Senior Full-Stack Developer

Cognitive Systems

$100K — $120K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science or equivalent experience
  • 5+ years of professional software development experience
  • Strong front-end development skills
  • Proficient in React.js and JavaScript/TypeScript
  • Experience with Node.js and REST API development
  • Familiarity with Docker and PostgreSQL
  • Working knowledge of Agile methodologies and version control systems

Responsibilities

  • Develop and maintain full-stack web applications with a focus on user interfaces
  • Build REST APIs and backend services for product features
  • Transform complex WiFi sensing data into clear insights and workflows
  • Collaborate with cross-functional teams to design and enhance scalable features
  • Write clean, maintainable code and ensure high-quality testing
  • Improve application performance and usability

Benefits

  • Promotes a healthy work-life balance with flexible work options
  • Five weeks of paid annual leave
  • Excellent extended health benefits plan
  • Fitness and wellness credit available
  • Free catered lunch provided daily
Full Job Description
THE ROLE: Senior Full-Stack Developer

ABOUT YOU
You're a passionate and capable Senior Full-Stack Developer who enjoys building thoughtful, intuitive products and solving complex technical problems.

You get excited about creating user interfaces that make complex data easy to understand and act on. You're comfortable working across the stack, take ownership of your work, and thrive in a fast-paced environment alongside a small, highly skilled, and motivated team.

WHAT YOU'LL DO
• Develop and maintain full-stack web applications, with a strong focus on intuitive, reliable, and responsive user interfaces.
• Build REST APIs and backend services that support product features, data integrations, and customer-facing applications.
• Turn complex WiFi sensing and technical data into clear workflows, insights, and visualizations.
• Collaborate closely with engineering, product, design, and data science teams to design, test, release, and continuously improve scalable cloud-based features.
• Write clean, maintainable, and well-tested code.
• Help improve application performance, reliability, usability, and the long-term quality of our platform.

WHAT YOU'LL NEED
• Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
• 5+ years of professional software development experience, with strong experience in front-end development.
• A team-oriented mindset with a willingness to take ownership and drive solutions forward.
• Strong proficiency in React.js.
• Strong proficiency in JavaScript/TypeScript and Node.js.
• Hands-on experience designing and developing REST APIs.
• Experience working with Docker and Docker Compose.
• Experience with PostgreSQL.
• Experience with automated testing frameworks such as Jest or Vitest.
• Experience working in an Agile development environment, including JIRA and Git-based version control.

BONUS POINTS FOR
• Experience with cloud technologies such as AWS and Kubernetes.
• Experience with message brokers, and time-series databases.
• Experience developing or supporting large-scale IoT platforms using MQTT.
• Experience working with data-intensive applications, dashboards, or visualization tools.

Don't tick all the boxes? We believe motivation and growth potential are highly valuable characteristics in a job candidate.

We promote a healthy work-life balance in a flexible work environment and offer competitive salaries, an excellent extended health benefits plan, five weeks of paid annual time off, a fitness and wellness credit, and a free catered lunch in the office every day.

Most importantly, you'll have the opportunity to work on innovative technology designed to make a meaningful difference in people's lives.

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