Senior Software Engineer

Humana

. Design, build, and maintain explicit state machines governing lifecycle transitions, validation, and time-based or event-driven changes .

Posted 10/5/2026full-timeUnited StatesSenior💰 $106,900 - $147,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and managing state machines and transactional state stores, ensuring high-concurrency operations and system reliability. Proficient in implementing idempotency controls and developing resilient APIs while mentoring engineers in distributed systems.

Highest-signal resume keywords

State Machine ModelingTransactional State StoresIdempotent API DesignContemporary Programming LanguagesAI-Assisted Development Tools

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

State Machine ModelingLifecycle ManagementIdempotent API DesignExactly-Once ProcessingFailure Modes in Distributed EnvironmentsJavaKotlinGoPythonObservability Engineering

Soft Skills

MentoringCollaboration

Tools & Technologies

AI-Powered Development ToolsMessaging PlatformsStreaming Platforms

Industry Keywords

Distributed SystemsConcurrencyState IntegrityEvent-Driven ChangesPHI/HIPAA Compliance

Tech Stack

Tools & technologies

Distributed SystemsJavaKotlinPythonGo

About the role

Key responsibilities & impact

Design, build, and maintain explicit state machines governing lifecycle transitions, validation, and time-based or event-driven changes
Architect and manage transactional state stores as the single source of truth
Support safe, high-concurrency read/write operations and uphold system invariants during failures and recovery
Implement idempotency controls so requests can be retried safely, commands execute at most once, and duplicate events do not compromise state integrity
Develop APIs and workflows resilient to retries, restarts, and replay events
Employ the outbox pattern to guarantee atomicity of state updates and event publication
Prevent loss or duplication of side effects and maintain separation between state mutation and downstream event delivery
Facilitate replay, backfill, and recovery operations without breaching state guarantees
Integrate with messaging and streaming platforms
Design for correctness under concurrent updates, network partitions, partial failures, and service redeployments
Apply idempotency keys, optimistic and pessimistic locking, event ordering, and causality
Use AI-powered and agentic tools to generate and validate tests, probe edge cases, assist code reviews, refactoring, documentation, debugging, incident analysis, and root cause discovery
Engineer robust observability through structured logging, metrics, alerting, and distributed tracing
Ensure state transitions and emitted events are traceable, reproducible, and auditable
Partner with platform, data, and quality engineering teams to assure end-to-end reliability
Participate in architecture and design reviews
Mentor and guide engineers on safe, reliable, and maintainable distributed systems
Deliver deterministic, retry-resilient state transitions and exactly-once side effects
Ensure systems recover gracefully from crashes and redeployments

Requirements

What you’ll need

Bachelor's degree in computer science or related field
6+ years of experience in backend or platform engineering
Hands-on expertise with state machine modeling and lifecycle management
Experience with transactional state stores
Experience with idempotent API and workflow design
In-depth understanding of exactly-once or effectively once processing
In-depth understanding of failure modes in distributed environments
Proficiency in one or more contemporary languages, such as Java, Kotlin, Go, or Python
Experience with AI-assisted development tools for productivity and code quality
Ability to currently live in, or relocate to, a commutable distance from an approved location for a hybrid work arrangement
Minimum home internet speed of 25 Mbps download and 10 Mbps upload for home or hybrid employees
Dedicated workspace without ongoing interruptions to protect member PHI/HIPAA information

Benefits

Comp & perks

Bonus incentive plan based on company and/or individual performance
Medical, dental, and vision benefits
401(k) retirement savings plan
Paid time off
Company and personal holidays
Paid parental and caregiver leave
Short-term and long-term disability
Life insurance
Wellness and healthcare decision support benefits
Occasional travel to Humana offices for training or meetings
Work-from-home or hybrid work arrangement