April 11, 2026
Backend PHP Developer - fully remote - Cybersecurity sector
Mid • Remote
3,300 - 4,000 GBP
Witney, United Kingdom
About CYJAX
CYJAX is a Cyber Threat Intelligence company that provides a cyber security platform to enable both small and large organisations to quantify and manage their external cyber risk. Our vision is to make threat intelligence accessible to everyone, by providing real-time, straightforward, actionable threat intelligence tailored to specific business needs.
We do this through a host of technologies designed to perform both automated and manual sourcing of threat intelligence, alongside advanced analytical features that enable business entities to conduct analysis and generate outputs in the form of alerts, reports, or data feeds.
CYJAX is in a period of expansion of which the Development Team are at the core; we are looking for a Developer to join our Development Team and contribute to our growth. Our core values at CYJAX are Be You, Innovate, Deliver, Build Relationships and Evolve; we are looking for an individual who can work on our core technologies to help us reach our goals.
Your Responsibilities
As Backend Developer, you will work closely with other members of Development Team on our tech stack and projects.
What you’ll be doing:
Design, develop, and maintain scalable, secure, and high-performance backend applications using PHP.
Build and optimize RESTful APIs and microservices to support application functionality.
Collaborate with other developers to implement and test features for web platforms and applications.
Work with applications deployed on AWS-based infrastructure.
Occasionally contribute to frontend development in our Next.js application.
Debug and troubleshoot issues across the codebase.
Participate in code reviews and technical discussions to improve code quality and share knowledge.
Continuously learn and apply new technologies and best practices.
Monitor and troubleshoot data workflows to ensure smooth operations.
-
Contribute to maintaining system security and compliance with ISO 27001 and best practices.
What You Should Bring
We’re looking for a capable and experienced developer with the following qualifications:
3+ years of experience in backend development, with strong proficiency in PHP.
Experience with PHP frameworks, preferably Laravel.
Solid understanding of software development principles and best practices.
Strong problem-solving skills and a willingness to ask questions and seek guidance when needed.
Experience with relational databases (MySQL) and familiarity with NoSQL systems (e.g., Elasticsearch).
Good understanding of web technologies, including HTML, CSS, and JavaScript/TypeScript (React is a plus).
Experience with AWS or other cloud platforms is a plus.
Understanding of SaaS architecture, microservices, and distributed systems.
Ability to analyse complex issues and independently propose effective solutions.
Familiarity with the software development lifecycle, including version control, issue tracking, and CI/CD pipelines.
Strong communication skills and a collaborative mindset.
Curiosity and willingness to learn new tools and technologies.
Ability to effectively use AI tools to support development workflows.
-
Professional working proficiency in English.
Benefits
Home working/flexible opportunities
Supportive company and positive team culture
Opportunity to join an innovative and quickly growing business
CYJAX is an equal opportunity employer. We encourage applications from candidates of all backgrounds and experiences.
Interview Process (conducted online via Microsoft Teams):
We aim to complete the process within 2 weeks. Applications will be reviewed on a rolling basis, and the position may be filled before the closing date if a suitable candidate is found.
1) Introductory Call
Learn about our company and culture, with an opportunity to ask questions. Introduce yourself.
2) Code Assessment
Candidates whose profiles closely match what we're looking for will be invited to complete a take-home coding exercise. The assessment takes approximately 2 hours and can be done at your convenience within the provided deadline.
3) Technical Interview
Candidates with strong assessment results will be invited to a video interview. This conversation will cover both technical and soft skills, and is also a chance to learn more about our team, culture, and how we work.
To apply for this role, please upload your CV to the job board or email your CV directly to jobs@cyjax.com
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Krakow, Poland
6,200 - 7,700 USD
🏢 Summary: Lead FullStack Engineer role focused on building and scaling high-traffic, public-facing web platforms for a major European online marketplace. The position involves full SDLC ownership, AI-assisted development, and delivering highly available, performance-optimized solutions using modern cloud and frontend technologies. Work includes backend and frontend development, cloud infrastructure, CI/CD, and integration of AI frameworks into the development workflow. 🗂️ Requirements: 5+ years of experience building reliable, scalable software systems, Strong knowledge of software architecture and design patterns, Proficiency in C# and TypeScript, Strong experience with SQL and NoSQL databases, Strong frontend development experience (HTML, CSS, JavaScript), Experience with React, Next.js, Vue.js or Angular, Experience with AI tools (ChatGPT, Codex) in development workflows, Experience with AI frameworks (Vercel AI SDK, LangChain), Experience with AWS, Terraform, Docker, Experience building and consuming APIs in service-based architectures, Experience with CI/CD pipelines, Experience with logging and monitoring tools (Datadog, NewRelic), Strong unit testing skills (backend and frontend), Experience with Git, Upper-intermediate English, Availability to work in required time zone (ET or 13:00–21:00 EET) 📃 Skills: C#, TypeScript, SQL, NoSQL, GraphQL, Redis, HTML, CSS, JavaScript, React, Next.js, Vue.js, Angular, ChatGPT, Codex, LangChain, Vercel, AWS, Terraform, Docker, Git, CI/CD, Datadog, NewRelic 🏢 Description: Аbout us: N-iX i s a software development service company that helps businesses across the globe develop successful software products. Founded in 2002 in Lviv, N-iX has come a long way and increased its presence in eight countries Poland, Ukraine, Sweden, Bulgaria, Malta, the UK, the US, and Colombia. Today, we are a strong community of 2,000+ professionals and a reliable partner for global industry leaders and Fortune 500 companies. About the client: Our customer is the European online car market, with over 30 million monthly users and a presence in 18 countries. As a Lead FullStack Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers. Responsibilities: Developing fast, high-traffic public-facing websites Explore new technologies and help the team to use them Work using AI tools and apply them to the SDLC Following software development best practices while delivering the work Following testing principles while testing your own code to ensure production readiness Follow the philosophy of: you-build-it-you-run-it (be responsible for the SDLC processes) Requirements: 5+ years developing reliable, highly available, and scalable software systems Strong understanding of software architecture and design patterns Firm grasp of clean code principles and coding standards Strong proficiency using AI tooling, such as ChatGPT/Codex, for rapid development Experience integrating AI tooling into your development environment for streamlined usage Experience with AI Frameworks like Vercel AI SDK, LangChain, etc. Strong proficiency with the following technologies: C#+Typescript Strong proficiency with SQL & NoSQL datastores (GraphQL, Redis) Strong proficiency with frontend development (HTML, CSS, JavaScript) Strong proficiency with component-based frameworks and SSR (Next.js/React or Vue.js) or Angular with the desire to learn React/ Vue.js. Hands-on experience developing and maintaining 3rd party content management systems Knowledge of modern cloud infrastructures and tools, such as AWS, Terraform, and Docker Experience with APIs and developing in a service-based application environment Experience building optimized UIs for performance Proficiency with version control systems such as Git Experience working within a formal CI/CD pipeline Experience with logging, monitoring, and alerting services like Datadog, Newrelic Solid approach to testing and ensuring quality of code, Unit testing, backend, and frontend At least Upper-intermediate English level This role requires mandatory timezone coverage: work must align with the Toronto (ET) timezone for LATAM hours and 13:00–21:00 EET for EU hours approximately. We offer*: Flexible working format - remote, office-based or flexible A competitive salary and good compensation package Personalized career growth Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing Education reimbursement Memorable anniversary presents Corporate events and team buildings Other location-specific benefits *not applicable for freelancers
Technology
ITDS
Senior Python & Node.js Backend Engineer – Security Platform
Senior
Hybrid
Krakow, Poland
26,250 - 29,400 PLN
🏢 Summary: Senior Backend Engineer role focused on building secure, scalable backend services in Python and Node.js for advanced cybersecurity platforms. The position involves architecting and operating cloud-native solutions on GCP, optimizing databases, and implementing secure authentication flows. You will drive automation, reliability, and best practices in a hybrid Krakow-based environment. 🗂️ Requirements: Minimum 6 years backend development experience, Expertise in Python, Expertise in Django, Expertise in Node.js, Expertise in TypeScript, Experience with NestJS, Hands-on experience with GCP services, Experience with GKE, Experience with Cloud Run, Experience with Pub/Sub, Experience with Terraform, Strong knowledge of security principles, Experience implementing OAuth2, Experience implementing OpenID Connect, Experience with PostgreSQL, Ability to design scalable backend systems, Fluent English, Legal right to work in the EU 📃 Skills: Python, Django, Node.js, TypeScript, NestJS, GCP, GKE, CloudRun, PubSub, PostgreSQL, Terraform, OAuth2, OpenIDConnect, Go, Rust, Filestore 🏢 Description: Unleash innovation in security — shape the future of cyber defense! Krakow-based opportunity with hybrid work model As a Senior Python & Node.js Backend Engineer , you will be working for our client, a leading player in the cybersecurity industry, dedicated to building cutting-edge security platforms that protect organizations worldwide. You will contribute to developing innovative solutions that enhance digital safety, automation, and reliability—driving the next generation of security technology. Your main responsibilities: Hands-on development of high-quality, production-grade backend services in Python (Django) and Node.js (TypeScript/NestJS). Architect scalable, secure solutions on Google Cloud Platform (GKE, Cloud Run, Pub/Sub) and optimize PostgreSQL database performance. Lead the lifecycle management of cloud-native services, ensuring resilience, observability, and cost-efficiency. Design and implement OAuth2/OpenID Connect flows within GCP environments. Translate business opportunities into effective technical solutions. Develop automation to improve deployment, monitoring, and maintenance processes. Mentor team members and promote engineering best practices. Stay updated with the latest industry trends and share knowledge across teams. You're ideal for this role if you have: At least 6 years of experience in backend development or related fields. Deep expertise in Python (Django) and Node.js (TypeScript/NestJS). Hands-on experience with GCP services (Cloud Run, GKE, Filestore) and Infrastructure as Code (Terraform). Strong understanding of security principles, including zero trust models. Ability to build scalable, high-performance backend services, including some experience with Go or similar languages. A full-stack understanding with a focus on backend systems. Proven track record of creating secure, reliable, and efficient backend solutions. Demonstrated mastery in your technical discipline and a passion for engineering excellence. It is a strong plus if you have: Experience with Go, Rust, or other emerging languages. The ability to identify problems or opportunities and engineer effective solutions. Respected for your craftsmanship, not just your ideas. A holistic view to complex problem solving. Language Required for the role: Fluent English (written and spoken) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
Technology
Jacobs
Technical Lead Applications Engineer
Senior
Hybrid
Krakow, Poland
🏢 Summary: Hands-on Technical Lead Applications Engineer role focused on backend development of SaaS web applications and analytics data pipelines, with responsibility for architectural decisions and technical leadership. The position combines coding, system design, performance optimization, and cross-team coordination to deliver scalable, customer-facing products. It involves mentoring engineers and ensuring high-quality releases in a cloud-based environment. 🗂️ Requirements: BS/MS in Computer Science, Mathematics or Engineering, 7+ years of software engineering experience in a product company, 5+ years of experience developing web-based SaaS applications, Strong backend development experience, Proficiency in Python or Java or C++ or Ruby, Proficiency in SQL, Experience with relational databases, Experience with data pipelines, Experience with data streaming technologies, Experience with batch processing, Experience with AWS or Google Cloud, Experience in frontend and backend web development, Experience with automated unit testing, Experience conducting code reviews and technical design reviews 📃 Skills: Python, Java, C++, Ruby, SQL, AWS, GoogleCloud, SaaS, Databases, DataPipelines, DataStreaming, BatchProcessing, UnitTesting, WebDevelopment, Cloud 🏢 Description: At Jacobs , we're embarking on an exciting journey as we initiate the development of our Digital & Data Hub in the heart of Krakow. Our mission is to undertake projects spanning various industries, including Consumer and Manufacturing, Defence and Security, Energy and Utilities, Financial Services, Government and Public Services, Health and Life Sciences, and Transport. Jacobs has acquired StreetLight Data, a mobility analytics solution provider - marking the company’s second strategic acquisition in recent months and building on its strong foundation of existing technology and data capabilities. We are looking for a highly skilled Technical Lead Applications Engineer to join our growing team. This is a hands-on leadership role, primarily focused on back-end development of our SaaS web applications, with occasional involvement in front-end tasks. Beyond coding, you will set the technical direction for the team, make key architectural decisions, mentor junior engineers, and coordinate cross-team efforts to ensure high quality delivery. Key Responsibilities: Design, implement, and maintain customer-facing features, including both frontend and backend components, in the StreetLight SaaS web applications (InSight Planning and Insight Operations) and their analytics data pipeline Provide technical leadership and drive architectural decisions to ensure code quality, performance, and scalability Strong backend development experience including proficiency with relational databases Author and review technical designs, conduct thorough code reviews to uphold engineering excellence Deliver product releases and fixes to production as needed Interface among our San Francisco, Vancouver, Bangalore, and Eastern European teams, and mentor more junior engineers Write automated unit tests and participate in peer design and code reviews Collaborate as needed with the other developers and QA engineers on the team, as well as with Product Management Productize analytics models from the Data Science and Data Engineering team Tune StreetLight InSight Planning and Streetlight Insight Operations for performance, scalability, and reliable operation to serve our growing customer base Assist Support and Operations in resolving production issues when needed, and improve the product to avoid them in the future Here's what you'll need BS/MS in Computer Science, Mathematics, or an Engineering discipline from a top university 7+ years of experience as a Software Engineer at a software product company, preferable in an enterprise market 5+ years of experience developing web-based SaaS applications Competence and experience in both frontend and backend web development Strong problem solving and solution design skills Proficiency in Python (Java, C++ or Ruby experience can substitute for Python in a candidate who is open to learning new technologies) Proficiency in SQL and working with relational databases Competence and experience in handling data pipelines including experience with data streaming technologies and batch processes Experience working in cloud-deployed platforms such as AWS, Google Cloud Product and customer orientation Good communication skills - both written and verbal Quick learner, and a strong team player We offer: Rewarding employment: Full-time employment with a salary that matches your qualifications Hybrid work model: Enjoy the flexibility of working from home, with just several office days per month Comprehensive benefits: Including Lux Med medical care, psychological support, life insurance, My Benefit cafeteria system, Multisport card co-financing, and a car/bike park sharing system Co-financed holidays: Enjoy "Wczasy pod Gruszą" for a well-deserved break Global projects: Engage in exciting international projects Inclusive networks: Join our diverse employee networks like Women's Network, OneWorld, PRISM, Careers Network, Green Team, SpeakUp, Collectively, and more Continuous learning: Participate in our Graduate Development Program, Learners’ Community, and self-learning platforms Language courses: Enhance your skills with courses in English, German, and Polish We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disabilities, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. Find out more about life at Jacobs. As a Disability Confident employer, we will interview all disabled applicants who meet the criteria for a vacancy. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team recruitmentpoland@jacobs.com
Technology
Jacobs
Full-stack Developer (Node.js/Angular/Typescript)
Mid
Hybrid
Krakow, MA, Poland
🏢 Summary: Full-stack Developer role focused on stabilizing and modernizing an acquired application by working across Angular frontend and Node.js backend. The position involves rebuilding the frontend in TypeScript, resolving critical issues, and implementing new features using cloud-native and serverless solutions on GCP. The role supports architectural improvements and platform scalability within a modern CI/CD-driven environment. 🗂️ Requirements: Minimum 3 years of professional experience as Software Developer, Experience with Angular, Proficiency in JavaScript and TypeScript, Backend development experience with Node.js, Experience with cloud platforms (GCP, AWS or Azure), Understanding of REST APIs and asynchronous programming, Experience with NoSQL databases, Experience with serverless/cloud runtimes, Ability to work with and modernize legacy code, Willingness to participate in on-call rotation 📃 Skills: Angular, TypeScript, JavaScript, Node.js, GCP, CloudRun, CloudFunctions, Firestore, REST, NoSQL, CI/CD, APIs, AWS, Azure 🏢 Description: We are looking for a Full‑stack Developer to join the Digital & Data Hub in the Jacobs Krakow office and support the stabilization and further development of an acquired application. You will work across both the frontend and backend, helping resolve critical issues, participate in rebuilding the frontend into TypeScript, and support the introduction of new features and architectural improvements. This role is ideal for someone with solid hands‑on development skills who wants to grow while contributing to impactful platform modernization. Responsibilities: Develop and maintain frontend and backend features using Angular (migrating toward TypeScript ) and Node.js (TypeScript/JavaScript) Support stabilization efforts by diagnosing and resolving defects, performance issues, and architectural bottlenecks Participate in the redesign and refactor of existing components, including modernizing monolithic services Contribute to rebuilding the frontend into a more maintainable and scalable TypeScript‑based structure Implement backend logic using GCP Cloud Run and Cloud Functions Work with Firestore (NoSQL) to build efficient and reliable data workflows Collaborate closely with DevOps and architecture teams on platform improvements Work with modern development practices such as code reviews, unit testing, and CI/CD Ensure compliance with security and authentication standards (GCP-based authentication already implemented) Here's what you'll need: Min. 3 years of professional experience as a Software Developer Practical experience with Angular and JavaScript/TypeScript Solid knowledge of backend development using Node.js Experience with cloud‑based development (preferably GCP, AWS or Azure also acceptable) Understanding of APIs, REST principles, asynchronous programming, and cloud-native patterns Experience working with NoSQL databases ( Firestore is a plus) Familiarity with serverless/cloud runtimes (Cloud Functions, Cloud Run, Lambda, etc.) Willingness to work with legacy code and contribute to modernization Strong problem‑solving skills and ownership mindset Willingness to participate in an on-call rotation, including after-hours support for critical production incidents We offer: Rewarding employment - full-time employment with a salary that matches your qualifications Hybrid work model - enjoy the flexibility of working mostly from home Flexible hours - start your day anytime between 7:30 and 10:00 AM Comprehensive benefits, including Lux Med medical care, psychological support, life insurance, My Benefit cafeteria system, Multisport card co-financing, and a car/bike park sharing system Co-financed holidays - enjoy "Wczasy pod Gruszą" for a well-deserved break Global projects - engage in exciting international projects Inclusive networks - join our diverse employee networks like Women's Network, OneWorld, PRISM, Careers Network, Green Team, SpeakUp, Collectively, and more Continuous learning - participate in our Graduate Development Program, Learners’ Community, and self-learning platforms Language courses - enhance your skills with courses in English, German, and Polish We know that if we are inclusive, we’re more connected, and we’re more creative. We accept people for who they are. Find out more about life at Jacobs . As a Disability Confident employer, we will interview all disabled applicants who meet the criteria for a vacancy. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team recruitmentpoland@jacobs.com