Senior Backend Engineer

Media, Pennsylvania, USPosted Yesterday

Role Overview

Mondo is hiring a Senior Backend Engineer. This is a contract hybrid role, based in Media. Part of Mondo's Backend hiring, posted yesterday. Full responsibilities, required qualifications, and the apply link are listed in the description below.

Salary Context

Salary is not disclosed in this posting. Market median for Senior-level Backend roles is $170k-$216k (based on 17 comparable listings). Many employers share specifics during the interview process or after an initial screen.

Resume Keywords to Include

Make sure these keywords appear in your resume to improve ATS scoring

JavaGoSpringAWSDockerKubernetesPostgreSQLMongoDB

Job Description

Apply now: Senior Backend Software Engineer (Java/Go), Hybrid - Onsite 4 Days/Week. Start date is ASAP for this Contract position.

Job Title: Senior Backend Software Engineer (Java/Go)

Location-Type: Hybrid - Onsite 4 Days/Week, Remote Fridays - Philadelphia, PA

Start Date: ASAP

Duration: Until end of 2026

Compensation Range: $90-105/hr W2

Benefits: Eligible for Health, Dental, Vision, and 401K

Visa Sponsorship: Not eligible for visa sponsorship

Job Description

The client is seeking a Senior Backend Software Engineer to design, develop, and maintain scalable backend microservices and event-driven systems that power critical product functionality across the organization.

Job Summary

Design, develop, and maintain backend microservices using Java/Spring Boot and Go

Build and support high-performance RESTful APIs and distributed services

Develop and maintain event-driven architectures utilizing Kafka and similar messaging platforms

Work within containerized, cloud-native environments using Docker and Kubernetes

Collaborate across engineering teams while maintaining ownership of assigned workstreams

Leverage AI-powered development tools such as GitHub Copilot and Claude to accelerate delivery

Troubleshoot complex production issues and drive resolution through root cause analysis

Minimum Requirements:

7 years of backend software engineering experience

Strong hands-on experience with Java, Spring Boot, and Go (Golang)

Proven experience designing and building RESTful APIs and distributed systems

Experience with Kafka or comparable event-driven messaging platforms (JMS, RabbitMQ)

Strong experience with Docker and Kubernetes in cloud-native environments

Experience with one or more of the following databases: PostgreSQL, MongoDB, or Couchbase

Demonstrated ability to independently ramp on complex systems and deliver results with minimal oversight

Preferred Qualifications

Experience with performance and load testing tools such as K6

Experience implementing BDD frameworks, including Cucumber

Familiarity with Istio, AWS EKS, or AWS MSK

Background in startup or smaller-company environments where engineers owned multiple responsibilities

Exposure to service mesh architectures and operating large-scale cloud-native applications

About Mondo

Mondo

mondo.com

BackendHybrid

7 other open roles at Mondo on TryApplyNow.

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Frequently Asked Questions

How do I apply for the Senior Backend Engineer position at Mondo?

Use the Apply button above to submit your application directly to Mondo. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Is the Senior Backend Engineer role at Mondo remote or in-office?

This is a hybrid role based in Media. Expect a mix of in-office and remote days, with the specific cadence set by the hiring manager.

What does a Senior Backend Engineer at Mondo earn?

Mondo has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Senior Backend Engineer role at Mondo posted?

This role was posted on June 25, 2026 (yesterday). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

How much experience does the Senior Backend Engineer role at Mondo require?

This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. Mondo lists their specific requirements in the description below, so review the must-have qualifications closely before applying.

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