Staff Software Engineer (Backend)

Our Mission:

6sense's 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 are looking for a Staff Software Engineer to join our Core Integrations team. At Staff role, you are not just a strong individual contributor you are a technical multiplier. You set the direction for how integrations are built across the team, champion AI-native engineering practices org-wide, and ensure the platform scales with the business.

Core Technical Requirements :

Java (Expert) : 9+ years of production Java. You don't just write Java  you define how it should be written on the team. Deep expertise in JVM tuning, concurrency primitives, GC behavior, and framework internals (Spring Boot, reactive stacks). Can diagnose and resolve problem AI Adoption Across the SDLC Staff-Level Expectations don't just use AI — they define how the team uses it:

Practitioner : Uses AI assistants (Claude Code, Copilot, etc.) daily across the full SDLC — design, implementation, testing, code review, incident response, documentation.

Multiplier : Establishes team-wide AI workflows and prompt libraries. Runs internal sessions on effective AI-augmented engineering. Makes the team better at using AI, not just themselves.

Evaluator : Evaluates new AI tooling critically. Knows when AI output is trustworthy and when it's confidently wrong. Builds review practices that don't let hallucinations slip through.

Architect-level usage : Uses AI to accelerate system design — generates architecture options, stress-tests designs, produces tech specs, writes ADRs, and synthesizes cross-team context faster than any human could alone.

Adaptability & Polyglot Engineering :

Polyglot leadership: Has owned codebases in multiple languages and is comfortable evaluating new ones for the right use cases. Doesn't force Java where Python (or Go, or Rust) is the better fit.

Platform & Infrastructure : Has strong opinions on cloud-native deployment, container orchestration (Kubernetes), and CI/CD automation. Has designed or significantly shaped a team's deployment platform.

Emerging tech: Proactively evaluates and adopts new technologies. Is the person who evaluates whether a new tool is hype or signal — and can articulate why.Engineering Leadership.

Technical strategy : Owns multi-quarter technical roadmaps. Identifies systemic problems before they become incidents. Drives architecture decisions that span multiple teams or services.

Cross-team influence : Trusted technical voice beyond the Core Integrations team. Pulls in stakeholders, aligns on standards, and drives engineering initiatives at the org level.

Mentorship & growth: Actively develops SE II/III and SSE engineers — not just answering questions but building their judgment. Known for making the people around them better.

Reliability & production ownership: Has designed for production from day one. Defines SLOs, drives post-mortems, and turns incidents into systemic improvements not just hotfixes.

Communication : Writes clearly and persuasively. Can walk an executive through a complex integration failure or a new engineer through a distributed system design  and both leave with the right mental model.

Nice to Have :

Experience building partner/marketplace API platforms at scale.

Deep familiarity with CRM/MarTech ecosystems (Salesforce, HubSpot, Marketo, Outreach) or B2B data infrastructure.

Prior experience designing or operating a developer-facing integration platform (webhooks, OAuth flows, partner SDKs).

Has driven an org-wide engineering initiative — platform migration, AI tooling rollout, observability overhaul, etc.

Open source maintainer or significant contributor. 

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. A ll 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