Senior JavaScript Engineer
Human Capital is a multi-stage venture capital firm that partners with exceptional founders, deploying capital and building high-caliber teams at scale across the world's most critical industries.
About Human Capital
Human Capital is a multi-stage venture capital firm that builds and invests in companies defining the world's most critical industries. The firm partners with founders to assemble exceptional teams, offering talent, investment, legal, compliance, and operational support alongside capital. Its portfolio and clients include notable companies such as Livongo, Snowflake, SpaceX, Anduril, Dandy, The Boring Company, Brex, Neuralink, Cloaked, XAI, Commure, ModRetro, Kalshi, Applied Intuition, Speechify, Transcarent, and Qualia.
Skills
About the Role
You will drive the design, development, and optimization of advanced JavaScript techniques to collect signals such as user behavior, device characteristics, and browser APIs securely and efficiently. You will own the full code lifecycle including architecture, development, deployment, monitoring, and continuous improvement. You will collaborate closely with Product, Research, Security, and Engineering teams to align your technical execution with broader product goals, pushing the boundaries of real-time, client-side and backend development.
Requirements
- 4+ years of hands-on software development experience, with deep expertise in vanilla JavaScript and browser internals
- Strong understanding of web security concepts, browser APIs, and the nuances of cross-platform development
- A JavaScript enthusiast who enjoys being hands-on: reviewing code, setting architecture and contributing to complex solutions
- Experience with typed backend languages (e.g., Go, Java)
- Excellent communication and collaboration skills, with the ability to work effectively across disciplines
- Passionate about performance, security, and crafting elegant technical solutions
- Familiarity with content delivery networks (CDNs) and large-scale deployment strategies
- Background in cybersecurity, bot mitigation, or fraud prevention technologies
Responsibilities
- Drive the design, development, and optimization of advanced JavaScript techniques to collect signals securely and efficiently
- Own the full code lifecycle: architecture, development, deployment, monitoring, and continuous improvement
- Collaborate closely with Product, Research, Security, and Engineering teams to align technical execution with broader product goals
Benefits
- Well-being and learning stipends
- Flexible work options
- Dedicated time off