CrawlJobs Logo

Backend Developer

United States, Appleton · Job Posted April 20, 2026
Apply Position
Job Link Share

Job Description

A rapidly growing software team is looking for a Backend Developer to help expand and scale a complex operational platform used by organizations with large, distributed locations. This role focuses on the core systems that power the application, including application logic, data architecture, integrations, and performance optimization. You will work closely with a small, collaborative engineering team to enhance an established platform while helping design new capabilities as the product continues to expand into new industries and use cases.

Job Responsibility

  • Design and build backend functionality using Ruby on Rails
  • Develop and maintain application logic within the model, controller, and database layers
  • Create and maintain RESTful APIs used by internal and external systems
  • Optimize database queries and data structures for performance and reliability
  • Implement integrations with third-party systems and vendor platforms
  • Support the scalability and reliability of a large operational application
  • Collaborate with engineers to refine architecture and improve system design
  • Participate in code reviews and contribute to engineering standards
  • Troubleshoot and resolve complex backend and data-related issues

Requirements

  • 5+ years of professional software development experience
  • Strong hands-on experience with Ruby on Rails in a professional production environment
  • Experience building and maintaining backend systems and APIs
  • Solid understanding of relational databases and data modeling
  • Ability to design scalable application components
  • Experience working within established production systems
  • Comfortable working in a collaborative engineering environment

Nice to have

  • Experience building data-driven operational platforms
  • Familiarity with system integrations and automated workflows
  • Background working on internal product platforms rather than short-term consulting projects
  • Exposure to performance optimization and system scalability

What we offer

  • medical
  • vision
  • dental
  • life and disability insurance
  • 401(k) plan

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Similar Jobs for

Backend Developer

8 matching positions

Backend Developer

Implement domain logic and definitions within the system, and collaborate on pro...
Location
Location
Bosnia and Herzegovina , Mostar
Salary
Salary:
Not provided
sportradar.com Logo
Sportradar
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong experience with Java
  • Solid hands on experience with Spring Boot (REST APIs, configuration, security basics)
  • Good understanding of object oriented design, clean code, and design principles (SOLID)
  • Experience building and maintaining backend services in production environments
  • Proficiency working with SQL databases and NoSQL databases (e.g. PostgreSQL, MySQL, MongoDB) - Designing schemas, writing efficient queries, indexing
  • Familiarity with Git and modern development workflows (code reviews, pull requests)
  • Knowledge of messaging and event driven systems: Kafka, RabbitMQ, or similar
  • Practical experience using Docker - Building images, local development, containerized services
  • Familiarity with CI/CD pipelines and DevOps practices
  • Experience writing unit and integration tests
Job Responsibility
Job Responsibility
  • Implement domain logic and definitions within the system, and collaborate on product requirements by providing feedback and asking the right questions
  • Build reliable and scalable solutions, aiming for clean implementations that minimize bugs and reduce the need for support or rework
  • Continuously learn - whether it's the business domain, the technologies we currently use, or new tools and approaches we want to explore
  • Actively suggest improvements to technical solutions or domain implementation at any time, especially during team planning sessions and retrospectives
What we offer
What we offer
  • Collaborative environment with colleagues from all over the world including various social events and teambuilding
  • Flexibility to manage your workday and tasks with autonomy
  • A balance of structure and autonomy to tackle your daily tasks
  • Vibrant and inclusive community which welcomes all participants
  • Global Employee Assistance Program
  • Calm and Reulay app (leading well-being apps designed to support focus, quality rest, mindfulness, and long-term mental resilience)
  • Online training videos
  • Flexible working hours
  • Hybrid model with team members working in the office three days a week
  • Fulltime
Read More
Arrow Right

Backend Developer

We are looking for an experienced Treasury Software Developer to join our team a...
Location
Location
Turkey , İstanbul
Salary
Salary:
Not provided
amaris.com Logo
Amaris Consulting
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum 4 years of software development experience
  • Experience with Intertech products and Murex is highly preferred
  • Strong knowledge of SQL, C#, ASP.NET, and MVC
  • Experience in treasury / capital markets / banking systems
  • Strong sense of responsibility and disciplined working approach
  • Good communication and teamwork skills
  • Preferably based in Istanbul
  • Able to work in a hybrid structure (minimum 1 day onsite per week)
Job Responsibility
Job Responsibility
  • Develop and maintain treasury-related banking applications
  • Support integration and enhancement projects
  • Collaborate closely with business and technical teams
  • Contribute to system improvement and optimization activities
  • Fulltime
Read More
Arrow Right
New

Backend Developer

Develop and maintain high-quality backend systems using Golang and/or Python. Bu...
Location
Location
Indonesia , South Jakarta, Jakarta
Salary
Salary:
Not provided
Staffinc
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum of 2+ years of hands-on experience in backend development, preferably in a fast-paced SaaS product environment
  • Prior experience or familiarity with HRMS or payroll systems is highly preferred
  • Strong programming skills in Golang and/or Python, with a preference for production-level experience using Golang
  • Solid understanding of relational databases (e.g., PostgreSQL, MySQL), including query design, indexing, and performance optimization
  • Proven experience in building and maintaining scalable, secure, and standardized APIs
  • Hands-on experience with caching mechanisms such as Redis, local memory storage, or similar tools to improve application performance
  • Proficient in using Git and working with modern development workflows (e.g., pull requests, branching strategies, CI/CD)
  • Comfortable with unit testing practices — capable of designing test cases, using testing frameworks, and maintaining good test coverage on critical systems
  • Understanding of the software development life cycle (SDLC), with the ability to contribute across planning, development, testing, deployment, and iteration
  • Excellent time management and organizational skills, with the ability to take ownership and deliver outcomes independently
Job Responsibility
Job Responsibility
  • Develop and maintain high-quality backend systems using Golang and/or Python
  • Build APIs adhering to standardization and quality requirements
  • Ensure database performance optimization using techniques like indexing, caching, and query optimization
  • Implement caching mechanisms such as Redis or local storage to enhance system performance
  • Write clean, maintainable, and well-documented code that adheres to best practices
  • Conduct thorough unit testing to ensure code reliability and maintainability
  • Actively participate in code reviews and provide constructive feedback
  • Work closely with team members and stakeholders to align on project requirements and deliverables
  • Manage time effectively to meet deadlines while maintaining high-quality standards
  • Support and resolve issues as needed
  • Fulltime
Read More
Arrow Right
New

Backend Developer

We are looking for a skilled Java Software Engineer to join our software develop...
Location
Location
Portugal , Lisboa
Salary
Salary:
Not provided
vodafone.com Logo
Vodafone
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Degree in Computer Science, Engineering, or a related subject
  • Solid core Java and Java ecosystem knowledge
  • Knowledge of Spring Framework (core spring components) and Spring Boot
  • Knowledge of REST API, JSON, XML, Maven, software versioning and GIT
  • Knowledge and experience in building Spring microservices applications
  • Experience in creating Unit Tests (JUnit, Mockito) and system tests (automated testing)
  • Experience in using CI/CD tools (Jenkins, Nexus, SonarQube) and in design patterns to implement advanced software solutions
  • Experience with non-relational & relational databases (SQL, PostgreSQL, MongoDB)
  • Experience working in an Agile/Scrum development process
  • Familiar with Clean Code Principles
Job Responsibility
Job Responsibility
  • Accountable for designing, developing, building, and optimizing backend scalable applications
  • Develop solutions with excellent quality and speed, according to good practices and standards
  • Ensuring responsiveness of applications
  • Design and developing APIs
  • Meet both technical and consumer needs
What we offer
What we offer
  • Hybrid Work Model - Flexible hybrid work model with 8-10 in-office days per month, managed by team leaders
  • Vodafone Products and Services - Employees get a mobile phone, free communication plan, data card, and various discounts on services and products
  • Recognition - Recognition programs for innovative, creative, high-potential employees and exemplary behaviors
  • Health and Well-being - Well-being Program offers nutrition and psychological consultations, webinars, workshops, and discounts on various services and products
  • Learning - Access to Communities of Practice and a customizable digital training platform with high-quality content (namely Harvard Business Publishing, Skillsoft and Speexx)
  • Local and International Mobility - Internal recruitment with local and international rotation opportunities across departments and roles
  • Fulltime
Read More
Arrow Right
New

Backend Developer

Job Description: Core Java & Frameworks: Strong Core Java and Spring Boot applic...
Location
Location
United Kingdom , Belfast
Salary
Salary:
45000.00 - 50000.00 GBP / Year
https://www.randstad.com Logo
Randstad
Expiration Date
June 20, 2026
Flip Icon
Requirements
Requirements
  • Core Java & Frameworks: Strong Core Java and Spring Boot application development
  • experience with Java NIO (Channels, Buffers, Selectors) is expected.
  • Low-Latency & Trading Systems: Expert knowledge of FIX protocol, Market Connectivity, and low-latency programming.
  • Messaging & Data Middleware: Proficiency with middle-layer messaging (JMS, MQ, EMS, Kafka) and strong RDBMS concepts (Oracle, Sybase, MS SQL).
  • Cloud & DevOps: Experience with Microservices, Containerization (Docker/Kubernetes), Unix/Linux scripting, and CI/CD tools under Agile methodologies.
  • Standards & Practices: Strict adherence to Test-Driven Development (TDD) and enterprise development quality standards.
  • Productivity Tools: Basic competency in MS Office (Word, PowerPoint, Excel).
  • Education: Bachelor's/University degree or equivalent professional experience.
  • Industry Domain: Proven experience working on projects within the Financial Services domain.
  • Key Skills Summary: Mandatory: Java, Microservices, Spring Boot, FIX Protocol, Low-Latency Programming.
  • Fulltime
Read More
Arrow Right
New

Backend Developer

We’re looking for a talented Back-End Developer to help design, build, and maint...
Location
Location
New Zealand
Salary
Salary:
Not provided
chemistwarehouse.com.au Logo
Chemist Warehouse
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong experience with C#, ASP.NET, .NET Core, and SQL Server
  • Experience building enterprise-grade applications, APIs, and integrations
  • Familiarity with .NET 8+, serverless technologies (Azure Functions, GCP Cloud Run), and modern backend patterns
  • Understanding of microservices, event-driven architecture, distributed systems, and GraphQL
  • Experience with Docker, CI/CD pipelines (GitHub Actions, Azure DevOps), and Git workflows
  • Strong knowledge of relational and NoSQL databases
Job Responsibility
Job Responsibility
  • Back-end development — Design, build, and maintain backend services, APIs, and integrations using C#/.NET
  • API & integration development — Build RESTful APIs, integrate with third‑party and internal systems, and maintain secure authentication/authorisation (OAuth 2.0)
  • Code quality — Write clean, testable, well‑documented code and participate in code reviews
  • Agile delivery — Collaborate with cross‑functional teams to deliver features, estimates, and technical insights
  • Support & optimisation — Troubleshoot production issues, improve performance, and maintain scheduled backend jobs
  • Team collaboration — Work closely with NZ and AU teams to support shared architectural standards and contribute to a positive team culture
  • Fulltime
Read More
Arrow Right

Backend Developer

As a global leader in business and technology innovation, we work with top organ...
Location
Location
Greece , Athens
Salary
Salary:
Not provided
nttdata.com Logo
NTT DATA
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Information Systems, or related field (or equivalent experience)
  • Minimum 5 years of hands-on experience Java as well as web development technologies
  • Familiarity with containerization technologies, especially Docker
  • Working experience in JIRA and Confluence
  • Excellent problem-solving skills and attention to detail
  • Ability to collaborate and working productively in a team environment
  • Strong communication skills and ability to manage stakeholders
Job Responsibility
Job Responsibility
  • Develop and maintain Java EE/Spring microservices for large web applications
  • Build containerized Spring Boot applications and contribute to technical analysis and integration
  • Transform requirements into functionalities and follow BDD methodology for code development
  • Ensure solution alignment with client needs, implement integrations, and conduct quality assurance
  • Assist with deployment, configuration management, and early life support for core software tools
What we offer
What we offer
  • Health insurance for the employee and one dependent family member (100% paid by NTT DATA)
  • Meal vouchers of 120€ per month (x12)
  • Corporate mobile phone: subscription & device
  • Teleworking equipment allowance
  • Internal Trainings Platform Account
  • Access to Open Up mental health service
  • 28 days of paid annual leave consisting of your legal holidays and compensation days
  • Fulltime
Read More
Arrow Right

Backend Developer

Location
Location
United Kingdom , London
Salary
Salary:
70000.00 - 90000.00 GBP / Year
signifytechnology.com Logo
Signify Technology
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4+ years experience as a software developer
  • Backend experience with either Java or Kotlin
  • Solid understanding of frontend development (e.g. react) and experience building and maintaining production grade user facing applications
  • Databases expreince such as postgresql or mongodb in scalable, real-world environments
  • AWS experience
  • familiarity with containerisation and infrastructure as code (e.g. docker, terraform)
  • experience designing and maintaining ci/cd pipelines and owning services through the full delivery lifecycle
  • Practical use of AI assisted development tools or automation to improve engineering workflows, with an understanding of associated risks (e.g. security, maintainability)
  • Worked in a regulatory industry
Job Responsibility
Job Responsibility
  • You’ll play a key role as a senior individual contributor, taking ownership of building and evolving a modern, cloud-based product
  • write high-quality, maintainable code across the stack while setting a strong example for engineering standards and best practices
  • work closely with product and leadership to translate business priorities into clear, deliverable technical plans, making balanced decisions around speed, quality and risk
  • improving how software is delivered - identifying bottlenecks and introducing better ways of working, including thoughtful use of automation and AI-assisted development tools
  • help shape engineering practices across code quality, testing, CI/CD and architecture
  • step in on more complex technical challenges, whether that’s performance, scalability or system design
  • contribute to building a culture of continuous improvement
  • Fulltime
Read More
Arrow Right