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Senior Java Engineer Jobs in Columbia, MO (NOW HIRING)

ATTAINX INC

Senior Software Developer - 100% Remote

Columbia, MO · Remote

$55 - $65/hr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Senior Software Developer (Software / Applications) Location: 100% Remote Clearance: Must be a US ... Knowledge of backend technologies (e.g., Java, .NET, Python). * Certifications in cloud ...

New

ProducePay

Senior Software Engineer - Backend

California, MO · On-site

$140 - $193/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

As a Senior Software Engineer on the Equipment Monitoring team, you will build the backend systems ... Proficiency in Ruby, Golang, Kotlin/Java is a plus. * Experience with Relational and NoSQL ...

ATTAINX INC

Senior Software Developer - 100% Remote

Columbia, MO · Remote

$55 - $65/hr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Senior Software Developer (Software / Applications) Location: 100% Remote Clearance: Must be a US ... Knowledge of backend technologies (e.g., Java, .NET, Python). * Certifications in cloud ...

New

Jobtailor

Distinguished AI Engineer

California, MO · On-site

$180 - $240/hr

Serve as a senior hands‑on contributor, technical leader, and subject matter expert across the AI ... Experience designing, developing, and maintaining software solutions using Python, Java, or ...

Jobtailor

Staff Engineer - FinOps

California, MO · On-site

$140 - $190/hr

Serving as a role model and mentor to senior and junior engineers, guiding them in system ... Cloud Architecture * Java * TypeScript * ReactJS * Kubernetes * Terraform Soft Skills

New

Jobtailor

Senior Security Engineer

California, MO · On-site

$120 - $180/hr

Strong proficiency in at least one programming or scripting language (e.g., Python, Go, Java, or similar) and experience using code to automate security controls or detection. * Direct experience ...

Jobtailor

Senior Staff ML Engineer

California, MO · On-site

$180 - $230/hr

Proficient in Python, Java or similar general-purpose programming languages. * Bachelor's degree or above in Computer Science, Engineering, Statistics or a related field. Core Competencies ...

Visa Hunt

Senior Android Engineer, iRAD

California, MO · On-site

$196 - $230/hr

  • Medical

  • Life

  • Retirement

  • PTO

As a Senior Android Engineer on iRAD , you would build and evolve high-impact mobile experiences ... Proficiency with Kotlin and/or Java, and a strong grasp of Android SDK and architecture patterns ...

New

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Senior Java Engineer information

See Columbia, MO salary details

$10

$59

$82

How much do senior java engineer jobs pay per hour?

As of Aug 19, 2026, the average hourly pay for senior java engineer in Columbia, MO is $59.79, according to ZipRecruiter salary data. Most workers in this role earn between $52.40 and $66.78 per hour, depending on experience, location, and employer.

What is a senior Java engineer?

Senior Java Engineers are experienced software developers who specialize in designing, developing, and maintaining applications using the Java programming language. They often lead development teams, architect solutions, and ensure that software meets both technical and business requirements. Their responsibilities also include code reviews, mentoring junior developers, and optimizing application performance. Typically, they have several years of experience and a deep understanding of Java frameworks and best practices.

What are the key skills and qualifications needed to thrive as a senior Java engineer?

To thrive as a Senior Java Engineer, you need advanced proficiency in Java programming, strong knowledge of software design patterns, and a degree in computer science or related field. Experience with frameworks like Spring, Hibernate, build tools such as Maven or Gradle, and familiarity with cloud platforms and CI/CD systems are typically required. Excellent problem-solving abilities, leadership, and effective communication help you guide teams and collaborate with stakeholders. These skills are crucial for delivering robust, scalable software solutions and mentoring junior engineers in complex development environments.

What are some common challenges senior Java engineers face when working on large-scale enterprise applications?

Senior Java Engineers often encounter challenges such as managing complex codebases, ensuring application scalability, and maintaining high performance under heavy loads. They are also responsible for implementing robust security practices and integrating new technologies without disrupting existing systems. Effective collaboration with cross-functional teams and mentoring junior developers are crucial aspects of the role, as these responsibilities help maintain code quality and project momentum.

What is the difference between Senior Java Engineer vs Java Developer?

AspectSenior Java EngineerJava Developer
Required CredentialsBachelor's in Computer Science, Java certifications (e.g., Oracle Certified Professional)Bachelor's in Computer Science or related field, Java certifications optional
Work EnvironmentDesigning, developing, and maintaining complex Java applications, often in team leadership rolesDeveloping Java applications, focusing on coding and implementation
Industry UsageUsed across finance, tech, and enterprise sectors for large-scale projectsCommonly employed in software development firms, startups, and tech companies

While both roles involve Java programming, Senior Java Engineers typically handle complex system design, mentorship, and project leadership, whereas Java Developers focus more on coding and implementing features. The senior role often requires more experience and certifications, with a broader scope of responsibilities.

What cities near Columbia, MO are hiring for Senior Java Engineer jobs?

Cities near Columbia, MO with the most Senior Java Engineer job openings:

Senior Java Engineer jobs near you
Infographic showing various Senior Java Engineer job openings in Columbia, MO as of August 2026, with employment types broken down into 87% Full Time, 8% Part Time, and 5% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution, with an average salary of $124,356 per year, or $59.8 per hour.

Senior Software Engineer - Back End

Jobtailor

California, MO • On-site

$140 - $190/hr

Other

Posted 14 days ago

Job description

  • Own the payments domain end to end on the kiosk platform: authorize, capture, void, refund, reversal, settlement (EOD), and reconciliation.
  • Re-architect the platform into a pluggable payment SDK: design the plugin contract and lifecycle (discovery/registration, versioning and backward compatibility, capability negotiation, dependency isolation, per-integration configuration and secrets) on top of the existing PayTerminal SPI.
  • Design a terminal abstraction that cleanly spans integrated vs. semi-integrated vs. cloud/REST processors and cash devices, so callers code to one model regardless of transport or vendor.
  • Build the integration test and certification harness (extending the current mock-terminal approach) so a new or external integration can be validated, simulated, and regression-tested before it touches real hardware.
  • Set platform-wide patterns for correctness in money movement: idempotency, transaction recovery and reversal, timeouts, heartbeat/health, concurrency, and reconciliation, in a system where double-charges and dropped captures are unacceptable.
  • Design for PCI-DSS scope minimization: tokenization, P2PE, per-processor TLS/mTLS and certificate/key handling, so cardholder data stays out of in-scope services. Partner with security/QSA on audits.
  • Drive architecture and design reviews, set technical direction for the integration layer, and mentor engineers building integrations.
  • Implement new terminal integrations end to end, from byte-level protocol (framing, TLV/BMP/APDU, BCD/LLVAR, checksums, ACK/NAK state machines) up to the high-level PayTerminal API.
  • Work directly with serial (RS-232 / USB-serial via jssc) and USB (usb4java) transports: port handling, event-driven reads, reconnection, and timing.
  • Integrate high-level and cloud processor APIs (REST/SOAP, webhooks, semi-integrated terminal SDKs) with robust retry, polling, and reconciliation.
  • Debug live hardware: protocol traces, terminal logs, packet captures, and vendor certification cycles.
Requirements
  • 6+ years back-end engineering with strong Java (the platform is multi-module Maven/Java on Spring) and solid OOP and distributed-systems design.
  • Demonstrated experience designing extensible / plugin / SPI-based architectures (ServiceLoader, OSGi, Spring plugin models, or public SDKs consumed by other teams or third parties).
  • Hands‑on low‑level device and protocol experience: serial and/or USB communication and binary protocol implementation (TLV, BCD, bitmaps, length‑prefixed fields, state machines). EMV, ISO 8583, ZVT, or OPI a strong plus.
  • Direct payment‑terminal / POS integration experience (Verifone, Ingenico, Adyen, Shift4, FreedomPay, SIX, Nepting, SiTef, Redsys, Worldpay, or comparable), and a clear understanding of integrated vs. semi-integrated models.
  • Solid grasp of the card transaction lifecycle (auth, capture, void, refund, settlement, reversal) and PCI‑DSS boundaries, tokenization, and TLS/mTLS in production.
  • Track record of technical leadership: leading designs, setting standards, and mentoring engineers.
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