• Own the end-to-end SaaS platform (frontend, backend, database, integrations, deployments) • Lead technical transition from external developers (codebase, architecture, documentation, deployment) • Diagnose and resolve bugs and production issues independently • Align technical decisions with product goals, customer needs, and business priorities • Contribute to roadmap planning and feature prioritisation • Improve system performance, reliability, code quality, and engineering standards • Identify and implement AI-driven and automation opportunities • Strengthen documentation, release processes, and technical resilience • Support internal systems integration (CRM, help desk, automation tools) • Collaborate closely with leadership as technical advisor and execution partner

• Audit and validate the existing codebase, identifying gaps and improvements • Contribute to the rebuild of the backend and support front-end/mobile architecture decisions • Work across a diverse tech stack (Java, Objective-C, Ruby, TypeScript, Python, Kotlin, Swift, etc.), with potential transition to Expo • Implement error monitoring, logging, and notification systems • Support deployment and post-launch performance, including after-hours coverage when required • Collaborate on system design, integrations, and best practices across the stack

Role Description We are hiring a hands-on Full-Stack Developer to help rebuild and scale a mobile app that simplifies city travel. This role spans both front-end and back-end development, with a strong emphasis on system quality, scalability, and post-launch reliability. - Audit and validate the existing codebase, identifying gaps and improvements - Contribute to the rebuild of the backend and support front-end/mobile architecture decisions - Work across a diverse tech stack (Java, Objective-C, Ruby, TypeScript, Python, Kotlin, Swift, etc.), with potential transition to Expo - Implement error monitoring, logging, and notification systems - Support deployment and post-launch performance, including after-hours coverage when required - Collaborate on system design, integrations, and best practices across the stack Qualifications - Proven experience as a Full-Stack Developer with strong back-end capability - Experience refactoring or rebuilding systems for scalability and performance - Understanding of mobile app ecosystems (iOS/Android) - Experience with APIs, databases, and modern architectures - Familiarity with AI development tools (e.g., Claude Code, Cursor) is a plus - Self-starter with strong ownership and decision-making ability Requirements - This is a remote role that will be set up as an independent contractor engagement. - To ensure alignment and transparency, successful candidates will be expected to: - Disclose any existing ongoing roles or client work - If this engagement is uploaded to your LinkedIn profile this should be clearly marked as “Independent Contractor” Benefits - Compensation range: $2,000 AUD - $3,000 AUD / Monthly - Flexibility in managing your time while aligning with AU business hours (approx. 9 AM - 5 PM, Monday to Friday) for collaboration.

Title: Full Stack Software Engineer Location: New York United States Job Description: Constrafor is a SaaS and fintech platform purpose-built for construction. We are setting new standards of productivity and cost-efficiency for the way General Contractors and Subcontractors manage procurement & financial transactions. With over $30 million of VC financing, we are forging the path for construction innovation. Join us on our mission to advance the largest industry in the world. We’re seeking an exceptional Full Stack Engineer to join our dynamic team and lead the development and maintenance of our platform’s core functionality across both frontend and backend systems. In this role, you’ll collaborate closely with the Head of Engineering and Product teams to deliver scalable, high-performing, and intuitive solutions. As a senior member of our team, you’ll take on complex, high-impact projects that require strategic thinking, technical depth, and strong product sensibility. This position offers the opportunity to drive innovation across the organization. If you’re a seasoned engineer with a passion for building seamless, high quality user experiences in a fast-paced startup environment, we’d love to hear from you. What You'll Do: - Lead the design and development of high-quality software across the full stack, ensuring scalability, performance, and maintainability. - Build and optimize user facing applications while seamlessly integrating them with robust backend services. - Collaborate with sales and product teams to prioritize and deliver features that directly impact revenue growth and customer success. - Implement best practices for security, testing, and deployment across both front-end and back-end systems. - Engage with customers and internal stakeholders to understand their needs and translate them into elegant technical solutions. - Share knowledge across the team and contribute to a culture of technical excellence. What You Bring: - 5+ years of experience developing and scaling full stack web applications in a fast-paced environment. - Proficiency in Python, Django, Postgres, and AWS, with solid experience in front-end frameworks such as React or Next.js. - Deep understanding of RESTful APIs, modern web architecture, and front-end performance optimization. - Proven experience building and maintaining complex SaaS products with strong attention to usability and scalability. - Strong leadership and communication skills, with a track record of owning projects from concept to completion. - A passion for mentorship, clean code, and continuous learning. Constrafor Benefits: - Competitive Salary: $180k-205k DOE. - Equity ownership within Constrafor. - Hybrid office schedule (3 days out of our Hudson Yards office) - Medical, dental & vision insurance coverage offered for you and your dependents. - Generous PTO Plan. - A collaborative and innovative work culture that values your input. - Opportunity to make a significant impact in a growing tech company. Constrafor is proud to be an Equal Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state, and local law.