Senior Software Engineer (Java & React)

Are you passionate about building scalable, high-impact applications and solving complex algorithmic challenges? At First Factory, we're looking for an exceptional Senior Software Engineer (Java/React) to join our team.

In this role, you will work with one of our longest-standing clients in the real estate industry. If you are looking for long-term stability and continuous growth, this is an excellent opportunity to build a secure and rewarding career.

If you thrive in highly technical environments, love deep-dive system design, and pride yourself on delivering robust, high-quality code within high-performing teams, this is the challenge you've been looking for.

About First Factory We are a software development company with over two decades of experience, boasting a dynamic team of 175+ professionals actively engaged in diverse projects across various industries. We invite you to join us on this journey as we continue to thrive and embrace fresh challenges.

Key Responsibilities

• Take full accountability for the end-to-end lifecycle of a singular, high-impact project within the real estate tech space.
• Solve multi-layered logical puzzles and optimize code for both time and space complexity to ensure maximum performance.
• Collaborate through complex architecture design under tight timelines, designing and implementing modern Microservices architectures and RESTful APIs.
• Participate in rigorous deep-dive code reviews, using them as a collaborative opportunity to ensure high engineering standards and share knowledge.
• Articulate complex technical ideas, rationale, and architectural trade-offs clearly to both technical and non-technical stakeholders.

Requirements

• Strong, production-level experience with Java (8+) and the Spring Framework ecosystem.
• Hands-on experience building robust, highly responsive UIs with React and modern JavaScript (ES6+).
• Mastery of data structures, algorithmic complexity (Big-O notation), runtime optimization, and high-level system design patterns.
• Experience collaborating in high-performing, fast-paced Agile teams.
• Advanced English fluency.

Nice to Have

• Experience with CI/CD pipelines and cloud infrastructure (AWS, Azure, or GCP).
• A strong portfolio of competitive programming, HackerRank/LeetCode success, or complex open-source contributions.

For over 25 years, First Factory has been a place where collaborative excellence meets modern technologies. We’re a strong team building exceptional software solutions from Costa Rica and LATAM for primarily US-based clients. With industry-low turnover, top eNPS globally, and 5 consecutive Inc. 5000 awards, we foster an environment where talented engineers thrive on challenging projects using modern tech stacks.