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Full Stack Engineer (Elixir, LiveView, LLMs)

3 billion people across the world work in frontline jobs. Yet, despite rising costs and staff shortages, frontline organisations are still left to choose between paper, Excel, and WhatsApp, or decade-old workforce management solutions to take care of the most important part of their businesses - their people.

Enter Sona: the next generation of AI-native, frontline workforce management. We’ve built an end-to-end platform covering Scheduling, HR, Payroll, and Communications that gives the largest frontline organisations everything they need to staff more intelligently and empower their teams.

In under 4 years, we’ve already made a deep impact on the lives of over 100k frontline workers and the operation of their organisations, grown the team to 110+, and secured over $50M in funding from notable VC’s, including Felicis, Northzone, Gradient Ventures (Google), SpeedInvest, Antler, and Notion Capital, plus notable angels like Tom Blomfield (Monzo).

It’s a hugely exciting time to be joining the team as we’re still small enough that you’ll have a significant impact on the company’s growth trajectory and culture, yet large enough to have a great structure, experienced leaders and world-class benefits in place. More on working at Sona here.

About the Role

Our stack is built primarily around Elixir, with a Phoenix LiveView web frontend (PETAL stack) and a GraphQL API for communicating with our React Native mobile app. Working towards truly automated workforce management, you’ll join one of our core product pods and focus on iterating on our early agentic AI prototypes, powered by the latest LLMs.

We fundamentally believe that the best products are built when small, cross functional, autonomous teams are empowered to solve business problems as they see fit. Everything starts with our customers and our engineers (and wider Product team) work closely with our Customer team and users themselves to ensure we’re building a product that fits our users needs. Our Product team principles give more of a flavour of how we like to work day-to-day.

We're also huge fans of agentic coding and believe in its ability to dramatically increase our leverage. We especially love tools like Aider and believe they can add huge value across engineering, product and design. If you've got experience working with similar tools, we'd love to hear about it!

Requirements

Everybody’s different, but a lot of the following probably applies to you:

  • You have strong professional experience in both Elixir and working with the latest LLMs

  • You have a focus on “getting it shipped” and doing so quickly. When given the choice between “complicated and shiny” vs “get something simple but powerful in front of a user”, you always choose the latter.

  • You’re bullish on what the next 12 months holds for building AI agents and how much change is going to be driven by AI in 2025.

  • You’re comfortable working directly with c-level internal and stakeholders and excel at translating between real world problems and technical solutions for a non-technical audience. 

  • You can point at multiple examples - whether you published them or not - of things you've hacked together in Elixir which use LLM's and you've got a list 10 times that long of things you'd like to do if only you had the time.

  • You’re in a country which is GMT +/- 3 and fluent communicating both verbally and in writing in English

  • You’re able to attend in-person company meetups 2-3 times per year, these will be around 4 days long and usually require flying both in and outside of Europe 

Benefits

  • Salary (converted directly to local currency for employees outside UK):

    • Senior Engineer: £75-95k 

    • Staff Engineer: £95-115k

  • Full remote and flexible working

  • Share options

  • 35 days annual leave (25 days standard plus 10 flexible public holiday days) 

  • Extra day of leave for every year of service

  • Pension contributions matched up to 5%

  • Comprehensive health insurance

  • Enhanced parental leave & pay

  • Co-working space stipend for those based outside London

  • Bi-annual all expenses paid team retreats

  • The latest Macbook and equipment budget for your home office

  • Professional development budget

  • Unlimited free books


Note: this represents a typical benefits package for a UK-based, full-time employee. Exact details may vary based on location and employment type but we try to be as fair as possible to all of our team members. Please ask your contact in the Talent team to clarify the available benefits for you. 

Average salary estimate

$85000 / YEARLY (est.)
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$75000K
$95000K

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What You Should Know About Full Stack Engineer (Elixir, LiveView, LLMs), Sona

Join Sona as a Full Stack Engineer and be part of a dynamic team shaping the future of frontline workforce management in London. At Sona, we understand the challenges faced by frontline organizations, and our AI-native platform is designed to revolutionize their operations. As a Full Stack Engineer, you'll dive into our cutting-edge tech stack, primarily working with Elixir, Phoenix LiveView, and GraphQL. You'll play a crucial role in enhancing our AI capabilities, iterating on prototypes, and driving innovation. Our product teams embrace empowerment, collaboration, and a customer-first approach, ensuring that what we build truly meets user needs. With strong backing from notable VC investors and a passionate team of over 110 professionals, this is an exciting opportunity to make a significant impact while enjoying an inspiring work environment. You'll be part of a culture that values agentic coding, encourages hands-on problem solving, and leverages the latest tools to maximize efficiency. We're on the hunt for someone who thrives in this fast-paced environment and is excited about the future of AI. If you’re ready to push boundaries and create meaningful solutions, Sona is the place for you. Think you have what it takes? Let’s chat and see how you can help us empower frontline workers around the globe!

Frequently Asked Questions (FAQs) for Full Stack Engineer (Elixir, LiveView, LLMs) Role at Sona
What are the key responsibilities of a Full Stack Engineer at Sona?

As a Full Stack Engineer at Sona, your key responsibilities will include developing and iterating on our product features using Elixir and Phoenix LiveView, collaborating closely with the product and customer teams to understand user needs, and working on integrating AI capabilities into our solutions. You’ll be part of a cross-functional team focused on building efficient, reliable software that directly impacts frontline workers.

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What qualifications are required for the Full Stack Engineer position at Sona?

To qualify for the Full Stack Engineer role at Sona, you should have strong professional experience with Elixir and familiarity with working on projects involving LLMs. You’ll also need a proven ability to translate complex technical concepts to non-technical stakeholders and a passion for delivering practical solutions quickly. Effective communication and problem-solving skills are essential as you work with c-level executives and various teams.

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What technologies should a Full Stack Engineer be familiar with at Sona?

A Full Stack Engineer at Sona should ideally be well-versed in Elixir, Phoenix LiveView, and GraphQL, along with experience in mobile app development using React Native. Familiarity with AI and LLMs will be a significant advantage, as we are looking to integrate these technologies meaningfully into our workforce management solutions.

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How does Sona support professional development for Full Stack Engineers?

At Sona, we believe in continuous growth and learning. Full Stack Engineers are provided with a professional development budget, along with access to the latest resources and tools. We also encourage team members to pursue their interests and provide unlimited free books to facilitate learning. Additionally, attendance at team retreats enhances collaboration and personal growth.

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What benefits can I expect as a Full Stack Engineer at Sona?

As a Full Stack Engineer at Sona, you'll enjoy a competitive salary ranging from £75-115k, flexible remote working options, share options, and an impressive 35 days of annual leave. Additional benefits include matched pension contributions, comprehensive health insurance, enhanced parental leave, and a home office budget, ensuring you have everything you need to thrive both personally and professionally.

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Common Interview Questions for Full Stack Engineer (Elixir, LiveView, LLMs)
Can you describe your experience with Elixir and how you have used it in previous projects?

When answering this question, provide specific examples of projects where you utilized Elixir. Discuss the challenges you faced, how you approached problem-solving, and the results you achieved. Highlight your familiarity with its concurrency model and how it aided in building scalable applications.

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How do you prioritize tasks when working on multiple features in a fast-paced environment?

To answer this effectively, discuss your approach to task prioritization, perhaps using tools like Agile methodologies or Kanban boards. Emphasize the importance of aligning tasks with business goals and staying in sync with your team to ensure key features are delivered on time.

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What is your experience with working in cross-functional teams, and how do you ensure smooth collaboration?

Here, you should highlight specific experiences working with product, design, and customer success teams. Talk about your communication strategies, tools you may use, and how you’ve facilitated discussions to ensure everyone is aligned towards common goals.

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Can you explain the concept of agentic coding and how you've applied it?

In your response, demonstrate a clear understanding of agentic coding, discussing how it promotes autonomy and efficiency in software development. Provide an example of how you applied this in previous projects, focusing on how it improved your team's output.

Join Rise to see the full answer
What do you find most exciting about the potential for AI in workforce management?

Share your views on the advancements in AI technologies, particularly in automating tedious tasks and enhancing decision-making in workforce management. Discuss specific examples or areas you believe will see significant transformation and how you can contribute to this evolution.

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How do you stay updated with the latest technologies and trends in software development?

Discuss your commitment to continuous learning, whether through following industry blogs, attending conferences, participating in online courses, or engaging in open-source projects. Highlight any relevant certifications or community involvement that illustrates your dedication.

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Give an example of a challenging bug you encountered and how you resolved it.

Focus on a specific incident where you encountered a significant bug, detailing the steps you took to identify, analyze, and resolve it. Emphasize the importance of collaboration and seeking input from team members, as well as the final outcome of your efforts.

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What tools do you use for version control and collaboration in your projects?

Outline your familiarity with version control systems like Git, including how you utilize branching, merging, and pull requests. Discuss collaboration tools such as Jira or Trello that help you manage tasks and communicate with team members effectively.

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How do you approach testing your code to ensure high quality and reliability?

Describe your testing strategies, including unit tests, integration tests, and end-to-end testing methodologies. Discuss how you integrate testing into your development process to catch issues early and maintain code quality.

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Why do you want to work at Sona as a Full Stack Engineer?

Your answer should reflect your understanding of Sona’s mission and values. Express enthusiasm about the opportunity to contribute to an innovative platform that positively impacts frontline workers. Mention any specific aspects of Sona's culture or technologies that resonate with you.

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Understanding growth is in our DNA. Ramu grew hi5, an early social network, from inception to 200 million users entirely through viral marketing and a sizable growth team. Following hi5, we did large-scale customer acquisition in several verticals...

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DATE POSTED
April 17, 2025

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