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About the Role
HASH is seeking a Tech Lead to architect systems built atop hgres, including the customer-facing frontend, integrations infrastructure, and distributed workflow execution. This player-coach role involves technical ownership, team leadership, and hands-on contribution to design, code, and technical communication.
Responsibilities
- Own and evolve the technical architecture of HASH outside the hGraph core, including the frontend, application services, integrations infrastructure and Flows
- Define clear interfaces between these systems and hGraph, working closely with hGraph's technical owners on cross-cutting decisions
- Design for correctness and resilience across distributed workflows, connector execution, long-running operations, retries, failures and partial state
- Write, maintain and drive alignment around technical specifications, RFCs, architectural decisions and implementation plans
- Review designs and pull requests across TypeScript, Rust and frontend code, improving both immediate implementation quality and the team's shared engineering judgment
- Establish pragmatic engineering standards for testing, reliability, security, observability, operability and maintainability
- Hold regular 1:1s with engineers, provide direct feedback and coaching, support career development and help address performance issues early
- Help engineers break ambiguous initiatives into clear milestones, owners, dependencies and risks, while preserving room for technical judgment
- Remain close to the code: prototype critical paths, establish patterns, debug difficult cross-system failures and contribute directly when doing so unlocks the team
- Improve incident response and operational learning, ensuring failures lead to better systems rather than recurring heroics
- Partner with Product and Design to shape what we build, challenge assumptions and ensure plans reflect genuine technical constraints and opportunities
- Participate in hiring and help build a team with high standards, complementary strengths and clear ownership
Requirements
- Advanced or expert proficiency in both TypeScript and Rust, with experience shipping and operating substantial production systems in each
- Advanced or expert knowledge of distributed systems, including state, consistency, concurrency, messaging, retries, idempotency, fault tolerance and observability
- A track record of owning architecture across a complex product or platform, making good boundaries and trade-offs explicit rather than allowing systems to evolve by accident
- Experience leading engineers through regular 1:1s, candid feedback, coaching and career development
- Excellent written technical communication, including the ability to produce clear specifications, RFCs and architectural decision records
- Strong judgment in design and pull-request review: able to distinguish consequential issues from preferences and raise the quality bar without becoming a bottleneck
- Experience with event-driven or workflow systems, asynchronous execution, queues and distributed coordination
- Strong understanding of modern frontend architecture and the operational systems that support a sophisticated web application
- The ability to turn product goals and incomplete requirements into tractable technical plans, expose risk early and drive decisions to closure
- High agency, intellectual honesty and a willingness to take responsibility for outcomes across team and system boundaries
- Willingness to work with us in person from our London office
Skills
- TypeScript
- Rust
- Distributed systems
- State management
- Consistency
- Concurrency
- Messaging
- Retries
- Idempotency
- Fault tolerance
- Observability
- Architecture ownership
- Engineering leadership
- Technical communication
- Design review
- Pull request review
- Event-driven systems
- Workflow systems
- Asynchronous execution
- Queues
- Distributed coordination
- Frontend architecture
- Operational systems
- Product goal translation
- Risk assessment
- Decision driving
- Incident response
- Knowledge graphs
- Graph databases
- Connector platforms
- Synchronization platforms
- WebAssembly
- AI-assisted development
Location
- London
Work Type
- In-person
Experience Level
- Advanced
- Expert
Salary/Compensations
- £120,000-£175,000 base + meaningful equity
About the Company
- HASH is building infrastructure to solve information failure and help everybody make the right decisions.
- Our open-source platform helps organizations turn fragmented information into typed, temporal knowledge and process graphs that support analysis, simulation, optimization and automation.
- We're building towards world models from a different starting point from most AI labs: explicit representations of real systems, the entities within them and the processes through which they change.
- Our founders include Joel Spolsky, who founded Stack Overflow and Trello; Jude Allred, formerly CTO of Glitch; and Dei Vilkinsons, formerly CEO of Soho Strategy.