Who are we
At Lokalise, we make it easy and profitable for businesses to expand into new markets. Founded in 2017, our AI-powered translation and localization platform automates workflows, integrates with over 60 tools, and helps product teams launch multilingual products 10x faster and at 80% lower cost. Trusted by thousands of businesses across over 100 countries, Lokalise is empowering more than 25 million people worldwide to use diverse services in their native languages. Backed by a customer-loved support team, our platform seamlessly fits into your design and development processes, helping you scale effortlessly.
While our company operates exclusively on a remote basis, you must reside and have the legal right to work in one of the following countries: the United Kingdom, Latvia, Spain, Germany, Denmark, Poland, Portugal, or Ireland.
This is a full-time, remote position. We do not offer B2B or contractor arrangements.
About
We’re looking for a Senior Machine Learning Engineer to join our growing AI team. You’ll be the technical owner of the systems that power LLM-based localization features — designing reliable, scalable, and observable services from the ground up. You’ll also partner across disciplines to support ML operations and data infrastructure — enabling experimentation and continuous improvement.
This is a role for someone who thrives in complex systems, has a drive for engineering excellence, and enjoys supporting others to succeed.
You will- Build and own LLM-powered back end services using FastAPI, Pydantic, etc. — ensuring they are scalable, observable, and easy to extend
- Design infrastructure that enables rapid experimentation with LLMs, including A/B testing, feature flagging, and usage analytics
- Integrate and maintain LLM observability tooling (e.g., LiteLLM, Langfuse) to monitor quality, cost, and performance of model calls
- Collaborate with Data and ML Scientists to productionize workflows, share feedback, and continuously improve experimentation speed
- Ensure systems are reliable and deployable with strong CI/CD practices, including instrumentation and alerting
- Contribute to team culture through pairing, mentoring, and sharing learnings to help others grow
- Stay connected to the product by understanding our users' needs, localization workflows, and broader industry trends
You Must Have
- 4+ years of experience building and operating backend systems in production
- Strong proficiency with Python, FastAPI, and Pydantic
- Solid understanding of microservice architecture, scalable distributed systems, and observability, with familiarity using tools like OpenTelemetry, Grafana, or Datadog to monitor both general system health and LLM-specific metrics like latency, token usage, and model performance
- Hands-on experience with prompt engineering in production
- Familiarity with CI/CD, containerisation, and cloud deployment
- Strong sense of ownership
(These are not required but will help you hit the ground running.)
- Experience with LangGraph, multi-modal LLMs and familiarity with tools for LLM integration and observability (e.g. LiteLLM, Langfuse, PromptLayer, or WhyLabs)
- Experience with Lightdash, Snowflake, or modern BI tooling
- Working knowledge of TypeScript, particularly for building or maintaining back end services (e.g., Node.js or serverless APIs)
- Understanding of translation quality metrics (BLEU, chrF, COMET, MQM, METEOR)
- Previous experience with MLOps principles and tooling (e.g. MLflow, Kedro) and/or ML platforms (e.g. SageMaker, Vertex AI)
Our Benefits
- Competitive salary and employee stock options plan
- Fully remote and flexible working hours
- Co-working budget
- Flexible vacation policy
- Equipment budget to set up your home office
- Learning & Development program
- Health insurance
- Wellness benefits
- Great startup atmosphere, team spirit, and team events
We are committed to a culture of inclusion and equal opportunities. Therefore, we welcome applications from people of all gender identities, sexual orientations, personal expressions, relationship, marital, or civil partnership statuses, racial identities, national or ethnic origins, religious beliefs, ages, and disability statuses.
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What We Do
We work towards a world without language barriers ? Lokalise is the category leader for localization. We own the category, and we redefined it as well. We effectively changed the way teams decide and execute localization. Lokalise is the number one choice for any organization going global, and we are also a localization thought leader, pushing for education and quality in all localization aspects. With us, customers reach a whole new audience of app users, online shoppers, web browsers, and game players by providing local experiences, in their language, no matter where in the world they are. Lokalise is not bound to specific personas. We address the needs of developers, product designers, product managers, go-to-market functions, and even internal resources localization. Our product provides a holistic journey to all localization aspects in a flexible all-in-one solution be it software localization, interpreting, document translation, machine translation, localized pricing, copywriting, local legal adjustments, and literally anything localization-related.
Why Work With Us
Our team operates like a professional sports team. We are not ninjas, rockstars, superheroes, or other solitary spotlight seekers. We are team players who excel at our roles and who challenge each other to accomplish more together than any ninja could on their own. We continuously support each other and live up to our five Lokalise values.
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