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  • Senior Software Engineer - Java/SQL/API

     .... We provide the resources to enable and develop our innovative I.T. professionals in a variety...  ...applications. You will collaborate with senior engineers and business partners to...  ...native technologiesExperience with RESTful API design, development, integration, and troubleshootingExperience... 
    Senior
    Local area
    Immediate start
    Work from home

    Enterprise Mobility Inc

    Saint Louis, MO
    5 days ago

  • Senior Software Engineer, Operations

     ...value to Sun Life. We are looking for a Senior Software Engineer who thrives in high-impact...  ...and frameworks such as SOAP, REST API, Java APIs, JSON, Spring BootDatabase technologies...  ...with AI Ops capabilities, experience developing / implementing AI based tools is an added... 
    Senior
    Full time
    Work at office
    Work from home

    Sun Life Financial

    Waterloo, IL
    1 day ago

  • Senior Software Engineer

    $113k - $163k

    We are looking for a Senior Software Engineer to join our Affinity Life technology team. In this hands-on role, you will design, develop, modernize, and support mission-critical enterprise applications...  ...evolve critical applications through API integration, automation, DevOps... 
    Senior
    Full time
    Temporary work
    Local area
    Flexible hours

    John Hancock

    Waterloo, IL
    13 hours ago

  • Senior Software Engineer

    $142k - $158k

     ...is a requirement for this role.Job title: Senior Software EngineerWhat your day-to-day...  ...business to iterate over software requirements· Develop tools and applications by producing clean...  ...MySQL)· Solid experience writing RESTful API endpoints· Absolutely love TDD and have... 
    Senior
    Full time
    Work at office
    Remote work
    Flexible hours

    PointClickCare

    Waterloo, IL
    1 day ago

  • Senior Full Stack Engineer

    $113k - $163k

    As a Senior Full Stack Engineer, you will help shape solutions, advance strategic initiatives...  ....Position Responsibilities: Design, develop, test, deliver, maintain and continuously...  .... Design end-user interfaces, databases, APIs and server-side logic while maintaining front... 
    Senior
    Full time
    Temporary work
    Local area
    Flexible hours

    John Hancock

    Waterloo, IL
    13 hours ago

  • Senior Full-Stack Software Engineer

    $96.6k - $179.4k

     ...our technology team, you will mentor agile engineering squads to develop and deliver transformative and impactful digital solutions to...  ...or integrating AI agents and agentic workflows that use tools, APIs, enterprise data, or retrieval-augmented generationFamiliarity with... 
    Senior
    Full time
    Temporary work
    Local area
    Flexible hours

    John Hancock

    Waterloo, IL
    1 day ago

  • Remote-First Senior Platform Engineer (Cloud & APIs)

     ...A global consulting firm seeks a Senior Application Designer and Developer to support clients in business transformation through technology. You will analyze, design, and deploy robust software applications, working closely with stakeholders to deliver innovative solutions... 
    Senior
    Remote work

    EY

    Saint Louis, MO
    4 days ago

  • Senior Cloud Engineer -Hybrid

    $107.45k - $199.55k

     ...modern cloud solutions? We're looking for a Senior Cloud Engineer who can combine deep...  ...efficient solutions.What You'll DoDesign, develop, and implement cloud-based applications and...  ...Infrastructure-as-Code practices.Develop and maintain APIs, web services, and integration solutions... 
    Senior
    Full time
    Temporary work
    Local area
    Flexible hours

    John Hancock

    Waterloo, IL
    3 days ago

  • Senior Full-Stack AI Engineer

    $113k - $163k

    As a Senior AI Engineer, you will be responsible for Full-Stack Software Development i.e.building...  ....Full-Stack Engineering & DeliveryDesign, develop, test, and maintain full-stack applications including user interfaces, APIs, backend services, and integration layers for... 
    Senior
    Full time
    Temporary work
    Local area
    Flexible hours

    John Hancock

    Waterloo, IL
    4 days ago

  • Senior Software Engineer, Operations - Core Java & iOS focus

     ...within Application Operations Support (AOS) develops and supports IT applications with a focus...  ...value to Sun Life.We are looking for a Senior Software Engineer with strong full-stack...  ...reliable applications across the web, mobile, API, and middleware layers while... 
    Senior
    Full time
    Work at office

    Sun Life Financial

    Waterloo, IL
    1 day ago

  • Senior COTS Developer for BI & Data Integration

     ...CACI International Inc. in St. Louis, MO seeks an experienced Senior COTS Developer to design, develop, and maintain COTS-based software for NGA...  ...years of relevant experience), and 10+ years in COTS development tools with API and data-migration experience. #J-18808-Ljbffr
    Senior

    Fortescue Metals Group

    Saint Louis, MO
    1 day ago

  • Senior Security Platform Developer, Security Automation (Python, Splunk SOAR)

     ...cryptographic security, and other security platforms, the team develops solutions using Splunk SOAR, Python, APIs, and related technologies. Our automation helps...  ...deployment and configuration of new systems.Act as a senior technical escalation point for the automation... 
    Senior
    Full time
    Work at office
    Work from home

    Sun Life Financial

    Waterloo, IL
    4 days ago

  • Senior Software Engineer: GIS & Microservices (Onsite)

     ...Freedom Technology Solutions Group is seeking a Senior Software Engineer to join our on-site team in St. Louis, MO. You will lead design and development of web services, microservices, APIs, and geospatial data processing, collaborating closely with clients and stakeholders... 
    Senior

    (EDO) Entertainment Data Oracle, Inc.

    Saint Louis, MO
    3 days ago

  • Senior Ansible & DevOps Engineer (Onsite - St. Louis)

     ...Vertex Elite LLC is seeking a Senior Automation Engineer specializing in Ansible & DevOps to join our team in St. Louis, MO. The role...  ...expertise, strong Python and Linux scripting, and experience with API integrations. This onsite position requires USC or valid USA work... 
    Senior
    Full time

    Vertex Elite LLC

    Saint Louis, MO
    1 day ago

  • Senior Solutions Engineer (Client-Facing)

     ...complexity. The Role Were looking for a senior engineer who can operate confidently in...  ...goals into clear execution plans for developers. This is not a pure coding role. Its...  ...systems including web applications, APIs, cloud infrastructure, and mobile products... 
    Senior
    Full time
    Part time
    For contractors
    Remote work

    WW Corporate

    Saint Louis, MO
    2 days ago

  • Sr. Software Developer

    $98.08k - $147.12k

     ...enterprise with the people and systems that need it.Your ImpactAs a Senior Software Developer, you will be a key contributor to OpenText’s cloud &on-prem...  ...in Java/J2EE, Spring Web Services, and SOAP/REST APIs.Experience in web development using JavaScript, HTML, CSS,... 
    Senior

    OpenText

    Waterloo, IL
    3 days ago

  • Senior Network Software Engineer

    $87.1k - $157.45k

     ...Engineer located in the Scott AFB, IL area. The Senior Network Software Engineer will support...  ...development experience looking to develop and expand their abilities and showcase their...  ...experience that includes REST api development, as well as the parsing, generation... 
    Senior
    Full time
    Contract work

    Leidos

    O Fallon, IL
    3 days ago

  • Senior Solutions Engineer - Midwest

    $170k - $215k

     ...customers. Design customized technical solutions based on client needs, often involving product configuration, integration planning, and API usage. Collaborate with product and engineering teams to validate feasibility or elevate edge-case needs. Produce architecture... 
    Senior
    Flexible hours

    DigiCert

    Saint Louis, MO
    3 days ago

  • Senior .NET Engineer Remote with Profit Sharing

     ...leading technology company is seeking a Senior Software Engineer specializing in .NET to...  ...their dynamic remote team. The role involves developing integrations and services for their...  ...Candidates with a robust background in C#, APIs, and a passion for solving complex challenges... 
    Senior
    Remote work

    SherlockTalent

    Sunset Hills, MO
    1 day ago

  • Senior AI Platform Engineer: Production-Ready AI & Automation

     ...Technology Partners, Inc. in St. Louis is seeking a Senior AI Platform Engineer to build and support production-ready AI capabilities,...  ...collaborate with a senior team to connect AI with existing applications, APIs, and business processes, ensuring reliability, testability, and... 
    Senior

    Technology Partners

    Saint Louis, MO
    3 days ago

  • .NET Developer - mid-to-senior

     ...Mid-To-Senior .NET DeveloperWe're hiring a mid-to-senior.NET Developer for an onsite contract role in St. Louis. The right candidate is comfortable across the full...  ...stackIntegrate with internal systems and third-party APIs as neededWhere applicable, support or extend... 
    Senior
    Contract work

    The Timberline Group Company

    Saint Louis, MO
    1 day ago

  • Sr. AI Developer

    $110.96k - $160.96k

     ...technology that helps teams innovate faster.Your Impact:As a Senior AI Developer, you will bring software engineering experience and a working...  ...applications. You have written and reviewed code, integrated APIs or distributed services, and worked with authentication, permissions... 
    Senior
    Local area

    OpenText

    Waterloo, IL
    3 days ago

  • Senior AI Software Engineer-TS/SCI clearances (CI poly preferred)

     ...Senior AI Software EngineerCredence has an immediate need for a Senior AI Software Engineer...  ...contributor responsible for designing, developing, and deploying advanced AI-driven solutions...  ..., prompt/context engineering, and secure API integrations.Own end-to-end agentic AI... 
    Senior
    Immediate start

    Credence company

    Saint Louis, MO
    5 days ago

  • Senior Java Developer

     ...(and their families if needed) We are seeking three mid-to-senior level Java Developers to join a cloud-native engineering team building high-scale...  ...Develop cloud-native applications using GCP services Build APIs and backend services that integrate with Cloud SQL, PostgreSQL... 
    Senior
    Contract work
    Remote work
    3 days per week

    Agile Resources Inc

    Saint Louis, MO
    4 days ago

  • Senior Tech Mobile Agentic AI Developer

     ...Role Summary We are looking for a skilled AI/ML Developer to join our agentic platform team on a contractual basis. You will design, develop...  ...Rank Fusion - Implement tool-calling agents with parallel API execution, sequential enrichment chains, and summarization -... 
    Senior

    Salesforce

    Saint Louis, MO
    4 days ago

  • Senior Backend & Cloud Solutions Architect

     ...Senior Solutions ArchitectWe are looking for a Senior Solutions Architect to lead the technical design and evolution of a high-traffic...  ...architecture including Node.js BFF and Go-based microservicesDefine API contracts (OpenAPI/Swagger) and establish architectural and... 
    Senior

    The Giant Bullseye

    Saint Louis, MO
    4 days ago

  • STARLIMS Sr. Developer

     ...in STARLIMS QM v12 is mandatory Knowledge & work experience in developing maintaining STARLIMS on PaaS solutions (AWS) is desirable Ability...  ...system Knowledge and work experience with STARLIMS DCUs REST APIs Knowledge and work experience instrument integration with STARLIMS... 
    Senior
    Work experience placement

    TechDigital Group

    Saint Louis, MO
    3 days ago

  • Senior AI Engineer (Java)

     ...ITTConnect is seeking an experienced Senior AI Engineer (JAVA) to work for a client...  .... Key Responsibilities: Design and develop scalable backend applications and services...  ...and distributed services using Kafka, REST APIs, and microservices architecture. Integrate... 
    Senior

    ITTConnect

    Saint Louis, MO
    2 days ago

  • Senior Software Engineer - Backend

     ...: Kforce's client is looking to add a Senior Software Engineer to their team. This role...  ...Product, QA, and Engineering teams to develop solutions that support complex business logic...  ...* Build and optimize high-performance APIs and services focused on scalability and reliability... 
    Senior
    Hourly pay
    Contract work

    Kforce Technology Staffing

    Saint Louis, MO
    3 days ago

  • Senior UI/UX Engineer

    $107.9k - $195.05k

     ...Candidate We're looking for someone who is more than a front-end developer. You are passionate about how technology feels and functions...  ...tooling. Experience developing or consuming RESTful APIs and integrating UI applications with backend services. Experience... 
    Senior
    Contract work
    Local area
    Immediate start

    Leidos

    Dupo, IL
    4 days ago