Freelance Java Backend Developer Jobs in Vermont

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We are searching for a Senior Software Engineer to architect, develop, and maintain action and policy platforms that enable real-time, personalized decisioning across both digital and assisted channels. These platforms determine which actions can be taken, contextual variations, and the conditions under which they are permitted, leveraging structured metadata, deterministic rule engines, and resilient backend services.

This position demands expertise in microservices development, advanced database schema design, and seamless integration of enterprise rules systems. You will be responsible for designing robust, scalable data models, building high-throughput, low-latency services, and integrating policy evaluation engines. Additionally, you will employ AI-assisted and agentic engineering practices to enhance productivity, ensure correctness, and streamline long-term maintainability.

Key ResponsibilitiesMicroservices & Backend Engineering

• Architect, implement, and operate microservices that deliver:

• Action and variant metadata

• Context-aware policy and eligibility evaluation

• Versioned, read-optimized APIs for high-performance runtime consumption

• Guarantee that services are:

• Highly available, with low latency

• Horizontally scalable for increased demand

• Backward compatible to support safe evolution and upgrades

• Apply industry best practices for API design, schema evolution, service isolation, and secure integration.

Database & Schema Design

• Design, deploy, and maintain resilient database schemas to support:

• Comprehensive action and variant catalogs

• Versioning, lifecycle management, and effective dating

• Rule bindings and complex metadata relationships

• Select and operate appropriate data stores (relational, document, key-value) tailored to workload and scalability requirements.

• Implement and monitor:

• Schema migration and backward compatibility strategies

• Indexing and query optimization for performance

• Data integrity, consistency, and reliability

• Auditability and traceability for compliance and governance

Rules & Policy Engine Integration

• Integrate and manage enterprise-grade rules engines to support:

• Eligibility, constraints, and business policies

• Suppression, cooldowns, exclusions, and other operational guardrails

• Policy-driven allow/deny logic

• Work with technologies such as Drools (DRL/DMN), IBM ODM, DMN-based services, OPA/Rego, or similar.

• Ensure rule execution is deterministic, versioned, stateless, and free from unintended side effects.

AI-Assisted & Agentic Engineering

• Utilize AI-powered and agentic tools to:

• Generate and refactor database schemas and service logic

• Streamline rule authoring, validation, and ongoing refactoring

• Detect and address conflicting or redundant rules early in the development cycle

• Automatically produce comprehensive test cases and explore edge scenarios

• Apply AI responsibly to reduce manual effort while safeguarding clarity, correctness, and strong governance.

Testing, Reliability & Governance

• Develop automated tests for:

• Database migrations and schema changes

• Service-level contracts and API backward compatibility

• Rules behavior, precedence, and edge cases

• Ensure platforms are fully observable and resilient, featuring:

• Structured logging, metrics, and alerting

• Clear error handling, fallback strategies, and robust incident management

• Support audit and compliance requirements through traceable and reproducible system behavior

Collaboration & Technical Leadership

• Work closely with platform, data, and machine learning teams to maintain clean integration points and shared standards.

• Participate actively in architecture and design reviews to uphold platform quality.

• Mentor junior engineers and contribute to technical standards and best practices.

Use your skills to make an impactRequired Qualifications

• Minimum 6 years of experience in backend or platform engineering

• Proven ability to build:

• Microservices and REST/gRPC APIs

• Database-backed systems with complex, evolving schemas

• Deterministic rules or policy-driven platforms

• Direct experience integrating enterprise rules engines (Drools, ODM, DMN, OPA, or similar)

• Strong proficiency in Java and/or Python

• Experience using AI-assisted development tools for increased productivity and accuracy

Preferred Qualifications

• Experience designing versioned schemas and backward-compatible APIs

• Knowledge of high-throughput, low-latency architectures

• Familiarity with systems requiring explainability, auditability, and strong compliance

• Background in regulated or high-compliance domains

Success Metrics

• Action and policy services are stable, performant, and adaptable

• Database schemas facilitate correctness, efficiency, and full audit trails

• Rules execution is deterministic, transparent, and trusted by stakeholders

• AI-assisted tooling reduces development and maintenance cycles

• Platform is widely trusted as a reliable source of truth for downstream consumers

Work Style: Remote/Hybrid - Preferably Boston, MA.

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 subsequently will 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 employees’ 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, “Humana”) 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: 09-29-2026

About us

About Humana: Humana Inc. (NYSE: HUM) is a leading U.S. healthcare company. Through our Humana insurance services and our CenterWell healthcare services, we make it easier for the millions of people we serve to achieve their best health – delivering the care and service they need, when they need it. These efforts are leading to a better quality of life for people with Medicare and Medicaid, families, individuals, military service personnel, and communities at large. Learn more about what we offer atHumana.comand atCenterWell.com.

Equal Opportunity Employer

It is the policy of Humana not to discriminate against any employee or applicant for employment because of race, color, religion, sex, sexual orientation, gender identity, national origin, age, marital status, genetic information, disability or protected veteran status. It is also the policy of Humana to take affirmative action, in compliance with Section 503 of the Rehabilitation Act and VEVRAA, to employ and to advance in employment individuals with disability or protected veteran status, and to base all employment decisions only on valid job requirements. This policy shall apply to all employment actions, including but not limited to recruitment, hiring, upgrading, promotion, transfer, demotion, layoff, recall, termination, rates of pay or other forms of compensation and selection for training, including apprenticeship, at all levels of employment.

Humana complies with all applicable federal civil rights laws and does not discriminate on the basis of race, color, national origin, age, disability, sex, sexual orientation, gender identity or religion. We also provide free language interpreter services. See our https://www.humana.com/legal/accessibility-resources?source=Humana_Website.