Founding Tech Lead (GrowthBricks)
Amsterdam · Belgrade, Serbia · Berlin · Madrid · Paphos, Cyprus · Remote · Warsaw · Cyprus · Czech Republic · Netherlands · Poland · Serbia · Remote · Posted Sep 29, 2026
At a glance
- Workplace
- Remote
- Location
- Amsterdam · Belgrade, Serbia · Berlin · Madrid · Paphos, Cyprus · Remote · Warsaw · Cyprus · Czech Republic · Netherlands · Poland · Serbia
About Rain
- We create intelligent software development tools for developers and teams. More than 15 million users, over 300,000 companies, and 88 of the Fortune Global Top 100 rely on our products to solve real, complex problems. Our mission is simple: make development teams more productive and AI adoptable at scale.
- GrowthBricks is a new project at JetMinds, backed by JetBrains, designed to give GTM teams and AI agents a shared business brain. Business context usually gets fragmented across CRMs, documents, dashboards, and people's heads. GrowthBricks brings that context together so agents and people can make decisions and execute effectively across the sales, marketing, and product stack.
About the role
- The Founding Tech Lead will own the technical architecture and core systems for GrowthBricks, a new project backed by JetBrains. This hands-on role involves building agentic workflows and memory systems that integrate with GTM stacks to drive business outcomes. You will work directly with the product founder to shape the product from a blank repository to a functional, production-ready system.
Responsibilities
- Design core architecture across business context, agents, memory, tools, and feedback loops.
- Build agentic workflows that reason over company context and act across CRM, sales, marketing, and product systems.
- Create context extractors to process sales calls, emails, internal docs, CRM states, and campaign data.
- Manage prompting, context management, memory, tool choice, and orchestration.
- Connect GrowthBricks to the existing GTM stack.
- Decide where to leverage MCP, APIs, or open-source frameworks versus custom solutions.
- Prototype quickly and turn effective ideas into production primitives.
- Write early-stage code and make key architectural decisions.
Requirements
- Hands-on experience building, evaluating, and refining LLM applications, agents, or agentic workflows used by real people.
- Demonstrated experience designing backend systems, data models, APIs, and integrations.
- Working knowledge of context management, memory patterns, prompting strategies, and tool orchestration.
- Comfort working in zero-to-one environments with high technical autonomy.
- Practical mindset that values simple solutions over unnecessary complexity.
- Confidence making key architectural decisions when requirements are evolving.
- Focus on end-user impact and willingness to iterate based on feedback.
Preferred qualifications
- Practical understanding of modern GTM stacks such as CRMs, enrichment tools, or marketing automation.
- Experience in solution engineering, sales engineering, or pre-sales.
- Experience building software for GTM teams.
- Experience automating sales or marketing workflows with agents or LLMs.
- Experience owning a technical product from a blank repository to production usage.
Benefits
- Competitive base salary
- Flexible work schedule
- Extra time off
- Learning and development opportunities
- Relocation support
- Free meals and snacks
- Health and wellness benefits including on-site gyms or sports club stipends
- Internal events
Workplace
- Flexible work schedule with the freedom to work from home or from the office.
- Multiple office locations available including Amsterdam, Belgrade, Berlin, Madrid, Paphos, Warsaw, and various countries.
Skills
- LLMs
- Agentic Workflows
- Backend Systems
- APIs
- Prompting
- Context Management
- MCP
- CRM
- Marketing Automation
