Senior Backend Engineer: Machine Learning Infrastructure

Lever, Inc.; Schweiz; Remote; CHF 67.000 - 100.000; Vollzeit

Benefits dieser Stelle

Fully remote

Unlimited vacation

Home-office stipend

Apple laptop

Annual training budget

Maternity/paternity leave

Stock options

Team offsites

Career development opportunities

Zusammenfassung

Lever, Inc. is seeking a Senior Backend Engineer for Machine Learning Infrastructure. You will design and operate high-load backend services and data pipelines that power ML workloads, including LLMs, in a remote-first environment.

You’ll own architectural decisions and collaborate with ML and product teams to deliver scalable, reliable platform capabilities. The role emphasizes ownership, modern tooling, and a strong engineering culture, with opportunities to impact how teams build and operate

Qualifikationen

• 5+ years of backend or platform engineering experience.
• Proficient in Python and building scalable services.
• Experience with cloud platforms (AWS, GCP, Azure) or Kubernetes.
• Strong distributed systems and API design knowledge.
• Experience working with modern AI-assisted development tools is a plus.

Aufgaben

• Design, build, deploy, and operate high-load backend services for ML infrastructure.
• Own ML data pipelines and platform capabilities from design to deployment.
• Collaborate with ML and product teams to translate requirements into services.
• Ensure reliability, observability, and maintainability of systems.
• Drive architectural decisions and trade-offs with a strong ownership mindset.
• Proactively identify problems and take ownership of resolution.
• Leverage AI-assisted tooling while maintaining sound engineering judgment.
• Foster a collaborative culture and help teammates solve technical challenges.

Kenntnisse

Python

Distributed systems

Cloud platforms

Kubernetes

APIs

LLMs/ML infra

Observability

Team collaboration

System design

AI-assisted tooling

Jobbeschreibung

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Backend Engineer: Machine Learning Infrastructure based in Switzerland.

As a Senior Backend Engineer, you’ll help build the infrastructure that enables machine learning teams to develop, deploy, and operate models reliably at scale.
You’ll own critical backend services, data pipelines, and platform capabilities supporting workloads ranging from traditional machine learning to LLMs.
The role combines distributed systems engineering, cloud infrastructure, API development, observability, and platform design.
You’ll work closely with ML and product teams to understand their needs and turn them into reusable, self-service infrastructure.
You’ll have significant autonomy to make technical decisions, evaluate trade-offs, and take solutions from design through continuous improvement.
The environment is remote-first, collaborative, and strongly oriented toward ownership, thoughtful engineering, and modern AI-assisted development.
This is an opportunity to have a direct impact on how teams build and operate machine learning products at scale.

Accountabilities

• Design, build, deploy, and operate high-load distributed backend services and APIs that support machine learning infrastructure.
• Take end-to-end ownership of core ML services and associated data pipelines, from system design and implementation through deployment, observability, maintenance, and continuous improvement.
• Build reliable, scalable, and reusable infrastructure components that make machine learning workloads easier for product and ML teams to run and operate.
• Partner closely with ML and product engineers to understand their requirements and translate them into effective platform capabilities and services.
• Make and communicate technical decisions by evaluating architectural options, trade-offs, scalability, reliability, and operational requirements.
• Maintain a high standard for service reliability, performance, observability, and maintainability.
• Proactively identify technical and operational problems and take ownership of resolving them rather than allowing issues to remain unaddressed.
• Use modern AI-assisted development tools thoughtfully while maintaining strong ownership of system design, engineering decisions, and code quality.
• Contribute to a collaborative engineering culture by sharing knowledge, supporting teammates, and helping others solve technical challenges.

Requirements

• 5+ years of professional experience in backend engineering, platform engineering, or a closely related discipline.
• Extensive professional experience with Python, the primary programming language used in the environment.
• Hands-on experience developing and operating software on a public cloud platform such as AWS, GCP, or Azure, or working with self-managed Kubernetes; experience with AWS is particularly relevant.
• Strong experience designing and building distributed, high-load services and APIs.
• Solid understanding of data structures, algorithms, and the trade-offs involved in selecting and implementing them.
• Strong system-design mindset, with the ability to design solutions before implementation and understand the architectural implications of technical decisions.
• Experience working effectively with modern AI-assisted coding and development tools, combined with the judgment to understand their appropriate use and limitations.
• High level of ownership, initiative, and accountability, with a proactive approach to identifying and solving problems.
• Strong communication and collaboration skills, with a friendly and supportive approach to working with teammates and cross-functional partners.
• Experience with Rust, C, C++, or Go is a strong advantage.
• Previous experience developing or contributing to ML platforms or machine learning infrastructure is highly valued.
• Experience setting up and operating vector databases such as Qdrant, Milvus, Weaviate, OpenSearch, or pgvector is a plus.
• Experience with model serving or inference infrastructure, including LLM workloads, is advantageous.
• Experience with Infrastructure as Code tools such as Terraform is a plus.

Benefits

• Fully remote working environment, allowing you to choose where you live.
• Unlimited vacation time, with employees strongly encouraged to take at least three weeks of vacation each year.
• Home-office stipend to help you create a productive and comfortable remote workspace.
• Apple laptop provided for new employees.
• Annual training and professional development budget.
• Maternity and paternity leave for eligible employees.
• Competitive base salary of $80,000–$120,000 USD, depending on knowledge, skills, experience, and interview results.
• Stock options offered in addition to the base salary.
• Regular team offsites providing opportunities for collaboration and connection.
• Opportunity to work with experienced colleagues and contribute to meaningful, technically challenging projects.