Lead Software Engineer

This role is for one of the Weekday's clients

Requirements

Key Responsibilities

• Own and evolve the core backend architecture, including data models, APIs, queues, and processing pipelines
• Design, build, and maintain high-performance, reliable systems that handle traces and large-scale data efficiently
• Develop and manage APIs and services using modern backend frameworks, ensuring scalability and low latency
• Architect and operate data pipelines, storage layers, and integrations with relational and vector databases
• Work with cloud platforms (AWS and Azure) to design secure, resilient, and cost-effective infrastructure
• Implement and optimize observability, tracing, and monitoring using industry standards and tools
• Collaborate closely with the founder on product decisions, technical trade-offs, and long-term architecture
• Engage with users and internal stakeholders to understand real-world needs and translate them into technical solutions
• Set engineering best practices around code quality, performance, security, and reliability
• Contribute to technical roadmaps and help establish the foundation for future engineering hires
  

What Makes You a Great Fit

• Strong experience building backend systems using Python, with hands-on expertise in frameworks such as FastAPI
• Solid understanding of data modeling and storage using PostgreSQL and experience working with vector databases
• Proven ability to design and operate data pipelines and event-driven or queue-based architectures
• Experience working with cloud infrastructure on AWS and/or Microsoft Azure
• Familiarity with observability and tracing concepts, including tools and standards like OpenTelemetry
• Exposure to modern AI/LLM ecosystems and tooling such as LangChain is a strong advantage
• Comfortable working with TypeScript for APIs, services, or supporting systems
• Strong system design skills, with the ability to balance performance, reliability, and developer experience
• A product-minded engineer who enjoys early-stage environments, ambiguity, and direct ownership
• Excellent communication skills and the ability to collaborate closely with founders, users, and cross-functional partners