Sr. Software Engineer (Backend)

Our Mission: Our mission is to multiply what matters: growth, retention, and efficiency. We envision a future where companies, teams and people reach their full potential. Our People: People are the heart and soul of 6sense. We serve with passion and purpose. We live by our Being 6sense values of Win as One Team, Stay Curious, Do The Right Thing, Own the Outcome, and Create Belonging. Every 6sensor plays a part in defining the future of our industry-leading technology. 6sense is a place where difference-makers roll up their sleeves, take risks, act with integrity, and measure success by the value we create for our customers. We want 6sense to be the best chapter of your career. As a Senior Backend Engineer, you’ll join a dynamic team responsible for building scalable, robust, and fault-tolerant backend systems. This is a high-impact role where you’ll work on critical projects that drive platform scalability, optimize performance, and improve system reliability for a global customer base. You will collaborate with cross-functional teams and have the opportunity to work on cutting-edge technologies while solving complex challenges. Your contributions will be instrumental in ensuring 6sense delivers seamless customer experiences. What You’ll Do : Build Scalable Systems:* Design, develop, and maintain APIs and microservices capable of processing millions of daily data requests and emails. Optimize Performance:* Enhance system reliability and ensure low-latency, high-availability services by leveraging Redis and other caching solutions. Focus on Email Deliverability:* Work on improving email systems and protocols (e.g., SMTP) to ensure high deliverability rates. Drive Innovation:* Partner with product, design, and frontend teams to develop new features and enhance existing functionalities. Cloud and Infrastructure:* Collaborate with DevOps to implement best practices in CI/CD pipelines and AWS infrastructure. Contribute to Architecture:* Participate in decisions about system architecture, tool adoption, and technology innovation. Technologies You’ll Work With : Ruby on Rails PostgreSQL Redis SingleStore AWS (ECS, RDS, Kinesis, Lambda, Terraform) Python What We’re Looking For : Experience : 5+ years of professional backend development experience, with a focus on scalable systems. Hands-on expertise with Redis, PostgreSQL, and AWS. Familiarity with email protocols (e.g., SMTP) and strategies for improving deliverability. Technical Skills : Proficiency in backend frameworks such as Ruby on Rails, Python, or Node.js. Strong understanding of microservices architecture and API design. Experience with cloud services (AWS) and containerization tools (Docker, Kubernetes). Soft Skills : Strong problem-solving ability and debugging skills. Effective communication and collaboration with cross-functional teams. A growth mindset with a passion for learning new technologies. Bonus Points : Experience with SingleStore or similar databases. Knowledge of distributed systems or TDD practices. Our Benefits: Full-time employees can take advantage of health coverage, paid parental leave, generous paid time-off and holidays, quarterly self-care days off, and stock options. We’ll make sure you have the equipment and support you need to work and connect with your teams, at home or in one of our offices. We have a growth mindset culture that is represented in all that we do, from onboarding through to numerous learning and development initiatives including access to our LinkedIn Learning platform. Employee well-being is also top of mind for us. We host quarterly wellness education sessions to encourage self care and personal growth. From wellness days to ERG-hosted events, we celebrate and energize all 6sense employees and their backgrounds. Equal Opportunity Employer: 6sense is an Equal Employment Opportunity and Affirmative Action Employers. Qualified applicants will receive consideration for employment without regard t ... (truncated, view full listing at source)