**Job Description** Fully _REMOTE_ Mid-level Back-End Developer **Must Have** Minimum of 1-3 years experience

*   Java
*   Maven
*   Git
*   SQL
*   English
*   Experience with Rest, Soap, Xml

**Good To Have**

*   Apache Camel
*   OpenAPI
*   Stoplight
*   RPC
*   Raw TCP Socket interface

**Nice To Have**

*   Atlassian Jira / Confluence
*   Node.js
*   Vue.js
*   Nuxt.js
*   German
*   other languages

**Soft Skills**

*   Detail-oriented, results-driven, and works well within a team environment.
*   Strong problem solving and analytical skills, and experience troubleshooting systems issues.
*   Ability to learn new technologies quickly.
*   Exceptional written and spoken English.

You may also be interested in these job lookouts: https://24-7.support/karriere

Front-End Developer

We are looking for an existing React Native Developer - AI Trainer to help advance AI development. As a member of DataAnnotation’s coding team, you’ll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development. Our platform offers an engaging blend of flexibility and challenge: you’ll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. Some team members fit this work alongside a full-time role, while others treat it as their primary focus, choosing projects and schedules that align with their availability and goals. To get started, once you sign up for an account, you'll take a short assessment (this serves as our version of an interview). If you pass that assessment, you’ll receive an email confirmation, and paid work will become available to you through our platform. **Advantages Of Contracting With Us**

*   You'll be able to choose which projects you want to work on and when
*   You work on your own schedule, on your own computer, from the comfort of your own home
*   Projects are paid hourly starting at $50-$100+/hr, with higher rates available for certain projects

**Responsibilities**

*   Design and solve diverse coding problems used to train AI systems with an emphasis on Android development.
*   Write clear, high-quality code snippets and detailed explanations.
*   Evaluate AI-generated code for accuracy, performance, and clarity.
*   Provide feedback that directly shapes the next generation of AI models.

**Qualifications**

*   Fluency in English (native or bilingual level).
*   Preferred experience in Kotlin. Proficiency in at least one of the following programming languages or frameworks: JavaScript, TypeScript, Python, C, C#, C++, React, Go, Java, or Swift.
*   Excellent writing and grammar skills.
*   A bachelor’s degree (completed or in progress).
*   Previous experience as a Software Developer, Coder, Software Engineer, or Programmer is preferred.

Note: Payment is made via PayPal. We will never ask for any money from you. PayPal will handle any currency conversions from USD. This job is only available to those in the US, Canada, UK, Ireland, Australia, and New Zealand. Those located outside of these countries will not see work or assessments available on our site at this time.This is an independent contractor position. #SWE

React Native Developer - AI Trainer

**About The Opportunity** We are looking for a passionate, hard-working, and talented Senior Full Stack Engineer to join our client's team. You will be working on enterprise-scale digital products within the utilities and energy industry, helping build modern, cloud-native applications that support critical business operations. This is an exciting opportunity to work with cutting-edge technologies in a collaborative and fast-paced engineering environment. **Responsibilities**

*   Design, develop, and maintain scalable web applications using React.js, Node.js, and modern web technologies.
*   Build and maintain RESTful APIs, GraphQL services, and cloud-native solutions using AWS Lambda and Amazon ECS.
*   Develop high-quality, maintainable code while collaborating with designers, engineers, and cross-functional teams.
*   Design and optimize SQL, NoSQL, and graph database solutions to support complex business needs.
*   Participate in technical design discussions, code reviews, and application performance optimization.
*   Mentor fellow engineers while contributing to engineering best practices within an Agile environment.

**Required Qualifications** We know that each person has gone through different career paths that have provided valuable knowledge. If you don't check every box, we still encourage you to apply—your experience is much more than a technology checklist.

*   Solid hands-on experience developing full stack web applications with React.js and Node.js.
*   Strong knowledge of JavaScript (ES6+), HTML5, CSS3, REST APIs, GraphQL, and modern software engineering best practices.
*   Hands-on experience with AWS services, especially Lambda, ECS, and cloud-native application development.
*   Deep knowledge of SQL, NoSQL databases (preferably Couchbase), and graph database concepts.

**Nice To Have Skills** However, if you have the following qualifications, they will be a plus for your application:

*   Experience with TypeScript, Docker, and containerized applications.
*   Knowledge of Jest, React Testing Library, and automated testing practices.
*   Experience with AI-assisted development tools such as GitHub Copilot or prompt engineering.
*   Experience mentoring engineers and working in Agile environments.

_Avenue Code discloses salary range information based on our commitment to fairness and transparency. We consider a wide range of factors such as internal equity, geographic location, relevant education, qualifications, certifications, experience, skills, seniority, business or organizational needs, and others. At Avenue Code, it is not typical for an individual to be hired at or near the top of the range for their role, and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range for this Senior Full Stack Engineer position is up to $82/hour (W2)._

Senior Fullstack Engineer

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? We're working with a dynamic marketplace that connects top-tier developers with hand-picked startups in the US and Europe, handling the business side so you can focus on technical excellence. The Role

*   Work on exciting projects with fast-paced startups
*   Choose a flexible schedule that works best for you
*   Communicate directly with technically-minded clients
*   Experience no micromanagement or screen trackers
*   Receive full support from application through all cooperation stages

What You'll Need

*   4+ years of software development experience
*   3+ years of commercial React.js experience
*   3+ years of commercial Python experience
*   Experience with AWS, Google Cloud Platform, or Azure
*   Strong technical skills and a deep understanding of application architecture
*   Clear and effective advanced English communication skills
*   Strong self-organizational skills for remote work with no supervision
*   Reliability, adaptability, and flexibility to onboard and deliver quickly

What's On Offer

*   Competitive rates based on seniority, skills, and experience
*   No more client hunting or rate negotiation
*   Manual project matching according to your skills and preferences
*   Connect with a community of top developers from over 75 countries

Apply via Haystack today!

React Developer

IgniteAction is seeking an experienced Development Lead/Architect to lead the design and delivery of scalable, high-quality software solutions. This role requires deep experience with modern frontend frameworks (React, Vue.js, or Angular), backend development in Java, JavaScript, Python, or Go, SQL-based data stores, and a strong ability to drive code quality, mentor developers, review pull requests, and optimize system and application performance. **The Core Tech Stack**

*   Frontend: React, Vue.js, or Angular
*   Backend: Java, JavaScript, Python, Go
*   Data: PostgreSQL or SQL

**Key Responsibilities**

*   Feature Architecture: Designing small-to-medium systems
*   Code Quality: Writing clean, testable code
*   Review PRs: Conduct code review before deployment and coach developers on any issues discovered
*   API: Foundational understanding of RESTful or GraphQL APIs that are intuitive for other team members to use.
*   Performance: Identifying and fixing bottlenecks, from slow SQL queries to bloated frontend bundles.
*   Team Development: Coach and mentor mid-junior developers

**Must-Have SkillsSkill AreaWhat’s ExpectedSystem Design** Understanding database normalization, load balancing, and basic microservices. **DevOps** Ability to debug a failing CI/CD pipeline and manage environment variables safely. **Testing** Writing unit tests and End-to-End tests as standard practice. **Soft Skills** Explaining technical trade-offs to product managers and mentoring junior developers. **Requirements:**

*   Bachelor’s degree
*   8 years of experience

**Work Authorization:** Must be a U.S. Citizen and able to obtain or maintain Public Trust (High) clearance. ActioNet is a CMMI-DEV Level 4, CMMI-SVC Level 4, ISO 20000, ISO 27001, ISO 9001, HDI-certified, woman-owned IT Solutions Provider with strong qualifications and expertise in Agile Software Engineering, Cloud Solutions, Cyber Security and IT Managed Services. With 26+ years of stellar past performance, ActioNet is the premier Trusted Innogrator! **Core Capabilities:**

*   Advanced and Managed IT Services
*   Agile Software Development
*   DevSecOps
*   Cybersecurity
*   Health IT
*   C4ISR & SIGINT
*   Data Center Engineering & Operations
*   Engineering & Installation

**Why ActioNet?** At ActioNet, our Passion for Quality is at the heart of everything we do:

*   Commitment to Employees: We are committed to making ActioNet a great place to work and continue to invest in our ActioNeters.
*   Commitment to Customers: We are committed to our customers by driving and sustaining Service Delivery Excellence.
*   Commitment to Community: We are committed to giving back to our community, helping others, and making the world a better place for our next generation.

**ActioNet is proud to be named a Top Workplace** for the twelfth year in a row (2014 - 2025). We have a 98% customer retention rate. We are passionate about the inspirational missions of our customers, and we entrust our employees and teams to deliver exceptional performance to enable the safety, security, health, and well-being of our nation. **What's in It For You?** As an ActioNeter, you get to be part of an exceptional team and a corporate culture that nurtures mutual success for our customers, employees, and communities. We give you the tools to be successful; all you need to do is bring your best ideas, your energy, and a desire to develop your skills, experience, and career. Are you ready to make a difference? ActioNet is an equal-opportunity employer and values inclusion at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. **Full-Time Employees are eligible to participate in our ActioNet’s Benefits Program:**

*   Medical Insurance
*   Vision Insurance
*   Dental Insurance
*   Life and AD&D Insurance
*   401(k) Savings Plan
*   Education and Professional Training
*   Flexible Spending Accounts (FSA)
*   Employee Referral and Merit Recognition Programs
*   Employee Assistance and Identity Theft Protection
*   Paid Holidays: 11 per year
*   Paid Time Off (PTO)
*   Disability Insurance

_ActioNet is an equal opportunity employer and value inclusion at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status._

*   Direct Applicants, only. No Agencies, No third-party recruiters, please\*\*\*\*\*\*\*\*

Development Lead/Architect

This role is part of the **Jobright TNT** - the private hiring network connecting top talent with top AI startups like **Perplexity, Mercor, Cresta, Suno and 150 more.**

This is **not a mass job posting**. Only select, high-signal candidates are invited to Jobright TNT and recommended directly to hiring teams

**Hiring Company:** GPTZero

**One-liner:** An AI detection platform that helps educators and publishers verify whether content was written by humans or AI. Used by over 4M people.

**Salary:** $160K/yr - $250K/yr

Why Join Us:

**Role Responsibilities**

*   Ship intuitive, AI-powered web applications from scratch in React, Node, and Tailwind
*   Build on secure and well-tested API, authentication, and payment flows on our Node.js and SQL backend on AWS
*   Improve our product-led conversion funnel using analytics, user discovery, and latest methods
*   Collaborate on defining the product roadmap with our ML, design, and business teams
*   Establish a deep understanding of our users by meeting with clients and power users from academia, marketing, publishing, and data labeling
*   Design robust software with comprehensive test suites and monitoring

**Qualifications**

Required

*   Led a significant project building end-to-end experiences from backend to UI
*   4+ years of experience with modern JS web frameworks (React.js, Next.js, and Typescript)
*   3+ years of experience with databases (SQL, NoSQL, and text search)
*   Highly motivated to make positive societal impact
*   Wear multiple hats and be a leader as our team grows
*   Bachelors degree in computer science or related field
*   US work eligibility or visa

Preferred

*   strong open-source portfolio
*   experience working in an early-stage startup environment

How can I join Jobright TNT:

If this is your first time applying to a Jobright TNT role, the process works as follows:

1\. Apply to your first Jobright TNT role

2\. We review your background to determine if you meet the TNT quality bar

3\. If qualified, your application is directly recommended to the employer

4\. Once accepted into TNT, you may be:

\- Invited to apply for other exclusive TNT-only roles

\- Invited to private, invite-only hiring events with top startups

You will be notified of your TNT selection result.

PS: All Jobright TNT roles are 100% real, directly hired by top AI startups we partner with, and come with priority review and higher response rates than the normal application queue.

We are looking for an existing React Developer - AI Trainer to help advance AI development. As a member of DataAnnotation’s coding team, you’ll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development. Our platform offers an engaging blend of flexibility and challenge: you’ll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. Some team members fit this work alongside a full-time role, while others treat it as their primary focus, choosing projects and schedules that align with their availability and goals. To get started, once you sign up for an account, you'll take a short assessment (this serves as our version of an interview). If you pass that assessment, you’ll receive an email confirmation, and paid work will become available to you through our platform. **Advantages Of Contracting With Us**

*   You'll be able to choose which projects you want to work on and when
*   You work on your own schedule, on your own computer, from the comfort of your own home
*   Projects are paid hourly starting at $50-$100+/hr, with higher rates available for certain projects

**Responsibilities**

*   Design and solve diverse coding problems used to train AI systems with an emphasis on Android development.
*   Write clear, high-quality code snippets and detailed explanations.
*   Evaluate AI-generated code for accuracy, performance, and clarity.
*   Provide feedback that directly shapes the next generation of AI models.

**Qualifications**

*   Fluency in English (native or bilingual level).
*   Preferred experience in Kotlin. Proficiency in at least one of the following programming languages or frameworks: JavaScript, TypeScript, Python, C, C#, C++, React, Go, Java, or Swift.
*   Excellent writing and grammar skills.
*   A bachelor’s degree (completed or in progress).
*   Previous experience as a Software Developer, Coder, Software Engineer, or Programmer is preferred.

Note: Payment is made via PayPal. We will never ask for any money from you. PayPal will handle any currency conversions from USD. This job is only available to those in the US, Canada, UK, Ireland, Australia, and New Zealand. Those located outside of these countries will not see work or assessments available on our site at this time.This is an independent contractor position. #SWE

React Developer - AI Trainer

**What’s a Senior Software Engineer do?**

A Senior Software Engineer is the next level from a Software Engineer. Here this role can vary, but is typically someone who is largely self directed after work is assigned and is advanced in their domain. They help team members get information they need to be successful while also being the go-to person for peer reviews in their domain. They have a solid understanding of the product strategy and can recommend solutions to critical issues when needed, assist junior engineers in risk management and escalation, and advocate for and implement changes that affect their team. A Senior Software Engineer actively seeks opinions and ideas from their team members, including those with varied experiences and perspectives to improve more collective results.

**Important Requirements:**

Candidates must currently be located in United States.

No visa sponsorship is available for this role.

C2C (Corp-to-Corp) candidates will not be considered

**What you’ll do:**

• Build high quality user interfaces for Firefox with accessibility and usability in mind

• Write code and tests, build prototypes, tackle problems with no clear solution, collaborate with other designers and engineers to make the web a better place

• Learn about a wide variety of problems and solutions across a large, mature codebase

• Work with cross functional teams, building relationships and fostering collaboration to reach shared goals

• Help to level-up the skills of your fellow engineers through code reviews, giving talks, and/or writing documentation

• Promote and maintain high standards of code-quality, focusing on performance, testing, security, usability, accessibility and maintainability

• Work with driven, committed team members to bring the open web to people around the world

• Contribute to improving engineering practices and procedures

**What you’ll bring:**

• 6+ years experience as a software engineer

• You have a background in shipping high quality software

• 5+ years working experience with Vanilla JavaScript, HTML, and CSS

• Interest in and ability to work with a distributed team (requires good asynchronous written communication skills as well as good verbal communication skills)

• Happy to provide and receive constructive feedback

• Will contribute by asking questions and proposing new ideas

• A love of working with others collaboratively

• Commitment to our values:

? Welcoming differences

? Being relationship-minded

? Practicing responsible participation

*   ? Having grit

Frontend Developer

We are looking for an existing Frontend Developer - AI Trainer to help advance AI development. As a member of DataAnnotation’s coding team, you’ll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development. Our platform offers an engaging blend of flexibility and challenge: you’ll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. Some team members fit this work alongside a full-time role, while others treat it as their primary focus, choosing projects and schedules that align with their availability and goals. To get started, once you sign up for an account, you'll take a short assessment (this serves as our version of an interview). If you pass that assessment, you’ll receive an email confirmation, and paid work will become available to you through our platform. **Advantages Of Contracting With Us**

*   You'll be able to choose which projects you want to work on and when
*   You work on your own schedule, on your own computer, from the comfort of your own home
*   Projects are paid hourly starting at $50-$100+/hr, with higher rates available for certain projects

**Responsibilities**

*   Design and solve diverse coding problems used to train AI systems with an emphasis on Android development.
*   Write clear, high-quality code snippets and detailed explanations.
*   Evaluate AI-generated code for accuracy, performance, and clarity.
*   Provide feedback that directly shapes the next generation of AI models.

**Qualifications**

*   Fluency in English (native or bilingual level).
*   Preferred experience in Kotlin. Proficiency in at least one of the following programming languages or frameworks: JavaScript, TypeScript, Python, C, C#, C++, React, Go, Java, or Swift.
*   Excellent writing and grammar skills.
*   A bachelor’s degree (completed or in progress).
*   Previous experience as a Software Developer, Coder, Software Engineer, or Programmer is preferred.

Note: Payment is made via PayPal. We will never ask for any money from you. PayPal will handle any currency conversions from USD. This job is only available to those in the US, Canada, UK, Ireland, Australia, and New Zealand. Those located outside of these countries will not see work or assessments available on our site at this time.This is an independent contractor position. #SWE

Frontend Developer - AI Trainer

**Frontend JavaScript Engineer (AI Training)About The Role** What if your JavaScript expertise could directly influence how AI writes and understands code for millions of developers around the world? We're looking for experienced Frontend JavaScript Engineers to evaluate, critique, and improve AI-generated code — helping ensure the next generation of AI tools actually thinks like a great engineer. This is a fully remote, flexible contract role. Training and onboarding support will be provided — no prior AI experience needed. Just bring your deep knowledge of JavaScript and a sharp eye for quality code.

*   Organization: Alignerr
*   Type: Hourly Contract
*   Location: Remote
*   Commitment: 10–40 hours/week

**What You'll Do**

*   Evaluate AI-generated JavaScript code for correctness, efficiency, and adherence to modern ES6+ standards
*   Assess DOM manipulation approaches and identify performance issues or anti-patterns
*   Solve complex UI/UX challenges to test the model's ability to produce responsive and interactive frontend solutions
*   Identify bugs and suboptimal patterns in AI-generated frontend logic and provide clearly optimized alternatives
*   Write human-readable documentation explaining state flow, event handling, and code structure
*   Work independently and asynchronously — fully on your own schedule

**Who You Are**

*   Deep, hands-on knowledge of core JavaScript concepts — async/await, closures, the event loop, and DOM manipulation
*   3–5 years of practical experience with modern frameworks such as React, Vue, or Node.js
*   Strong instincts for clean, maintainable, and efficient frontend code
*   Naturally detail-oriented with a systematic approach to evaluating and improving code quality
*   Clear written communicator who can explain technical reasoning in plain terms
*   Bachelor's degree in Computer Science or a related technical field preferred

**Nice to Have**

*   Experience with data labeling, RLHF, or other AI training or evaluation projects
*   Familiarity with testing frameworks, code review workflows, or frontend performance profiling
*   Background in technical writing or code documentation

**Why Join Us**

*   Work on cutting-edge AI projects alongside leading AI research labs and teams
*   Fully remote and flexible — work when and where it suits you
*   Freelance autonomy with the structure of meaningful, task-based engineering work
*   Make a direct, tangible impact on how AI understands and generates JavaScript code
*   Potential for ongoing work and contract extension as new projects launch

Front-End Developer

Job Description

Apply now

Key & Card AG - Einfach. Genial. Digital.

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