Senior Back End Developer

Just_; Dallas (TX); On-site; USD 120,000 - 150,000; Full time

Job summary

A leading tech company in Dallas is seeking a Senior Backend / Infrastructure Engineer to design and scale the data automation backbone for their products. You will build APIs, manage AWS infrastructure, and work closely with product leaders, ensuring you play a significant role in shaping the company's future. Ideal candidates have over 8 years of experience in backend engineering and are proficient in Node.js, TypeScript, and Python. Embrace an environment of high ownership with a focus on workflow automation and AI.

Qualifications

• 8–10+ years of backend engineering experience, B2B SaaS preferred.
• Proficient in Node.js and TypeScript.
• Experience with AWS services like RDS and S3.
• Solid SQL fundamentals.

Responsibilities

• Build and maintain Node.js + TypeScript APIs.
• Design and deploy Python services for document ingestion.
• Manage infrastructure on AWS.
• Set up job queues and background workers.

Skills

Node.js

TypeScript

Python

AWS

SQL

Tools

Terraform

Prisma

FastAPI

Job description

Job Overview

Type: Full-time or long-term contract

About Us

We’re on a mission to transform how professional services are delivered. By combining AI, data science, and intuitive design, we’re helping industry experts work faster, smarter, and with greater impact. Just will win by reducing repetitive tasks, increasing precision and quality — ultimately raising productivity across the board.

The founding team includes proven executives from companies with successful exits. We move quickly, stay close to customers, and care a lot about building a real, durable business.

If you get energy from zero-to-one, rapid‑paced environments and want meaningful ownership instead of just “another job,” this will feel like home.

The Role

We’re looking for a Senior Backend / Infrastructure Engineer to design and scale the data + automation backbone that powers multiple products.

This isn’t a narrow backend role. You’ll own everything from clean APIs and async workflows to document ingestion pipelines, LLM orchestration, and reliability.

If you like turning messy real‑world documents (PDFs, policies, comps, emails) into structured, reliable systems — this is your zone.

What You’ll Do

• Build and maintain Node.js + TypeScript APIs for core product workflows.
• Design and deploy Python services for document ingestion, OCR, and LLM‑powered analysis.
• Stand up data pipelines that process and normalize PDFs, spreadsheets, and API feeds.
• Manage infrastructure on AWS — ECS/Fargate, Lambda, RDS, S3, EventBridge.
• Set up job queues and background workers for long‑running tasks.
• Own CI/CD, observability, and reliability from day one (GitHub Actions, CloudWatch, etc.).
• Help define our engineering culture — code review standards, documentation, releases.

What We’re Looking For

• ~8–10+ years of backend engineering experience (B2B SaaS or data‑heavy products preferred).
• Proficient in Node.js and TypeScript.
• Comfortable writing production‑grade Python (data pipelines, FastAPI, or ML integration).
• Solid experience with AWS, RDS, S3, and at least one IaC tool (Terraform/Pulumi).
• Strong SQL fundamentals; experience with Prisma, Drizzle, or SQLAlchemy is a plus.
• Familiar with queues, retries, and idempotent job design.
• Pragmatic: you know when to hack and when to design properly.
• Self‑directed and comfortable in a rapid‑paced, low‑process environment.

Nice to Have

• Worked with OCR/LLM APIs (Textract, OpenAI, LangChain, etc.).
• Familiar with search/indexing systems (OpenSearch, Elasticsearch, pgvector).

Who You Are

• You think in systems, not just endpoints.
• You’ve shipped production systems where uptime and data accuracy matter.
• You enjoy building greenfield infrastructure without a 20‑person DevOps team.
• You’re comfortable working directly with a business and product leaders.
• You value clean architecture but bias toward shipping and learning.

Why Join Now

• Greenfield codebase — define the architecture and tooling from the start.
• Work at the intersection of workflow automation + AI in industries that are (finally) ready to modernize.
• High ownership, low bureaucracy — your work directly shapes the product and company.
• Small, sharp team that moves quickly and cares about outcomes.

Seniority level

• Mid‑Senior level

• Full‑time

Job function

• Engineering and Information Technology

Industries

• Technology, Information and Internet