Senior Backend Software Engineer
$65 - $70 per hourAddison Group
Job Title: Senior Backend Software Engineer Location: Remote Employment Type: Contract Pay Rate : $65 - $70/ hour Benefits: This position is eligible for medical, dental, vision, and 401(k). The Role We are seeking a Senior Software Engineer to play a pivotal role in transforming a core financial product. Key Responsibilities Lead the development, testing, and delivery of reliable backend services Help define and evolve the system architecture in a service-oriented environment Translate complex business requirements into scalable technical solutions Deliver high-availability, high-scalability services in a cloud-native environment Mentor peers and foster a strong engineering culture Drive innovation through new ideas and continuous improvements Work closely with product and design teams throughout the product lifecycle Support production systems and participate in the on‑call rotation Preferred Background & Experience Bachelor’s degree in Computer Science or related field 4+ years of backend development experience with modern tech stacks 2+ years of hands‑on experience with Java, Kotlin, or Scala Solid understanding of relational databases (e.g., PostgreSQL) and ORM tools Experience with microservices or service‑oriented architecture (SOA) Comfortable working in Kubernetes‑based infrastructure environments Strong sense of ownership and ability to work end‑to‑end from concept to production Familiarity with collaborative development practices like code reviews and CI/CD pipelines Nice to Have Interest in personal finance or experience with consumer financial products Familiarity with distributed systems technologies such as Kafka and Docker Exposure to full‑stack development (React, TypeScript, or similar) Prior experience in fintech, digital banking, or financial services Addison Group is an Equal Opportunity Employer. Addison Group provides equal employment opportunities (EEO) to all employees and applicants without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran, in accordance with applicable federal, state, and local laws. Reasonable accommodation is available for qualified individuals with disabilities upon request. #J-18808-Ljbffr Addison Group
$130k - $160k
...Senior Backend Software Engineer Location: Gaithersburg, Maryland; Alexandria, VA; Chantilly, VA; Aurora, CO; St. Louis, MO; Tucson, AZ Clearance: Top Secret/SCI with the ability to successfully pass a Polygraph Schedule: Full Time Travel: No Remote: No Remote Company...SeniorFull timeRemote workEnnoble First, Inc.
Alexandria, VA2 days ago$130k - $160k
...Mid-to-Senior Backend Engineer We are seeking a highly skilled Mid-to-Senior Backend Engineer to spearhead the growth of our 24/7 high-throughput infrastructure, with a particular focus on expanding our core domains into the sports, prediction ecosystem. This role demands...SeniorRemote workCrypto
Washington DC3 days ago$130k - $190k
...Backend Engineer Nitra's mission is to build a more efficient healthcare system and the technology... ...to provide an ecosystem of fintech and software solutions that help doctors better... ...Intuit, former Governors, White House senior staffers, and a co-founder of CityMD....SeniorFull timeWork at officeWork from homenitra
Washington DC2 days ago- ...-Tel. Role Summary You'll build the backend systems that power Twenty's cyber and electromagnetic capabilities-software that ingests real-time operational signals,... ...product features. Collaborate with frontend engineers on API contracts and data structures that...SeniorFull timeWork at officeFlexible hours
Twenty Technologies
Washington DC5 days ago - BluJuniper, Inc. is seeking a Senior Backend Engineer in Washington, D.C. to develop secure platform services for computer vision and NLP applications. You will design backend services focusing on data modeling, authentication, and integrations, primarily using Go. Candidates...SeniorFlexible hours
- Mapbox is looking for a Software Development Engineer III to join its Maps API team in Washington, DC. You will lead the development of new mapping... .... Candidates should have 8-10+ years of experience in backend services development and proficiency in Python, Typescript...SeniorRemote job
- BluJuniper, Inc. is looking for a Senior Backend Engineer in Washington, D.C. The ideal candidate will design, develop, and maintain backend services... ...teams to ensure the delivery of secure and scalable software systems. Candidates should have strong communication skills...Senior
- CGI Njoyn is seeking a Senior Software Engineer - Backend in Washington, D.C. You will help build an AI‑assisted platform handling federal financial audits, ensuring trusted decision-making through a robust rules engine. The role involves designing, developing, and maintaining...Senior
- ...Senior Software Engineer – Backend Anywhere Type: Permanent Category: Engineer Industry: Technology Workplace Type: Remote Reference ID: JN -052026-106925 Date Posted: 06/10/2026 Shortcut: Description Recommended Jobs Description...SeniorHourly payPermanent employmentFull timeLocal areaRemote work
Eliassen Group
Washington DC1 day ago - ...deliver measurable results across technology, strategy, and operations. This role is ideal for a senior backend engineer who thrives in building reliable, scalable, and secure software systems. You will support the design, development, and deployment of backend services for...Senior
$145k - $190k
A leading technology firm in Virginia is seeking a Backend Support Software Developer for an onsite role supporting the National Geospatial-Intelligence Agency (NGA). The ideal candidate will have expertise in Python, C#, and/or Java, with responsibilities including troubleshooting...Senior- Leidos is seeking a TS/SCI cleared Senior Systems Engineer for a mission-focused role in Bethesda, Maryland. You will design, develop, and deploy software for the DIA‑NMEC DOMEX Technology Platform. The position emphasizes collaboration and innovation within a dynamic team...Senior
- ...configurable, multi-tenant travel commerce engine, enabling partners to launch world-... ...custom engineering. We’re looking for a senior software engineer who has adopted the best... ...the best out of them. Tech stack Our backend systems are written in Scala, and we use...SeniorRemote jobWork from home
- ...cybersecurity startup and we’re actively looking to build and grow our engineering team! Corsha is building an Identity Provider (IdP) for... ...in an exciting technology startup. We have an opening for a Backend Software Engineer to join our Agile software development team who...SeniorTemporary workWork at officeRemote workFlexible hours
- Agile Defense is seeking a Software Engineer (Java, OpenFGA) to join their team in Arlington, VA. This hybrid role requires you to build distributed backend services supporting operational AI and scalable delivery. The ideal candidate will have over 10 years of experience...Senior
$137k - $200.2k
MAXAR TECHNOLOGIES, INC. is seeking an experienced API/Java/Python Developer to join its team in Washington, DC. The role focuses on developing high-performance, API-driven services, ensuring secure coding practices, and collaborating with multidisciplinary teams to implement...Senior$168.33k - $252.49k
Comcast is seeking a Senior Software Engineer to lead backend engineering for AI Agent initiatives in Washington, DC. You will design scalable systems and serve as a technical anchor, mentoring junior engineers. The ideal candidate has significant experience with Python...Senior- ...week. Responsibilities include establishing website architecture, collaborating with teams, testing applications, and managing the entire software development lifecycle. A comprehensive understanding of PHP, MySQL, and JavaScript is required. #J-18808-Ljbffr Itlearn360Senior3 days per week
$110k - $115k
...Back End Application Developer II for the Naval Dosimetry Center in Bethesda, Maryland. This full-time position involves architecting backend solutions and developing Java Spring Boot microservices, ensuring security compliance, and supporting mission-critical systems. A...SeniorFull time- ...for a skilled Java Developer to join our team in Washington, DC. The ideal candidate will have over 6 years of experience in Java Software Development, particularly in building back-end applications and working with microservices under an agile framework. Duties include...SeniorRemote work
- 6AM City, LLC is seeking a skilled developer to join our Application Development Team in Washington, DC. This hybrid role involves working closely with Agile teams to solve complex business challenges using Java, AWS, and SQL. The ideal candidate will have over 5 years ...Senior
- A leading tech company is seeking a Senior Software Engineer II in Seattle. You will design and implement complex backend services in a cloud-native environment, make key architectural decisions, and mentor other engineers. Required qualifications include 5+ years of experience...SeniorRemote job
- E-INFOSOL LLC in Washington, DC, is seeking a dedicated C# / .NET Developer to join a customer-focused team. This full-time role involves developing high-quality web applications to support mission-critical operations. Successful candidates will possess a Bachelor’s degree...SeniorFull time
- ...LLC is looking for a highly motivated Sr. Engineer to join their team. This remote position... ...work independently and contribute to backend development and infrastructure for cloud... ...managing CI/CD pipelines, and supporting software integration. The ideal candidate will have...SeniorRemote job
$89.6k - $223.2k
Job order - J0626-1063 - Permanent Full Time Title: Senior Software Engineer — Backend / Rules Category: Software Development/ Engineering Location: Washington, District of Columbia, United States Job Description We're building an AI‑assisted platform that helps our...SeniorPermanent employmentFull timeWork at officeLocal area$145k - $151.26k
...is mandatory. This position offers a competitive salary between USD $145,000.00 - USD $151,258.00 per year. The ideal candidate will work collaboratively, following best coding practices and contributing to high-quality software solutions. #J-18808-Ljbffr UNAVAILABLESenior- Leidos LLC has an exciting opportunity for a Sr. Java Developer in Bethesda, MD. The role involves designing and maintaining backend microservices using Java and Spring, supporting Agile practices. Candidates should have significant experience with cloud platforms and must...Senior
$132k - $212k
...Senior Software Engineer - Backend/Platform Agentic AI Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide...SeniorFull timePart timeWorldwideFlexible hoursDynamic Yield
Arlington, VA5 days ago- A leading staffing agency is seeking a Senior Backend Software Engineer to play a pivotal role in transforming a core financial product. This remote contract position requires expertise in Java, Kotlin, or Scala and the ability to deliver high-availability services in...SeniorRemote jobContract work
- A growing cybersecurity startup in Washington, D.C. is seeking a Backend Software Engineer to join their Agile team. The ideal candidate will have experience in networking applications and programming languages like Go, C++, and Java. You'll work on innovative projects...SeniorFlexible hours
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