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Senior Fullstack Developer (Freelance, Remote)

SPACE44

SPACE44
Job Type   /   Job Level
Full-time   /   Others/Any
Company Location
Poland
Senior Fullstack Developer

Company Overview

SPACE44 builds and operates software systems for companies that need technology to work reliably in real, day-to-day operations.

We work as long-term engineering partners, embedding experienced engineers into client environments and taking responsibility for execution, stability, and ongoing improvement of production systems. Our work goes beyond traditional staffing or project delivery — we operate the systems we help build.

SPACE44 is a remote-first company. We value clear ownership, practical problem-solving, and engineers who are comfortable running real systems in production.

Who We Are Looking For

We are looking for a Senior Fullstack Developer to join a client project building and maintaining enterprise web applications. This is a hands-on delivery role with ownership across the fullstack, from backend APIs and data layers to responsive frontend interfaces. You will work as part of a distributed team with clear accountability for end-to-end feature delivery.

What You'll Do

  • Design, build, and maintain backend services and REST APIs using Node.js
  • Develop and maintain frontend applications using React and TypeScript
  • Own features across the full stack — from database schema to UI interaction
  • Work with relational and/or document databases (PostgreSQL or MongoDB)
  • Integrate frontend components with backend services and third-party APIs
  • Write clean, well-documented, and testable code across both layers
  • Conduct code reviews and provide constructive feedback to peers
  • Participate in Agile/Scrum processes including sprint planning and daily standups
  • Communicate proactively with team members and client stakeholders
  • Log time accurately and maintain clear documentation of work progress

Requirements

  • 8+ years of professional experience in fullstack development
  • Strong backend experience with Node.js in production environments
  • Expert-level React.js with a track record of complex frontend delivery
  • Strong proficiency in JavaScript (ES6+) and TypeScript across frontend and backend
  • Hands-on experience with PostgreSQL or MongoDB
  • Solid understanding of REST API design and integration patterns
  • Solid CSS skills including SCSS/SASS
  • Experience with state management (Redux or Context API)
  • Proficiency with Git version control
  • Track record of reliable, consistent delivery in remote teams
  • Strong ownership mentality — you deliver what you commit to
  • Comfortable with structured processes and daily reporting
  • Business-fluent English (written and verbal)

Nice to Have

  • Next.js
  • AWS or cloud platform experience
  • CI/CD pipelines
  • Docker
  • Jest or React Testing Library

Embark on your SPACE44 journey with a few simple steps

  • Hireflix Chat (20 min): Share how you work and what matters most to you
  • HR Sync (45 min): Connect your experience with our goals
  • Code Challenge: Complete a 1-2 hour coding session
  • Psychometric Insight: Take a 1-hour assessment exploring your strengths and working style

Working Model and Benefits

  • Flexible Work Schedule: Enjoy a non-linear workday designed to enhance productivity and maintain a harmonious work-life balance, with core hours for team collaboration
  • Professional Growth: Access training opportunities to boost your career prospects
  • Innovative Projects and Tools: Engage in cutting-edge projects using the latest tools and technologies within a progressive remote work environment
  • Competitive Income: Receive competitive compensation with regular performance reviews and potential raises every six months
  • Global Team Dynamics: Collaborate with a diverse, international team that values openness and teamwork
  • Fully Remote Environment: Work from anywhere with normal business hours and flexibility, no on-call rotation
  • Gradual Onboarding: Start with a planned transition as you get up to speed with our systems and processes

Jobs in Poland   »   Jobs in Warsaw, Mazowieckie, Poland   »   Senior Fullstack Developer (Freelance, Remote)

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