Elixir Developer

Every day, somewhere in the world, important decisions are made. Whether it is a private equity company deciding to invest millions into a business or a large corporation implementing a new strategic direction, these decisions impact employees, customers, and other stakeholders. 

Consulting and private equity firms come to proSapient when they need to discover knowledge to help them make great decisions and succeed in their goals. It is our mission to support them in their discovery of knowledge. 

We help our clients find industry experts who can provide their knowledge via interview or survey: we curate this knowledge in a market-leading software platform; and we help clients surface knowledge they already have through expansive knowledge management. 

We’re seeking an Elixir Developer who’s ready to take on exciting technical challenges and make an impact on a global scale. You’ll play a key role in developing robust, scalable applications that power our industry-leading platform - helping the world’s top firms make smarter, faster decisions. Join a team that values innovation, collaboration, and continuous growth. 

Our Product & Engineering team spans multiple locations, but we’re excited to be building a vibrant Engineering Hub in Lisbon, Portugal. Being based in or relocating to Portugal is a big plus. 

We work hybrid, combining flexibility with connection — and we love getting together in the office now and then to collaborate, share ideas, and stay close as a team. 

Key Responsibilities 

• Develop and maintain scalable, efficient, and high-quality Elixir web applications. 

• Design, optimize, and troubleshoot SQL queries and performance issues. 

• Collaborate with cross-functional teams to design and implement new features and improvements. 

• Write clean, maintainable, and testable code adhering to industry best practices. 

• Contribute to architectural decisions and optimize system performance. 

• Proven experience in building and maintaining Elixir-based web applications (e.g., knowledge of Phoenix). 

• Strong understanding of SQL, including profiling and building efficient queries. 

• Solid problem-solving skills and the ability to troubleshoot complex systems. 

• BS/MS in Computer Science or equivalent industry experience 

• Proficiency in English to effectively communicate with the product team. 

Bonus Skills 

• Familiarity with Absinthe (GraphQL) and Oban (Job Processing). 

• Knowledge of DevOps practices and deployment pipelines. 

• Experience working in the SaaS or FinTech industry. 

• AI/ML/LLMs, understanding of agentic architectures, workflow optimisation, prompt engineering 

What we can offer you: 

• Tenure Gifts - Vouchers, extra holiday and sabbaticals for each year of employment. 

• Health insurance
• Enhanced Maternity & Paternity pay. 
• Corporate Events - From quarterly gatherings to our annual winter & Summer parties, we love to celebrate, collaborate and have fun together!  

We are committed to building an inclusive workplace – did you know that marginalized groups are less likely to apply to jobs unless they meet every requirement listed? If you are interested in the above role, but don’t necessarily tick every box, we encourage you to apply anyway – this role could still be a great match! Take a look at our diversity statement here.