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Senior Software Engineer – Backend (USA Only, 100% Remote)

CloseUSA - RemoteEngineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Posted
10 Jan 2025
Status
Open · checked 7d ago

About this role

This Senior Software Engineer – Backend role at Close is a 100% remote opportunity based in the USA, perfect for seasoned engineers with a passion for building AI-driven sales software. The ideal candidate brings extensive development experience and thrives in a collaborative, autonomous environment.

Role Overview

Close is looking for a Senior Software Engineer – Backend to join its 100% remote, 120-person team. In this position, you will help build communication-first, AI-powered sales software designed to eliminate busywork for scaling businesses. When applying, you can select the team that appeals to you most—Agents, Communications, CRM, or Growth—where you will build agentic platforms, manage voice and messaging infrastructure, scale data models, or drive customer conversion experiments.

Key Responsibilities

Design, build, and scale backend infrastructure using Python Flask web apps, TaskTiger, and modern data stores.
Develop agentic platforms, customer-facing AI experiences, voice and SMS infrastructure, and agent-ready CRM data models.
Run experiments and own billing infrastructure, including Stripe metered billing and agentic onboarding funnels.
Ship high-impact features quickly, prioritizing early iterations and real-world customer feedback over perfection.
Build and maintain well-documented public APIs consumed by front-end applications and external integrations.

Requirements

At least 5 years of professional software engineering experience.
Demonstrated experience shipping LLM-backed features for real users with production-readiness in mind.
Active use of AI tools in your daily workflow to ship code faster and reason through unfamiliar codebases.
Strong background in building internet-facing APIs with an understanding of application, agent, and human user needs.
Battle-tested debugging skills and experience managing latency budgets or production incidents.

Nice to Have

Professional experience working across multiple languages such as Python, Go, Rust, or TypeScript.

Skills and Tools

Python, Flask, TaskTiger, Rust, TypeScript, JavaScript
AWS, Kubernetes, Docker, Terraform, Ansible, EKS, MSK, RDS, ElastiCache, EC2
MongoDB, PostgreSQL, Elasticsearch, Redis
LLMs, Pydantic, Temporal, LangFuse

Salary and Benefits

Competitive compensation package alongside an organization-wide goal-based bonus.
Approximately 5 weeks of paid time off to start, plus a 1-week all-company Winter Holiday Break, paid US holidays, and 2 extra days earned for every year at the company.
Flexible work option to choose between a standard 5-day week or a 4-day week at 80% pay.
Paid parental leave and a 1-month paid sabbatical every 5 years.
Comprehensive US healthcare plans with Close covering 99% of medical premiums, plus Dental, Vision, HSA, FSA, and company-paid Long-Term Disability.
401(k) retirement plan with company match up to 6% and immediate vesting.

About the Company

Founded in 2013, Close builds a CRM designed to help sales teams sell more, faster without manual data entry or complex workflows. The company is bootstrapped, profitable, and proudly operates as a 100% remote team across the globe. Close integrates AI into every part of its product and values transparency, long-term thinking, and continuous investment in team members and customers.

How to Apply

To apply for this position, please visit the official Close careers page and complete the application process by answering the role-specific questions thoughtfully.

Skills and tech stack

PythonAWSKubernetesDockerTypeScriptJavaScriptRustLLMTerraform

Questions candidates ask

Is this job remote?

Yes, this is a 100% remote position restricted to candidates located in the USA.

What is the primary tech stack used at Close?

The backend tech stack primarily consists of Python Flask web apps, TaskTiger for asynchronous task processing, and data stores including MongoDB, PostgreSQL, Elasticsearch, and Redis. The infrastructure runs on AWS utilizing Kubernetes, Docker, and Terraform.

What engineering teams can I choose to work on?

Applicants can choose from four teams: Agents, Communications, CRM, or Growth, depending on their primary interests and skillset.

What kind of benefits are offered for US residents?

US residents receive competitive pay, goal-based bonuses, medical coverage with 99% of premiums paid by the company, dental, vision, HSA, FSA, long-term disability, a 401(k) match up to 6%, about 5 weeks of starting PTO, parental leave, and a paid 1-month sabbatical every 5 years.

How does Close handle work schedules?

Close offers an 80% work option where employees can work with their manager to choose between a standard 5-day work week or a 4-day work week at 80% pay.

Ready to apply?

The application is on the official Close careers page.

Apply on company site