Backend Developer Jobs in Londonderry, NH

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ADA Accessibility Developer---Front End

Allwyn Corporation

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Remote

Contract, Third Party

Position: Mobile & Web Developer with Angular/Ionic + ADA Location: Remote Duration: 4+ months Job Description: We are looking for a skilled Front-End Developer who can contribute across both mobile and web (.com) platforms. The ideal candidate will have hands-on experience with Angular and Ionic frameworks, and a strong understanding of ADA compliance to ensure accessibility standards are met across all digital experiences. Responsibilities: Develop and maintain responsive and accessible applic
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Posted 1 day ago

Senior Backend Engineer

Kforce Technology Staffing

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Remote or Orlando, Florida, USA

Full-time

RESPONSIBILITIES: Kforce is working with a client in search of a Senior Backend Engineer to join their team! This position is full-time, direct hire and remote with the ability to work PST hours. Summary: As a Senior Backend Engineer, you will design, build, and maintain the core services, APIs, and integrations that power our platform. You'll collaborate with world-class engineers to deliver resilient, high-performance systems. Responsibilities: * Senior Backend Engineer will design, build, a
Posted 49 days ago | Updated 4 hours ago

Python Backend Engineer

ACL Digital

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Remote or San Jose, California, USA

Full-time

Job Title: Python Backend Engineer - Systems & Integration Location: Remote bout We are building a next-generation virtual assistant platform that enables natural and responsive voice and chat-based interactions. The platform integrates with internal and external systems to deliver seamless, real-time user experiences at scale. s part of our growing team, we're looking for a skilled Python Backend Engineer to help us build reliable, high-performance backend systems. Role Overview: This role inv
Posted 35 days ago | Updated 10 hours ago

Mobile & Web Developer with Angular/Ionic + ADA

Allwyn Corporation

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Remote

Third Party, Contract

Job Title: Mobile & Web Developer with Angular/Ionic + ADA Location: Remote Job Overview We are looking for a skilled Front-End Developer who can contribute across both mobile and web (.com) platforms. The ideal candidate will have hands-on experience with Angular and Ionic frameworks, and a strong understanding of ADA compliance to ensure accessibility standards are met across all digital experiences. Responsibilities: Develop and maintain responsive and accessible applications across mobile
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Posted 19 days ago

Full Stack Developer

Maximus, Inc.

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Remote

Full-time

Description & Requirements Provides subject matter proficiency for work described in the task. Responsible for providing analytical skills to support process improvement, specialized studies, and definition of requirements. Typical duties include analysis, planning, developing requirements documents, building functional models, developing procedures, developing functional architectures, and other related management and technical duties. Requires expertise in specialty areas. Back-End Software D
Posted 14 days ago | Updated 12 hours ago

Back-End Software Engineer (Contractor)

Dimensional Fund Advisors LP

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Texas, USA

Full-time

Notes to applicants: Dimensional sees great value from collaborating in our offices and appreciates the benefits of flexibility. Most roles fit our office-first hybrid approach: We are together on our campuses Tuesdays, Wednesdays, and Thursdays and have the choice to work in the office or remotely, depending on what is best for that work day, on Mondays and Fridays. This approach maximizes in-person collaboration and interaction while simultaneously providing flexibility and applies to most rol
Posted 30 days ago | Updated 11 hours ago

Software Engineer

UKG Careers

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Lowell, Massachusetts, USA

Full-time

Company Overview With 80,000 customers across 150 countries, UKG is the largest U.S.-based private software company in the world. And we're only getting started. Ready to bring your bold ideas and collaborative mindset to an organization that still has so much more to build and achieve? Read on. At UKG, you get more than just a job. You get to work with purpose. Our team of U Krewers are on a mission to inspire every organization to become a great place to work through our award-winning HR techn
Posted 60+ days ago | Updated 11 hours ago

React Native Mobile Architect

Aptino

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Remote

Contract, Third Party

Job Description:We are seeking a highly skilled and experienced Senior React Native Developer / Mobile Architect to join our mobile development team. The ideal candidate will have a proven track record of building scalable and high-performance mobile applications using React Native and related technologies. You will be responsible for leading mobile architecture decisions, implementing robust features, and ensuring seamless cross-platform user experiences. Key Responsibilities:Design, develop, a
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Posted 12 days ago | Updated 10 hours ago

Sr. Backend Engineer/Solutions Architect

LogiX-Guru

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Remote

Contract

Senior Backend Engineer / Solutions Architect (Node.js | Google Cloud Platform | TypeScript | Finance) Location: Remote Type: Full-time | Contract Client Industry: Financial Technology Key Responsibilities - Design and implement fraud prevention systems using Node.js and TypeScript - Develop and enhance device authentication mechanisms - Build payment intercept systems and fraud detection features - Integrate with Google Cloud Platform services (Spanner, BigQuery, Kubernetes) - Collaborate with
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Posted 13 days ago | Updated 16 hours ago

Principal Engineer Cybersecurity, Cloud Security

URSI Technologies Inc.

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Remote

Contract

Job Title: Principal Engineer Cybersecurity, Cloud Security & High-Performance Systems Location: Remote (California) Duration: 12+ Months Role Overview: We are seeking a Principal Engineer with deep expertise in Cybersecurity, Secure Cloud Architectures, and High-Performance Systems. This role focuses on developing next-generation security platforms, real-time threat detection, and secure cloud services using Rust, Scala, and WebAssembly (WASM) on AWS. Key Responsibilities: Develop secure, perf
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Posted 13 days ago | Updated 13 hours ago

Senior UI Developer

ST RXR Investments LLC

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Remote or Miami Beach, Florida, USA

Full-time, Third Party

Job Title:Senior UI Developer (3+ Years of Experience) Compensation: Up to 300k depending on experience. Location:Miami Beach, FL [Remote is Optional] Company:ST RXR Investments LLC Job Type:Full-time About Us:We are one of the two pioneers of high frequency automated trading, and a dynamic and innovative Hedge Fund focused on building a new cutting-edge high frequency, algorithmic trading platform. Our team is developing a trading interface integrated via API, designed to offer high-performance
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Posted 26 days ago | Updated 14 days ago

Team Lead, Java Developer

Govincorp

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Remote

Full-time

Seeking a highly skilled Team Lead, Java Developer to guide and mentor a team of developers in delivering high-quality backend services and APIs. The ideal candidate will possess strong technical expertise in Java, Go, PHP, Node.js, and MySQL, along with solid experience managing development teams and collaborating across functions to deliver scalable solutions. This position is 100% remote Responsibilities: Lead and manage a team of backend developers, providing technical direction and mentori
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Posted 15 days ago | Updated 1 day ago

Software Engineer, Backend

West Coast Consulting LLC

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Remote

Contract

Job Description Backend Engineer Remote Automation: designing and implementing systems to automate manual processes, with clear error handling, observability, and fallback mechanisms.Optimized Content Classification: integrating LLMs to parse through terabytes of content, classifying it, and refining over multiple rounds of processing.Systems Architecture: We need automation solutions that will stand the test of time within the broader Reddit ecosystem, and can be used for future classification
Posted 5 days ago | Updated 7 hours ago

Senior Backend Engineer (Node.js + TypeScript) - AI meets FinTech

HENRY

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Remote

Full-time

** Remote position ** Engineering scrums are at 9am EST Who We AreWe re a highly funded stealth startup that has built an institutional grade licensed exchange for trading illiquid real-world assets from commercial real estate to infrastructure, natural resources, and private credit. We re combining AI, deep regulatory infrastructure, and a modern tech stack to unlock trillions in global illiquid markets. What We re Looking ForWe re looking for a Senior Backend Engineer with strong experience bu
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Posted 13 days ago

BE Crypto Software Engineer

Russell, Tobin & Associates

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Remote

Contract

Job Title: Crypto Software Engineer Location: Remote California Duration: 6 Months plus Pay Range: $58/hr-$65/hr on W2 JOB DESCRIPTION Join the User Economy team in this contractor role, working on an exciting initiative that enables users to earn money through various company products such as Awards, Premium, Collectible Avatars, and more. We're redefining how users engage with and monetize their contributions, shaping the future of the company's creator ecosystem. We are specifically hiring a
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Posted 4 days ago | Updated 5 hours ago

Senior React Developer

Redhorse Corporation

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Remote

Full-time

About the Organization Now is a great time to join Redhorse Corporation. Redhorse specializes in developing and implementing creative strategies and solutions with private, state, and federal customers in the areas of cultural and environmental resources services, climate and energy change, information technology, and intelligence services. We are hiring creative, motivated, and talented people with a passion for doing what's right, what's smart, and what works. About the Role Redhorse transf
Posted 6 days ago | Updated 7 hours ago

Staff iOS Engineer, Banking Mobile

Block Inc

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California, USA

Full-time

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn't work together. So we expanded into software and started building integrated, omnichannel solutions - to help sellers sell online, manage inventory, offer buy now, pay later functionality, book appointments, engage loyal buyers, and hire and pay staff. Across
Posted 16 days ago | Updated 11 hours ago

Java Swing Developer

Kforce Technology Staffing

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Remote or Salt Lake City, Utah, USA

Contract, Third Party

RESPONSIBILITIES: Kforce has a client in Salt Lake City,. UT that is seeking a Java Swing Developer. Summary: We are seeking a skilled Java Developer with strong experience in Java Swing, Oracle and JavaFX to support the development and enhancement of desktop-based software applications. This role will involve designing and implementing user interfaces, integrating back-end logic, and ensuring responsive, user-friendly application performance. Responsibilities: * Design, develop, and maintain
Posted 1 day ago | Updated 3 hours ago

Sr Frontend Engineer

Ranger Technical Resources

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Remote

Full-time

Sr Front End Engineer #2487 Position Summary: Our partner, a leading SaaS provider of unified IT operations solutions, is seeking a Senior Front-End Engineer to join their team. As a Senior Engineer, you will bring technical expertise to the end-to-end design and development of innovative products and applications. We re looking for a motivated, passionate engineer with strong experience in React and modern front-end technologies to join the team. Your contributions will be pivotal in shaping ou
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Posted 27 days ago | Updated 1 day ago

Angular UI Architect

Bramkas Inc.

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Remote

Contract

Angular UI Architect Location: United States RemotePosition Type: Contract / Contract-to-Hire (CTH)Experience Level: 12+ yearsJob Summary We are seeking a hands-on Angular Architect / Senior Lead with strong technical depth and client-facing experience. The ideal candidate will be skilled in building scalable, high-performance web applications using Angular (v10+) and related technologies. This role involves leading from the frontworking on critical features, setting standards, collaborating wi
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Posted 49 days ago | Updated 5 days ago