Senior Java Developer — Enterprise API Integrations

Openkrill

United States

Remote

USD 140,000 - 150,000

Full time

14 days+

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Benefits offered by this job

Health Insurance

Dental Insurance

Vision Insurance

401(k) with company matching

Paid time off

7 Paid company holidays

4 Floating holidays per-year

Life Insurance and AD&D

Job summary

ABC Legal Services is seeking a Senior Java Developer to expand the Enterprise team's capacity for high-impact integrations. You will design, build, and support APIs and integration services that connect our platform with customers, partners, vendors, and internal products.

You will work on public-facing APIs and the backend services that support them. This is an opportunity for a senior engineer who translates complex business workflows into dependable, well-designed integrations across Java

Qualifications

7+ years of professional software development experience with strong Java production experience.
Strong experience designing and implementing REST APIs and system integrations.
Experience with Spring/Spring Boot, DI, security, and SOA architecture.
Strong API security concepts (OAuth 2.0, token-based auth, secrets management).
Relational databases (SQL), data modeling, indexing, migrations.
Experience with asynchronous/event-driven processing patterns.
Experience with a business-rules engine (e.g., Drools) or ability to learn.
Strong automated testing: unit & integration tests for APIs, logic, data access.
Familiar with AI development tools (Codex/Claude) in engineering workflows.
Ability to analyze ambiguous requirements and communicate tradeoffs clearly.

Responsibilities

Design, build, and maintain RESTful APIs used by customers, partners, and internal systems.
Extend and support APIs for future integration projects with customers, vendors, and partners.
Develop secure machine-to-machine integrations, including authentication and API versioning.
Build resilient integrations with inbound/outbound processing, webhooks, and document exchange.
Design event-driven workflows with durable processing, retries, and audit history.
Work with SQL databases, data modeling, transactions, and persistence frameworks like MyBatis.
Implement business rules in Java and a rules engine; keep behavior testable and safe.
Collaborate with product, operations, and external technical contacts to deliver solutions.
Investigate production issues, identify root causes, and deploy durable fixes.
Contribute to design, code reviews, testing, and API/integration documentation.
Use AI tools thoughtfully to improve speed, investigation, documentation, and code quality.

Skills

Java fundamentals

REST APIs

Spring/Spring Boot

API security

SQL databases

Asynchronous processing

Drools/rules engines

Automated testing

AI development tools

Requirements analysis

Legacy & modern codebases

Education

Bachelor's Degree in a Technical Field

Tools

Apache ActiveMQ

MyBatis

OpenAPI/Swagger

Codex

Claude

Job description

About ABC Legal Services:

ABC Legal Services is proud to be the national leader in service of process. We are a team of 1000 and growing with offices in Los Angeles, Oklahoma City, Phoenix, Brooklyn, Chicago, Washington DC, and more. Seattle is our home and headquarters. We’ve been successful in this unique business for over 30 years and we continue to advance our technology and business processes to remain years ahead of what our competition is able to offer. Our focus is to expand our technology lead, acquire and integrate less efficient competitors, and tap into new segments through an integrated inbound marketing and sales approach.

Job Overview:

ABC Legal is seeking a Senior Java Developer to help expand the Enterprise team’s capacity for high-impact customer and partner integrations. This role is centered on designing, building, and supporting reliable APIs and integration services that connect our platform with customers, partners, vendors, and internal products.

You will work on our public-facing APIs and the backend services that support them. This is an opportunity for a senior engineer who enjoys translating complex business workflows into dependable, well-designed integrations. The work spans Java services, REST contracts, database persistence, security, event processing, and business rules.

What you’ll do

Design, build, and maintain RESTful APIs used by customers, partners, and internal systems.
Extend and support our APIs with the functionality needed for future customer, vendor, and partner integration projects.
Develop secure machine-to-machine integrations, including authentication, authorization, API versioning, OpenAPI documentation, and role-based access controls.
Build resilient integrations that handle inbound requests, outbound status updates, webhooks, document exchange, and asynchronous processing.
Design reliable event-driven workflows using durable processing, retries, idempotency, rate limiting, audit history, and failure recovery.
Work with relational databases, including SQL, data modeling, query troubleshooting, indexes, transactions, schema migrations, and persistence frameworks such as MyBatis.
Implement and maintain business behavior in Java and Drools rules, keeping rules and service-layer behavior understandable, testable, and safe.
Collaborate with product, operations, customer-facing teams, and external technical contacts to turn integration requirements into maintainable technical solutions.
Investigate production issues across application code, integrations, rules, and data; identify root causes and deliver durable fixes.
Contribute to technical design, code reviews, automated testing, and API/integration documentation.
Use AI-assisted development tools, such as Codex and Claude, thoughtfully to improve development speed, investigation, documentation, and code quality.

What we’re looking for

The ideal candidate combines strong Java fundamentals with practical integration experience: someone who can build a clear API contract, trace a workflow through database and rules layers, and deliver solutions that customers and partner systems can rely on.

Bachelor's Degree in a Technical Field (e.g., Computer Science, Electrical Engineering, or related discipline)
7+ years of professional software-development experience, with strong production Java experience.
Strong experience designing and implementing REST APIs and system integrations.
Experience with Spring or Spring Boot, dependency injection, security, and service-oriented application architecture.
Strong understanding of API security concepts, including OAuth 2.0, token-based authentication, authorization, secrets management, and secure handling of external payloads.
Experience integrating with third-party APIs and managing real-world concerns such as incomplete documentation, retries, rate limits, duplicate events, partial failures, and evolving contracts.
Solid relational database experience, including SQL, data modeling, query troubleshooting, indexes, transactions, and schema migrations.
Experience with asynchronous or event-driven processing patterns, including Apache ActiveMQ, message queues, background workers, webhooks, scheduled processing, or durable outbox patterns.
Experience with Drools or another business-rules engine, or a demonstrated ability to learn and work effectively with rules-based systems.
Strong automated-testing discipline, including unit and integration tests for APIs, business logic, and data access.
Experience with or willingness to adopt AI development tools such as Codex and Claude as part of an effective engineering workflow.
Ability to independently analyze ambiguous requirements, make sound technical decisions, and communicate tradeoffs clearly.
Comfort working in a large, established codebase that combines modern and legacy technologies.

We know that a company's success starts with its employees. We also know that an individual's success starts with the right career opportunity. Join our team today!