Senior Backend Engineer

Teya Services Ltd; City Of London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A payment service provider in London is looking for an experienced Backend Engineer to maintain and evolve backend services. The ideal candidate has 7+ years in Backend Engineering, strong Java or Kotlin skills, and experience in production systems. Join a team committed to supporting small businesses, and enjoy a high-energy culture focused on continuous learning and comprehensive benefits.

Qualifications

• At least 7+ years of Backend Engineering experience.
• Proven hands-on experience in production systems with Java or Kotlin.
• Strong debugging, problem-solving, and communication skills.

Responsibilities

• Maintain and evolve backend services in real production systems.
• Ensure high code quality through clean code practices, unit testing, and integration testing.
• Take ownership of features and initiatives from design to monitoring.

Skills

Backend Engineering

Java

Kotlin

RDBMS (Aurora MySQL)

Clean code practices

Distributed systems

AWS services

REST APIs

Monitoring tools

Agile environments

Tools

JUnit

Docker

Grafana

New Relic

Job description

Hello! We're Teya.

Teya is a payment and software service provider, headquartered in London serving small, local businesses across Europe. Founded in 2019, we build easy to use, integrated tools that enable our members to accept payments and boost business performance.

At Teya we believe small, local businesses are the lifeblood of our communities.

We're here because we don't believe there's a level playing field that gives small businesses with a fighting chance against the giants of the high street.

We're here because we see banks and legacy service providers making things harder for them. We don't think the best technology or the best service should be reserved for those with the biggest headquarters.

We're here to fight for a future where small, local businesses can thrive, and to commit the same dedication they offer all of us.

Become a part of our story.

We're looking for exceptional talent to join our mission. We offer a chance to create impact in a high-energy and connected culture, while benefiting from continuous learning opportunities, a supportive community which is proud to serve our mission, and comprehensive benefits.

Your Mission

Loyverse are hiring Backend Engineer to work on mission-critical backend services that power our POS ecosystem - APIs, dataservers, billing, and integrations. The role involves maintaining and extending existing systems, building new features, improving observability, and taking part in support duty.

We are looking for engineers with proven production experience, who can take ownership of initiatives, drive end-to-end development, communicate effectively with cross-functional teams, write clean, testable code, and thrive in a continuous delivery, fast-paced release cycle environment.

Responsibilities:

• Maintain and evolve backend services (Spring Boot, Netty) in real production systems.
• Ensure high code quality through clean code practices, unit testing, and integration testing (JUnit, Testcontainers).
• Take ownership of features and initiatives - from design through development, testing, deployment, and monitoring.
• Participate in support duty rotation to keep services reliable.
• Improve observability & monitoring (metrics, tracing, logging) for faster incident response.
• Drive cross-team communication to align development with product and operations.
• Contribute to continuous delivery pipelines and ensure smooth weekly releases.

Your Story

• At least 7+ years of Backend Engineering experience
• Proven hands-on experience in production systems with Java or Kotlin (we are a Kotlin-first team).
• Strong debugging, problem-solving, and communication skills.
• Strong knowledge of RDBMS (Aurora MySQL 8) - transactions, indexing, query optimization.
• Expertise in clean code, testable architecture, and continuous delivery.
• Solid experience with distributed systems (Redis, Memcached, SQS).
• Familiarity with fast-paced release cycles and agile environments.
• Monitoring experience with tools like Grafana, New Relic, CloudWatch.
• Cloud knowledge: AWS services (ECS, S3, CloudWatch).
• Experience designing and consuming REST APIs and familiarity with OAuth2 flows.
• Fluent in English.

Nice to have:

• Experience with NoSQL (MongoDB or similar).
• Familiarity with CQRS / event-driven architectures.
• Knowledge of containerized deployments (Docker, ECS, Kubernetes).
• Experience with support duty / on-call rotations.

Teya is proud to be an equal opportunity employer.

We are committed to creating an inclusive environment where everyone regardless of race, ethnicity, gender identity or expression, sexual orientation, age, disability, religion, or background can thrive and do their best work. We believe that a diverse team leads to better ideas, stronger outcomes, and a more supportive workplace for all.

If you require any reasonable adjustments at any stage of the recruitment process whether for interviews, assessments, or other parts of the application-we encourage you to let us know. We are committed to ensuring that every candidate has a fair and accessible experience with us.