API DEVELOPER JOB DESCRIPTION

Building an API is straightforward. Owning one is not. An API Developer is accountable for the full design, construction, and long-term integrity of the service contracts that other teams and systems depend on - spanning REST architecture governance, microservices decomposition, and Agile delivery cycles. In enterprise software environments, this means fielding competing requirements from architects, product owners, and business analysts simultaneously while upholding coding standards, scalability constraints, and security protocols that a Backend Developer or Software Engineer does not formally own. The role demands both the technical depth to lead detailed component-level design and the judgment to spot when a requirement conflicts with the architectural roadmap.

As the API Developer, you will own the design, implementation, and continuous improvement of RESTful services and microservices that power internal and external-facing applications, ensuring each API meets scalability, security, and reliability standards before reaching production. You will work within cross-functional Agile squads, collaborating with architects, business analysts, and product owners across multiple delivery cycles.

Career Impact: Owning end-to-end API design and architectural governance approval at the individual contributor level builds a portfolio that directly qualifies you for Solutions Architect and Lead Engineer roles.

Business Impact: The APIs you deliver become the integration fabric for internal departments and external partners - when they degrade, order processing, data access, and downstream services stall in measurable ways.

Growth Opportunity: Hands-on exposure to microservices strategy, scalability design, and object-oriented architecture across enterprise software environments sharpens the technical judgment required to move into senior or architect-track positions.

• Design and develop RESTful APIs and microservices to meet internal and external integration requirements.
• Architect scalable, secure, and reusable service contracts, including rate limiting, reliability, and monitoring specifications.
• Implement build and deployment automation processes across development, QA, UAT, and production environments.
• Review code written by peers to enforce quality standards, security posture, and adherence to low-level design.
• Collaborate with architects, business analysts, and product owners to translate business requirements into technical solution designs.
• Validate API performance and system stability through unit testing, debugging, and post-deployment verification.
• Produce high-level and component-level design documents that meet architectural governance requirements.
• Monitor deployed services and resolve issues through root-cause analysis and iterative correction.

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent work experience.
• 3 or more years of API development experience, with demonstrated ownership of RESTful service design and delivery.
• Proficiency in at least one object-oriented or server-side language, such as Java or Python, applied in production environments.
• Solid understanding of microservices architecture principles, including decomposition, service governance, and performance tuning.
• Ability to write and execute unit test cases and conduct constructive peer code reviews.
• Familiarity with relational database design, including SQL querying, schema management, and stored procedure concepts.
• Working knowledge of Agile/Scrum methodology and standard version control practices.

• Experience designing and implementing cloud-native services on a major cloud platform, including serverless compute patterns.
• Exposure to API security standards such as OAuth 2.0, OIDC, or PKI certificate-based authentication.
• Demonstrated ability to mentor junior developers or guide a team through system design decisions.
• Prior work in multi-tier enterprise application development involving SOAP services, XML, or legacy integration patterns.

• API defect escape rate, measuring the proportion of bugs reaching production versus caught pre-deployment.
• Mean time to resolution for production incidents attributed to owned services.
• Code review pass rate on first submission, reflecting adherence to design and coding standards.
• Deployment success rate across environment promotions from QA through production.
• API availability percentage against defined uptime targets for services in the production catalog.
• Typical tools: API frameworks (commonly Spring Boot or Node.js); version control and CI/CD (commonly Git, Jenkins, or Azure DevOps).

• Base Salary Range: $95,000 to $135,000 per year depending on seniority and location
• Bonus: Annual performance bonus of 5 to 10 percent of base salary
• Equity: Stock options or RSUs offered at mid-to-senior levels; varies by employer
• Health Benefits: Medical, dental, and vision coverage; employer typically covers 70 to 90 percent of premiums
• PTO: 15 to 20 days annually plus public holidays
• Common Perks: Remote or hybrid work flexibility, professional development budget, and conference attendance support

Figures are estimates based on general US market benchmarks and may be outdated. Adjust based on location, company size, and seniority level.

Employment decisions are made without regard to race, color, religion, sex, national origin, age, disability, genetic information, veteran status, or any other characteristic protected under applicable federal, state, or local law. Candidates requiring a reasonable accommodation during the application or interview process are encouraged to make that request known. Final offers are contingent on the successful completion of a background check. All applicants must be authorized to work in the United States.

The API Developer builds and maintains REST APIs and microservices on Azure, utilizing Azure Functions, API Gateway, and Active Directory to integrate applications across internal departments. Collaborating with Lead Engineers and Architects, the role delivers solutions that translate business requirements into functional systems underpinned by Python, SQL, and Agile development standards.

Key Responsibilities

• Heavy Python development and tools, including Azure SDK.
• Build and maintain REST APIs and microservices architecture.
• Utilize Azure components, including Azure Functions, API Gateway, and Azure Active Directory.
• Develop, modify, configure, and integrate applications for internal departments.
• Devise business logic, procedures, and workflows.
• Perform coding, unit testing, and debugging.
• Develop proof of concept and modify existing programs.
• Analyze and resolve issues.
• Collaborate with Lead Engineers and Architects for complex tasks and system design.
• Interpret business requirements and follow Agile/Scrum methods and development standards.
• Work with relational SQL databases such as Oracle and SQL Server.

Required Qualifications

• Bachelor's degree in Computer Science or related field preferred, Azure Certification a plus.
• 5+ years of software engineering, application development, and/or system integration.
• 2+ years of experience with Python, REST API, RESTful API, Web API, and Git required.
• 1+ year of experience with Azure Functions and API Management preferred.
• 3+ years of experience with web, multi-tier, or object-oriented development.
• Knowledge of Java, .NET, SOAP, JSON, or XML is a plus.
• Knowledge of reading and writing SQL, PL/SQL, and/or T-SQL.
• Knowledge of data storage concepts, including databases, data warehouses, and data lakes.
• NoSQL database experience is a plus.

Embedded within the application support function, the API Developer undertakes maintenance, deployment, and issue resolution across environments to keep services running reliably. Working closely with cross-functional teams, the role ensures appropriate processes are followed and documentation stays current so that operational continuity is sustained across the platform.

Core Functions

• Undertake the provision of application maintenance and support services.
• Identify, investigate, prioritize, and resolve issues quickly and efficiently.
• Perform deployments of application code and configuration across environments.
• Perform post-verification testing following changes in environments.
• Update support documentation to keep information current.
• Ensure appropriate processes are followed.

Qualifications & Experience

• Tertiary qualification in Computer Science, Engineering, or similar, or equivalent experience in Application Support.
• Experience with API, Windows OS, Linux, C#, ASP.NET, and MS SQL.
• Azure experience required, with BizTalk as an advantage.
• Experience in delivering software support services.
• Basic understanding of ITIL key disciplines, including change control and incident management.
• Strong diagnostic and problem-solving skills.
• Excellent attention to detail and analytical thinking.
• Proficiency in PowerShell and Linux scripting, deploying via Octopus, Azure DevOps, or other CI/CD tools.
• Experience managing websites and applications on IIS and understanding authentication through PKI certificates.
• Supportive team player who proactively questions and ensures full understanding of tasks.

Reporting to management, the Chipset API Developer shapes software architecture and API development for WMT applications built on IEEE drafts for WLAN and UWB technologies. Partnering with international R&D teams and stakeholders, the role produces high-quality designs and functional documents that advance product quality across fast-changing requirements.

Primary Duties

• Perform software architecture, design, and development of WMT applications.
• Develop APIs based on IEEE drafts for WLAN and UWB technologies.
• Debug issues related to RF measurements.
• Conduct software development using Agile Scrum methodology.
• Understand requirements from stakeholders and perform feasibility, impact, and performance analysis.
• Review architecture, design, and code to ensure product quality.
• Create and update design and functional documents.
• Collaborate closely with management, stakeholders, and international R&D teams.
• Continuously evaluate design changes and adaptations for fast-changing requirements.

Skills & Qualifications

• Bachelor's or Master's degree in Computer Science, Electronics, or Communications Engineering from a top university.
• 3+ years of experience in WLAN testing and automation development.
• Good RF fundamentals and solid understanding of WLAN standards.
• Knowledge of UWB and Bluetooth is a plus.
• Excellent communication skills.
• Solid analytical, debugging, and problem-solving skills.

Sitting at the intersection of software engineering and enterprise integration, the API Developer designs and develops secure, reusable API services while collaborating with business analysts, architects, and scrum teams to meet customer requirements. Operating across design, development, and testing phases, the role brings industry best practices and thought leadership to deliver modular solutions aligned with organizational strategy.

Duties

• Collaborate with developers, business analysts, and architects to plan, design, develop, and test services, APIs, and web applications.
• Maintain and improve existing applications.
• Configure and maintain build and deployment automation processes.
• Perform ongoing testing and code review to improve software security and stability.
• Understand customer requirements and document application approach and design.
• Monitor and remain current with relevant industry trends.
• Work with design teams to ensure design specifications are implemented.
• Work with product owners and scrum teams to receive assigned tasks and deliver requirements.
• Report daily and weekly status to the project manager and align on plans.
• Design and develop API services that are secure, reusable, and modular.
• Bring industry best practices and thought leadership to implement better processes.

Requirements

• Bachelor's degree or equivalent with 5+ years of experience.
• Preferred experience in the Oil and Gas industry.
• Knowledge of Data Access Layer concepts.
• Knowledge of Java, Core Java, JavaScript, AngularJS, or Node.js.
• Knowledge of microservice strategy, governance, and service performance tuning.
• Team management and mentoring experience.

A key member of a highly skilled engineering team, the Senior API Developer leads the design and implementation of new order processing APIs encompassing scalability, rate limiting, reliability, and monitoring. Collaborating across UI/UX, product ownership, and engineering, the role builds dashboards to track API usage and system performance while promoting best software practices that ensure long-term resiliency.

Technical Responsibilities

• Follow industry best practices to design and develop APIs.
• Take responsibility for complete API design aspects, including scalability, rate limiting, reliability, and monitoring.
• Track API usage and system performance by building dashboards.
• Perform constructive code reviews and write clean code.
• Work independently and guide the engineering team through system design issues.
• Promote best software practices to ensure scalability, testability, maintainability, and resiliency.
• Keep up with the technology landscape and suggest improvements.
• Observe Agile Scrum methodology with a focus on iterative improvements.
• Collaborate with UI/UX designers and product owners.

Professional Experience

• Bachelor's or Master's degree in Engineering or Computer Science, or equivalent experience.
• 5+ years of experience as an API developer.
• Proven experience designing and building robust, scalable, customer-facing APIs.
• Working knowledge of Agile methodologies.
• Strong attention to detail with a passion for building high-performance applications.
• Strong communication and collaboration skills.

Successful data integration across enterprise systems depends on the Mulesoft API Developer, who develops and maintains APIs using Anypoint Studio and MuleSoft-related products within an Agile team. Based within the IT organization and serving as a mentor to junior team members, the role coaches the broader API Developer Community and manages all build aspects from design through UAT and source code management.

Day-to-Day Responsibilities

• Analyze and resolve basic technical issues.
• Develop and maintain APIs using Anypoint Studio and MuleSoft-related products.
• Work with IT Business and IT product owners to refine specifications.
• Use Azure DevOps Work Items and ADO Test Case Management to manage development activities.
• Follow and enhance SRM development best practices.
• Develop estimates and manage all aspects of the build, including design, development, testing, QA, UAT, migration, and source code management.
• Coach and provide general help to the API Developer Community.
• Mentor junior team members.

Technical Qualifications

• MuleSoft Certified Developer - Level 1.
• Ability to design, develop, and deploy APIs using Anypoint Studio.
• Proficiency in Java and JavaScript.
• Strong knowledge of RESTful APIs and RAML Design Concepts.
• Experience with Maven, CI/CD, Munit test cases, and API performance testing.
• Strong knowledge of API security, including OIDC and OAuth 2.0 concepts.
• Experience with automated testing tools, including JMeter and Newman.
• Strong English proficiency.
• Good collaboration and mentoring ability.

As the API Developer, this role designs, implements, and maintains cloud-native applications based on the Spring stack for a global client in the banking industry. The engineering team relies on this work to ensure specifications are followed, services are debugged efficiently, and new technologies are continuously adopted to support delivery lifecycle goals.

Scope of Work

• Design, implement, and maintain cloud-native applications based on the Spring stack.
• Contribute to all phases of the development lifecycle.
• Ensure designs follow specifications.
• Troubleshoot and debug services.
• Work closely with other team members.
• Learn and implement new technologies.

Experience & Qualifications

• Minimum 3 years of commercial programming experience in Java.
• Knowledge of building RESTful services.
• Hands-on experience with Spring Boot, Spring Security, and Spring Data.
• Working knowledge of development tools and processes, including Git, CI/CD, Maven, and Gradle.
• Good English skills, both spoken and written.

API Developer leads high-level and detailed product design, producing end-to-end solution documents and component-level designs that ensure architectural governance approvals are obtained. The work directly supports technology architects and business analysts in translating business requirements into resilient, scalable platform solutions aligned with technical strategy.

Leadership Responsibilities

• Lead the definition of high-level and detailed product design.
• Lead creation and development of the Concept and End-to-End Solution, including Functional and Technical designs, ensuring architectural governance approvals are obtained.
• Design and support implementation of resilient, scalable platform solutions.
• Produce High Level End-to-End Design and Detailed Component Level design documents.
• Develop in-depth awareness of new tools, processes, and technical developments, and apply them proactively.
• Work with technology architects on product strategy and roadmaps.
• Collaborate with business analysts and developers to turn business requirements into solution designs aligned with technical strategy.
• Understand technical constraints and build them into solution design.
• Collaborate and communicate with other developers to build efficient technical solutions.
• Understand requirements and Low Level Design, and adhere to coding standards.

Background & Experience

• Experience in architecting and delivering end-to-end mission-critical applications.
• Strong understanding of software development methodologies, including waterfall and Agile.
• Proficiency in Java, J2EE frameworks including Spring Boot, Java web services, SOAP, and REST APIs.
• Experience with databases, Git, Jira, Confluence, and Jenkins.
• Ability to peer review code, write and execute unit test cases, and code based on low-level designs.
• Good understanding of developer responsibilities in a team environment.
• Awareness of leading-edge tools and techniques.

The API Developer owns the full partner lifecycle experience, advising onboarding Merchant API Partners on technical solutions and troubleshooting integrations with the platform while balancing best practices, regulatory limitations, and an evolving product. Collaborating with Sales and product design teams, the role delivers the best Merchant API Partner experience by translating partner feedback into ongoing product enhancements.

Key Responsibilities

• Advise onboarding Merchant API Partners on technical solutions, balancing best practices, regulatory limitations, and an evolving platform.
• Troubleshoot collaboratively as Merchant API Partners integrate with the platform, guiding them through technical documentation and assessing root causes for errors.
• Manage Merchant Configurations in Merchant Portal, including settings, user setup, pricing, and API key issuance.
• Serve as primary owner of Merchant API Partner experience, including escalation and resolution of issues.
• Collaborate with Sales to support new API Partner opportunities and manage existing API Partner relationships.
• Provide feedback to product design and development teams based on Merchant API Partner experience.
• Document process, product, and industry learnings to identify pain points and trends to help the team grow and improve.

Required Qualifications

• Bachelor's degree preferred, or equivalent combination of education and experience.
• 5+ years of experience in a customer-facing technical role such as sales engineering, implementation, or technical account management.
• Experience in the B2B technology space.
• Strong understanding of financial services, including point-of-sale and subscription financing models.
• Superior ability to communicate complex technical concepts clearly both verbally and in writing.
• Experience coding to APIs, with technical skills including HTTP requests, JSON, XML, mobile platforms, and API tools such as Postman.
• Resourceful problem solver with the ability to manage and deliver multiple projects simultaneously.

Embedded within a skilled team of data and API engineers, the API Developer builds Node.js and Spring Boot microservices and designs scalable AWS infrastructure to integrate financial and life insurance data across diverse business units. Working closely with product managers, business analysts, and designers in an Agile environment, the role delivers enterprise data science and analytics capabilities that connect web services across the organization.

Core Functions

• Work closely with a team of skilled data and API engineers to connect and integrate web services across the enterprise.
• Build Node.js and Spring Boot-based microservices.
• Implement AWS cloud-based infrastructure systems to support continuous delivery and integration pipelines using Docker, Docker Swarm, Jenkins, and Kubernetes.
• Design and build scalable infrastructure using serverless components such as AWS Lambda.
• Operate infrastructure systems to support enterprise data science and analytics capabilities, including Kafka, Spark Streaming, and Snowplow.
• Work in an Agile environment with engineers, product managers, business analysts, and designers to understand end-user requirements.
• Support built systems, including monitoring, performance tuning, and incident response.

Qualifications & Experience

• Bachelor's degree required, graduate degree is a plus.
• 5+ years of experience with full-stack development, including application, API, testing, and automation, with 7+ years preferred.
• Strong experience developing RESTful APIs and microservices.
• 2+ years of experience with UI frameworks, including React, Angular, and JavaScript.
• Advanced proficiency in Node.js and open source web application frameworks.
• Experience with SQL for database schema design, including Vertica and Postgres, and advanced database design and administration.
• Experience with unit test frameworks, CI/CD tools such as Jenkins, TeamCity, or GoCD.
• Superior communication skills and ability to collaborate effectively with business partners.