Software Engineer Jobs at LangChain with Visa Sponsorship
Software Engineer jobs at LangChain sit at the intersection of open-source infrastructure and production-grade AI systems, as the company builds the tooling that powers AI applications. The company has an established track record of sponsoring work visas for engineering talent, making it a realistic target for international candidates.
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Get Access To All JobsAbout Us
At LangChain, 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.
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. LangChain is a place where your contributions can shape how this technology shows up in the real world.
Today, LangChain, LangGraph, LangSmith, and Fleet are used by teams shipping real AI products across startups and large enterprises. Millions of developers trust LangChain to power AI teams at companies like Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.
About the Team
The LangSmith team owns and builds LangChain's core platform for observability, evaluation, and production reliability of AI systems. From tracing and annotation to run rules, evaluations, and beyond, they own this end-to-end. If you want to help define what great AI observability looks like at production scale, this is where that work gets done.
About the Role
We're looking for a Principal/Lead level Software Engineer to join the LangSmith team and help drive the technical direction of the platform. You'll build across the full stack from backend services and APIs to frontend product surfaces, and you'll play a central role in shaping how we build: setting engineering standards, mentoring engineers across the team, and making architectural decisions that hold up as we scale. If you're energized by both hands-on engineering and the multiplier effect of leveling up those around you, this role is built for that.
Location: This role can be based in our Boston, San Francisco, or NYC office.
What You'll Do
Drive Technical Direction
- Lead architectural decisions across our Go, Python, and TypeScript stack, ensuring systems are performant, maintainable, and built to scale
- Work across the full stack, owning features end-to-end from backend services and APIs through to frontend product experiences
- Drive tracing, monitoring, and evaluation workflows at scale, with a focus on reliability and query performance across high-volume data
- Help shape the product roadmap by partnering closely with product and design — not just executing on it
Raise the Bar for the Team
- Set engineering standards for the team: define patterns, lead code reviews, and establish the foundations others build on
- Mentor and grow engineers at all levels through code review, design feedback, pairing, and ongoing technical guidance
- Drive projects from ambiguity to delivery while maintaining high engineering standards and aggressive timelines
Own Reliability and Quality
- Troubleshoot and resolve production issues with a root-cause mindset, and implement durable fixes
- Ensure system reliability through strong testing, monitoring, and alerting practices
- Create and maintain technical documentation, including system design docs and API references
What You'll Bring
- 10+ years of professional experience in backend or fullstack engineering on highly complex, production systems
- Strong programming skills across multiple parts of the stack: backend (Python and/or Go) and frontend (TypeScript, React, or similar)
- Demonstrated experience making and owning architectural decisions, including tradeoffs around data systems, APIs, and service reliability
- Experience with high-throughput or mission-critical systems, and a proven ability to optimize for performance and reliability
- Depth in operationalizing technical work — you've taken systems from prototype to production and kept them running well at scale
- Demonstrated track record of mentoring engineers and raising the technical quality of a team, not just the codebase
- Strong communication skills and comfort operating cross-functionally with product, design, and engineering leadership
- Customer centricity and an ownership mentality — you care how the product lands, not just how the code reads
- You exemplify our operating principles
Nice to Have
- Experience with database systems (Postgres, Redis, ClickHouse) and cloud platforms (AWS, GCP, or Azure)
- Familiarity with observability tooling, evaluation frameworks, or AI/LLM infrastructure
Salary Range: $230,000 - $270,000
Compensation Philosophy:
We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. 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.
Benefits
Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.
About Us
At LangChain, 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.
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. LangChain is a place where your contributions can shape how this technology shows up in the real world.
Today, LangChain, LangGraph, LangSmith, and Fleet are used by teams shipping real AI products across startups and large enterprises. Millions of developers trust LangChain to power AI teams at companies like Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.
About the Team
The LangSmith team owns and builds LangChain's core platform for observability, evaluation, and production reliability of AI systems. From tracing and annotation to run rules, evaluations, and beyond, they own this end-to-end. If you want to help define what great AI observability looks like at production scale, this is where that work gets done.
About the Role
We're looking for a Principal/Lead level Software Engineer to join the LangSmith team and help drive the technical direction of the platform. You'll build across the full stack from backend services and APIs to frontend product surfaces, and you'll play a central role in shaping how we build: setting engineering standards, mentoring engineers across the team, and making architectural decisions that hold up as we scale. If you're energized by both hands-on engineering and the multiplier effect of leveling up those around you, this role is built for that.
Location: This role can be based in our Boston, San Francisco, or NYC office.
What You'll Do
Drive Technical Direction
- Lead architectural decisions across our Go, Python, and TypeScript stack, ensuring systems are performant, maintainable, and built to scale
- Work across the full stack, owning features end-to-end from backend services and APIs through to frontend product experiences
- Drive tracing, monitoring, and evaluation workflows at scale, with a focus on reliability and query performance across high-volume data
- Help shape the product roadmap by partnering closely with product and design — not just executing on it
Raise the Bar for the Team
- Set engineering standards for the team: define patterns, lead code reviews, and establish the foundations others build on
- Mentor and grow engineers at all levels through code review, design feedback, pairing, and ongoing technical guidance
- Drive projects from ambiguity to delivery while maintaining high engineering standards and aggressive timelines
Own Reliability and Quality
- Troubleshoot and resolve production issues with a root-cause mindset, and implement durable fixes
- Ensure system reliability through strong testing, monitoring, and alerting practices
- Create and maintain technical documentation, including system design docs and API references
What You'll Bring
- 10+ years of professional experience in backend or fullstack engineering on highly complex, production systems
- Strong programming skills across multiple parts of the stack: backend (Python and/or Go) and frontend (TypeScript, React, or similar)
- Demonstrated experience making and owning architectural decisions, including tradeoffs around data systems, APIs, and service reliability
- Experience with high-throughput or mission-critical systems, and a proven ability to optimize for performance and reliability
- Depth in operationalizing technical work — you've taken systems from prototype to production and kept them running well at scale
- Demonstrated track record of mentoring engineers and raising the technical quality of a team, not just the codebase
- Strong communication skills and comfort operating cross-functionally with product, design, and engineering leadership
- Customer centricity and an ownership mentality — you care how the product lands, not just how the code reads
- You exemplify our operating principles
Nice to Have
- Experience with database systems (Postgres, Redis, ClickHouse) and cloud platforms (AWS, GCP, or Azure)
- Familiarity with observability tooling, evaluation frameworks, or AI/LLM infrastructure
Salary Range: $230,000 - $270,000
Compensation Philosophy:
We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. 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.
Benefits
Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.
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Get Access To All JobsTips for Finding Software Engineer Jobs at LangChain
Align your experience with LangChain's stack
LangChain's engineering work centers on LLM orchestration, retrieval-augmented generation, and developer tooling. Contributions to open-source AI libraries or published work with LangChain or LangGraph signal genuine fit before your resume lands in any applicant tracking system.
Target roles that match your visa category
H-1B and E-3 both require a specialty occupation tied directly to your degree field. Software Engineer roles at an AI infrastructure company satisfy that standard clearly, but your degree discipline needs to align with the specific engineering function in the job description.
Confirm sponsorship intent before final interviews
Ask directly during the recruiter screen whether the role is open to H-1B or E-3 sponsorship. Companies in the Technology and Software sector vary by team and headcount stage, and knowing early prevents wasted time on both sides.
Prepare for LCA timing before your offer closes
Your employer must file a certified Labor Condition Application with the DOL before USCIS can process your H-1B or E-3 petition. LCA certification typically takes seven business days, so factor that into your start-date negotiation once an offer is extended.
Use Migrate Mate to surface active openings
Software Engineer openings at AI-focused companies fill quickly and aren't always posted broadly. Browse LangChain's current visa-sponsoring roles on Migrate Mate, which filters specifically for positions open to international candidates.
Plan your I-94 status carefully if changing jobs
If you're already in the U.S. on an H-1B with another employer, you can begin work at LangChain once USCIS receives the transfer petition, not when it's approved. Filing before your current job ends protects your status under portability rules.
Frequently Asked Questions
Does LangChain sponsor H-1B visas for Software Engineers?
Yes, LangChain sponsors H-1B visas for Software Engineer roles. As an AI infrastructure company operating in a highly specialized technical space, Software Engineer positions at LangChain fit the specialty occupation standard that H-1B requires. Sponsorship is handled through standard employer petition filings with USCIS, including the Labor Condition Application submitted to the DOL before the petition can proceed.
How do I apply for Software Engineer jobs at LangChain?
You can find LangChain's active Software Engineer openings filtered for visa sponsorship on Migrate Mate, which surfaces roles specifically open to international candidates. Once you identify a relevant position, apply directly through LangChain's careers portal. Tailor your application to reflect experience with LLM frameworks, developer tooling, or open-source contributions, as those map closely to how LangChain's engineering teams are structured.
Which visa types does LangChain sponsor for Software Engineer roles?
LangChain sponsors both H-1B and E-3 visas for Software Engineer positions. The H-1B is open to candidates from any country and requires a bachelor's degree or higher in a relevant field such as computer science or software engineering. The E-3 is available exclusively to Australian citizens and follows a similar specialty occupation standard, with no lottery requirement and renewable two-year terms.
What qualifications are expected for Software Engineer roles at LangChain?
LangChain's engineering roles typically require a strong foundation in Python, familiarity with LLM APIs or orchestration frameworks, and experience building or maintaining production systems. Given the company's open-source focus, demonstrated contributions to relevant projects carry significant weight. A bachelor's degree in computer science or a closely related field is generally expected to satisfy the specialty occupation requirement for visa sponsorship purposes.
How do I think about timing when pursuing an H-1B role at LangChain?
If you need a new H-1B cap-subject petition, the annual lottery opens in March for an October 1 start date. Candidates already holding H-1B status from another employer can transfer to LangChain at any point in the year. E-3 holders can also transfer without waiting for a new cap cycle. Building your pipeline with LangChain well before lottery registration in March gives you time to align references, technical assessments, and offer timelines.