This is a highly specialized role sitting at the intersection of model behaviour and product quality. You'll be the expert on how Claude behaves inside Claude Code, owning and maintaining the system prompts that ship with each new model snapshot. When a new model drops, you're the person making sure Claude Code feels right within days , not weeks.

You'll work closely with Model Quality and Research to understand emergent behaviours and behavioural regressions, and with product and safeguards teams to respond quickly when something goes wrong.

This role requires someone who can move fast on behavioural tuning while maintaining rigor, and who cares deeply about the end-to-end developer experience Claude Code delivers. You'll need strong prompting skills, excellent judgment about model behaviours, and the collaborative skills to work across product, safeguards, and research teams.

Responsibilities:

• Own Claude Code's system prompts for each new model snapshot, ensuring behaviours feel consistent and well-tuned
• Review production prompt changes and serve as a resource for particularly challenging prompting problems involving alignment and reputational risks
• Lead incident response for behavioural and policy concerns, coordinating with product and safeguards teams
• Scale prompting and evaluation best practices across claude code and product teams.
• Deliver product evaluations focused on model behaviours
• Define and streamline processes for rolling out prompt changes, including launch criteria and review practices
• Create model-specific prompt guides that document quirks and optimal prompting strategies for each release
• Collaborate with product teams to translate feature requirements into effective prompts

You may be a good fit if you:

• Are a power user of agentic coding tools and have strong intuition about model capabilities and limitations
• Thrive in high-intensity environments with fast iteration cycles
• Take full ownership of problems and drive them to completion independently
• Are skilled at creating and maintaining behavioural evaluations
• Have strong technical understanding, including comprehension of agent scaffold architectures and model training processes
• Are an experienced coder comfortable working in Python and Typescript
• Have independently driven changes through production systems with strong execution and responsiveness
• Have experience translating user feedback and product needs into coherent prompts and behavioural specifications
• Excel at working across organisational boundaries, collaborating effectively with teams that have differing goals and perspectives
• Have experience translating user feedback and behavioural observations into coherent prompt changes and specifications
• Care deeply about AI safety and making Claude a healthy alternative in the AI landscape

Annual compensation range for this role is $300,000-$405,000 USD.

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This position is needed to lead relationships with our largest current Communications platform customers who consume our messaging, voice and email services. You will be directly responsible for protecting and growing Twilio's communications business across your assigned customers, specifically in NEA.

As a Strategic Account Executive, you will drive highly analytical and consultative sales cycles with customers that are running large scale, global, competitively sourced, compliance-heavy, use case-specific businesses.

Responsibilities:

• Manage and expand some of our most important customer accounts, including high growth technology, logistics, and fintech companies.

• Develop, drive, and execute account strategy to consistently deliver strong revenue, gross margin, and gross profit results.

• Partner closely with other Twilio teams to identify new revenue opportunities within your account portfolio.

• Serve on a cross-functional account team with representatives from product, finance, support, and services teams.

• Run a disciplined forecast, consistently achieve goals, and present guidance to executive management.

• Run highly consultative sales cycles with our largest customers with a focus on deep discovery, listening to customer needs and being an effective champion for their point of view in the organization

Qualifications:

• More than 12+ years of combined experience in major account or strategic sales, managing or leading quantitative, highly analytical products and solutions for customers.

• Accountable for relationship management, cross sells, upsells and solutions consulting.

• Comfortable working with business and highly technical leaders, while influencing their understanding and building supportive partnerships.

• Analytical account development strategy based on using data to find opportunities and prove value.

• Demonstrated track record of managing business forecasts and financial models.

• Entrepreneurial mindset with appetite to define processes and build programs.

• Proven track record of developing, growing and delivering revenue & gross profit results, especially for large-scale and enterprise customers in Asia.

• Excellent verbal and written communication skills.

• Bachelor’s Degree or equivalent years of experience.

Desired:

• Cross selling experience to Marketing, Engineering and Product.

• Telco, CPaas or PaaS selling experience.

Travel:

We prioritize connection and opportunities to build relationships with our customers and each other. For this role, approximately 30% travel is anticipated to help you connect in-person in a meaningful way.

What We Offer:

Working at Twilio offers many benefits, including competitive pay, generous time off, ample parental and wellness leave, healthcare, a retirement savings program, and much more. Offerings vary by location.

Twilio thinks big. Do you? We like to solve problems, take initiative, pitch in when needed, and are always up for trying new things. That's why we seek out colleagues who embody our values , something we call Twilio Magic. Additionally, we empower employees to build positive change in their communities by supporting their volunteering and donation efforts. So, if you're ready to unleash your full potential, do your best work, and be the best version of yourself, apply now!

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What you need

• ITIL (Problem, Incident, Change Management) Knowledge.
• Bachelor in Computer Science/Info Technology Mgmt (preferred)

Why this matters

This role is critical to the success of our client’s Production environment, and the successful candidate will have the opportunity to make a significant impact on the team’s performance and overall success.

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