Senior Full Stack Engineer

Ciklum is looking for a Senior Full Stack Engineer to join our team full-time in Romania.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior Full Stack Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.

Project Description: Are you a hands-on developer who loves writing code and solving complex technical challenges? Do you thrive in a team environment but can also take ownership of end-to-end feature development? If so, we want you on our team!

At Client's company you’re becoming part of a team that values innovation and collaboration, where your contributions truly matter. We are an innovative and dynamic startup dedicated to empowering developers by providing seamless and secure user management infrastructure, helping them achieve their goals and create amazing products.

Our customers are first-class, and with your expertise, we can continue to exceed their expectations and create success stories that inspire. If you’re ready to build something exstraordinary and take your career to the next level, Client is the place for you. Let’s achieve remarkable growth together and make a significant impact in the SaaS industry!

Responsibilities:

• Take full ownership of end-to-end development of key features in identity and access management
• Work with cutting-edge AI to enhance development and security workflows
• Drive technical excellence and help shape the architecture of our platform
• Collaborate with a small but strong team of 4 developers and a team lead, contributing your expertise and leadership to raise the technical bar
• Optimize and scale authentication and authorization systems with OAuth, JWT, SAML, WebAuthn, and more
• Build and optimize services using NestJS (Node.js), TypeScript, and AWS
• Take ownership of complex challenges, working both independently and within the team

Requirements:

• A highly skilled Backend Developer with 6+ years of experience, specializing in NestJS, Node.js
• Experience working in high-scale production environments
• Analytic thinking - Independent people who can lead the development of new features
• Deeply passionate about writing clean, efficient, and scalable code leveraging AI tools
• A problem solver who loves working with AI and using it to boost productivity
• Experienced in designing and implementing complex distributed systems
• Comfortably leading technical decisions and mentoring the team
• Hands-on with authentication, security, and identity management (SSO etc.) - Great Advantage
• Experience with Kafka, Redis, MySQL, OAuth, JWT, AWS is a strong advantage, and familiarity with MongoDB is a plus
• Typescript experience
• 10% FE (React)

What’s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Enjoy radical flexibility – work remotely or from an office, your choice
• Care: Medical subscription to Regina Maria, meal tickets of 16 ron net/day worked

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

In Romania, we welcome top-tier tech talent — whether from our Bucharest office or fully remotely. Tap into deep industry knowledge, grow your career, and make an impact in an empowering environment.

Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

#LI-SM1