Senior Full-Stack Developer
Sigma Software · Warsaw, Masovian Voivodeship, Poland
Apply directly on Sigma Software’s careers site — no account needed. You’re early — this listing comes straight from the source, before the big boards.
About the role
- Develop and maintain modern Full Stack web applications with a strong focus on Back-end architecture and scalability
- Design and implement AI-powered features and intelligent workflows
- Build and operate reliable, secure, and scalable cloud-native services
- Collaborate with product managers, UX designers, architects, and engineering teams
- Participate in architecture discussions and technical decision-making
- Develop and maintain RESTful APIs and service-to-service communication
- Implement microservices and event-driven architecture patterns
- Ensure application reliability, observability, security, and performance
- Contribute to CI/CD processes and engineering best practices
- Promote engineering excellence and AI adoption within development teams
- At least 5+ years of commercial experience in software development
- Strong proficiency in JavaScript and TypeScript
- Hands-on experience with React and Next.js in production environments
- Strong experience with NestJS and scalable API design
- Commercial experience with Go OR strong experience with Python ecosystem technologies
- Experience with FastAPI, SQLAlchemy, pandas, numpy, and related Python tooling
- Solid understanding of microservices architecture and event-driven systems
- Experience with PostgreSQL and ORM tools such as Prisma
- Practical experience with Docker and Kubernetes
- Experience with NATS.io or similar messaging technologies
- Experience integrating IAM/SSO solutions such as Keycloak
- Strong understanding of RESTful APIs and distributed systems
- Knowledge of application security best practices
- Experience working with CI/CD pipelines and Git
- Strong analytical and problem-solving skills
- Ability to work independently and collaborate effectively in cross-functional teams
- Upper-Intermediate or higher level of English
WILL BE A PLUS:
- Experience in pharmaceutical, biotech, healthcare, or scientific research domains
- Experience working with computational or mathematical modeling platforms
- Familiarity with AI/ML integrations in enterprise applications
- Experience with regulatory or compliance-driven systems
- Experience with scientific or analytical data visualization
- Familiarity with R for research or analytical purposes
PERSONAL PROFILE:
- Proactive and ownership-driven mindset
- Strong collaboration and communication skills
- Ability to work effectively in complex technical environments
- Interest in modern AI technologies and innovation
- Focus on engineering quality and continuous improvement
Skills
- C
- Three.js
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