13,608 Backend jobs in the United States

Description

American Express - Global Commercial Services - Shared Services Engineering

Team: Commercial Data Exchange

Role: Backend Software Engineer

Group:

In Global Commercial Services Technology (GCST), we develop software products and platforms across Small Business, Mid and Large Market and Global Commercial Clients. Our goals center around furthering the company's priorities of building on our strong position in commercial payments, whilst making American Express an essential part of our B2B customers’ digital lives. We continuously strive to optimize the level of innovation, quality, and speed with which we deliver across many products and channels including Sales, Client and Individual Customer Acquisition, Digital Servicing, Commercial Lending, B2B Payment Products, Remittance Processing and Commercial Data. Together with multiple Product and Engineering teams outside of GCST, we work collectively to deliver enterprise capabilities to our B2B customers.

As a part of our tech team, we could work together to bring ground-breaking and diverse ideas to life that power the digital systems, services, products and platforms that millions of customers around the world depend on. If you love to work with APIs, contribute to open source, or use the latest technologies, we’ll support you with an open environment and learning culture to grow your career.

Team/ Project:

The CDX team is ramping up to support a variety of new workloads such as a focus on re-writing current applications to Kotlin to better integrate across other Amex systems, as well as new feature builds including a commercial data exchange focused project supporting Real Time Authorizations (RTA) aimed at helping businesses make better business decisions with their data - particularly enabling 3rd party data integrations from card authorization data to external customers.

Day to day work will build off their microservice based foundational platform, building integrations with Kafka, building APIs to facilitate backend services, and expose APIs for the collection of certain data constructs such as authorizations.

What you'll be doing:

• Play a critical role in the development, design, and maintenance of American Express Commercial APIs

• Architect large-scale distributed systems that ensuring continued success

• Work across the engineering team to build new product features and services

• Lead, mentor and learn with other developers in all aspects of planning, development and testing

• Be a catalyst for driving best-in-class technology practices and patterns while staying engaged with the latest technology trends

What we're looking for in you:

• Proactivity: Resourceful, has grit, and a positive “can do” attitude; acts without being told what to do

• Flexibility/adaptability: Is cool with rapidly changing priorities and projects

• Follow-through: Follows-through on items without being managed

• Calm under pressure: Ability to navigate and lead the team through high-priority last minute requests and other high stress situations; Works well under high-pressure timelines

• Analytical skills: Likes learning and learns quickly

• Communication: Ability to speak clearly and with intent

Qualifications

• Strong experience working with Kotlin as well as any of the following object-oriented backend languages: C#, Scala, Java

• Knowledge of frameworks and tools in the respective language enabling effective and efficient development

• Recent experience working with Kotlin at the enterprise level – particularly in Kotlin re-writes is a plus.

• Understanding and interest in architectural patterns for highly available, scalable, low-latency, asynchronous systems (for example, well-designed REST APIs, Microservices, high volume data pipelines, efficient algorithms)

• Exposure to the benefits and challenges micro-services can bring

• Experience working with Kafka or other streaming platforms

• Experience with any cloud-based provider like AWS, Azure, or Google Cloud

• Strong experience with relational (PSQL) and non relational (redis, couchbase) databases

• Familiarity with CI/CD pipelines

• Experience working in agile environments with code reviews and automated testing

Skills

Microservices, kotlin, C#, rest api, CI/CD, Cloud, database, Kafka, sql, redis, couchbase, postgresql, GraphQL

Top Skills Details

Microservices,kotlin,C#,rest api,CI/CD,Cloud,database,Kafka

Additional Skills & Qualifications

Non-Technical:

• Must be a self starter, growth oriented engineer who takes initiative in their work - "go-getter" mind set

• Must be confident in their skills - can take requirements and run with them. This includes analyzing, pushing back on stakeholders, poking holes when needed.

Biggest challenge - finding people who are good at asking questions, good at finding the holes in requirements, can be receptive to feedback in the coding interview and adapt, and can articulate the decisions they are making when problem solving and why

Bonus Experience:

• Experience with Docker, Terraform, and Kubernetes

• Experience with financial data, third-party integrations, and high throughput systems

• Full-stack experience with React or Angular is a plus (current tech stack is heavier angular but going through re-write to React)

Experience Level

Intermediate Level

Pay and Benefits

The pay range for this position is $55.00 - $62.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:

• Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a hybrid position in New York,NY.

Application Deadline

This position is anticipated to close on Oct 22, 2025.

h4>About TEKsystems:

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We’re a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

Responsibilities: Bachelor's degree in computer science or related field. 3-5 years of backend development experience. Proficiency in at least one backend language (Python). Advanced proficiency in backend development with Python frameworks, including Django or Flask. Experience designing and implementing restful services, focusing.

About Us: Synergistic IT is a full-service staffing and placement firm servicing clients in America for the past 12+ years. We are dedicated towards fulfilling the IT needs of our clients. From staffing to full implementation of projects we provide the highest quality IT services. We don't just help you secure a tech job, but we build your solid career in technology.

8+ years plus experience required. Strong proficiency in Java programming language with a deep understanding of object-oriented principles and design patterns. Hands on experience in developing web applications using Spring Boot framework. Proficient in working with MongoDB or other NoSQL databases for data storage and retrieval. Good understanding of micro services architecture.

Company: Airvine is a fast-growing Silicon Valley innovator of the industry's first broadband wireless backhaul solutions for the enterprise. The company has developed the industry's only complete wireless system offering that delivers multi-gigabit/sec data transfer rates through walls and concrete barriers, without any of the complexity of wired solutions. Job Description: Responsible for designing, developing, and maintaining the backend infrastructure of our network management platform. Will be working collaboratively with the frontend developer and network engineers to ensure the seamless operation of the system. Looking for a candidate with a background in embedded systems and network management, with strong Python programming skills, and experience with RESTful APIs. Key Responsibilities: Develop architecture for configuring and managing a cluster of network nodes. Design, develop, and maintain backend services and APIs using API frameworks like uwsgi or FastAPI. Design and implement RESTful API for integration with FrontEnd Systems and networking and system services. Demonstrate proficiency with Linux-based systems and expertise with scripting languages. Use the Yocto framework to create the image for the embedded system to ensure the security and scalability of backend services. Stay up-to-date with emerging technologies in backend development and network management. Education: BS/MS degree in Computer Science, Computer Engineering, or related field. Qualifications/Skills: Proven experience in software development with a focus on network management or related areas. Working experience with building embedded systems software. Experience in building applications in a Linux environment and shell scripting. Strong proficiency in Python programming. Experience with FastAPI, Uwsgi or similar web frameworks. Familiarity with RESTful API design and implementation. Good understanding of networking concepts, protocols, and technologies (TCP/IP, HTTP, SNMP). Excellent problem-solving and debugging skills. Ability to work collaboratively in a team and independently when necessary. Strong communication and interpersonal skills. J-18808-Ljbffr

Greetings,

iQuasar LLC is seekinga highly skilled Backend Developer with a strong specialization in Data Engineering. The role involves building and optimizing backend systems that handle large-scale data processing, storage, and integration. This is a 100% remote independent contractor role, providing flexibility while contributing to mission-critical DoD objectives. Candidates must hold an active Top Secret clearance with SCI eligibility (or higher).

• Position: Backend Developer
• Location: Remote
• Clearance: Top Secret with SCI eligibility (or higher)

• Design, develop, and optimize backend data pipelines and ETL processes.
• Integrate structured and unstructured data sources into scalable backend systems.
• Implement data models, APIs, and services to support advanced analytics and mission operations.
• Ensure data security, integrity, and compliance with DoD standardsCollaborate with data scientists, analysts, and DevOps teams to deliver reliable data solutions.

• Active Top Secret clearance with SCI eligibility or higher.
• Strong programming skills in Python, Java, or Scala for backend and data processing.
• Experience with data engineering tools and frameworks (Apache Kafka, Spark, Hadoop, Flink, etc.).
• Proficiency with databases (SQL, NoSQL, graph) and data modeling techniques.
• Hands-on experience with cloud-based data platforms (AWS Redshift, Azure Data Lake, GCP BigQuery).
• Familiarity with containerization and orchestration (Docker, Kubernetes).
• Bachelor's degree in computer science, Data Engineering, or related field (or equivalent experience).

• Availability to start a new job
• Best Rates
• Contact #

Placement Type:

Temporary

Salary:

$65-75 Hourly

Start Date:

*Candidates requesting to work as C2C or 1099 will not be considered*

- This is a fully remote role, working PST hours, approved for 9 months, with a possible extension past that point.

- Compensation is based on several factors including, but not limited to education, relevant work experience, relevant certifications, and location. Additional benefits offered may include; medical health insurance and dental insurance, life insurance, and eligibility to participate in a 401k plan with company match.

- This is primarily a backend development / coding related role, with 75% of time to be dedicated in this area.

For this role Candidates must have:

• Strong Java experience with Kotlin and Scala experience (all 3 are needed for consideration for this role)
• Candidates who have worked for Financial organizations or produced work for Financial organizations will have preference, others who have worked within highly regulated industries (Insurance / Healthcare) will be considered.

Other key skills that will set a candidate apart from others:

• ACH transaction experience / NACHA compliance experience is an added advantage for consideration for this role

Role description/Summary:

Our established Financial Client is seeking a strong candidate for a Backend Developer/Software Engineer who will play a key role in transforming a client's product architecture.

• The primary purpose of this role is to design, build, and maintain backend services that power our financial transaction processing systems, with a focus on ACH processing and NACHA compliance.
• Will be responsible for developing secure, scalable, and efficient services using Java/Kotlin/Spring in a micro-service-based architecture running on Kubernetes.

Success in this role will be measured by:

• Accuracy and timeliness of ACH transaction processing.
• System stability, scalability, and uptime.
• Compliance with NACHA, FedACH, and internal policies.
• Reduction in transaction discrepancies and resolution turnaround time.

Key/Principal Responsibilities:

• Process incoming and outgoing ACH transactions and files in accordance with NACHA rules and FedACH requirements.
• Investigate and resolve ACH discrepancies, errors, and exceptions.
• Design, develop, test, and maintain backend services and APIs in a microservices environment.
• Collaborate with cross-functional teams, including product, operations, and compliance, to gather requirements, provide estimates, and deliver high-quality solutions.
• Participate in sprint planning, code reviews, and system architecture discussions.
• Ensure backend systems follow security, compliance, and data privacy best practices.
• Monitor, analyze, and improve system performance through analytics, metrics, and logging integrations.
• Maintain documentation and contribute to knowledge sharing within the team.
• Work closely with senior engineers and architects; may mentor junior developers depending on experience level.

Required Skills and Experience:

• Minimum 6+ years of programming experience, ideally with a modern backend stack.
• 4+ years' experience with Java, Kotlin, and Scala.
• Strong understanding of relational databases (PostgreSQL preferred) and ORM frameworks
• Experience with micro-services and service-oriented architectures (SOA).
• Cloud platforms experience (Kubernetes preferred).
• Proficiency with CI/CD pipelines.
• Test-driven development experience, including unit and integration testing.
• Proven ability to translate business requirements into scalable technical solutions.
• Familiarity with secure coding practices and regulatory compliance in financial services.
• Agile software development experience.

Nice to have skills:

• Experience with Fiserv systems and/or general credit product knowledge.
• NACHA experience (highly preferred).
• Experience processing ACH returns, NOCs, and DNEs.
• Exposure to analytics and monitoring tools.
• Relevant technical certifications (e.g., Java, Kubernetes, AWS, or NACHA Accredited ACH Professional).

About Aquent:

Aquent connects the best talent in marketing, creative, and design with the world's biggest brands. Our eligible talent has access to amazing benefits like subsidized health, vision, and dental plans, paid sick leave, and retirement plans with a match.

Aquent is an equal-opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics. We're about creating an inclusive environment-one where different backgrounds, experiences, and perspectives are valued, and everyone can contribute, grow their careers, and thrive.

The target hiring compensation range for this role is $5 to 75. Compensation is based on several factors including, but not limited to education, relevant work experience, relevant certifications, and location.

About Aquent Talent:

Aquent Talent connects the best talent in marketing, creative, and design with the world's biggest brands.

Our eligible talent get access to amazing benefits like subsidized health, vision, and dental plans, paid sick leave, and retirement plans with a match. We also offer free online training through Aquent Gymnasium . More information on our awesome benefits !

Aquent is an equal-opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics. We're about creating an inclusive environment-one where different backgrounds, experiences, and perspectives are valued, and everyone can contribute, grow their careers, and thrive.

At Elevation Church, we look to link arms in ministry with those who are passionate about stepping into their God-given calling. While we’re a staff from all different backgrounds and walks of life, our mission is the same - to reach people with the Gospel. We’re grounded in scripture and guided by our values, so check out our website ( to be sure you’re aligned before you step into the application process with us, particularly paying attention to our Beliefs and our Code.

• Write, test, and maintain clean, scalable code for backend systems
• Review pull requests and provide constructive feedback
• Collaborate on designing and evolving backend system architecture
• Work closely with team members to integrate backend solutions
• Troubleshoot and resolve issues in production and during development
• Optimize system performance
• Enforce coding standards and best practices within the team

• Active participation in a church (we look for a lifestyle of inviting people to church, volunteering, generosity, and prioritizing community)
• 3+ years of proven backend development experience
• Proficiency in at least one modern backend programming language (Python, Java, Node.js, Go, C#, Rust)
• Strong understanding of data structures, algorithms, and system design
• Experience designing and implementing APIs using non-relational databases
• Real-world experience working on and scaling APIs that have wide reach
• Ability to quickly learn and adopt new technologies
• Experience with test-driven development

• Rust programming experience
• Experience with microservices architectures
• Familiarity with Kafka
• Experience with GraphQL
• Knowledge of the Elastic Stack (Elasticsearch, Logstash, Kibana)
• Terraform

• We’re a Sunday-Thursday work environment . Monday-Thursday, we’re in the office (8:30AM - 5PM); on Sunday, we’re supporting the weekend worship experience either directly in our roles or by choosing a weekly serving opportunity at one of our Elevation Church campuses.
• There’s a lot to accomplish each week, so we’re pretty fast-paced. We’re also not afraid to pivot a strategy or project quickly to meet the needs of the weekend - adaptability is a key competence for us.
• Yes, we work hard. But we’re good at playing hard, too. We’re a creative staff, so there’s no shortage of activities around our offices to have some fun !
• You can’t help but grow on our staff. You’ll be around some incredible people. Professional development opportunities will be all around you , both in structured and unstructured ways.
• We expect you to be disciplined in your spiritual practices - be in your Bible, spend time with the Lord in prayer, meditate on and apply the weekly sermon.
• Bring your full self to every project, conversation, and initiative at hand.

• Elevation Church pays 100% of every employee’s medical benefits for full-time staff
• 403b with 4% match
• Dental & Vision benefits
• Paid time off for life, vacations, and rest
• Elevation Church subsidized 6 sessions of counseling annually
• Basic Life Insurance for employee, spouse, and child(ren)

*Description*
TEKsystems is looking for a Backend Developer, with a strong understanding of Product Information Management (PIM). This is a full time role and sits downtown Chicago.
*Skills*
kafka, postgresql, nestjs, typescript, pims, Javascript
*Additional Skills & Qualifications*
software engineer, developer
Required Skills
* 5+ years of experience developing leading-edge online applications
* Proficiencyin backend programming runtime and languages such as Node.js, Python, etc.
* Experience with Informatica P360 software
* Understanding of web technologies including HTML, JavaScript, and CSS.
* Proficiency in data processing frameworks (e.g., Apache Spark, Apache Kafka) and middleware/API solutions e.g., WebMethods, Azure API getaway
* Experience with PIM solutions and business processes (e.g. process flows and data standards) and technologies (e.g. Informatica)
* Experience with database management systems such as SQL, MySQL, PostgreSQL, or MongoDB
* Experience designing, developing, and maintaining RESTful APIs and data integration pipelines
*Pay and Benefits*
The pay range for this position is $ - $ /yr.

*Workplace Type*
This is a hybrid position in Chicago,IL.
*Application Deadline*
This position is anticipated to close on Oct 9, 2025.
h4>About TEKsystems:

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.