About Us

At Virallens, we are a fast-growing, tech-enabled marketing partner helping businesses grow, scale, and stand out in a noisy world. From intelligent AI systems to creative automation platforms, we build and launch products, campaigns, and services at speed. Our clients span industries, and our ambitions span continents.

We don’t wait for briefs, we build solutions. If you’re someone who thrives in a high-velocity environment, thinks creatively, and can turn language into working intelligence, this is the role for you.

About the Role

We’re looking for a Prompt Engineer to lead the design, development, and optimization of prompts for large language models (LLMs) across a wide range of real-world use cases. This is a role for someone who is deeply fluent in prompting, thrives in experimentation, and can communicate clearly with both technical and business stakeholders.

You’ll work cross-functionally on AI agents, support workflows, and vertical-specific products and will be required to work during U.S. business hours to enable close collaboration with global teams. If you enjoy turning ambiguous goals into powerful prompt structures and deploying them at scale, this is your next playground.

Key Responsibilities

Prompt Strategy & Design

Write, test and refine high-performing prompts across a range of LLM applications
Translate vague business requirements into clear, structured and contextually accurate prompt flows
Architect prompt chains and multi-step agentic workflows

Optimization & Performance

A/B test prompt variants and analyze model outputs for quality, consistency and intent alignment
Maintain a living prompt library with versioning, tagging and detailed documentation
Apply analytical rigor to evaluate prompt effectiveness and improve output quality over time

Cross-Industry Execution

Design prompt systems that work across sectors like legal, finance and marketing
Rapidly adjust tone, structure and input format to meet different domain-specific needs

Collaboration & Communication

Work directly with stakeholders to understand prompt goals and communicate strategy
Act as a bridge between business needs and technical AI prompt delivery

Continuous Learning

Stay current with prompting techniques, LLM releases and AI toolchains
Share insights, failures and successful strategies with the broader team

What We’re Looking For

Experience

2+ years in prompt engineering, NLP, or AI-driven product development
Experience working with LLMs like OpenAI, Anthropic or similar

Must-Haves

Availability and willingness to work in U.S. shift timings (EST/PST)
Deep comfort with prompt engineering and model behavior patterns
Proven ability to build effective prompts across multiple industry domains
Strong verbal and written communication skills, especially for interfacing with non-technical stakeholders

Technical Proficiency

Experience with OpenAI, Anthropic, or Cohere APIs
Familiarity with LangChain, PromptLayer or similar prompt evaluation stacks
Python/scripting(Optional) for quick prompt testing and automation
Git(Optional) for versioning and collaboration

Soft Skills

High ownership, initiative-driven and a natural experimenter
Able to work independently and as part of a fast-paced, agile team
Quick learner with an instinct for iteration and improvement
Brings energy, clarity, and thoughtful communication to every collaboration

Why Join Us?

Creative Control: Lead the entire lifecycle of prompt development
Immediate Impact: See your work go live in real-world applications
Dynamic Projects: Work across multiple verticals with high learning velocity
Lean & Agile: Move fast, test fast, improve fast
High Ownership Culture: Your ideas shape the product direction

Application Instructions

If you’ve designed prompts that make people say “how did you get the AI to do that?”, we want to see them.

Let’s make language your interface to the future.

Virallens

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