Senior Backend Software Engineer

Staff Software Engineer

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. 

Role Overview

We’re looking for a Staff Software Engineer to serve as a technical pillar across our engineering teams. This role is ideal for a highly experienced backend engineer who thrives on solving hard problems, mentoring others, and guiding architecture across multiple domains. You’ll be a multiplier, operating independently, shaping technical direction, and partnering with engineers 
and product teams to raise the bar across the organization. 

You’ll work across squads to improve system performance, reliability, and scalability, while owning high-impact projects that support our Advertising platform. Whether it’s unblocking performance bottlenecks, leading design for new backend services, or reducing tech debt, your contributions will have a far-reaching impact. 

This is a high-impact role where you will not only write mission-critical code but also provide the AI-driven roadmap to help our team automate optimizations and anomaly detection within our data pipelines. 

Core Responsibilities 

• Own and lead design for major backend systems across Ads, focusing on performance, scalability, and reliability. 

• Serve as the subject matter expert for Python & Django. You will optimize application performance, focusing on concurrency, memory management, and efficient integration with our data layer. 

• Architect and optimize large scale data workflows for Ads. You will be expected to tune complex queries in Hive, Flink, or Trino to reduce latency and cost while maintaining data integrity. 

• Actively profile our stack to identify bottlenecks. You should be comfortable moving between high-level architectural planning and low-level query optimization. 

• Guide the engineering team in leveraging AI and Machine Learning for predictive analytics, automated QA of data streams, and enhancing our internal decision-making engines.  

• Collaborate with multiple teams to address cross team concerns (e.g., shared libraries, infra patterns, tech debt, security) 

• Tackle escalated production issues / incidents by providing quick remediations 

• Raise the engineering bar through elite code review, technical RFCs and hands on guidance for senior and mid-level engineers. 

• Work with EMs and PMs to shape technical roadmap and support long-term platform health. 
   

Technical Requirements 

• 10+ years in backend engineering with a proven track record of scaling systems in Ad-Tech, Fintech or High-Scale SaaS. 

• Deep expertise in building high concurrency, asynchronous services. You know how to scale Django beyond standard patterns. 

• Strong experience with distributed systems (e.g. Flink, Spark, Hive or SingleStore). You are an expert at optimizing distributed joins and partitioned datasets. 

• Advanced SQL skills; you can dissect an execution plan and optimize complex analytical queries for both performance and cloud cost. 

• Experience managing “Sync vs Async” data flows and ensuring consistency across disparate data stores 

• Experience with containerization technologies such as Docker and Kubernetes. 

• Familiarity with CI/CD pipelines and modern DevOps practices. 

• Strong communication skills with the ability to explain complex technical concepts to non-technical stakeholders is a must. 

• Proven leadership experience, including mentoring engineers and leading technical initiatives. 
   

Ideal Candidate 

• The Pragmatic Architect: You understand the trade-offs between “perfect” code and “performant” code in a high throughput environment. 

• The Data Integrity Advocate: You care deeply about how data is captured at the source just as much as how it is processed at scale. 

• The Force Multiplier: You don’t just solve problems; you build systems and processes that prevent them from recurring. 

• The Mentor: You thrive on helping others grow and can explain complex architectural concepts to both engineers and stakeholders. 

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 

Experience Level

Senior Level