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Senior Full-Stack Developer (JavaScript/TypeScript)

Sarajevo (hybrid), or remote within CET time zone

Authority Partners is seeking an experienced Full-Stack Developer to design, build, and maintain scalable web applications. You'll work across the entire technology stack, from database design to user-facing features, while collaborating with cross-functional teams to deliver high-quality solutions.

Ready to build amazing web experiences? We'd love to hear from you!

What You'll Do:

  • Design and develop full-stack applications using modern technologies, using JavaScript / TypeScript, PostgreSQL, Node.js, Next.js, Express.js
  • Build and maintain RESTful APIs and serverless functions
  • Design and optimize PostgreSQL database schemas
  • Implement responsive, performant frontend interfaces with Next.js
  • Write clean, well-tested, and documented code
  • Collaborate with team members on architecture decisions
  • Deploy and monitor applications in AWS environments
  • Participate in code reviews and mentor junior developers


What We're Looking For:

  • 5+ years of experience with JavaScript (ES6+) & TypeScript
  • Strong experience with Node.js backend development with Express
  • PostgreSQL (schema design, migrations, performance)
  • Next.js (SSR, SSG, API routes, data fetching)
  • Basic AWS knowledge (Lambda, S3, IAM, CloudWatch)
  • Git version control and modern development workflows
  • Strong problem-solving abilities and architectural thinking
  • Experience with full development lifecycle from requirements to production
  • Ability to balance technical excellence with business needs
  • Collaborative mindset and excellent communication skills
  • Passion for learning new technologies and best practices
  • Understanding of agile methodologies and iterative development


Nice to have experience with:

  • ORMs (Prisma, TypeORM, Sequelize)
  • Auth & security (JWT, OAuth2, OWASP)
  • Testing (Jest, Vitest, Playwright, Cypress)
  • CI/CD, ESLint, Prettier
  • IaC (Terraform, CDK), Docker
  • System design, caching, microservices
  • Tailwind CSS, state management, accessibility



About Authority Partners:
Authority Partners is a leading and global IT services company with over 25 years of experience, serving clients within the financial, healthcare, insurance, mortgage, and technology sectors among many others. We are committed to building relationships with IT professionals who possess integrity, dedication, teamwork, and the desire to learn and grow with us. We specialize in placement for long-term contracts and permanent opportunities and helping our consultants achieve their career success.

Authority Partners is an equal opportunity employer and is committed to providing a workplace that is free from all types of discrimination, as well as from abusive or offensive behavior and harassment.

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