Senior Agent Engineer (Langchain)
Senior full-stack engineer at consultancy Focused Labs building production AI-enabled applications for clients using LangChain, LangGraph, LangSmith, and LLMs. Day to day: leading end-to-end delivery across backend and web UIs, pair programming, practicing TDD, mentoring developers, and guiding architecture decisions.
- Compensation
- $120K–$170K / yr
- Location
- United States
- Work setup
- Remote
- Seniority
- Senior
- Employment
- Not specified
- Experience
- Not specified
- Category
- Ai engineering
- Posted
Skills
Must have
- Deep expertise in LangChain, LangGraph, and LangSmith
- Hands-on full stack engineer with a strong track record of delivering software in collaborative, agile environments
- Experience with LangChain or similar agentic frameworks and architecting AI-native systems responsibly
- Experience leading engineering teams and mentoring/mentoring other developers
- Belief in code quality, TDD, and pairing
- Experience across multiple languages or frameworks (e.g., Python, Node, Java, React, Next.js)
- Comfortable translating technical risks and wins for non-technical audiences in client meetings
- Able to travel up to 30% within the United States
Nice to have
- Experience navigating complex organizations and helping teams adopt modern development practices
- Excited about the AI/GenAI space while staying focused on delivering value
Full description
Who we are:
At Focused, we move quickly to deliver quality software that achieves client outcomes and meets their customer’s needs. We strategically partner with our clients to leverage our expertise in design and software, while our clients bring their own domain expertise. We work with a variety of clients from different industries, collaborating as we get new products to market, modernizing legacy systems, or helping teams learn the skills they need to be successful.
Our values:
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Listen first • We are experts in product practices but life long learners in the domain of our customers. We research, collaborate, and understand.
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Learn why • We ask questions and talk to users to understand problem spaces, objectives, and goals, which allows us to deeply invest and drive towards the outcomes of our clients.
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Love your craft • We love diving into a variety of domains and solving problems. We take pride in delivering value, in communicating progress, and guiding our clients to success.
At Focused, our Engineers are both practitioners and experts in their craft. This role would play a crucial role in shaping and implementing engineering best practices and ensuring the successful delivery of complex software projects. With clients, we develop trust and influence - we are unintimidated and unintimidating. With colleagues, we set the standard for how we deliver success for clients.
What would you be doing?
- Build AI-enabled applications leveraging LangChain and LLMs to deliver meaningful, production-ready outcomes for clients.
- Deep expertise in LangChain, LangGraph and LangSmith
- Lead teams through end-to-end delivery across the stack, from backend services to modern web UIs.
- Pair program daily with teammates and clients to share knowledge, improve code quality, and grow together.
- Practice TDD and continuous refactoring to ensure code is reliable, maintainable, and understandable.
- Guide architecture decisions to support scalability, observability, and performance.
- Collaborate closely with designers, product managers, and stakeholders to continuously deliver valuable software.
- Coach developers on the team through pairing, mentoring, and modeling healthy engineering culture.
- Influence technical direction beyond the team, working across client orgs and Focused’s internal practices to share lessons, shape approaches, and raise the collective bar.
- Stay curious through experimenting with new patterns in the GenAI space, share what works (and what doesn’t), and help evolve how we build AI-powered software.