Flexbox layout patterns within React Native components.

• Conduct and participate in thorough code reviews — both as an author who responds to feedback and as a reviewer who learns from reading others' code.

• Engage in agile ceremonies: stand-ups, sprint planning, retrospectives, and estimation.

• Collaborate with cross-functional teams (backend engineers, QA, designers, product managers) to deliver a world-class mobile experience.

• Stay up-to-date with the latest trends in React Native, Swift, and native iOS / Android development.

Minimum Qualifications:

• Minimum Qualifications:

• Working knowledge of JavaScript and Swift in a professional or substantial project setting.

• Hands-on experience with React Native development for iOS and/or Android.

• Comfortable with CSS / Flexbox layout principles applied to React Native or web UI.

• Active participation in code-review processes — both as author and reviewer.

• Familiarity with Git-based workflows on GitLab (branching, merge requests, code reviews).

• Exceptional problem-solving skills with a focus on delivering clean, maintainable code.

• Strong communication skills and ability to work collaboratively in a team environment.

• English proficiency.

Must-Have Skills & Tools:

• Languages: JavaScript, Swift, Python.

• Frameworks: React Native.

• UI: CSS / Flexbox.

• Practices: Code reviews.

• Tools: Git (GitLab).

Good to Have Skills:

• Languages: Objective-C, Java.

• Native iOS development (Swift / Objective-C).

• Native Android development (Java / Kotlin).

• React.

• Experience working in agile / Scrum delivery.

• Tools: Android Studio, Xcode, Visual Studio.

Good to Have Skills:

• Experience with Expo, Expo EAS, and CI/CD pipelines for mobile (Fastlane, Bitrise, GitHub Actions).

• Healthcare or regulated-industry software development experience.

• 3+ years professional mobile development experience.

• Strong communication skills and English proficiency.

Additional Experience Desired:

TypeScript.

AWS services (e.g. S3, Lambda, ECS / EKS, RDS, IAM).

SQL Alchemy (ORM) and Alembic database migrations.

Snowflake or another cloud data warehouse.

OAuth 2.0 authentication and authorization flows.

Familiarity with collaboration tools: Jira, Confluence, Slack/Teams, VS Code.