Senior Software Engineer - Platform
Location: Remote
About Monoline
Monoline is redefining the standalone personal umbrella insurance market with an unwavering focus on underwriting excellence, disciplined risk selection, and long-term profitability. Founded by proven entrepreneurs with a track record of successful ventures, Monoline is built on the principles of curiosity, innovation, and customer-centric solutions.
We believe in challenging the status quo, bringing fresh perspectives to a traditional industry, and designing intuitive, straightforward, and consistent products. Our philosophy is rooted in empathy – understanding customer needs to create truly helpful solutions. We lead with gratitude, valuing every detail and the relationships we build along the way.
Our core values guide everything we do:
People First – We build meaningful relationships, treating our team, partners, and customers with respect and care.
Positive Presence – We bring energy and optimism to every challenge, fostering a supportive and motivated team culture.
Batteries Included – We take initiative, think independently, and execute at a high level without waiting for direction.
Always Curious – We seek knowledge, challenge assumptions, and continuously refine our approach to be the best at what we do.
About the role
We are seeking a talented and experienced Full Stack Software Engineer to join our remote team. In this role, you will play a pivotal part in developing and enhancing our platform, working closely with a team of dedicated professionals committed to delivering exceptional user experiences.
Key Responsibilities
Design and develop Ruby on Rails applications that power our quoting and pricing system, and our underwriting risk assessment platform, with integrated AI capabilities for enhanced decision-making.
Implement prompt engineering strategies and AI workflow orchestration using industry-standard AI evaluation tools like LangFuse and LangSmith to measure model performance and optimize outputs.
Collaborate with cross-functional teams to architect full-stack solutions that integrate AI models, intelligent automation, and traditional backend services within a Rails environment.
Contribute to our platform's core infrastructure, ensuring high performance, scalability, and responsiveness across AI and non-AI systems.
Lead code reviews, testing, and documentation practices that maintain code quality and establish best practices for AI integration in production systems.
Stay at the forefront of emerging AI technologies and evaluation frameworks to continuously enhance our platform's capabilities and underwriting accuracy.
Qualifications
Proven experience as a Senior Software Engineer or similar role with demonstrated expertise in Ruby on Rails development and modern full-stack application architecture.
Experience with PostgreSQL, Redis, and Docker for building scalable systems.
Familiarity with cloud services such as AWS and Render.
Strong understanding of authentication, encryption, and security best practices.
Excellent problem-solving skills, attention to detail, and ability to think architecturally.
Strong communication and collaboration abilities in a remote work environment.
Experience designing and implementing prompt engineering strategies with understanding of how to measure and evaluate AI model outputs.
Hands-on experience orchestrating AI workflows and integrating AI capabilities into Rails applications.
Knowledge of building, configuring, and integrating third-party AI models and APIs into software systems.
Why Monoline
Join a founder-led company built on underwriting discipline and long-term profitability. This is a rare opportunity to shape core platform infrastructure and internal tooling from the ground up with real ownership over technical direction. Work alongside a small, high-impact team that values curiosity, clean engineering, and shipping things that matter. Be part of a company committed to becoming the industry leader in standalone personal umbrella insurance.
What We Offer:
Competitive salary paid in USD.
Annual company performance bonus
Stock options to share in the company's success.
Flexible, fully remote work environment.
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Opportunity to be part of a dynamic, innovative team shaping the future of insurtech through AI-driven innovation.
Apply Now
If you’re passionate about building high-quality software and resilient infrastructure, and want to make a meaningful impact in the insurance industry, we’d love to hear from you. Apply today and become a part of Monoline’s exciting journey.
Senior-level Ruby on Rails and full-stack development experience, with PostgreSQL, Redis, Docker, cloud services, security, prompt engineering, AI workflow orchestration, and AI model integration expertise.
Key Responsibilities
- developing applications
- orchestrating workflows
- integrating models
Skills & Tools
Ruby on Rails, PostgreSQL, Redis, Docker, AWS, Render, LangFuse, LangSmith
Job Details
- Category: Software Development
- Seniority: Senior Level
- Commitment: Full Time
- Workplace: Remote — Brazil
- Salary: USD 50,000 – 80,000 / year
- Languages: English
Benefits
- Retirement plan
About Monoline
An insurtech company providing standalone personal umbrella insurance through AI-driven platforms. — Industry: Finance