As a Senior Backend Engineer, you will build secure microservices, improve code quality, and own services end-to-end while leveraging modern technologies in a collaborative environment.
Hybrid based in London or Warsaw, or fully remote from Poland or the UK.
Join Our Mission 🚀 Help ambitious founders scale their businesses through innovative financing solutions. We value curiosity, continuous learning, and impactful problem-solving.
Tech You’ll Use 🔧
- Core: Java 21, Spring Boot/Cloud 3.3
- Infra: GCP, Kubernetes
- Databases: SQL/NoSQL (picked per use case)
Your Impact ✍️
- Build secure microservices for financial systems.
- Own services end-to-end (design → deploy → monitor).
- Improve code quality with automation & modern practices (CI/CD pipelines in 15 mins).
- Stay ahead with cutting-edge tech and share insights.
- Thrive in a meetings-light, Kanban-driven team.
Why Uncapped?
- Create a fintech solution chosen by 1000s of businesses.
- Build a product you can help shape and have impact on.
- Backed by top VCs (LakeStar, SeedCamp, etc.).
Requirements
We Seek 🔍
- A minimum C1 level of English proficiency is required.
- Minimum 8 years of experience
- Passion for learning Java/Spring nuances.
- Testing expertise.
- Team player who values autonomy.
- Happy to come to the office twice a week
Benefits
Benefits 🍱
- Unlimited paid holiday
- Personal growth fund
- Macbook Pro
We can only consider applications from candidates who are eligible to work in the UK/Poland or any other European country without requiring visa sponsorship.
Founded in 2019 to fix startup funding gaps.
Top Skills
GCP
Java 21
Kubernetes
NoSQL
Spring Boot
Spring Cloud 3.3
SQL
Uncapped London, England Office
5 Bonhill Street, London, United Kingdom, EC2A 4BX
Uncapped Sevenoaks, England Office
42/44 Buckhurst Avenue, Sevenoaks, United Kingdom, TN13 1LZ
Similar Jobs
Artificial Intelligence • Enterprise Web • Information Technology • Productivity • Sales • Software • Database
As a Senior Backend Engineer, you will design scalable backend systems, lead full software lifecycle, mentor teammates, and communicate progress effectively.
Top Skills:
AnsibleDockerElasticsearchGCPGithub ActionsGrafanaKibanaKubernetesMongoDBReactReduxRuby/RorTerraformTypescript
Cloud • Information Technology • Insurance • Software • Analytics
Design, build, test, and maintain Python-based RESTful APIs and backend services using FastAPI/Flask, SQLAlchemy, and pydantic; optimize performance across code, database, and infrastructure; support deployments on Kubernetes/AWS; collaborate via PRs, RFCs/ADRs and agile ceremonies.
Top Skills:
Python,Fastapi,Flask,Sqlalchemy,Pydantic,Celery,Numpy,Pandas,Polars,Aws,Azure,Kubernetes,Docker,Postgresql,Redis,S3,Iam
Hardware
Design and maintain distributed microservices, work with event streaming technologies, and deploy services in Kubernetes. Collaborate with teams for architecture and code optimization.
Top Skills:
.NetApache PulsarAzure)Cloud Ci/Cd Systems (AwsGCPGoGrafanaJavaKafkaKubernetesNode.jsOpentelemetryPostgresPrometheusPythonRedisRust
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
