Sr. Software Engineer II

Responsibilities

• Own the technical direction, architecture, interfaces, service boundaries, schemas, and data contracts for the team's systems.
• Build and review production backend services, APIs, shared libraries, operational data stores, and data-processing systems while staying hands-on weekly.
• Partner with product managers on feasibility, sequencing, and tradeoffs.
• Partner with Data Scientists and ML Engineers from problem framing through production serving, monitoring, and retraining.
• Lead design reviews and RFC discussions and make cross-cutting technical decisions.
• Support engineer development through code reviews and partnership with the engineering manager.
• Own operational health, including on-call quality, observability, and production systems.

Requirements

• Bachelor's or master's degree in Computer Science, Applied Mathematics, Engineering, or a related field, or equivalent practical experience.
• At least 7 years of experience building production software, including at least 2 years as a Tech Lead for a team or significant system.
• Experience building production backend services, APIs, internal platforms, or distributed applications.
• Experience designing APIs, data contracts, and operational databases consumed by other teams.
• Familiarity with asynchronous processing, queues, event-driven systems, change-data capture, idempotency, retries, concurrency, and backward compatibility.
• Working knowledge of machine learning and data science concepts, including feature engineering, evaluation, training and serving skew, drift, and retraining.
• Experience taking a model from notebook to production and leading technical discussions across software engineering and machine learning or data science.
• Experience improving team output through interfaces, tooling, or work decomposition and leading engineers without direct authority.
• Familiarity with cloud infrastructure, containers, CI/CD, infrastructure as code, and observability.
• Strong programming skills beyond SQL and experience owning systems through deployment, incident response, and on-call.
• Practical judgment about effective and unreliable uses of AI tools.

Benefits

• Medical, dental, vision, and life insurance coverage begins on the first day of employment.
• Paid parental leave, maternity support, nursing benefits, and adoption assistance are provided.
• Employees receive six licensed therapist sessions annually and Wellhub membership.
• At least 18 paid time-off days and six company holidays are provided annually for full-time employees.
• The company contributes 6% to a 401(k) plan each pay period without requiring employee contributions.
• Tuition reimbursement, student loan refinancing, financial counseling, charitable gift matching, employee discounts, and civic and cultural institution admission are available.
• Office perks include a coffee bar, beer on tap, unlimited snacks, an onsite gym, and city skyline views.
• The role uses a hybrid work model requiring team members to be onsite at least two days per week at the Chicago headquarters.