Junior Back-end Developer
Quick Summary
Maintain and extend three TypeScript microservices running on AWS Lambda that generate Word, PowerPoint, and Excel documents Learn and contribute to our GraphQL API, the backbone of our back-end architecture Gradually take on responsibilities in…
Our goal is to identify a candidate with a genuine interest in investments, data analysis, and reporting, has intellectual curiosity, strong project and time management skills, and a true appreciation for the value of building strong, trusted relationships with clients and fellow Callan colleagues.
- Maintain and extend three TypeScript microservices running on AWS Lambda that generate Word, PowerPoint, and Excel documents
- Learn and contribute to our GraphQL API, the backbone of our back-end architecture
- Gradually take on responsibilities in PostgreSQL (Amazon RDS), including creating and managing tables and views
- Collaborate with the team using Jira for ticket tracking and Bitbucket for version control
- Test, debug issues, write clean and maintainable TypeScript, and document your work as you learn the system
- Learn, understand, and implement security protocols and data protection measures
- Attend in-person and Zoom meetings to collaborate with the team
- Partner with senior team members to improve skills and gain experience in back-end development
- Solid foundational knowledge of TypeScript
- Familiarity with GraphQL concepts and APIs
- Basic SQL skills, including writing queries and understanding relational schemas
- Experience with Git-based workflows (Bitbucket experience is a plus, not required)
- Exposure to AWS or serverless architecture is preferred, not required
- Understanding of Office Open XML (OOXML) — knowledge of how Word, Excel, and PowerPoint files are structured under the hood
- Ability to collaborate effectively on cross-functional teams
- Strong time management skills and ability to prioritize and manage multiple projects efficiently
- Demonstrated ability to receive and integrate feedback
- Effective and professional communication and analytical skills
- Exceptional problem-solving skills
- Excellent organizational skills, strong attention to detail, and the ability to prioritize work to meet deadlines even during the busiest times
- Build and maintain relationships internally and externally
- Advanced technical skills with Microsoft Office applications, including Excel and Access
- Understanding security protocols and data protection measures
- Passionate about learning and seeking information to uncover answers and generate new ideas, including the ability to ask for help when needed
- Self-motivated and proactive
- Resourceful and has a great deal of patience
- Responsive, detail-oriented, and accurate with the ability to meet deadlines
- Ability to work independently without supervision in an unstructured environment, managing multiple deadlines
- Emphasis on team over self
- Completion of post-secondary education, such as coding bootcamp and relevant works experience required. Bachelor’s degree or equivalent, preferably in computer science, computer engineering, or related field is preferred
- Minimum 3 – 5+ years of work experience in backend development, including working with and building APIs
- Familiarity with the investment management industry (CFA or similar credentials are a plus, not required)
- Experience with any of the following is a strong plus:
-
- PPTXGenJS — PowerPoint generation
- pptx-automizer — Template-based PowerPoint automation
- excel4node — Excel spreadsheet generation
- docx (docxjs) — Word document generation
-
- Familiar with the following Tech Stack:
-
- Language: TypeScript
- API Layer: GraphQL
- Runtime: AWS Lambda
- Database: PostgreSQL (Amazon RDS)
- Version Control: Git (Bitbucket)
- Project Management: Jira
-
What We Offer
~1 min readLocation & Eligibility
Listing Details
- Posted
- May 1, 2026
- First seen
- May 4, 2026
- Last seen
- May 5, 2026
Posting Health
- Days active
- 0
- Repost count
- 0
- Trust Level
- 73%
- Scored at
- May 5, 2026
Signal breakdown
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