Web \ Mobile \ Software Development
Senior FullStack Engineer – AI-First
Location
Ukraine
Posted
74 days ago
Salary
0
Seniority
Senior
Job Description
Senior FullStack Engineer – AI-First
Fulcrum
• Design and develop core product functionality for an AI-powered platform with autonomous agents • Build and improve the agent runtime that allows AI agents to execute tasks, interact with tools, and run in isolated environments • Develop chat-based and conversational interfaces that enable users to interact naturally with their AI agents • Implement and evolve the memory system that allows agents to learn from conversations and store long-term context • Design and build APIs and backend services powering agents, integrations, and real-time features • Work with vector databases and RAG pipelines to support intelligent retrieval and context building • Build real-time experiences (streaming responses, live updates) for interactive agent execution • Participate in building the multi-agent orchestration layer, enabling collaboration between multiple AI agents • Contribute to the AI tool ecosystem, integrating external services and building extensible agent skills • Collaborate with product, design, and engineering teams to iterate quickly and deliver new features
Job Requirements
- 3+ years of experience with JavaScript / TypeScript
- Strong experience with React (React 18+) and Node.js
- Experience building applications with Server-Side Rendering (SSR)
- Experience developing REST APIs
- Experience integrating LLM APIs (OpenAI, Anthropic, or similar)
- Experience working with databases (experience with SurrealDB or similar NoSQL databases is a plus)
- Experience with Redis or streaming systems (e.g., Redis Streams), also Docker and containerized environments
- Experience with Git-based workflows and CI/CD pipelines
- Understanding of basic security principles in web applications
- Ability to work in an AI-powered development workflow (using modern AI tools in development), with AI agents / agentic systems
- Experience with Own Agent Building
Benefits
- Flexible schedule & opportunity to work remotely or workspace in Kyiv
- Friendly & open team who have fun creating cool projects together
- Opportunity to boost your professional & personal growth
- Regular team gathering activities
- 20 business days of paid vacation + UA national holidays
- Medical insurance full coverage
- 10 + 5 days paid sick leave
Related Guides
Related Job Pages
More Full-stack Engineer Jobs
Senior Full-Stack Engineer
SynMaxUtilizing AI and satellite imagery, SynMax’s tools, Hyperion, Theia, and Leviaton, provide unrivaled insights.
• System Architecture: Design scalable near-real-time data streams, integrating data from multiple sources into analytics pipelines and relational databases. • Data Management and Access Optimization: Improve robustness and performance of our SQL DB setup to facilitate high performance inserts of our data streams and API reads for our customers • Data Visualization: Ensure vast quantities of geospatial and tabular data are visually explorable in a reproducible, performant format. • Accelerate Development: Utilize AI coding agents to assist in the Software Development Life Cycle (SDLC) and help establish best practices for agentic workflows. • Cross-Functional Support: Work alongside software engineers and data scientists, providing programming and infrastructure support for MLOps and data science initiatives. • Technical Direction: Help shape our engineering direction by implementing robust data management practices and staying current on emerging technologies in data processing. • Ensure Code Quality: Refactor, profile, and optimize codebases. Implement rigorous integration testing, debugging, and deployment automation for cloud microservices.
At Last Call, we're helping build a world where access to information is equitable and easy. Our engineers work across the stack to make public services more clear, accessible, and human. Join us in that effort! You'll own what you build, collaborate directly with teammates and clients, and contribute to how we grow as an engineering team. This role is part of a feature team streamlining resident access to government services.
At Last Call, we're helping build a world where access to information is equitable and easy. Our engineers work across the stack to make public services more clear, accessible, and human. Join us in that effort! You'll own what you build, collaborate directly with teammates and clients, and contribute to how we grow as an engineering team. This role is part of a feature team streamlining resident access to government services.
At Last Call, we're helping build a world where access to information is equitable and easy. Our engineers work across the stack to make public services more clear, accessible, and human. Join us in that effort! You'll own what you build, collaborate directly with teammates and clients, and contribute to how we grow as an engineering team. This role is part of a feature team streamlining resident access to government services.

