Close · 2 weeks ago
Senior Software Engineer - Backend/Python (USA Only - 100% Remote)
United States
Full-time
Remote
Senior Level, Lead/Staff
$140K/yr - $210K/yr
5+ years expClose is a profitable, 100% remote company focused on building a communication-focused CRM for small scaling businesses. The Senior Software Engineer will collaborate with cross-functional teams to design, implement, and scale major systems and user-facing features, while also enhancing the performance of their backend infrastructure.
CRMDatabaseEmailSaaSSalesSales AutomationSales EnablementSmall and Medium BusinessesSMSVoIP
No H1B
Responsibilities
Conceiving, designing, building, and launching new user-facing features
Implementing new AI features to turbocharge our customers’ daily tasks
Improving the performance and scalability of our GraphQL and REST API
Improving how we sync millions of sales emails and calendar events each month
Working with Twilio's API, WebSockets, and WebRTC to improve our calling features
Building user-facing analytics features that provide actionable insights based on sales activity data
Improving our Elasticsearch-backed powerful search features
Improving our internal messaging infrastructure using streaming technologies like Kafka and Redis
Building new and enhancing existing integrations with other SaaS platforms like Google’s G Suite, Zapier, and web conferencing providers
Enhancing our web app with real-time updates powered by GraphQL Subscriptions
Leveraging the latest AI LLMs from providers like OpenAI, Groq and AssemblyAI
Help manage our ever growing data processing needs
Billions of Mongo documents
Millions and millions of rows of PostgreSQL data
55 Terabytes of logs / month
500 billion OTEL spans over the last 30 days
10+ million events / day
Tens of thousands of docker containers
7 million minutes of call recordings / month
Petabytes / month of network traffic
Qualification
Required
Senior 1 & 2 level candidates should have 5+ years of experience building modern back-end systems
Staff level candidates should have 8+ years of experience
Professional Python experience is preferred but a working knowledge of Python with additional experience in other languages is acceptable if you have a desire to work with Python
You have built web APIs that were Internet facing or supported other high volume loads
You have hands-on production experience working with MongoDB, PostgreSQL, Elasticsearch, or similar data stores
You have experience designing, scaling, debugging, and optimizing systems to make them fast and reliable
You have participated in code reviews and provided overall code quality suggestions to help maintain the structure and quality of the codebase
You care about the craftsmanship of the code and systems you produce
You are able to speak and write in English
You are located in the USA (ET, CT, MT, PT)
Preferred
Contributed open source code related to our tech stack
Led small project teams building and launching features
Built B2B SaaS products
Implemented features that leveraged AI to deliver unimaginable new product capabilities
Worked with complex architectures that support multiple APIs (e.g. REST, GQL, WebSockets) as well as async task and event processing frameworks
Benefits
Competitive compensation including an organization-wide goal-based bonus
Paid Time Off: 5 Weeks PTO upon joining + Winter Holiday Break. Each year with the company, you’ll receive 2 additional PTO days
80% Work Option: Work with your manager to choose between working 5 day weeks (standard full-time) or 4 day weeks @ 80% pay
Paid Parental Leave for primary and secondary caregivers
Sabbatical: After 5 years with the team, you’re eligible for a 1 month paid sabbatical
Healthcare (US residents): Medical, Dental, Vision with HSA option (US residents), Dependent care FSA (US residents)
401k (US residents): We match 6% contributions with immediate vesting
Company
Close
A CRM for startups and small businesses with built-in sales communication tools.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
unknown2013-01-01Seed
2011-03-22Seed
Leadership Team
Steli Efti
CEO
Nick Persico
Product
Recent News
Growth Business UK
2025-06-11
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2025-03-19
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