Close - Senior Software Engineer - Backend/Python (USA Only
Requirements
• 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) • 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.
Responsibilities
• A builder first. You’d rather get the first iteration of a feature in front of fifty customers than spend three weeks fretting over a perfect PR. You ship. • Opinionated about API design for modern software. You've shipped internet-facing APIs and you think about who's on the other end - apps, agents, humans poking around in docs - and what each of them needs. • Battle-tested. You've debugged incidents where latency budgets didn't hold, owned a system everyone else relied on, or carried a pager for something with real customer impact. • Our backend tech stack consists primarily of Python Flask web apps with our TaskTiger scheduler handling many of the backend asynchronous task processing chores. Our data stores include MongoDB, PostgreSQL, Elasticsearch, and Redis. The underlying infrastructure runs on AWS using a combination of managed services like EKS, MSK, RDS and ElasticCache and non-managed services running on EC2 instances. We have CI/CD pipelines that build Docker images, run automated tests and deploy to Kubernetes clusters. We also use these images in our local development environment allowing coding locally against all of our services. We have a well-documented public API that is consumed by our front-end JavaScript app as well as numerous integrations. Our infrastructure is heavily automated using Terraform, Ansible and other AWS tools.
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 • Our Values • Build a house you want to live in - Examine long-term thinking and action • No BS - Practice transparency and honesty, especially when it’s hard • Invest in each other - Build successful relationships with your coworkers and customers • Discipline equals freedom - Keep your word to yourself and others • Strive for greatness - Constantly challenge yourself and others • Learn More • Listen to our CEO and Founder, Steli Efti, tell the story of Close’s journey in the $0-30m Blueprint. • Watch our culture video from our 2023 team retreat in Milan. Every year our entire team gathers in person to build connection, foster cross-functional collaboration, and have fun. In 2026, we’re headed to Barcelona, Spain! • Explore our product. Check out a demo! • Our Hiring Process • We ask a few role-specific questions as part of our application process. These questions are designed to help us learn more about you from the start so please answer each question thoughtfully. We see this as an opportunity to get to know you beyond your resume. • While we are excited by all the opportunities that generative AI has unlocked, we request that you refrain from relying exclusively on AI tools when completing an application, unless explicitly stated. Every application is read closely by humans and any obviously AI generated applications will be disregarded. • Regardless of fit, you can expect to hear back from our team with an update on the status of your candidacy. • If you progress to the interview process, you’ll receive a full outline of the role-specific interview process in your first touchpoint with us. We do our best to make the hiring process clear and human.
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