Senior Full-Stack / Backend Engineer (Contract, Remote)

At INFUSE, innovation drives us. We unite forward-thinkers who anticipate how technology shapes business and deliver high-impact projects with real potential.
We are looking for a startup-savvy Senior Full-Stack / Backend Engineer with a strong MVP mindset and proven experience building scalable, maintainable systems with extensive integration work. This is a project-based contract focused on delivering an internal product primarily backend-driven (80%) with some frontend responsibilities (20%).
Our internal product will feature well-designed, robust APIs enabling seamless integration with other systems, built for scalability and ease of maintenance by future teams.

Key responsibilities:

• Develop backend APIs and databases that are scalable and maintainable.
• Integrate and manage third-party APIs for seamless data flow.
• Build frontend components delivering responsive UIs with modern frameworks.
• Analyze data and build efficient data pipelines (preferred but not mandatory).
• Drive the full product lifecycle from MVP through scalable production release.
• Collaborate closely with cross-functional teams to translate business needs into
  technical solutions.

Qualifications:

• Proven expertise in backend development, API design, and database management.
• Solid knowledge and hands-on experience with frontend technologies and frameworks (mid-level or higher).
• Experience with data analysis and pipeline construction is a plus.
• Skilled in modern development tools and AI-assisted coding (e.g., Cursor, Copilot).
• Prior experience in data/web scraping, MarTech, or SalesTech is highly desirable.
• Strong architectural mindset focused on scalability, maintainability, and clean integration
  points.
• Tech stack is flexible; current systems include Python, PHP (Laravel, Symfony), React, or Vue, hosted primarily on AWS.
• Language: Ukrainian/Russian required, fluent English (upper-intermediate or higher).

Personal Attributes:

• Self-motivated with strong organizational skills
• Problem-solver who thrives on complex challenges

We offer:

• Opportunity to work on great innovative and transforming projects;
• Professional development;
• Competitive compensation in USD;
• Professional, friendly, fast-growing team;
• Reduced Fridays during summer.

Work schedule - Monday to Friday from 1:00 PM to 9:30 PM/10:00 PM EEST (Kyiv Time), including a 30-minute/1-hour break