110 senior software engineer jobs found

💥Our Mission   EverGive fights for two things: a free world and a happy one.   It was originally conceived as the answer to a radical question: What if donations didn’t just get spent? What if they compounded over time and lasted forever instead? EverGive is on a mission to do just that - make donations compound and last forever, building the foundations of a free and happy world.   We are pioneering a model where donations are invested to last forever, creating financial freedom for charities. We use Bitcoin as the vehicle to ensure security, transparency, and long-term growth.   We build on Bitcoin because we believe in freedom. We believe the weaponisation of money is the biggest form of structural control over society. We weaken this structure by restoring sound money (Bitcoin). Bitcoin is a direct threat to authoritarian control because it hands economic sovereignty back to the individual. If a people are economically...

Position: Contract Python Backend Engineer Employment Type: Contract (B2B via Ltd/LLC) Contract Length: until end of December (with potential for extension) Location: Remote (EU/UK-based, GMT timezone) Who We Are YLD is not your typical consultancy. We're a close-knit team of engineers, designers, and thinkers who believe software should leave a legacy—long after we've stepped away. With offices in London, Lisbon, and Porto , we work remotely and globally. Our mission? Empowering clients by helping them build capabilities, not just code. We pride ourselves on putting people first. That means you'll grow here—not just professionally, but personally. About the Project: Our client is a leading force in the media and entertainment industry. We're seeking a skilled Python backend engineer to contribute to take ownership of key initiatives for our client's streaming and media handling platforms. You'll be part of a remote-first team building...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Senior Software Engineer, Web Experience (Contract)   Contract position OUTSIDE IR35 Can offer both remote and onsite options.   Nando’s has been in the UK and Ireland since 1992 and we’ve grown from a single takeaway store in Ealing, London to over 450 restaurants across all locations. Originally started in Johannesburg, South Africa, we pride ourselves on creating memorable experiences for everyone involved in Nando’s: from our employees, communities, founders and suppliers, but most importantly, our customers.   Whilst we always look back on our history and story with pride, the story is still evolving. We have recently been growing our digital capabilities to ensure the Nando’s experience remains relevant to modern-day customers. You will be joining a tech team that has grown in the past few years and is determined to enable change within the restaurant industry by bringing innovative thinking and the...

Senior Software Engineer, Web Experience (Contract)   Contract position OUTSIDE IR35 Can offer both remote and onsite options.   Nando’s has been in the UK and Ireland since 1992 and we’ve grown from a single takeaway store in Ealing, London to over 450 restaurants across all locations. Originally started in Johannesburg, South Africa, we pride ourselves on creating memorable experiences for everyone involved in Nando’s: from our employees, communities, founders and suppliers, but most importantly, our customers.   Whilst we always look back on our history and story with pride, the story is still evolving. We have recently been growing our digital capabilities to ensure the Nando’s experience remains relevant to modern-day customers. You will be joining a tech team that has grown in the past few years and is determined to enable change within the restaurant industry by bringing innovative thinking and the...

Mindera are looking for an experienced Senior Software Engineer focusing on our clients Warehouse Management System (WMS) — a critical platform built around Blue Yonder WMS and Java-based services. Requirements Work on the core system that underpins distribution and stock management across the warehouse network. Enhance and operate a complex Blue Yonder WMS platform, ensuring performance, scalability, and reliability. Develop and maintain Java-based integrations and services supporting the WMS ecosystem. Apply strong knowledge of Oracle databases, including optimisation, performance tuning, and data integrity within transactional systems. Drive continuous improvement through automation, monitoring, and performance optimisation. Collaborate closely with supply chain operations, product, and engineering teams. Contribute to stability and resilience in a high-availability, operationally critical environment. Bring deep technical experience in...

Senior Software Engineer - 2-3 month Contract - Remote UK Logistics Base salary: £450 - £550 per day Employment type: Freelance/Contract Remote working: Remote (no onsite) Work from: Within United Kingdom Working Timezones: (UTC) London +/- 2 hours Visa sponsorship: Not available Job Description 💥Our Mission EverGive fights for two things: a free world and a happy one. It was originally conceived as the answer to a radical question: What if donations didn’t just get spent? What if they compounded over time and lasted forever instead? EverGive is on a mission to do just that - make donations compound and last forever, building the foundations of a free and happy world. We are pioneering a model where donations are invested to last forever, creating financial freedom for charities. We use Bitcoin as the vehicle to ensure security, transparency, and...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Mindera are looking for an experienced Senior Software Engineer focusing on our clients Warehouse Management System (WMS) — a critical platform built around Blue Yonder WMS and Java-based services. Requirements Work on the core system that underpins distribution and stock management across the warehouse network. Enhance and operate a complex Blue Yonder WMS platform, ensuring performance, scalability, and reliability. Develop and maintain Java-based integrations and services supporting the WMS ecosystem. Apply strong knowledge of Oracle databases, including optimisation, performance tuning, and data integrity within transactional systems. Drive continuous improvement through automation, monitoring, and performance optimisation. Collaborate closely with supply chain operations, product, and engineering teams. Contribute to stability and resilience in a high-availability, operationally critical environment. Bring deep technical experience in...

Senior Software Engineer (C#) - Contract Cardiff (Hybrid) Department SYSTEMS DEVELOPMENT Employment Type Contractor Minimum Experience Experienced Compensation Day Rate Join Us at SRT Marine Systems as a Senior Software Developer  Job Title: Senior Software Developer (Edge Team)  Location: 1 day / week in Cardiff office  Job Type: Contract (day rate)   SRT Marine Systems plc (SRT) are a market leader in its domain of international marine surveillance technology and systems. We are respected, established and an ambitious multi-national company headquartered in the UK with a global customer base.  The Edge Team is responsible for developing the next-generation hardware and software platform that forms the outer layer (“edge”) of our wider Maritime Domain Awareness (MDA)...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Position: Contract Python Backend Engineer Employment Type: Contract (B2B via Ltd/LLC) Contract Length: until end of December (with potential for extension) Location: Remote (EU/UK-based, GMT timezone) Who We Are YLD is not your typical consultancy. We're a close-knit team of engineers, designers, and thinkers who believe software should leave a legacy—long after we've stepped away. With offices in London, Lisbon, and Porto , we work remotely and globally. Our mission? Empowering clients by helping them build capabilities, not just code. We pride ourselves on putting people first. That means you'll grow here—not just professionally, but personally. About the Project: Our client is a leading force in the media and entertainment industry. We're seeking a skilled Python backend engineer to contribute to take ownership of key initiatives for our client's streaming and media handling platforms. You'll be part of a remote-first team building...

Mindera are looking for an experienced Senior Software Engineer focusing on our clients Warehouse Management System (WMS) — a critical platform built around Blue Yonder WMS and Java-based services. Requirements Work on the core system that underpins distribution and stock management across the warehouse network. Enhance and operate a complex Blue Yonder WMS platform, ensuring performance, scalability, and reliability. Develop and maintain Java-based integrations and services supporting the WMS ecosystem. Apply strong knowledge of Oracle databases, including optimisation, performance tuning, and data integrity within transactional systems. Drive continuous improvement through automation, monitoring, and performance optimisation. Collaborate closely with supply chain operations, product, and engineering teams. Contribute to stability and resilience in a high-availability, operationally critical environment. Bring deep technical experience in...

Position: Contract Python Backend Engineer Employment Type: Contract (B2B via Ltd/LLC) Contract Length: until end of December (with potential for extension) Location: Remote (EU/UK-based, GMT timezone) Who We Are YLD is not your typical consultancy. We're a close-knit team of engineers, designers, and thinkers who believe software should leave a legacy—long after we've stepped away. With offices in London, Lisbon, and Porto , we work remotely and globally. Our mission? Empowering clients by helping them build capabilities, not just code. We pride ourselves on putting people first. That means you'll grow here—not just professionally, but personally. About the Project: Our client is a leading force in the media and entertainment industry. We're seeking a skilled Python backend engineer to contribute to take ownership of key initiatives for our client's streaming and media handling platforms. You'll be part of a remote-first team building...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Mindera are looking for an experienced Senior Software Engineer focusing on our clients Warehouse Management System (WMS) — a critical platform built around Blue Yonder WMS and Java-based services. Requirements Work on the core system that underpins distribution and stock management across the warehouse network. Enhance and operate a complex Blue Yonder WMS platform, ensuring performance, scalability, and reliability. Develop and maintain Java-based integrations and services supporting the WMS ecosystem. Apply strong knowledge of Oracle databases, including optimisation, performance tuning, and data integrity within transactional systems. Drive continuous improvement through automation, monitoring, and performance optimisation. Collaborate closely with supply chain operations, product, and engineering teams. Contribute to stability and resilience in a high-availability, operationally critical environment. Bring deep technical experience in...

Location Fully remote: open to candidates in North America as well as Europe, the UK, South America, Australia, and New Zealand. About the Role Stellar AI is seeking experienced Software Engineers to contribute to projects across a wide range of technologies and programming languages, including JavaScript, Python, Go, C++, Ruby, and more. This is an open-ended contract opportunity, structured around project-based work with no set schedules or minimum time / task commitments. Contributors who work with us decide which available projects they’d like to work on, when they work, and how much they contribute, which makes it an excellent option for those seeking flexible and high-impact work. In this role, you will help advance AI research by understanding complex systems, exploring large codebases, and developing approaches to verify the correctness of software behavior. Compensation $70 per hour after passing the qualifications Responsibilities Rapidly...

About Us: Based in San Francisco, California, Turing is the world’s leading research accelerator for frontier AI labs and a trusted partner for global enterprises deploying advanced AI systems.   Turing supports customers in two ways: first, by accelerating frontier research with high-quality data, advanced training pipelines, plus top AI researchers who specialize in software engineering, logical reasoning, STEM, multilinguality, multimodality, and agents; and second, by applying that expertise to help enterprises transform AI from proof of concept into proprietary intelligence with systems that perform reliably, deliver measurable impact, and drive lasting results on the P&L.   Project Overview: As a Software Engineering evaluator, you will create cutting-edge datasets for training, benchmarking, and advancing large language models, collaborating closely with researchers. This includes curating code examples, providing precise...

About Us: Based in San Francisco, California, Turing is the world’s leading research accelerator for frontier AI labs and a trusted partner for global enterprises deploying advanced AI systems.   Turing supports customers in two ways: first, by accelerating frontier research with high-quality data, advanced training pipelines, plus top AI researchers who specialize in software engineering, logical reasoning, STEM, multilinguality, multimodality, and agents; and second, by applying that expertise to help enterprises transform AI from proof of concept into proprietary intelligence with systems that perform reliably, deliver measurable impact, and drive lasting results on the P&L.   Project Overview: As a Software Engineering evaluator, you will create cutting-edge datasets for training, benchmarking, and advancing large language models, collaborating closely with researchers. This includes curating code examples, providing precise...

Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial instruments and systems. Bonus...