Senior Elixir Engineer

Arionkoder; United States; Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Monthly USD Service Fee

PTO 20 days + local holidays

Caregiver Time Off

Remote work culture

Entrepreneurial environment

Job summary

Arionkoder is seeking a Senior Software Engineer (Elixir) to design, develop, test, and deploy world‑class Elixir applications. You will optimize APIs for speed, security, and scalability while collaborating with cross‑functional teams and clients.

You will mentor engineers, contribute to architecture discussions, and stay current with Elixir trends to drive innovation across projects.

Qualifications

• 7+ years of software development with substantial Elixir experience.
• Proven track record delivering secure, performant Elixir-based apps to production.
• Experience designing RESTful APIs using OpenAPI specs.
• Proficiency with PostgreSQL and SQLite databases.
• Git proficiency and familiarity with Agile/Kanban workflows.

Responsibilities

• Design, develop, test, deploy, and maintain Elixir-based APIs and services.
• Optimize applications for speed, reliability, and scalability.
• Ensure API security protocols are in place to protect data and systems.
• Collaborate with cross-functional teams and external partners to deliver features.
• Identify bottlenecks and improve architecture with senior engineers.
• Create and maintain technical documentation for APIs and integrations.
• Mentor other developers and contribute to technical decision making.
• Stay updated on Elixir trends and best practices.

Skills

Elixir development

Phoenix / LiveView

REST APIs

PostgreSQL

Git

Agile / Kanban

AWS

Containerization

Tools

OpenAPI

Job description

Arionkoder is an AI consulting firm helping companies build, embed, and own AI systems that drive real business outcomes. We combine Product Development, Artificial Intelligence, and Team Augmentation to craft digital products and solutions that create lasting impact — guided by a human‑centric approach and a commitment to pushing the boundaries of what technology can do.

What you’ll do

The Senior Software Engineer (Elixir) reports to the Engineering Manager and works closely with cross‑functional teams including other software engineers, architects, quality assurance, and product managers to ensure seamless, high‑quality product and platform delivery. In this role, you will design, develop, test, deploy, and maintain world‑class applications written in Elixir. You will also optimize these applications for speed, reliability, and scalability.

Your Impact

• Design, develop, deploy, and maintain high‑performance, robust, and scalable APIs using Elixir. Also, conduct performance optimization to improve system responsiveness and throughput.
• Ensure API security protocols are in place to protect data and systems.
• Collaborate with cross‑functional teams, both internal and external, to define, design, and bring innovative features to life.
• Identify and resolve issues and performance bottlenecks with existing API and integration architectures.
• Create and maintain technical documentation for API usage and system integrations.
• Uphold and propagate best practices in server‑side Elixir‑based application design, and collaborate with architects and engineers to continuously improve upon these best practices.
• Engage in architectural discussions and actively contribute to the technical decision‑making process.
• Mentor other developers to foster a culture of innovation, quality, and growth.
• Continuously research, evaluate, test, and implement new technologies to optimize application performance and development efficiency.
• Collaborate with external stakeholders to design efficient integrations.
• Maintain up‑to‑date knowledge of Elixir trends, technologies, and best practices.

What you bring to the table

• Minimum of 7 years of software development experience with substantial professional Elixir development experience (we use Phoenix, LiveView experience is a plus).
• Proven track record of delivering high‑quality, secure, and performant Elixir‑based applications to production environments.
• Expertise in working with and designing RESTful APIs (we use OpenAPI specs).
• Proficiency in working with and designing solutions using multiple database systems (we use PostgreSQL primarily, with some SQLite).
• Proficiency in working with various version control systems (we use Git).
• Experience working in Agile and Kanban environments.
• Familiarity with cloud platforms and various architecture types (we are on AWS).
• Familiarity with containerization and container orchestration.
• Experience working with external clients, partners, and vendors.
• You consider multiple options when designing a solution.
• You are an all‑around great person to work with!

Bonus points

• Experience in the Travel/Lifestyle industry.
• Experience working with asynchronous event‑driven architecture.
• You have led teams and/or projects, either in an official or unofficial capacity.
• You’ve been a full‑stack developer in previous roles and can assist in front‑enddevelopment efforts (we use React).
• You’ve designed and architected an end‑to‑end application and deployed it to production where it is used by end users like yourself.

Benefits

• Monthly USD Service Fee
• 20 business days of paid Agreed Time Off—Annual + 6 Local Holidays
• Caregiver Time Off
• A dynamic remote work culture. You can work from anywhere!
• An entrepreneurial environment.

About us

In 2010, our founders dreamed up a company that could positively impact the world. Since then, we’ve been in permanent evolution: from business consulting to innovation and design, and now to building amazing digital products powered by AI. We scaled globally, launched AI Labs and Reshape Studios, and claimed our space as an AI consulting firm — helping organizations move from pilots to production through accountable AI. Today, we’re expanding our impact across industries, driving real AI adoption through accountability, governance, and value at scale. Dreamers first, builders always.