Senior Software Engineer

Summary

Join 6sense, a company revolutionizing B2B revenue generation through predictive analytics and AI-powered engagement strategies. As a Software Engineer, you will be responsible for developing and maintaining a framework that translates complex filter sets into efficient query plans for various database backends. You will design and build scalable, robust solutions for massive datasets, ensuring optimal performance and usability. This role requires strong experience in backend engineering, data structures, algorithms, SQL optimization, and cloud services. You will collaborate with other teams to ensure your services meet evolving needs and contribute to the continuous improvement of the framework.

Requirements

• BS/MS in Computer Science or a related technical field
• 5+ years of backend engineering experience, ideally in data-intensive systems
• Strong foundation in data structures, algorithms, and software architecture
• Deep experience in writing complex, optimized SQL across distributed data stores
• Hands-on expertise in Python (preferred), with willingness or experience working in Java
• Familiarity with database internals and performance tradeoffs for engines like SingleStore, Trino, Hive, Spark, or Databricks
• Proven success in building systems that scale to billions or trillions of records
• Comfort working with dynamic schema modeling, ORMs, and custom DSLs
• Proficient in cloud services (AWS, GCP, or Azure), and containerized environments (Docker, Kubernetes)

Responsibilities

• Own and evolve a framework for turning dynamic, logic-driven filter sets (arranged in complex and/or trees) into performant query plans for multiple backends
• Translate filter trees with native object types, dynamic operators, parameters, and internal relationships into efficient queries for query engines such as SingleStore and Trino
• Ensure that heterogeneous filters (e.g., leads, accounts, activities) can be composed and executed to produce the correct unified output object type
• Design and develop reusable SDKs and microservices that empower other engineering teams to consume the query framework as a self-service platform
• Build scalable solutions that are robust to high cardinality, massive datasets (billions to trillions of rows), and distributed database architectures
• Identify optimization opportunities and contribute to the framework’s resilience, scalability, and developer usability
• Partner closely with teams building Segments, Sales Intelligence, Workflows, and Analytics to ensure your services meet broad, evolving needs
• Collaborate with Architects, Product Managers, and peer engineers to drive continuous improvements and architectural evolution

Preferred Qualifications

• Prior experience developing query compilers, rule engines, or logical plan optimizers
• Knowledge of API design patterns, SDK usability, and self-service frameworks
• Experience with feature flagging, A/B testing infrastructure, or internal developer platforms
• Background in analytics tooling, CRM/marketing automation platforms, or large-scale data enrichment pipelines
• Familiarity with CI/CD tools like Jenkins or GitHub Actions and test automation strategies

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