Sr. Software Engineer

Our Mission: 

6sense is on a mission to revolutionize how B2B organizations create revenue by predicting customers most likely to buy and recommending the best course of action to engage anonymous buying teams. 6sense Revenue AI is the only sales and marketing platform to unlock the ability to create, manage and convert high-quality pipeline to revenue. 

Our People: 

People are the heart and soul of 6sense. We serve with passion and purpose. We live by our Being 6sense values of Accountability, Growth Mindset, Integrity, Fun and One Team. 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. 

You are a Software Engineer who thrives on solving complex, abstract problems and building scalable systems that power high-impact business  functionality. You have a strong intuition for designing flexible, performant data querying frameworks and can architect systems that transform abstract logic into optimized query plans across diverse database backends. You are not afraid to dive deep into large codebases, work with intricate logic trees, or optimize SQL for billion-row tables. You understand the art of abstraction—how to create services and SDKs that are both powerful and intuitive to use. You have a collaborative mindset, a bias toward ownership, and the grit to deliver in high-scale environments. You have good communication skills, a ‘can do’ entrepreneurial attitude, and a team-oriented mindset.

Key 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.

Required Qualifications and Must-Have Skills

• 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).

Nice to Have

• 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.

Interpersonal Attributes

• You are a system thinker who enjoys building platforms that empower other developers.
• You can articulate complex logic clearly to both technical and non-technical audiences.
• You take ownership and pride in your work, pushing toward elegant, maintainable solutions.
• You’re curious, adaptable, and open to evolving with the framework as it grows in scope and complexity.
• You value teaching and mentoring, and you’re capable of guiding others through architectural tradeoffs and best practices.

Base Salary Range: $175,389.38 - $257,237.75. The base salary range represents the anticipated low and high end of the base salary range for this position. Actual salaries may vary and may be above or below the range based on various factors, including but not limited to work location and experience. The base salary is one component of 6sense’s total compensation package for this position. Other compensation may include a bonus program or commission plan, and stock options if approved by 6sense’s board. In addition, 6sense provides a variety of benefits, including generous health insurance coverage, life, and disability insurance, a 401K employer matching program, paid holidays, self-care days, and paid time off (PTO). #Li-remote

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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 to race, color, religion, sex, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, or disability status. If you require reasonable accommodation in completing this application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please direct your inquiries to jobs@6sense.com. 

We are aware of recruiting impersonation attempts that are not affiliated with 6sense in any way. All email communications from 6sense will originate from the @6sense.com domain. We will not initially contact you via text message and will never request payments. If you are uncertain whether you have been contacted by an official 6sense employee, reach out to jobs@6sense.com