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Senior Kotlin Backend Jobs (NOW HIRING)

N-iX

Senior Kotlin Engineer (#5643)

Union, NJ · On-site

$120 - $160/hr

We're looking for a Senior Back-End Engineer to design, build and operate scalable Kotlin microservices on AWS, increasing delivery throughput without compromising quality Responsibilities * Design ...

CMP.jobs

Sr. Kotlin Engineer

Indianapolis, IN · Remote

The Sr. Software Engineer will be responsible for a good portion of development working with ... The back end is made up of microservice containers that are managed using Kubernetes. Kotlin is the ...

Slang AI

Backend Engineer

New York, NY · On-site

$162K/yr

You'll spend roughly 90% of your time developing backend services in Kotlin, with occasional ... The cross-functional nature of the role will accelerate your growth toward senior engineering roles.

landa

Senior Backend/ Infrastructure Engineer

Manhattan, NY · On-site

$120 - $150/hr

This is a senior individual contributor role ideal for someone with 5 to 8+ years of experience who ... JavaScript/TypeScript, Python or Kotlin backend services * AWS infrastructure and cloud services ...

New

zollsoft GmbH

$70.90 - $94.53/hr

Als Senior Softwareentwickler:in Kotlin/Java bist Du bei uns der Dreh- und Angelpunkt, wenn es um die Weiterentwicklung unserer Backend-Systeme geht. * Mit Kotlin, Docker und PostgreSQL baust Du ...

New

EPAM Systems

Senior Java Developer (with Kotlin)

Atlanta, GA · On-site

$115K - $150K/yr

We're seeking a Senior Java Developer with strong Kotlin expertise to build and scale the Backend for Frontend (BFF) service layer powering mobile applications used by tens of millions of users ...

Slang AI

Sr Backend Engineer

New York, NY · On-site

$185K - $215K/yr

Our backend is written in Kotlin, but prior Kotlin experience is not required; strong fundamentals ... As a senior engineer, you'll own features end to end and help shape technical direction for your ...

N-iX

Senior Data Backend Engineer (#5644)

Union, NJ · On-site

$130 - $190/hr

N-iX is looking for a Senior Data Backend Engineer (Kotlin) to join a new engagement with a leading European fintech company. This is an exciting opportunity to become part of a modern engineering ...

New

Slang

Sr Backend Engineer

Manhattan, NY · On-site

$185 - $215/hr

Our backend is written in Kotlin, but prior Kotlin experience is not required; strong fundamentals ... As a senior engineer, you'll own features end to end and help shape technical direction for your ...

New

Siro

Senior Software Engineer, Backend

New York, NY · On-site

$240K/yr

Swift, Kotlin * Backend: Node.js, Typescript, serverless functions * Cloud: Google Cloud Platform (GCP) * Other tools: Git, Datadog, Figma Why Join Siro? * Growth: Join a rapidly scaling Series B ...

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Senior Kotlin Backend information

What does a senior Kotlin backend developer do?

A Senior Kotlin Backend Developer is responsible for designing, building, and maintaining server-side applications using the Kotlin programming language. They work on developing APIs, managing databases, optimizing application performance, and ensuring scalability and security of backend systems. Senior developers also mentor junior team members, participate in architectural decisions, and collaborate closely with frontend and DevOps teams to deliver robust software solutions.

What are some common challenges faced by senior Kotlin backend developers when working on large-scale applications?

Senior Kotlin Backend Developers often encounter challenges such as maintaining code quality and consistency across large codebases, ensuring efficient performance under heavy user loads, and integrating with legacy systems or microservices. Effective collaboration with frontend teams and DevOps is essential to streamline deployments and resolve bottlenecks. Staying up to date with Kotlin updates and backend best practices also helps in designing scalable and maintainable solutions.

What are the key skills and qualifications needed to thrive as a senior Kotlin backend developer, and why are they important?

To excel as a Senior Kotlin Backend Developer, you need deep expertise in Kotlin programming, backend architecture, and a strong understanding of APIs and databases, usually supported by a degree in computer science or equivalent experience. Familiarity with tools like Spring Boot, Docker, Kubernetes, and CI/CD systems, along with cloud platforms such as AWS or GCP, is typically required. Strong problem-solving, teamwork, and communication skills help you collaborate effectively and mentor junior developers. These competencies are vital for delivering scalable, robust backend solutions and leading technical projects in dynamic environments.

What is the difference between Senior Kotlin Backend vs Kotlin Developer?

AspectSenior Kotlin BackendKotlin Developer
Experience LevelTypically 5+ years, with leadership responsibilitiesEntry to mid-level, focused on coding and development
ResponsibilitiesDesigning architecture, mentoring, overseeing projectsWriting code, debugging, implementing features
Skills & CertificationsAdvanced Kotlin, backend frameworks, system design, leadershipProficient Kotlin, basic backend knowledge
Work EnvironmentTeam leadership, project management, collaboration with stakeholdersDevelopment teams, coding-focused tasks

Senior Kotlin Backend roles involve leadership, architecture design, and mentoring, whereas Kotlin Developers focus on coding and feature implementation. The senior position requires more experience, advanced skills, and strategic responsibilities, while Kotlin Developers are more hands-on with development tasks.

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Senior Kotlin Backend jobs near you
Infographic showing various Senior Kotlin Backend job openings in the United States as of August 2026, with employment types broken down into 90% Full Time, 3% Part Time, and 7% Contract. Highlights an 73% Physical, 7% Hybrid, and 20% Remote job distribution.

Senior Kotlin/Spring Boot Engineer at Phoenix, AZ (Onsite)

Tech Mirrors

Phoenix, AZ • On-site

$140 - $190/hr

Other

Posted 3 days ago

New

Job description

Position: Senior Kotlin/Spring Boot Engineer Location: Phoenix, AZ (Onsite) Duration: Long term C2C Skills: Kotlin Engineer, Kotlin, Spring boot, Temporal Job Description:

We’re hiring a senior Kotlin/Spring Boot contractor to help own the execution backbone of a no-code workflow platform. This is not a simple CRUD service. The Orchestrator runtime is a multi‑module system that receives workflow execution requests, persists durable state with Temporal, coordinates graph execution, integrates HTTP, agent, LLM, and human-review nodes, and safely executes increasingly AI-generated workflow graphs. You’ll join the squad responsible for the runtime layer that everything else depends on.

Responsibilities:
  • Design and harden the Kotlin/Spring Boot runtime that executes workflow graphs reliably in production.
  • Implement and improve Temporal.io workflows, activities, signals, queries, retries, and recovery paths.
  • Strengthen contract-first APIs and shared contracts.
  • Own failure-mode thinking across distributed execution retries, idempotency, partial failure, replay safety, pause/resume, and graceful degradation.
  • Work across node types, including HTTP, agentic tool-calling, LLM, and human-in-the-loop review nodes.
  • Improve integration coverage using Test containers and layered Docker Compose profiles.
  • Collaborate closely with Composer and AI/KB teams on execution semantics and runtime behavior.
  • Write clear operational documentation and runbooks for a reliability-critical service.
Qualifications:
  • Strong production Kotlin backend experience.
  • Strong Spring Boot experience in distributed systems or platform services.
  • Hands‑on Temporal experience in production.
  • Strong understanding of workflow durability, retries, idempotency, and recovery design.
  • Experience with multi‑module Gradle codebases and contract‑first API design.
  • Experience with JPA/Hibernate and PostgreSQL.
  • Experience with Docker Compose/Test containers integration testing.
  • Comfort debugging multi-service systems with mixed Kotlin and Python components.
  • Experience with observability tools like micrometer
  • Experience with contract first development
Strong Pluses:
  • Experience with DAG/workflow/orchestration engines.
  • Experience with AI/LLM/agent runtimes or other non‑deterministic execution systems.
  • Familiarity with FastAPI-based workers and cross-language integration.
  • Experience with auth/token provider abstractions, OAuth2/JWT, or cached token acquisition.
  • Experience writing operational docs, runbooks, and reliability guidance.
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