Remote opportunity at
XplorSenior Full Stack Engineer
Xplor seeks a Senior Full Stack Engineer to join its AI Engineering division. The employer builds vertical software, embedded payments, and artificial intelligence solutions for industries…
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About This Role
Xplor seeks a Senior Full Stack Engineer to join its AI Engineering division. The employer builds vertical software, embedded payments, and artificial intelligence solutions for industries such as fitness, golf and club, recreation, field services, laundry, and education. In this remote position, you will develop the shared platform powering artificial intelligence across a portfolio of products utilized by over 130,000 businesses. You will work across the entire stack—ranging from agent…
Job Description
Xplor seeks a Senior Full Stack Engineer to join its AI Engineering division. The employer builds vertical software, embedded payments, and artificial intelligence solutions for industries such as fitness, golf and club, recreation, field services, laundry, and education. In this remote position, you will develop the shared platform powering artificial intelligence across a portfolio of products utilized by over 130,000 businesses. You will work across the entire stack—ranging from agent runtimes, application programming interfaces, and retrieval mechanisms to user-facing interfaces—collaborating closely with product teams to move artificial intelligence features safely and quickly into production.
This role suits an experienced engineer who enjoys tackling challenging problems at scale, including tenant isolation, streaming responses, and performance optimization. Your daily workflow will involve AI-native engineering practices, such as utilizing coding agents and spec-driven development. Responsibilities span building reliable agent workflows, improving document and data retrieval, ensuring data safety and audit trails, monitoring cost and latency, writing design documents, and mentoring other engineers. You will also share on-call responsibilities for the services you create with support from Site Reliability Engineers. Candidates must be legally authorized to work in the country without sponsorship.
Responsibilities
- Build reliable agent workflows combining models, retrieval, tools, and human approval
- Improve document and business data ingestion and retrieval processes
- Measure answer quality using automated offline and online evaluations
- Protect customer data through tenant isolation, permissions, and prompt-injection defenses
- Develop reusable user interface components, software development kits, and integrations
- Design trustworthy agent interfaces with streaming responses and accessibility features
- Track cost, latency, and quality while tracing agent runs end-to-end
- Collaborate with product teams to transition early ideas into shipped features
- Lead technical design for major platform features and write design documents
- Mentor engineers across AI Engineering and product teams
- Share on-call duties for built services
Requirements
- Six or more years of experience building and shipping production software with recent senior-level experience
- Strong Python backend experience utilizing FastAPI, Pydantic, and async services
- Solid TypeScript and React skills with experience building reusable components or software development kits
- Hands-on experience building with large language models in production, such as tool calling, retrieval-augmented generation, or agent workflows
- Experience with retrieval and search tools, vector databases, hybrid search, chunking, or reranking
- Working knowledge of PostgreSQL, data modeling, performance, and migrations
- Experience building multi-tenant SaaS with a focus on data security, permissions, and personal information handling
- Comfort running services on Amazon Web Services using infrastructure as code, continuous integration and deployment, and monitoring tools
- Experience leading technical design and writing clear design documents
- Legal authorization to work in the country without visa sponsorship
Qualifications
- Experience building multi-agent systems, long-running background jobs, or human-in-the-loop approval flows
- Familiarity with Model Context Protocol, LiteLLM, or Amazon Bedrock
- Experience building automated evaluations for large language model or retrieval-augmented generation systems
- Background in prompt-injection defenses or artificial intelligence security
- Experience creating streaming user interfaces or accessible artificial intelligence interfaces
- Previous work in regulated environments such as SOC 2 or PCI DSS
Core Skills
Benefits
- Paid Parental Leave benefit programs
- Three extra days off to volunteer and give back to the local community
- Access to a Global Mentorship Program and Diversity and Inclusion initiatives
- Access to free mental health support
- Flexible working arrangements
Frequently Asked Questions
Answers are based only on the employer’s listing; where it doesn’t say, neither do we.
What is the salary for the Senior Full Stack Engineer role?
The annual base salary range for this position is $180,000 to $200,000 USD.
Is this position remote?
Yes, this is a fully remote role open to candidates based anywhere in the U.S., excluding Hawaii and Alaska, with a preference for candidates in the Eastern or Central time zones.
Does Xplor offer visa sponsorship for this position?
No, Xplor does not sponsor visas at the time of hire or at any later time, and applicants must be legally authorized to work in the country where the role is advertised.
How should I apply for this job?
Submit your resume through the careers portal or external job boards, and include the word 'moonshot' at the top of your message to the Hiring Manager.
Sample Interview Questions
AI-generated questions tailored to this specific role — a preview of the full practice set.