We are seeking an accomplished Senior Software Engineer to design, implement, and operate mission-critical stateful services that form the backbone of real-time, automated decisioning and personalization platforms. These systems are responsible for maintaining authoritative state, orchestrating lifecycle transitions, and ensuring reliable downstream effects—often in high-concurrency, low-latency environments.
This position is ideal for engineers with a strong grasp of state machines, idempotency, distributed systems, and “exactly-once” execution semantics. You will also employ advanced AI-assisted and agentic engineering tools to drive correctness, velocity, resilience, and scalability.
Key Responsibilities
State Machine Architecture & Implementation
Design, build, and maintain explicit state machines governing:
Lifecycle transitions (e.g., open 10 in progress 10 completed 10 suppressed)
Validation of permissible transitions
Time-based and event-driven changes
Ensure state machines are:
Clearly modeled and not hidden in code logic
Deterministic, reproducible, and auditable
Easily understood and testable
Robust against illegal or duplicate transitions through comprehensive validation
Transactional State Memory & Exactly-Once Processing
Architect and manage transactional state stores serving as the single source of truth
Support safe, high-concurrency read/write operations
Uphold system invariants across partial failures and recovery scenarios
Implement robust idempotency controls so:
Requests can be safely retried
Commands execute at most once
Duplicate events do not compromise state integrity
Develop APIs and workflows resilient to retries, restarts, and replay events
Reliable Side Effects via Outbox Pattern
Employ the outbox pattern to guarantee atomicity of state updates and event publication
Prevent loss or duplication of side effects
Maintain clear separation between state mutation and downstream event delivery
Facilitate replay, backfill, and recovery operations without breaching state guarantees
Integrate seamlessly with messaging and streaming platforms, ensuring fault tolerance
Distributed Systems & Concurrency Management
Design for correctness under concurrent updates, network partitions, partial failures, and service redeployments
Apply expertise in:
Balance rigorous correctness with performance and latency requirements
AI-Assisted & Agentic Engineering Practices
Observability, Auditability & Trust
Collaboration & Technical Leadership
Partner with platform, data, and quality engineering teams to assure end-to-end reliability
Participate in architecture and design reviews to elevate system quality standards
Mentor and guide engineers on best practices for safe, reliable, and maintainable distributed systems
Use your skills to make an impact
Required Qualifications
Bachelor's degree in computer science or related field
6+ years of experience in backend or platform engineering
Demonstrated hands-on expertise with:
State machine modeling and lifecycle management
Transactional state stores
Idempotent API and workflow design
In-depth understanding of:
Proficiency in one or more contemporary languages (e.g., Java, Kotlin, Go, Python)
Experience with AI-assisted development tools for productivity and code quality
Preferred Qualifications
Experience with outbox, transactional messaging, or event sourcing patterns
Familiarity with low-latency, high-throughput architectures
Operational experience in systems requiring strict auditability and correctness
Background in regulated or mission-critical domains
Success Indicators
State transitions are precise, deterministic, and resilient to retries
Side effects reliably occur exactly once, even during failures or replays
Systems recover gracefully from crashes and redeployments
AI-driven tooling decreases defect rates and expedites debugging
The state layer is trusted as the definitive source of truth across engineering teams
Why This Role is Critical
In contemporary automated platforms, correctness and reliability hinge on the integrity of state, not just requests. This role ensures that every state transition and side effect is executed once—and only once—providing a solid foundation for trust, reliability, compliance, and scalability throughout the system.
Qualified candidates are required to currently live in, or be willing to move to, a commutable distance for a hybrid (3 days in-office) work arrangement
Location options are currently:
Washington, D.C. metropolitan area
Louisville, KY metropolitan area
Denver, CO metropolitan area
Dallas, TX metropolitan area
Ft. Lauderdale, FL metropolitan area
Work Style: Remote/Hybrid.
Occasional travel to Humana's offices for training or meetings may be required.
Work Hours: Typical business hours are Monday-Friday, 8 hours/day, 5 days/week-- some flexibility might be possible, depending on business needs.
Very minimal travel might be required for training, meetings, and/or conferences
Interview Format
As part of our hiring process, we will be using on-demand technology provided by Hire Vue, a third-party vendor. This technology provides our team of recruiters and hiring managers with an enhanced method for decision-making through on-demand candidate assessments.
If you are selected to move forward from your application prescreen, you will receive correspondence inviting you to participate in an on-demand assessment with pre-determined questions. You should anticipate the assessment to take approximately 10-15 minutes.
Your on-demand assessment will be reviewed, and you will subsequently be informed if you will be moving forward to next round of interviews.
SSN Task via Workday
Should you be extended a formal employment offer you will receive a request to enter your SSN into our Workday system to scan for duplicate profiles.
Work at Home Requirements: To ensure Home or Hybrid Home/Office employees9 ability to work effectively, the self-provided internet service of Home or Hybrid Home/Office employees must meet the following criteria: At minimum, a download speed of 25 Mbps and an upload speed of 10 Mbps is required; wireless, wired cable or DSL connection is suggested. In certain roles, the minimum recommended internet speed required by Humana may not be sufficient for business needs. Humana reserves the right to require associates to upgrade their internet service if necessary. Work from a dedicated space lacking ongoing interruptions to protect member PHI / HIPAA information.Travel: While this is a remote position, occasional travel to Humana's offices for training or meetings may be required.
Scheduled Weekly Hours
40
Pay Range
The compensation range below reflects a good faith estimate of starting base pay for full time (40 hours per week) employment at the time of posting. The pay range may be higher or lower based on geographic location and individual pay will vary based on demonstrated job related skills, knowledge, experience, education, certifications, etc.
$106,900 - $147,000 per year
This job is eligible for a bonus incentive plan. This incentive opportunity is based upon company and/or individual performance.
Description of Benefits
Humana, Inc. and its affiliated subsidiaries (collectively, 2Humana2) offers competitive benefits that support whole-person well-being. Associate benefits are designed to encourage personal wellness and smart healthcare decisions for you and your family while also knowing your life extends outside of work. Among our benefits, Humana provides medical, dental and vision benefits, 401(k) retirement savings plan, time off (including paid time off, company and personal holidays, paid parental and caregiver leave), short-term and long-term disability, life insurance and many other opportunities.
Application Deadline: 08-30-2026
