• Build and ship features end to end across React Native (mobile), React (web dashboards), and a serverless TypeScript backend • Implement product flows from UI and data entry through API logic, persistence, and status/error handling • Write and consume clean API contracts, with shared validation schemas across mobile, web, and backend • Own integrations with financial and payment-rails partners, wiring third-party APIs and webhooks (payment processors, settlement rails, KYC, banking) into our services with idempotent, faulttolerant handling • Work in a serverless AWS stack (Lambda, DynamoDB) with TypeScript infrastructure-as-code • Collaborate with the frontend and backend leads, absorbing work on either side as priorities shift • Keep an eye on quality where it matters: typed interfaces, sensible tests, and correct handling of edge cases in a financial product • Help maintain a clean, shared monorepo where types and components are reused, not duplicated • Use AI-assisted development as your default workflow, and help keep our shared context docs current so teammates and agents stay informed

• Design, implement, test, and release features end-to-end with limited guidance. • Independently identify edge cases and potential failure modes within assigned work. • Write clean, maintainable code and provide constructive, specific feedback during code reviews. • Proactively communicate blockers or ambiguities to the team. • Apply practical knowledge of federated identity standards including OAuth 2.0, OIDC, SAML 2.0, and JWT. • Understand and reason about authorization frameworks, policy enforcement, and integration into upstream and downstream services. • Reason clearly about token lifecycle, session management, and the security implications of identity design choices. • Understand the mechanics of connecting distributed services in a multi-product platform environment. • Build and maintain integrations that are observable, fault-tolerant, and respectful of downstream consumers. • Write and work with API contracts (REST, event-driven patterns) with attention to versioning and backwards compatibility. • Actively use AI-assisted development tools (e.g., Claude Code, Codex) to accelerate design, implementation, and validation. • Participate in building and improving AI-assisted workflows and evaluation harnesses. • Stay current on evolving AI tooling and introduce new approaches to the team. • Write tests with sufficient coverage to catch regressions without over-engineering. • Contribute to operational health by monitoring shipped features, responding to issues, and following incidents to resolution. • Document systems and processes to reduce reliance on tribal knowledge. • Build and extend platform services for federated identity, authentication, and authorization. • Implement integrations with the centralized identity platform, including token handling and session management. • Support product teams with integration processes, debugging, and navigating edge cases. • Develop tooling, documentation, and examples for self-service integrations. • Design and implement backend service integrations using Python and common patterns. • Build with multi-product and multi-tenant scenarios in mind. • Participate in API design reviews. • Use AI development tools as an active part of the delivery workflow. • Contribute to AI harness development to improve team velocity. • Share effective AI-assisted engineering patterns with the team. • Write unit, integration, and acceptance tests. • Instrument services for observability (logging, metrics, alerting). • Participate in on-call rotations and incident response. • Participate in design discussions and code reviews, giving and receiving feedback constructively. • Provide mentorship and review support to junior engineers. • Contribute to internal documentation, runbooks, and onboarding materials.

Role Description You will take ownership of the search infrastructure for Ask Seeking Alpha — a financial intelligence platform powered by LLMs. Your main goal is to ensure our AI agents can find the exact financial data they need (articles, transcripts, news) in milliseconds. You will work on the Retrieval layer of our RAG architecture, combining traditional text search with modern vector search techniques. Tech Stack: - Elasticsearch (v8+) - Python (FastAPI, Asyncio) - OpenAI Embeddings - LangChain - LangSmith The Senior Search Engineer will be engaged with the company as a contractor (Private Entrepreneur). What You'll Do - Search Engine Development: Design and implement Hybrid Search strategies. You will figure out how to best combine "keyword matching" (finding specific tickers like 'AAPL') with "semantic search" (finding concepts like 'revenue growth'). - Relevance Tuning: You are responsible for the quality of search results. You will build systems to measure and improve how well the search engine answers user queries (using tools like LangSmith). - Vector Search & RAG: Manage the integration of OpenAI embeddings into Elasticsearch. You will solve challenges related to indexing long documents (e.g., earnings transcripts) so the AI retrieves only the most relevant parts. - Performance Optimization: Optimize Elasticsearch queries and index settings to ensure low latency, even for complex queries with many filters. - Python Backend: Develop and maintain the Python services that build queries and process results. We use FastAPI and Asyncio heavily. Qualifications - 5+ years of experience working with Search Engines in production. - Understanding of how indices, analyzers, and mappings work "under the hood." - Understanding the difference between Lexical Search (keywords) and Vector Search (meaning), and know when to use which. - Strong experience with Python 3.10+. - Comfortable writing asynchronous code (async/await) and building APIs. - Experience designing data schemas for search (how to structure JSON documents for efficient retrieval). Requirements - Experience building RAG (Retrieval-Augmented Generation) pipelines. - Familiarity with LangChain or similar LLM frameworks. - Experience with Evaluation tools (like LangSmith) to test search quality automatically. - Background in Finance (understanding tickers, earnings calls, etc.).

• Adopt Kotlin or Rust to develop high-performance, stable service components and client-side modules • Undertake end-to-end project delivery work, control development progress, resolve technical risks and online faults to ensure on-time and high-quality project launch • Provide technical support and technical communication for internal and external partners of the AI ecosystem • Sort out technical documents and operation specifications • Assist in sorting out technical solutions for customer business scenarios • Output technical consultation materials when needed