About Lang Chain

At Lang Chain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale.

Today, Lang Chain, Lang Graph, Lang Smith, and Agent Builder are used by teams shipping real AI products across startups and large enterprises. Millions of developers trust Lang Chain to power AI teams at companies like Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.

With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. Lang Chain is a place where your contributions can shape how this technology shows up in the real world.

About the role Location: London, UK

• Work closely with companies on the frontier of LLM-applications, bringing ideas to production-ready apps

• Collaborate on a wide variety of LLM-apps from concierge search, codegen, agentic co-pilots and more

• Give technical demos the entire suite of Lang Chain's products

• Lead trainings and workshops on best practices, targeted at developer audiences

• Collaborate closely with the enterprise sales team to win deals

• Collaborate closely with engineering, helping translate customer insights and feedback into product improvements

• Lead internally- and externally-facing, special projects that dogfood our new products

How to be successful in this role

• Engineers who love working with customers or are aspiring future founders

• Deployed engineers / solution architects who have experience in the role at developer focused companies.

• You have an engineering background and enjoy being a trusted partner to companies

• You like to find a way to “make it work”. Bent towards action and service orientation.

• You enjoy keeping up to date on the latest industry techniques

• You’re comfortable presenting best practices to bigger teams

• Bonus if familiar with Lang Chain or building with LLMs

• Can thrive in a fast moving environment. Views unstructured environments as an opportunity to figure out the most impactful work and define the future success of the company. Startup experience is a bonus.

• Ownership minded

• Minimum experience of 3+ years in a similar technical role: software engineering, customer engineering

Compensation & Benefits

• We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. Benefits include things like medical, dental, and vision coverage, flexible vacation, a 401(k) plan, and life insurance. Actual compensation and offerings will vary based on role, level, and location. Team members in the EU, UK, and APAC receive locally competitive benefits aligned with regional norms and regulations.