Senior Full Stack Developer (Python, React, AI/LLM)

Posted Yesterday
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Hiring Remotely in Україна
Remote
Senior level
Computer Vision • Software
The Role
Build end-to-end features for a multi-tenant B2B AI customer-support platform. Develop Python and FastAPI backend services, orchestrate LLM workflows on AWS, create React and TypeScript frontends, integrate helpdesk systems, and implement testing, observability, security, and architectural standards. Collaborate with product and QA to deliver measurable improvements in AI accuracy and latency.
Summary Generated by Built In
About the role

Helpware is building a multi-tenant B2B AI platform for customer support operations — a product portfolio spanning Agent Assist, AI-powered QA, document processing, support automation, workforce management, and others.

We're looking for a Sr. Full Stack Developer to build product features end-to-end – services that orchestrate LLM workflows on AWS, and the frontends that put those capabilities in front of support teams and their supervisors. You'll work in a codebase governed by explicit engineering standards, so this role suits someone who values engineering discipline as much as shipping.

What you'll do
  • Build new features assited by Claude Code and relying on AI Spec Driven Design Development.
  • Design and build backend services in Python (FastAPI) on a multi-tenant PostgreSQL data model, including async and batch workloads (AWS Lambda, Batch, ECS).
  • Integrate LLM capabilities into product features, primarily using Amazon Bedrock and agentic workflows, following the platform's prompt management and evaluation conventions.
  • Build responsive, accessible web frontends (React / TypeScript) for supervisor dashboards, review queues, and configuration surfaces.
  • Implement integrations with customer helpdesks and third-party systems (webhooks, REST APIs, MCPs).
  • Instrument everything you ship per the platform's architectural standards.
  • Write tests, participate in code review, and contribute to ADRs when your work touches architectural decisions.
  • Work with product and QA to turn accuracy and latency targets into shipped, measured features.
What we're looking for
  • 5+ years building production web applications across backend and frontend.
  • Strong Python; production experience with FastAPI or a comparable async framework.
  • Experience with Claude Code and AI Spec Driven Design
  • Solid relational database skills (PostgreSQL preferred), including experience with multi-tenant data models or a clear grasp of tenant isolation patterns.
  • Proficiency in a modern frontend framework (React preferred) with TypeScript.
  • Experience consuming or building LLM-powered features: prompt design basics, streaming responses, handling latency/cost/failure modes of model APIs.
  • Comfort with AWS fundamentals (ECS/Lambda, S3, RDS, IAM basics) — you don't own the infrastructure, but you deploy to it and debug in it.
  • Habit of working within standards: structured logging, tracing, contract tests, linters — and improving them rather than routing around them.
Nice to have
  • Hands-on experience with Amazon Bedrock, Bedrock Guardrails, or LLM gateways (e.g., LiteLLM).
  • Familiarity with LLM observability tooling (Langfuse, OTel GenAI semantic conventions) or agent frameworks (CrewAI, LangGraph).
  • Experience in customer support / contact center / BPO tech, or with helpdesk APIs (Zendesk, Freshdesk, Intercom, etc.).
  • Exposure to PII handling, data governance, or compliance-sensitive domains (SOC 2, HIPAA, GDPR).

Skills Required

  • 5+ years building production web applications across backend and frontend
  • Strong Python experience
  • Production experience with FastAPI or a comparable asynchronous framework
  • Experience with Claude Code and AI Spec Driven Design
  • Strong relational database skills, preferably PostgreSQL
  • Experience with multi-tenant data models or tenant isolation patterns
  • Proficiency with a modern frontend framework, preferably React, and TypeScript
  • Experience building or consuming LLM-powered features, including prompt design, streaming responses, and model API latency, cost, and failure handling
  • Familiarity with AWS fundamentals including ECS, Lambda, S3, RDS, and IAM
  • Experience working with structured logging, tracing, contract tests, and linters
  • Hands-on experience with Amazon Bedrock, Bedrock Guardrails, or LLM gateways such as LiteLLM
  • Familiarity with LLM observability tooling such as Langfuse or OpenTelemetry GenAI semantic conventions
  • Familiarity with agent frameworks such as CrewAI or LangGraph
  • Experience in customer support, contact center, or BPO technology
  • Experience with helpdesk APIs such as Zendesk, Freshdesk, or Intercom
  • Exposure to PII handling, data governance, or compliance-sensitive domains such as SOC 2, HIPAA, or GDPR
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The Company
HQ: Lexington, KY
1,061 Employees
Year Founded: 2015

What We Do

Founded in 2015, Helpware is a company taking a modern approach to the outsourcing industry. We created the company to change perceptions of what outsourcing is and can be, and we did that by building amazing cultures in each of our locations, and by simply treating our employees better. With Helpware, we are all a team and family, and you'll see that true difference when partnering with us. Helpware builds customized teams in Customer Service and Back Office for industry-leading startups and modern companies. With offices in California, Colorado, Kentucky, Ukraine, Philippines, Germany, and Mexico, we have the global scale to tailor custom teams and processes for success to our many powerhouse clients. Helpware has grown over the years, initially catering to startup client partners, and has now evolved into creating client partnerships with large enterprises as well.

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