Software Engineer, Apps

WEX

. Engineer and implement software solutions tailored for the iSeries environment .

Posted 11/6/2026full-timeRemote • United StatesSeniorLead💰 $140,600 - $173,100 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and implementing scalable software solutions for the iSeries environment, with a strong focus on backend development using Java, RESTful APIs, and cloud-native architectures. Proven ability to lead design decisions, mentor engineers, and drive cross-team projects while ensuring compliance with security standards.

Highest-signal resume keywords

Java Backend DevelopmentISeries Technologies ExpertiseRESTful API DevelopmentScalability and Reliability DesignCloud-Native Architecture Familiarity

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Object-Oriented DesignData Structures and AlgorithmsSQLSpringBootRPG IIIRPGILERPG IVDB2 DatabasesEvent-Driven ArchitectureKafka

Soft Skills

Excellent Communication SkillsCollaborative MindsetEmpathetic Approach

Tools & Technologies

DockerKubernetesIBM iSeriesSOAPPHPTCP/IPSSLSSHContinuous IntegrationPerformance Testing

Certifications & Qualifications

Bachelor’s Degree in Computer ScienceMaster’s Degree in Computer Science (Preferred)

Industry Keywords

PCI DSS ComplianceCard PaymentsWeb ServicesChange ManagementIncident Resolution

Tech Stack

Tools & technologies

CloudDockerGRPCJavaKafkaKubernetesPHPSOAPSpring BootSpringBootSQLTCP/IPC++.NET

About the role

Key responsibilities & impact

Engineer and implement software solutions tailored for the iSeries environment
Design, develop, and maintain robust, scalable, and high-performance object-oriented backend code
Develop public REST APIs using Java and internal gRPC APIs
Craft system designs, lead design decisions, and drive alignment with senior engineers
Write automated unit, integration, end-to-end, concurrency, and load/performance tests
Analyze existing systems to identify bottlenecks and technical debt and implement scalability and stability improvements
Implement automation for testing, monitoring, healing, and scaling applications, including continuous integration and deployment
Collaborate with product managers, designers, engineers, stakeholders, and large customers to define and implement features
Conduct code reviews and mentor junior and mid-level engineers
Troubleshoot complex issues, devise fixes, author root cause analysis documents, and improve reliability
Analyze competing technologies and advise on technology solutions
Maintain design documentation, run books, change management documents, and readiness plans
Provide live-site support for production applications and drive incident resolution
Drive cross-team projects as a single-threaded owner or tech lead and unblock engineers
Support Mobility major account implementations on the IBM iSeries platform

Requirements

What you’ll need

Bachelor’s degree in Computer Science or Software Engineering
10+ years of professional experience in software engineering
Strong understanding of data structures and algorithms, object-oriented design, and problem-solving
Expertise in designing and developing internet-scale services with scalability, availability, security, and reliability design tenets
Proficiency in backend development, Java or C#, SpringBoot, RESTful APIs, ODATA framework, and SQL
10+ years deep technical knowledge of iSeries technologies, including RPG III, RPGILE, RPG IV, RPG400, CLP, C++, DDS, IBM Utilities, SOAP, PHP, .NET, web services and DB2 databases
IBM iSeries communications, administration, SSL, SSH, TCP/IP, and web services experience
Preferred: Master’s degree in computer science or software engineering
Preferred: 8 years of experience in software engineering
Experience with event-driven architecture and Kafka
Experience working on card payments
Familiarity with cloud-native architecture, Docker, and Kubernetes
Awareness of API security and PCI DSS compliance requirements
Ability to work on existing codebase, contribute improvements, and adapt to legacy systems’ constraints
Excellent written and verbal communication skills, and a collaborative and empathetic mindset

Benefits

Comp & perks

health, dental and vision insurances
retirement savings plan
paid time off
health savings account
flexible spending accounts
life insurance
disability insurance
tuition reimbursement
quarterly or annual bonus eligibility for non-sales roles