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LLM Application Engineer

bjakcareerSwitzerlandActAI Engineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Experience
Mid
Posted
28 Sept 2026
Status
Open · checked 7d ago

About this role

This position suits a software engineer with strong fundamentals who wants to build proactive applications and intelligence layers for AI-native user experiences in Switzerland. The LLM Application Engineer role at bjakcareer involves designing agent workflows, improving model behavior, and integrating models with various tools to achieve high reliability in long-running workflows.

Role Overview

ActAI seeks an LLM Application Engineer located in Switzerland to develop the intelligence layer powering upcoming AI experiences. The professional in this position will take charge of problems from start to finish, which includes analyzing user requirements, constructing agentic workflows, connecting models with external services, and maintaining evaluation systems for production environments.

Key Responsibilities

Construct and deliver applications powered by large language models alongside autonomous agent workflows.
Create architectures for reasoning, memory systems, planning, tool usage, and execution across multiple steps.
Construct orchestration pipelines that convert probabilistic outputs from models into safe, predictable, and observable actions.
Connect language models with APIs, search functions, internal services, databases, and external tools.
Implement prompt design, context engineering, tool-calling methods, and structured outputs to enhance model conduct.
Establish evaluation frameworks and datasets for tracking AI quality, reliability, and regression metrics.
Troubleshoot artificial intelligence systems throughout the complete stack, covering model outputs, user interface, orchestration, and backend services.
Refine AI architectures to balance quality metrics against latency and operational costs.
Collaborate alongside product and engineering departments to transform unclear product challenges into functional AI implementations.
Implement production standards focused on tracing, observability, testing, and systematic improvement.

Requirements

Possess solid software engineering foundations together with practical background in creating AI-driven applications.
Demonstrate direct experience working with generative AI, large language models, or agent-based setups.
Show previous involvement in crafting prompts, evaluation processes, workflows, or model behaviors.
Capable of producing clean code meeting production standards.
Adaptable at navigating across various abstraction layers ranging from models to systems and products.
Exhibit strong analytical abilities suited for fast-paced and ambiguous conditions.
Maintain a strong focus toward releasing products, iterating quickly, and driving continuous enhancement.

Skills and Tools

Python
OpenAI-compatible APIs and open-weight models
Agent frameworks and orchestration systems
Vector databases and retrieval systems
Backend services, APIs, and distributed systems
PyTorch and JAX

About the Company

ActAI builds proactive applications intended to replace basic tools like email, notes, tasks, calendar, and scheduling for users worldwide who prefer avoiding complex prompting. The organization focuses on introducing intelligence into daily conversations, errands, and organizational workflows with minimal user prompting. Their product strategy centers on achieving persistent context, real-world task execution, and high reliability for long-running workflows to reduce hallucinations and help users focus on valuable activities.

How to Apply

Interested candidates should apply directly on the official company careers page.

Skills and tech stack

PythonOpenAI-compatible APIsopen-weight modelsAgent frameworksVector databasesRetrieval systemsBackend servicesDistributed systemsPyTorchJAXLLMLLMsGenerative AIDistributed Systems

Questions candidates ask

Where is the LLM Application Engineer position located?

The position is located in Switzerland.

What technologies and frameworks are expected in the tech stack?

The tech stack includes Python, OpenAI-compatible APIs, open-weight models, agent frameworks, vector databases, retrieval systems, backend services, distributed systems, PyTorch, and JAX.

What are the main duties concerning model behavior and workflows?

Responsibilities include building agent workflows, designing systems for reasoning and memory, creating reliable orchestration pipelines, developing prompts and structured outputs, and building evaluation frameworks.

What is the mission of ActAI?

ActAI builds proactive applications to bring intelligence to conversations, errands, organizing, and workflows with minimal or no prompting, aiming to help users spend time on meaningful things.

How should an interested candidate apply for this role?

Candidates should apply directly on the official company careers page.

Ready to apply?

The application is on the official bjakcareer careers page.

Apply on company site