768 Backend Developer jobs in the United States

Akkodis is seeking a Backend Developer for a Contract job with a client in Phoenix, AZ. The ideal candidate will have strong experience in backend development using Kotlin, Vert.x, and RxJava, with a solid foundation in RESTful APIs, automated testing, and CI/CD practices.

Rate Range: $22.73/hour to $0.30/hour; The rate may be negotiable based on experience, education, geographic location, and other factors.

Backend Developer job responsibilities include:

• Design and develop backend services using Kotlin, Vert.x, RxJava, and Spring Boot.
• Build and maintain RESTful APIs with a strong understanding of JSON and web service technologies.
• Integrate automated testing frameworks such as Selenium, REST Assured, and Cucumber into CI/CD pipelines.
• Collaborate with cross-functional teams to ensure code quality, performance, and scalability.
• Participate in agile development processes using tools like Jira, Rally, Git, and Maven.

• Bachelor's Degree in Computer Science, Engineering, or related field.
• 5+ years of experience in backend development with Java/J2EE and Kotlin.
• Experience with SQL and NoSQL databases (Oracle, DB2, Cassandra, Couchbase).
• Familiarity with observability tools and practices including telemetry, SLO alerting, and monitoring.
• Knowledge of CI/CD tools (Jenkins, Nexus), Git branching strategies, and software testing standards.

• The California Fair Chance Act
• Los Angeles City Fair Chance Ordinance
• Los Angeles County Fair Chance Ordinance for Employers
• San Francisco Fair Chance Ordinance

8+ years plus experience required.
1. Strong proficiency in java programming language with a deep understanding of object-oriented principles and design patterns.
2. Hands on experience in developing web applications using spring boot framework.
3. Proficient in working with mongo dB or other NoSQL databases for data storage and retrieval.
4. Good understanding of micro services architecture, restful apis, and cloud services.
5. Strong analytical and problem-solving skills with the ability to troubleshoot complex technical issues.
6. Excellent communication and leadership abilities to effectively lead a team and collaborate with stakeholders.

MANTECH seeks a motivated, career- and customer-oriented SME Backend Java Developer to join our innovative team in Ashburn, VA . This is a hybrid position with 2 days onsite and 3 days remote.

Each day U.S. Customs and Border Protection (CBP) oversees the massive flow of people, capital, and products that enter and depart the United States via air, land, sea, and cyberspace. The volume and complexity of both physical and virtual border crossings require the application of “big data” solutions to promote efficient trade and travel.

Responsibilities include but are not limited to:

• Lead and perform development and maintenance of end-user focused, object-oriented, data-driven analytic applications to support CBP threat analysis and targeting.

• Independently identify technical solutions for business problems, directly contribute to conceptual design, and routinely collaborate with Enterprise/Application architects, Database Architects, Data Scientists, and mission stakeholders.

• Develop new code, modify existing application code, conduct unit and system testing, and engage in rigorous documentation of developed and delivered application use cases, data flows, and functional operations.

• Demonstrate a strong practical understanding of industry standard Java Application Servers technologies such as WebLogic, WebSphere, TomcatEE and/or JBoss for application delivery and a strong understanding of application-relevant cargo and passenger data and databases used to support analytic application development, functionality, and targeting end user (officer) operation.

• Actively participate in formal and informal design reviews, solution sessions, and project milestone meetings as well as contribute to project document artifacts for presentation to both technical and non-technical audiences.

• Integrate with, and materially contribute to, project portfolio teams as a matrixed resource to provide development and issue resolution expertise in collaboration with data scientists, intelligence analysts, developers, and other participants at the direction of a project manager.

• Mentor junior developers and actively contribute to the development of a community of practice focused on enhancing technical skills, sharing best practices, and promoting enhanced mission domain knowledge.

Minimum Qualifications:

• HS Diploma/GED and 20+ years or AS/AA and 18+ years or BS/BA and 12+ years or MS/MA/MBA and 9+ years or PhD/Doctorate and 7+ years.

• Hands-on experience with Java 8+ and newer language features and expertise in Java and Object-Oriented Design and development principles (e.g. XML, JSON).

• Hands-on experience using Spring to develop Micro Services and/or REST API and with one or more ORM libraries such as Hibernate.

• Hands-on experience with one or more relational database systems (e.g., Oracle, MySQL, Postgres) and with SQL and developing complex SQLs involving multiple databases.

• Hands-on experience with web/application servers (e.g., Tomcat, WildFly, WebLogic) and with building and deploying containerized applications (e.g., Docker, Kubernetes, Openshift).

• Experience developing solutions via Amazon Web Services (e.g, AWS EC2, RDS, S3).

• Hands-on experience with one or more build tools (e.g., Maven, Gradle, Bamboo), with Software Source Code Management tools (e.g. BitBucket, Git), and leveraging distributed data/computing tools including Hadoop, Spark, Impala, MySQL, Elasticsearch, Solr, etc.

Preferred Qualifications:

• Developing applications with Spring Boot.

• Experience with NoSQL database systems such as Cassandra, MongoDB, DynamoDB, etc.

• Experience executing continuous integration with Jenkins or Bamboo.

• Familiarity with Unix/Linux and shell scripting.

• Hands on experience with Agile Lifecycle Management and engineering tools including Atlassian Jira and Confluence as well as application IDE tools including Eclipse, Jupyter Notebook, and Apache Zeppelin.

• Agile Scrum participation and, ideally, Scrum Master experience.

Clearance Requirements:

• Must be a U.S. citizen with the ability to obtain DHS CBP suitability prior to starting this position.

Physical Requirements:

• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, which may involve delivering presentations.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at and provide your name and contact information.

Interview : Video

Visa : USC, GC

This is hybrid from day -1 ( Need only local candidates )

Description :

About the job

Our client, a large digital music, podcast, and video service, is looking to hire an Back End Developer to join their team.

Responsibilities

• This candidate will join our newly formed team inside Content Platform from August until November to help us proactively flag content that are violating certain safety policies in visual entities containing image and video.
• You should expect to work mostly with backend services (Java) and event streaming pipelines (Scala, Pubsub) to consolidate the detection for all entities with other proactive safety mechanisms that we currently support.
• Consolidate some detection flows so we can take advantage of our new capability to automatically remove content from our storage.
• By the end of this work we also expect to be able to deprecate 10% of our system inventory and make the maintenance of the current components more sustainable for one team. We will also be releasing a dashboard to track the quality and performance of this new proactive detection flow.
• You will also get the experience of working in a cross timezone team spread through multiple cities in the world (New York, London, Amsterdam and Milan) where we empower more async work and communication.

• 3+ years of experience as a Backend Engineer
• Java experience
• Scala experience
• Data streaming experience
• BigQuery is a plus, Google Cloud

• Lead the development and testing of the systems and services
• Contribute to the technical architecture and design of the product
• Translate product requirements into user stories and scalable technical solutions
• Deliver reliable, scalable services in a production environment
• Propose new ideas and contribute to innovation initiatives
• Collaborate with project leads, product managers, and fellow engineers as well as functional (business and back office) teams
• Participate in sprint planning, code review, development, backlog grooming
• Will have to follow data security, compliance best practices

• Bachelor's degree in Computer Science or a related field
• 3-4+ years of hands-on experience with Java or Kotlin and event-driven architecture
• 5-7+ years of programming experience, ideally with modern tech stacks
• Experience with Kubernetes and service-oriented architectures (100+ services in production)
• BE stack and database experience: Proficiency in Java/Kotlin/DynamoDB
• Cloud platform experience:
  -AWS
  -Temporal (nice to have)
• CI/CD pipelines experience: gitlab
• Background in building SOA or microservices-based applications
• Strong sense of ownership and accountability, with a track record of seeing projects through from start to finish
• Passion for solving complex problems and delivering impactful features
• Comfortable working in a collaborative environment with code reviews and shared design processes
• Will be translating business requirements to technical requirements? Will mostly be implementing stories
• Will follow specific design patterns, best practices or concept requirements? Yes
• Agile environment
• Testing experience required

• Analyze user needs and develop software solutions
• Work with project manager or product owner to meet specification needs
• Recommend software upgrades to optimize operational efficiency
• Collaborate with other developers to design and optimize code
• Create flowcharts and user guides for new and existing programs
• Document all programming tasks and procedures
• Perform routine software maintenance

• Previous experience in software development, computer engineering, or other related fields
• Knowledge of Java, Python, or other programming languages
• Familiarity with relational databases such as MySQL, Oracle, and SQL Server
• Deadline and detail-oriented
• Strong analytical and critical thinking skills

A forward-thinking company in the United States is currently seeking a skilled Backend Developer with expertise in Python, data integration, and AI systems. This role involves contributing to the development of cutting-edge, scalable back-end architecture for a prominent AI-driven recruitment platform.

About the Opportunity:

• Hybrid or Remote: Remote (U.S. Based Only)
• Shift: Standard business hours
• Schedule: Full-Time
• Setting: Cloud-native, collaborative environment

• Designing and developing robust backend services using Python
• Building, managing, and optimizing PostgreSQL and MSSQL databases
• Integrating with external APIs, backend systems, and OpenAI APIs
• Implementing ETL/ELT pipelines and managing both synchronous and asynchronous data flows
• Working with vector databases for AI-related indexing and retrieval
• Deploying and managing solutions in Azure, leveraging services like AKS, Service Bus, and more
• Developing in a Linux-based environment, automating workflows and deployments
• Collaborating with frontend, AI, and product teams to ensure smooth full-stack interactions
• Focusing on security, scalability, and performance across services and data layers
• Championing the use of AI development accelerators to increase efficiency

• 5-10 years of backend development experience, primarily with Python
• Deep experience with PostgreSQL and MSSQL in production environments
• Strong knowledge of API design, integration, and data processing pipelines
• Comfortable with both event-driven (async) and transactional (sync) architectures
• Solid understanding of security practices in cloud, container, and full-stack environments
• Exposure to OpenAI APIs, embeddings, or AI agent integrations
• Experience deploying in Azure, with hands-on use of AKS, APIM, Service Bus, DevOps, and Storage
• Background in Linux-based development and scripting
• Passion for adopting and learning AI-assisted development tools
• Experience with GitHub Copilot, or Cursor, OpenAI APIs

• Experience with DevSecOps or infrastructure as code in Azure
• Contributions to or interest in open-source Python tools
• Clear, proactive communication style and collaborative mindset

• You understand team dynamics, stakeholder needs, and business context
• You've worked with tech teams-and maybe even dabbled in SQL, JIRA, or light coding
• You know how to solve problems, manage timelines, and think analytically

• Java Full Stack Development -Core Java, Spring Boot, REST APIs, Microservices, Git, and AWS
• DevOps and Cloud Engineering -CI/CD, Docker, Jenkins, Kubernetes, Infrastructure-as-Code, and cloud platforms
• Data Science and AI -Python, machine learning, NLP, model deployment, and tools like TensorFlow and SageMaker
• Data Analytics and Engineering -SQL, Power BI, Tableau, Snowflake, Databricks, Python ETL, and more

• QA Analyst → Java Developer
• Business Analyst → Data Scientist at a FinTech startup
• Project Manager → DevOps Engineer at a cloud-native company

• Entry-Level Software Programmers (Java/Python)
• Java Full Stack Developers
• Data Analysts & BI Engineers
• Data Scientists & ML Engineers

• Recent grads in CS, Engineering, Math, or Statistics
• Professionals seeking a career switch to tech
• Candidates with career gaps or lacking real-world experience
• Individuals looking to boost their skill portfolio for better job prospects

About the job Backend Developer

Must Have:

• 3-5 years
• Build and maintain backend services and APIs using Go (Golang) .
• Perform unit testing for GoLang
• Working knowledge of at least two of the following monitoring tools: Elkstack, Promethius, or Dynatrace.
• Collaborate with senior developers and cross-functional teams to deliver project requirements.
• Experience with CI/CD pipelines, Git, and containerization (Docker).
• Understanding of APIs, RESTful services, and database interactions.
• Perform unit testing by using at least one of the following unit testing frameworks: Junit, Mockito, mocha, chai, or golang and using at least two of the following monitoring tools: Elkstack, Promethius, or Dynatrace.

• Utilize the technical stack of Golang, Kafka, MongoDB, Docker, GitLab and Harness.
• Utilize Mongo DB to store and access data, communicate to it from a Microservice, design and implement the data model, and optimize as needed or using Kafka to create topics to publish or consumers to ingest topics from.
• Familiarity with HL7, JSON/XML data formats.
• Familiarity with healthcare framework such as HL7 FHIR and X12 related standards.