TimeZest: Senior Software Engineer (Rails/LLMs)
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Headquarters: Remote
URL: TimeZest - Automated Scheduling Solution Designed Specifically for MSPs
TimeZest makes it easy for end users to schedule appointments with IT service providers. Since launching in 2019, TimeZest has grown rapidly and is now a critical piece of software used by over 1,000 businesses.
We’ve been a remote-only company from day one, with 22 great people spread across Europe, Asia, and the United States. We maintain a relaxed working environment, using just enough process to stay efficient. We’re bootstrapped, profitable, and focused on building software our customers love.
As we expand into AI-powered features, we’re hiring a Senior Software Engineer to lead our integration of large language models (LLMs) into our platform. You’ll design and build the core backend systems that power intelligent ticket categorization, document indexing, vector search, and prompt orchestration—while helping upskill the rest of the team in this emerging space.
You’ll bring both strong Rails experience and LLM expertise, helping us build a scalable, production-grade foundation for new AI-driven capabilities.
Ruby on Rails 7, PostgreSQL, Sidekiq, TypeScript and React, all running on Heroku.
This is a permanent, full-time position with a salary paid monthly. It is a remote position, and you can be based anywhere in the world, if you have 2-3 hours of overlap with the engineering team.
We’re looking forward to hearing from you!
To apply: Remote Senior Software Engineer (Rails/LLMs) at TimeZest
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Why are you the right fit for this role - TimeZest: Senior Software Engineer (Rails/LLMs) ?
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Bringing you latest Remote Jobs - TimeZest: Senior Software Engineer (Rails/LLMs)
Headquarters: Remote
URL: TimeZest - Automated Scheduling Solution Designed Specifically for MSPs
Company
TimeZest makes it easy for end users to schedule appointments with IT service providers. Since launching in 2019, TimeZest has grown rapidly and is now a critical piece of software used by over 1,000 businesses.
We’ve been a remote-only company from day one, with 22 great people spread across Europe, Asia, and the United States. We maintain a relaxed working environment, using just enough process to stay efficient. We’re bootstrapped, profitable, and focused on building software our customers love.
Role overview
As we expand into AI-powered features, we’re hiring a Senior Software Engineer to lead our integration of large language models (LLMs) into our platform. You’ll design and build the core backend systems that power intelligent ticket categorization, document indexing, vector search, and prompt orchestration—while helping upskill the rest of the team in this emerging space.
You’ll bring both strong Rails experience and LLM expertise, helping us build a scalable, production-grade foundation for new AI-driven capabilities.
What you’ll do
Design and build scalable backend services for LLM workflows—vector embedding, retrieval pipelines, and LLM API integration
Build data pipelines to process, index, and embed ticket content, documents, and structured data
Lead architecture decisions related to LLM orchestration, prompt engineering, context management, and API reliability
Collaborate cross-functionally with product, engineering, and design to take ideas from prototype to production
Drive backend best practices—including code quality, test coverage, observability, and performance
Mentor and guide junior and mid-level engineers through code reviews, system design sessions, and hands-on pairing
What we’re looking for
7+ years of professional software development, including 5+ years in backend roles
3+ years of recent production experience with Ruby on Rails
Strong knowledge of relational databases (PostgreSQL), data modelling, indexing, caching, and performance tuning
Track record of designing secure, scalable, observable backend systems and architectures
Hands-on experience integrating LLM APIs (e.g., OpenAI, Anthropic) into production software. Bonus if within Rails applications.
Excellent system-design skills for search & retrieval workloads, scalable services, and robust data pipelines
Excellent communication skills and the ability to mentor others in a collaborative, fully remote team
Our Stack
Ruby on Rails 7, PostgreSQL, Sidekiq, TypeScript and React, all running on Heroku.
Nice to Have
Frontend experience with TypeScript & React
Previous experience with AI/ML-focused data pipelines in other environments and languages
Experience deploying or self-hosting open-source LLMs (e.g., Mistral, LLaMA) using modern inference frameworks
Previous experience working in a remote role.
What we offer
Competitive salary with equity options
Full remote role, open worldwide providing there is some overlap with engineering team
New company issued machine
Annual company and team trips to gather and get to know each other better
Flexible hours, home-office stipend, annual learning allowance
Full licences to your favourite coding agent tool (Cursor, Copilot etc)
This is a permanent, full-time position with a salary paid monthly. It is a remote position, and you can be based anywhere in the world, if you have 2-3 hours of overlap with the engineering team.
We’re looking forward to hearing from you!
To apply: Remote Senior Software Engineer (Rails/LLMs) at TimeZest
Continue reading...
Will you be applying?
Why are you the right fit for this role - TimeZest: Senior Software Engineer (Rails/LLMs) ?
Why should we hire you?