senior java backend developer

Role: Senior Software Engineer - Backend (Remote) Location: Remote (Work from Anywhere) Job Type: Contract Payout: $50 - $150/hour Role Overview: We are hiring for one of our clients, seeking a Senior Software Engineer to work on a contract basis. The role involves designing, developing, and maintaining high-performance software systems while collaborating...

Company DescriptionVersion 1 has celebrated 30 years in business and continues to be trusted by global brands to deliver technology and transformation solutions that drive customer success. Our deep expertise enables our customers to navigate the rapidly evolving technology landscape. We foster strong partnerships with global technology...

Software Engineer | Building Intelligent Systems That Make an Impact London, Manchester or Cheltenham 4 or 5 days a week on site Existing SC or DV Clearance is required National Security Sector Tech: JAVA/C++/Python - or Devops/Data Background   An exciting opportunity has arisen for a Software Engineer to join a cutting-edge team developing impactful,...

Your newpany You’ll be joining a leading global financial markets organisation undergoing a major technology transformation programme. As part of a brand-new engineering team, you'll help build a next-generation cloud-native platform from the ground up, replacing critical legacy systems with modern, scalable architecture. This is an opportunity to work on...

About this opportunity This role is being recruited by Calyptus on behalf of one of our clients. Calyptus is a specialist recruitment partner helping startups and high-growth technology companies hire across engineering, product and design. What to expect We’ll review your application and, if your experience is a strong match, one of our team will be in...

Core Java Developer Trading Technology90000 + bonusQuant Capital is urgently looking for a Core Java Developer to join our high profile client.The following information aims to provide potential candidates with a better understanding of the requirements for this role.Our client is well known Low Latency Trading liquidity provider and broker. (NO Finance...

Personio's intelligent HR platform helps small and medium-sized organizations unlock the power of people by making complicated, time-consuming tasks simple and efficient. Our team of 1,500 Personios is building user-friendly products that delight our 15,000+ customers and their 1.5 million employees. Ready to make an impact from day one? Senior Software...

Contract Role – Vice President & Senior VP Java Equities– London/Hybrid – 12 months initial We’re seeking a future team member for the role of Vice President & Senior VP Java to join our Equities Engineering team in Execution Services Platform Role Overview: Job Title: Vice President & Senior VP Java Equities Location: London/ Hybrid (4 days...

Teamwork makes the stream work.   Roku is changing how the world watches TV Roku is the #1 TV streaming platform in the U.S., Canada, and Mexico, and we've set our sights on powering every television in the world. Roku pioneered streaming to the TV. Our mission is to be the TV streaming platform that connects the entire TV ecosystem. We connect consumers to...

We are looking for Java developers, from experienced seniors to hands-on principal engineers, to join long-term greenfield projects with a leading financial institution in London. You will be part of small, high-calibre engineering teams delivering strategic rebuilds and modernisation projects, replacing legacy systems with clean, cloud-aligned solutions...

Are you an experienced Senior Software Engineer or Technical Lead who enjoys remaining hands-on while guiding teams and shaping technical solutions? A leading specialist technical consultancy is looking for a Software Technical Lead to join a live Central Government project. You will work within a collaborative Agile team, building bespoke software that...

DescriptionFuse Energy is an energy startup on a mission to make energy abundant and affordable, fast. We combine first-principles thinking with cutting-edge technology to build a radically better energy system.Make your application after reading the following skill and qualification requirements for this position.We've raised over $200M from top-tier...

Mid-Level Software Developer - Android & Backend Location: Hybrid, UK-based, with a preference for candidates who can commute to our Wakefield, West Yorkshire HQ when required Contract: Full-time Salary: £40,000 - £50,000 per annum Department: Engineering About Boxbar Tech Boxbar Tech is an award-winning, high-growth technology company transforming the way...

Backend Engineer (on-site/London) - up to £260k A high-growth blockchain infrastructure company is building the next generation of ultra-fast trading and digital asset platforms, and were looking for an exceptional Backend Engineer to join the London team onsite. If you thrive in high-performance environments, love tackling complex engineering...

Teamwork makes the stream work.   Roku is changing how the world watches TV Roku is the #1 TV streaming platform in the U.S., Canada, and Mexico, and we've set our sights on powering every television in the world. Roku pioneered streaming to the TV. Our mission is to be the TV streaming platform that connects the entire TV ecosystem. We connect consumers to...

Overview We’re searching for a talented, proactive Mid-Level Backend Engineer to join our rapidly growing engineering team. Reporting directly to the CTO, you will play a pivotal role in scaling and enhancing our innovative media platforms. You will work alongside senior developers and cross-functional teammates to deliver robust, high-performance features...

Reference: 4805987Job ID: 5400116Posted: 2026-06-18Closing date: 2026-09-16Location: United KingdomSalary: 77k – 92k (per annum)Job type: PermanentWorking pattern: Full timeIndustry: Scientific and R&D / Software DevelopmentCompany: HaysConsultant: Edward MarshallHays office: Cambridge — 1st Floor, Terrington House, 13 - 15 Hills RoadPhone: Email:...

DescriptionFuse Energy is an energy startup on a mission to make energy abundant and affordable, fast. We combine first-principles thinking with cutting-edge technology to build a radically better energy system.We've raised over $200M from top-tier investors including Balderton, Lakestar, Accel, Creandum, Lowercarbon, Ribbit, 20VC, Hummingbird and...

ABOUT US:LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable...

**Senior Java Engineer – Financial Services** £85,000 – £115,000 + 20% bonus London – Hybrid (1 day per week onsite) Are you a strong, hands-on Java Engineer with experience building high-performance, distributed systems within Banking or Financial Services? We're hiring on behalf of a leading FinTech consultancy that designs and delivers...