Join Ontra as a Senior Software Engineer to build AI-powered product features and develop web applications in a collaborative environment.
Posted by employer 19 hours ago
First seen on Joblaze 13 hours ago
Last verified on the company career page 13 hours ago
Skills & Technologies
What you'll build
- Ship AI-powered product features
- Build, implement, and maintain a web-based application
- Take full responsibility for project progress
- Continuously ship and improve code
- Engage with stakeholders to gather insights
Must have
- 5+ years as a full-stack software engineer
- Experience with MVC frameworks
- Daily use of AI coding tools
Nice to have
- Experience building LLM features in production
Practical constraints
- On-site work at New York office three days per week
AI in the day-to-day
Daily use of AI coding tools is required, along with the ability to review, verify, and reject AI output.
Requirements
- Experience
- 5+ years
Not disclosed in this posting: compensation, visa sponsorship.
Benefits
Joblaze summary
In this role, the Senior Software Engineer at Ontra focuses on designing and developing AI-powered product features while collaborating with cross-functional teams. Proficiency in Ruby on Rails and React is essential, along with a strong background in AI and LLMs, as the engineer will leverage these technologies to enhance user experiences. This position is ideal for someone with over five years of full-stack experience who thrives in independent work and iterative development. Ontra fosters a culture of ownership and collaboration, making it a fitting environment for self-motivated innovators.
Joblaze insights
- Listed today — first seen on Joblaze October 29, 2026. Last confirmed on Ontra's careers page October 29, 2026.
- React appears in 69% of 226 comparable senior fullstack roles in United States; Ruby on Rails appears in 4.4% of 226 comparable senior fullstack roles in United States.
Quick facts
- Is the Senior Software Engineer role remote?
- It's hybrid — Ontra expects some on-site time in New York, New York, United States.
- How much experience is required?
- At least 5 years of relevant experience for this Senior Software Engineer role.
- Where is the role based?
- Ontra is hiring for this position in New York, New York, United States.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: AI/ML, React, Ruby on Rails.
- What seniority level is this role?
- Ontra targets senior candidates for this position.
- Is this full-time or contract?
- Full-time for this Senior Software Engineer role at Ontra.
From the original posting
For this job, we are currently only hiring candidates based in New York and require on-site work at our New York office three days per week. For more information on where we employ, please see below.
About the Role
Ontra is seeking a Senior Software Engineer reporting to one of our Engineering Managers.
We’re looking for someone excited to design innovative prototypes, develop intuitive user experiences, and collaborate with cross-functional teams. We're looking for someone who thrives in ambiguity: you can take a loosely defined problem, figure out the right approach, make smart trade-offs, and ship something that works well for users and the business. You’ll have practical experience with AI and LLMs, both as tools in your own workflow and in building product features.
If you are an independent, self-motivated innovator with a sense of ownership, someone who thrives in developing iterative solutions and can work either solo or collaboratively with one other engineer to deliver continuous improvements, we’d love to get to know you!
What You’ll Do
Build with AI: Ship AI-powered product features and use AI tools across your own workflow, from prototyping to code review.
Develop and Scale: Build, implement, and maintain a web-based application from the frontend to the backend using Ruby on Rails and React.
Ownership and Accountability: Take full responsibility for the progress and success of the project, driving key decisions and problem-solving independently or with minimal guidance.
Iterative Improvement: Continuously ship and improve code by seeking stakeholder feedback, responding effectively to suggestions, and implementing changes rapidly.
Stakeholder Engagement: Actively engage with stakeholders to understand their needs, gather insights, and incorporate feedback into the product development process.
Collaboration: Work closely with cross-functional teammates to align on development strategies, ensuring seamless integration of ideas and efforts in building the prototype.
What You’ll Bring
Experience: 5+ years as a full-stack software engineer working with MVC frameworks (e.g., Ruby on Rails, Python with Flask, Java with Spring).
AI Fluency: Daily use of AI coding tools is required, along with the ability to review, verify, and reject AI output and to know when not to trust it. Preferred depth includes having built LLM features in production (RAG, agents, prompting, evals).
Project Development: Demonstrated history of successfully building projects from inception to completion.
Independence: Capable of working solo or with one other engineer, showcasing a strong sense of ownership and accountability for the project.
Iterative Approach: Skilled in developing iteratively, incorporating stakeholder feedback to refine and improve the product continuously.
APAC
Hong Kong
EMEA
United Kingdom
Benefits Snapshot
Twice yearly team offsites for in-person collaboration
Paid flexible time off policy
Paid parental leave and benefits
Employer-supported retirement contributions, varying by country
Monthly phone and internet reimbursement
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